Some Microfoundations for the Great Gatsby Curve Steven N ...
Revisiting the Great Gatsby Curve · Great Gatsby Curve, initially introduced by Alan Krueger in...
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Revisiting the Great Gatsby Curve
Andros Kourtellos∗ Ioanna Stylianou†
Charalambos Tsangarides‡
Preliminary and incomplete
Abstract
The main of this paper is to uncover empirically robust determinants of incomeinequality considering theories proposed by the literature focusing particularly onthe role of innovation and intergenerational mobility. In addition, following Chettyet al. (2014) we examine if and how the same set of theories simultaneously affectintergenerational mobility and what is the role of innovation and income inequality,investigating the theory proposed by Hassler et al. (2007). We assess the abovetheories using within-country data and particularly data based on commuting zoneswhich are geographical aggregations of counties originally introduced by Tolbert andKillian (1987). Following Agnion et al. (2016) we consider the role of innovationand using patents data from Lai (2013) at the zip code level we first pair them toa county, and finally, to a commuting zone. For our analysis we consider alternativemeasures of intergenerational mobility (Absolute Upward Mobility using income andenrollments, and Relative Mobility) and income inequality (Top 1% income share,Gross and Net Gini). Finally, our empirical methodology allows us to deal withparameter heterogeneity by employing the Threshold Regression of Hansen (2000).
Keywords: innovation, social mobility, income inequality, threshold regression.
JEL Classification Codes: C59, O40, Z12.
∗Department of Economics, University of Cyprus, P.O. Box 537, CY 1678 Nicosia, Cyprus, e-mail:[email protected].
†Department of Economics, University of Cyprus, P.O. Box 537, CY 1678 Nicosia, Cyprus, e-mail:[email protected].
‡Research Department, International Monetary Fund, 700 19th Street NW, Washington DC 20431, USA,e-mail: [email protected].
1 Introduction
Over the past decades wage inequality has dramatically increased particularly in the United
States. According to the Economic Policy Institute (2016), the documented rise in real
hourly wages in 2015 is due to the sharp decrease in inflation whereas real hourly wage
growth in 2015 was fastest at the top of the wage distribution. The gap between the middle
and bottom has remained stable since 2000 but the gap between the top and everyone else
has grown. Considering the distribution of income between men and women from 2014
to 2015, the strongest wage growth was at the top of the mens wage distribution and at
the bottom of the womens wage distribution. High and sustained levels of inequality have
significant social, as well as, economic costs ( Stiglitz(2012), Ostry et al.(2014) Berg and
Ostry (2011), Galor and Moav(2004), Aghion et al.(1999)). The causal forces behind the
dramatic increase in inequality worldwide in the past decades have led to a considerable
amount of theoretical, as well as, empirical research in order to uncover the sources of income
inequality (for example, Machin and Van Reenen (1998), Katz and Murphy (1992), Berman
et al. (1994), Autor et al. (2008), Card and Lemieux (2001), DiNardo et al.(1996), Blau and
Kahn (1996), Aghion et al.(2016)). The contribution of this paper is multifold: First, we
extend the literature and we uncover empirically robust determinants of income inequality
considering theories proposed by the literature (income and population growth, racial, income
and geographical segregation, taxation policies and education, labor market conditions,
migration, social capital and family structure) focusing particularly on the role of innovation
and intergenerational mobility. Second, following Chetty et al. (2014) we examine if and how
the same set of theories simultaneously affect intergenerational mobility and what is the role
of innovation and income inequality. Krueger (2012) and Corak (2013) suggest that there is
a negative relationship between income inequality intergenerational mobility. In this paper
however, we investigate empirically the Great Gatsby Curve considering the theory proposed
by Hassler et al. (2007). In particular, the theory supports that income inequality affects
negatively intergenerational mobility when the economy is very unequal (distance effect),
and positively, when inequality is low (incentive effect). Third, we assess the above theories
using within-country data instead of cross-country which exhibits significant advantages since
the analysis is based on the same data sources and methods (Solon 2002). In particular,
our analysis is based on the commuting zones level which are geographical aggregations
of counties originally introduced by Tolbert and Killian (1987). There are approximately
741 CZs in the US and on average, each CZ contains 4 counties. There are significant
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advantages estimating the model at the commuting zone level since we are able to examine
the effect of regional characteristics and policies. Fourth, following Agnion et al. (2016) we
consider the role of innovation and using patents data from Lai (2013) at the zip code level
we first pair them to a county, and finally, to a commuting zone. Fifth, for our analysis
we consider alternative measures of intergenerational mobility (Absolute Upward Mobility
using income and enrollments, and Relative Mobility) and income inequality (Top 1% income
share, Gross and Net Gini) using pre-tax, pre-transfer and after-tax, after-transfer income,
based on data from the US Census Bureau. Finally, our empirical methodology allows us to
deal with parameter heterogeneity which refers to the idea that the data generating process
that describes the stochastic phenomenon of intergenerational mobility or income inequality
is not common for all observations (commuting zones). We address parameter heterogeneity
by employing the Threshold Regression introduced by Hansen (2000).
2 The Linear Intergenerational Mobility and Income
Inequality Models
Following Chetty et al.(2014), for each commuting zone i we assume that the
intergenerational mobility between parents and offspring is determined by the following linear
regression model,
Mobilityi = α + x′iβ + ei (2.1)
where α is an intercept, xi is a p× 1 vector of intergenerational mobility determinants and
ei is an i.i.d. error term for i = 1, 2, ..., n. Commuting zones are a spatial measure of local
labor markets consisting of one or more counties or county equivalents, originally introduced
by Tolbert and Killian (1987) and Tolbert and Sizer (1996) based on commuting patterns in
the 1980 and 1990 Census, respectively. In 1980, 768 commuting zones were delineated for
all U.S. counties and county equivalents, and 741 in 1990.
As Chetty et al.(2014) point out, using the classic intergenerational elasticity of income
(IGE) by regressing log child income on log parent income, exhibits significant disadvantages:
First, observations with zero income are not included leading to biased mobility estimates
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and second, the relationship between log parent income and log child income is non-linear.
These obstacles are properly addressed by Chetty et al.(2014) using a rank-rank LS regression
between children’s percentile rank based on their position in the distribution of child income
within their birth cohorts and the percentile rank of the parents based on their position
in the distribution of parent income. In particular, for each commuting zone i Chetty et
al.(2014) estimate the following regression:
ycji = θ0i + θ1iypji + ϵji (2.2)
where ycji denotes the national income rank of child j among children in his birth cohort in
commuting zone i, and ypji is the corresponding rank of the parent in the income distribution
of parents in the core sample.
Following Chetty et al.(2014) we measure intergenerational mobility using the Absolute
Upward Mobility. Absolute mobility in general, is defined as the expected child rank of
children born to a parent whose national income rank is p in commuting zone i, and Absolute
Upward Mobility is specifically focused on children from families with below median parent
income.
Chetty et al.(2014) calculate parent and child income using data from 1040 federal
income tax records from the IRS Databank and their baseline analysis is focused on a core
sample of 1980-1982 birth cohorts. The children’s income is defined as the mean total family
income in 2011 and 2012, when they are approximately 30 years old and the their parents’
income is defined as the mean family income between 1996 and 2000, when the children are
between the ages of 15 and 20. Chetty et al.(2014) show that estimates of intergenerational
mobility stabilize when children reach their late twenties and thus, the choice of the particular
birth cohort tackles successfully any problems of lifecycle bias due to measuring income at
early or late ages. They also support that, mobility estimates are robust to the age of parents
given that parent income is measured between age 30 and 55.
Following the economics and sociology literature we consider determinants of
intergenerational mobility from eleven broad categories or theories: Segregation, Income
and Income Inequality, Tax, Education, College, Labor Market, Migration, Social Capital,
Family Structure, Innovation and Population Growth.
Following Chetty et al.(2014) we start with the racial, income, and geographical
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segregation variables. For racial segregation we use the number of individuals who are
black divided by the total population within a commuting zone and a multi-group Theil
Index calculated at the census-tract level over four racial groups (white, black, hispanic
and other). Income segregation is captured by a two-group Theil index and reflects the
degree which individuals below the pth percentile of the local household income distribution
are segregated from individuals above the pth percentile in each commuting zone. For
geographical segregation we use the Fraction with Commute < 15 mins, which is the number
of workers that commute less than 15 minutes to work divided by the total number of
workers. All variables are from the 2000 Census and according to Chetty et al.(2014) there
is a significant negative relationship between Absolute Upward Mobility, racial and income
segregation whereas areas with shorter commutes have higher rates of upward mobility.
The connection between income inequality and upward mobility is portrayed by the
Great Gatsby Curve, initially introduced by Alan Krueger in 2012. In particular, countries
with greater levels of income inequality also have lower levels of intergenerational mobility.
To examine therefore if this relationship is empirically supported at the commuting zone
level, we consider two income inequality measures: The Gini coefficient of parent income
within each commuting zone from Census Bureau calculated over the period 2006-2010 and
the Top 1% Income Share, which is the fraction of income going to the top 1% defined within
the commuting zone in 2010 from the Economic Policy Institute. In addition, we include
the mean level of Household Income per Capita for working-age adults in a commuting zone
measured in the 2000 Census and Income per Capita for the period 2006-2010 from the
Bureau of Economic Analysis. Notably, both inequality variables and Income per Capita
from the Bureau of Economic Analysis were initially available at the county level which we
have carefully grouped into commuting zones. It is important to mention that the empirical
findings of Chetty et al.(2014) show a negative relationship between the Gini coefficient and
mobility, but a limited association between mean income levels, Top 1% Income Share and
mobility.
The significant impact of tax policies on intergenerational mobility has also been
documented in the literature (Becker and Tomes (1979, 1986), Mulligan (1997)). For
example, Becker and Tomes (1979) who developed a general equilibrium model of income
distribution across family generations show that even a progressive tax and public
expenditure system may widen the inequality of disposable income. Following this literature,
we include Local Tax rates, Tax Progressivity, state Earned Income Tax Credit and Local
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government expenditures per capita. Local Tax rates reflect total tax revenues per capita
divided by mean household income per capita for working age adults in 1992. Tax
Progressivity is the difference between the state income tax rate for incomes above $100,000
and incomes in the bottom tax income bracket in 2008, whereas the state Earned Income
Tax Credit is the the mean state Earned Income Tax Credit top-up rate between 1980-2001,
with the rate coded as zero for states with no state Earned Income Tax Credit. Furthermore,
government expenditures per capita are the total local government expenditures per capita
in 1992. Chetty et al.(2014) find that commuting zones that provide more public goods and
with larger tax credits for low income families tend to have higher levels or intergenerational
mobility.
We examine further the effect of local public goods on intergenerational mobility by
considering also the role of school quality (Card and Krueger (1992), Hanushek (2003)). In
particular, we include the School Expenditure per Student which is the average expenditures
per student in public schools, the High School Dropout Rate which is the residual from a
regression of high school dropout rates on household income per capita in 2000, the Student-
Teacher Ratio which is the average student-teacher ratio in public schools in 1996-1997
and the Test Score Percentile which is the residual from a regression of mean Math and
English test scores (in 2004, 2005 and 2007) appropriately standardized using the household
income per capita in 2000. The first three variables are from the National Center for
Education Statistics, whereas the test score Percentile is from the Global Report Card.
As expected, Chetty et al.(2014) show that upward mobility is positively associated with
School Expenditure per Student and the Test Score Percentile, but negatively with High
School Dropout Rate and the Student-Teacher Ratio.
Since the quality of local schools appears significant we extend the analysis considering
the role of higher education. Specifically, we include the Number of Colleges per Capita in
2000, the College Tuition level which is the mean in-state tuition and fees for first-time, full-
time undergraduates in 2000 and finally, the College Graduation Rate which is the residual
from a regression of graduation rate in 2009. All variables are calculated using data from the
Integrated Postsecondary Education Data System (IPEDS). Chetty et al.(2014) find that
Colleges per Capita and College Graduation Rate affect positively upward mobility but the
College Tuition level, negatively. However, the effect of these variables is rather small and
insignificant.
Following the literature we also consider the effect of the local labor market structure on
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income distribution by including the Labor Force Participation which is the share of people at
least 16 years old that are in the labor force and the Share Working in Manufacturing which
is the Share of employed persons 16 and older working in manufacturing. Both variables are
from 2000 Census. Furthermore, we include the Growth in Chinese Imports which is the
share of growth in imports from China per worker between 1990 and 2000 from Autor et
al. (2013) and the Teenage Labor Force Participation which is the share of children born
between 1985-1987 who received a W2 when they were age 14-16, computed from the 2000
Census. Chetty et al.(2014) identify a rather weak association with upward mobility for all
the variables apart from the Teenage Labor Force Participation which exhibits a positive
relationship.
A number of papers in the literature suggest also a connection between immigration
rates and labor market outcomes (Altonji and Card, 1989). In our analysis migration is
measured using the Migration Inflow and Outlflow Rate which is the migration in to the
commuting zone and out of the commuting zone respectively, between 2004 and 2005. Both
variables are based on data from the IRS Statistics of Income. In addition, we include the
Fraction of Foreign Born which is the share of commuting zone residents born outside the
United States based on data from the 2000 Census. Chetty et al.(2014) find a negative, yet,
small and insignificant connection between all the migration variables and upward mobility.
Another important factor that affects social as well as economic outcomes is the presence
of social capital which reflects the level of social networks. To consider the role of the
social capital we include three variables: First, we include the Social Capital Index taken
from Rupasingha and Goetz (2008), which is a standardized index combining measures of
voter turnout rates, the fraction of people who return their census forms, and measures of
participation in community organizations in 1990. Second, we also consider the Religious
Fraction which is the share of religious adherents in 2000 based on data from the Association
of Religion Data Archives. Third, we include the Violent Crime Rate which reflects the
number of arrests for serious violent crimes per capita in 2000 based on the FBI’s Uniform
Crime Reports. Notably, as Chetty et al.(2014) document, the Social Capital Index and
Religiosity are strongly and positively associated with upward mobility, whereas the Violent
Crime Rate negatively.
Many scholars have also emphasize the importance of the family environment on
children’s outcomes (Becker, 1991). In order to examine this possibility we include the
Fraction of Children with Single Mothers which is the number of single female households
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with children divided by the total number of households with children, the Fraction of
Adults Divorced which is the Fraction of people 15 or older who are divorced, and the
Fraction of Adults Married which is the share of people 15 or older who are married and not
separated. All variables are from the 2000 Census and according to Chetty et al.(2014) there
is a significant negative relationship between the Fraction of Children with Single Mothers,
the Fraction of Adults Divorced and upward mobility, but the effect of Fraction of Adults
Married, is positive.
The relationship between innovation and social mobility has never been examined in the
literature until recently from Aghion et al.(2016). In particular, using data at the commuting
zone level they find that innovation is positively correlated with upward social mobility driven
mostly by entrant innovators and less so by incumbent innovators, and it is dampened in
states with higher lobbying intensity. Following Aghion et al.(2016), we proxy innovation
using the average Utility Patents per capita over the period 2006-2010. In particular, using
zip code level data from Lai et al. (2013) based on the Patent Inventor Database, we assigned
each inventor to a county, and finally, to a commuting zone.
Finally, following Aghion et al.(2016) we include population growth over the period
2006-2010 from the Bureau of Economic Analysis (BEA) which was initially available at
the county level and we grouped into commuting zones. Aghion et al.(2016) show that
population growth affects positively and strongly upward mobility.
One of the most important contributions of this paper is not only to uncover empirically
robust determinants of upward mobility but also, to examine if the same set of theories
simultaneously affect income inequality focusing particularly on the role of upward mobility.
In particular, for each commuting zone i we assume that income inequality is determined by
the following linear regression model,
Inequalityi = b+ z′iδ + ui (2.3)
where b is an intercept, zi is a p × 1 vector of income inequality determinants and ui is an
i.i.d. error term for i = 1, 2, ..., n.
Income inequality is measured using the Gini coefficient of parent income within each
commuting zone from Census Bureau calculated over the period 2010-2014, and the Top
1% Income Share, which is the fraction of income going to the top 1% defined within the
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commuting zone in 2013, from the Economic Policy Institute. Both variables were initially
available at the county level which we have grouped into commuting zones. In this model we
essentially extend the work of Aghion et al.(2016) in two key directions: First, we consider
a larger set of determinants (Segregation, Income, Tax, Education, College, Labor Market,
Migration, Social Capital, Family Structure, Innovation and Population Growth) and second,
we pay particular attention to the role of absolute upward mobility. Aghion et al.(2016) find
a positive effect of innovation and income on income inequality (Top 1% Income Share
and Gini coefficient) but a negative impact of labor force participation, school expenditure,
college per capita and employment manufacturing.
Table 1 presents summary statistics while a detailed description of the data and the
related sources is given in Table A1.
3 The Threshold Intergenerational Mobility and
Income Inequality Models
One of the main objectives of this paper is to identify robust determinants of Absolute
Upward Mobility and Income inequality taking into account the presence of parameter
heterogeneity by estimating the threshold intergenerational mobility and income inequality
models.
The threshold intergenerational mobility and income inequality models generalize the
linear models in (2.1) and (2.3) respectively, by allowing for the presence of multiple regimes.
In particular, we employ the threshold regression model that sorts the data into two groups
of observations based on a particular threshold variable qi. An important feature of this
model is that it allows for an estimation of the threshold parameter (sample split) as well
as the regression coefficients of the two regimes. The threshold intergenerational mobility
model can be described by the following regression equations
Mobilityi = α1 + x′iβ1 + ei, qi ≤ γ (3.4a)
Mobilityi = α2 + x′iβ2 + ei, qi > γ (3.4b)
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Similarly, the threshold income inequality model can be defined as follows
Inequalityi = b1 + z′iδ1 + ui, qi ≤ γ (3.5a)
Inequalityi = b2 + z′iδ2 + ui, qi > γ (3.5b)
where γ is the scalar threshold parameter or sample split value and (α′1, α
′2)
′, (b′1, b′2)
′,
(β′1, β
′2)
′ and (δ′1, δ′2)
′, are the vectors of the regression coefficients (constant and slope) for
the low and high regime, respectively.
The statistical theory for this problem is provided by Hansen (2000) who proposed
a concentrated least squares method for the estimation of the threshold parameter.
The regression coefficients for the two regimes are obtained using LS on the two sub-
samples, separately. Under certain assumptions the asymptotic distribution of the threshold
parameter γ is nonstandard as it involves two independent Brownian motions. Finally, the
confidence intervals for γ are obtained by an inverted likelihood ratio approach.
Estimation of the threshold intergenerational mobility model requires decisions on the
choice of the threshold variable qi. Chetty et al.(2014) show that Income Inequality and
Racial Segregation exhibit a strong and robust correlation with intergenerational mobility.
Therefore, we consider Income Inequality( Gini over the period 2006-2010 or Top 1% in 2010)
and Racial Segregation in 2000, as candidate threshold variables. Also, based on the recent
significant empirical findings of Aghion et al.(2015) regarding the impact of innovation on
upward mobility, we include the Average Patents per capita over the period 2006-2010.
Hassler et al. (2003) suggest that inequality creates incentives to become skilled, and
consequently, has a significant positive effect on upward mobility. Therefore, to test for
this particular theory we include School expenditure per student over the period 1996-97, as
an additional threshold variable. We examine also the effect of income and consider Income
Segregation in 2000 and Household Income per capita (2006-2010). For the estimation of
the threshold income inequality model we consider the same set of threshold variables apart
from the income inequality measures which are appropriately substituted by the Absolute
Upward Mobility.
In practise, we test the null hypothesis of a linear model against the alternative of a
threshold and discard threshold variables that do not reject the null of the linear model at
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10%. We do so by employing the heteroskedasticity-consistent Lagrange multiplier (LM)
test for a threshold of Hansen (1996). It is worth noting that inference in this context is
not standard since the threshold parameter, γ, is not identified under the null hypothesis
of a linear model (i.e. no threshold effect), and therefore the p-values are computed by a
bootstrap method.
4 Results
Table 2 shows the results of the threshold test for Absolute Upward Mobility. The table
includes four different model specifications: The first and the second are the baseline models
where the set of the explanatory variables include Gini (2006-2010) or Top 1% in 2010,
Patents (2006-2010) and Income (2006-2010). In the third and fourth model we include
the full set of the explanatory variables. The first column in Table 2 shows the threshold
variable under consideration, then the corresponding P-value for the null hypothesis of a
linear model against the alternative of a threshold, the threshold estimate, the confidence
interval for the threshold parameter,the joint sum of squares (JSSE), and the sample sizes of
the two regimes. According to the results, for almost all the models (apart from one case),
the linear model null hypothesis is strongly rejected. Tables 4 and 5 show the estimation
results (baseline and extended) for the best model in terms of joint sum of squares (JSSE).
Table 3 shows the threshold test for Income Inequality. As previously, we consider four
different model specifications. In the first and the second which are the baseline models, the
set of the explanatory variables includes Absolute upward mobility, Patents (2006-2010) and
Income (2006-2010). The dependent variable in the first model is Gini (2010-2014) and in
the second, Top 1% in 2013. In the third and fourth model we include the full set of the
explanatory variables. Notably, the null hypothesis for almost all the models (apart from
seven cases) is strongly rejected. Tables 6 and 7 show the estimation results (baseline and
extended) for the best model in terms of joint sum of squares (JSSE).
To be completed....
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5 Robustness
To test the robustness of our results we estimate four different model variations. Fist, we
consider an alternative income variable. In particular, we substitute income per capita over
the period 2006-2010 from BEA (Bureau of Economic Analysis) with Household Income Per
Capita in 2000 from Chetty et al. (2014). Tables 2 and 4 in the Appendix present the
results from the estimation of the corresponding threshold regression models for Absolute
Upward Mobility and Income Inequality, respectively. As expected, the results for the
baseline models, as well as, for the extended models, remain robust. Second, we extend
the set of the explanatory variables by including also the Student-Teacher Ratio and High
School Dropout Rate for Education, College Tuition, College Graduation Rate and Number
of Colleges per Capita for College, and finally, Violent Crime Rate for Social Capital. The
addition of these variables has reduced the number of the observations from 686 to 417
and as expected, we have chosen to exclude them from the initial regressors set. Notably,
the threshold regression model results remain robust for both, Absolute Upward Mobility
and Income Inequality (Table 3 and 5, respectively in the Appendix). Third, we consider
alternative intergenerational mobility variables. In particular, we consider Relative Mobility
and Absolute Upward Mobility based on college enrollments. Relative Mobility measures the
difference in income between the expected ranks of children born to parents at the top and
bottom of the income distribution within a commuting zone. Given that there is a strong
association between higher education and subsequent earnings we include Absolute Upward
Mobility based on OLS regressions of an indicator for being enrolled in college at age 19
on parent income rank in 1996-2000 from Chetty et al. (2014). Finally, for the first time,
we estimate and examine the role of Net Gini at the commuting zone level, instead of the
typical market (gross) Gini. Specifically, we calculate Net Gini using pre-tax, pre-transfer
and after-tax, after-transfer income using data from the US Census Bureau.
To be completed....
6 Conclusion
To be completed.
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Table 1: Descriptive StatisticsVariable Obs Mean Std. Dev. Min MaxIntergenerational MobilityAbsolute Upward Mobility 686 43.9900 5.6418 26.6717 64.0192Income Inequality and IncomeGini Coefficient, 2006-2010 686 0.4328 0.0262 0.3527 0.5535Gini Coefficient, 2010-2014 686 0.4416 0.0244 0.3727 0.5471Top1% Income Share, 2010 686 12.8958 4.0048 7.4000 48.8000Top1% Income Share, 2013 686 12.9011 3.5696 7.5000 41.5000Income Per Capita 686 11.6901 0.5786 9.8947 13.6091Household Income Per Capita 686 32728.1 5582.1 17378.6 58628.4InnovationPatents per capita 686 0.0610 0.0946 0.0000 1.2673OtherPopulation Growth 686 -2.9038 0.1481 -3.4146 -2.4522SegregationFraction Black 686 0.0825 0.1250 0.0002 0.6583Racial Segregation 686 0.1358 0.0993 0.0000 0.5537Income Segregation 686 0.0410 0.0315 0.0000 0.1379Fraction with Commute < 15 Mins 686 0.4426 0.1300 0.1561 0.7666TaxLocal Tax Rate 686 0.0229 0.0092 0.0081 0.0823Local Govt Expenditures Per Capita 686 2236.3 822.4 952.2 11529.1Tax Progressivity 686 0.7791 1.4542 0.0000 6.3000State EITC Exposure 686 1.3877 3.9137 0.0000 21.3333EducationSchool Expenditure per Student 686 5.9527 1.1147 3.9202 11.9063Test Score Percentile (Income adjusted) 686 0.1823 7.9598 -31.8367 20.0705Student Teacher Ratio 417 16.4594 1.7613 10.6852 23.3418High School Dropout Rate (Income adjusted) 417 0.0017 0.0195 -0.0338 0.0993CollegeNumber of Colleges per Capita 417 0.0239 0.0204 0.0044 0.2432College Tuition 417 4123.9 3716.1 0.0000 24619College Graduation Rate (Income Adjusted) 417 -0.0021 0.1311 -0.2770 0.4734Labor MarketLabor Force Participation 686 0.6141 0.0586 0.3641 0.7818Share Working in Manufacturing 686 0.1474 0.0806 0.0085 0.4370Growth in Chinese Imports 686 1.2222 1.8127 -0.0027 25.4053Teenage (14-16) Labor Force Participation 686 0.0048 0.0014 0.0017 0.0081MigrationMigration Inflow Rate 686 0.0168 0.0104 0.0000 0.0770Migration Outlflow Rate 686 0.0168 0.0075 0.0033 0.0525Fraction Foreign Born 686 0.0405 0.0496 0.0034 0.3968Social CapitalSocial Capital Index 686 0.0980 1.2151 -3.1990 5.2660Fraction Religious 686 0.5450 0.1577 0.1715 1.0490Violent Crime Rate 417 0.0016 0.0009 0.0000 0.0050Family StructureFraction of Children with Single Mothers 686 0.2048 0.0519 0.0821 0.4337Fraction of Adults Divorced 686 0.0971 0.0170 0.0395 0.1562Fraction of Adults Married 686 0.5739 0.0448 0.3729 0.6947
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Table 2: Threshold Tests and Threshold Estimates-Absolute Upward Mobility
Threshold variable p-value Threshold 95% CI jsse n1 n2
Model 1Gini 0610 0.5252 0.4095 [0.409000, 0.457875] 16992 105 581Patents per capita 2006 to 2010 0.0020 0.0182 [0.010400, 0.026700] 16238 193 493Income pc 2006 to 2010 0.0004 122876 66028.60, 125878.00] 16584 353 333Income segregation 0.0000 0.0177 [0.016920, 0.019647] 14132 191 495Racial segregation 0.0000 0.0718 [0.043901, 0.098412] 14712 202 484School expenditure per student 0.0000 6.2566 [5.912070, 6.914530] 16253 456 230
Model 2Top 1% in 2010 0.0050 15.2000 [11.43300, 15.20000] 20811 583 103Patents per capita 2006 to 2010 0.0242 0.0104 [0.010400, 0.048800] 20333 102 584Income pc 2006 to 2010 0.0000 107261 [66028.60, 200433.00] 20539 283 403Income segregation 0.0000 0.0177 [0.017511, 0.019578] 17575 191 495Racial segregation 0.0000 0.0718 [0.048758, 0.098412] 17528 202 484School expenditure per student 0.0000 6.2566 [5.917000, 6.291440] 19390 456 230
Model 3Gini 0610 0.0000 0.4483 [0.448000, 0.448333] 2636 506 180Patents per capita 2006 to 2010 0.0000 0.0246 [0.010400, 0.075100] 2740 269 417Income pc 2006 to 2010 0.0006 110864 [97554.80, 112356.00] 2743 309 377Income segregation 0.0000 0.0196 [0.019634, 0.019634] 2559 217 469Racial segregation 0.0028 0.0576 [0.040798, 0.098412] 2731 153 533School expenditure per student 0.0000 6.4154 [6.242820, 6.537840] 2730 485 201
Model 4Top 1% in 2010 0.0004 11.5750 [11.30000, 12.43300] 2678 278 408Patents per capita 2006 to 2010 0.0002 0.0246 [0.010400, 0.076100] 2708 269 417Income pc 2006 to 2010 0.0010 110864 [93689.00, 112356.00] 2721 309 377Income segregation 0.0000 0.0196 [0.019634, 0.019647] 2546 217 469Racial segregation 0.0028 0.0424 [0.042421, 0.057609] 2690 107 579School expenditure per student 0.0000 6.4154 [6.256320, 6.573410] 2679 485 201
13
Table 3: Threshold Tests and Threshold Estimates-Income Inequality
Threshold variable p-value Threshold 95% CI jsse n1 n2
Model 1Absolute upward mobility 0.0000 49.1870 [45.9863, 50.2682] 0.313 566 120Patents per capita 2006 to 2010 0.0000 0.0293 [0.021200, 0.071300] 0.317 304 382Income pc 2006 to 2010 0.1036 67968 [66028.60, 69845.80] 0.330 107 579Income segregation 0.0182 0.0118 [0.011547, 0.012073] 0.333 117 569Racial segregation 0.0338 0.0427 [0.040798, 0.043901] 0.331 109 577School expenditure per student 0.0000 6.8957 [4.825330, 6.961240] 0.326 573 113
Model 2Absolute upward mobility 0.4882 39.5395 [39.41620, 40.38380] 7789 160 526Patents per capita 2006 to 2010 0.1308 0.0218 [0.021200, 0.021800] 8214 235 451Income pc 2006 to 2010 0.4690 69965 [66028.60, 73729.00] 7951 119 567Income segregation 0.0008 0.0326 [0.032628, 0.039053] 8040 343 343Racial segregation 0.2586 0.0416 [0.040798, 0.044338] 7399 105 581School expenditure per student 0.0116 6.8384 [4.825330, 6.961240] 8213 561 125
Model 3Absolute upward mobility 0.0000 43.3440 [38.20230, 43.63400] 0.173 343 343Patents per capita 2006 to 2010 0.0084 0.0397 [0.010400, 0.054800] 0.185 380 306Income pc 2006 to 2010 0.0026 69817 [66028.60, 72868.80] 0.181 116 570Income segregation 0.0058 0.0112 [0.011207, 0.011207] 0.186 104 582Racial segregation 0.0084 0.0409 [0.040798, 0.040931] 0.183 103 583School expenditure per student 0.0002 6.6602 [6.299380, 6.736560] 0.182 536 150
Model 4Absolute upward mobility 0.0666 39.5080 [38.20230, 43.73000] 5336 159 527Patents per capita 2006 to 2010 0.0326 0.0766 [0.076300, 0.077900] 5358 534 152Income pc 2006 to 2010 0.4042 66106 [66028.60, 73729.00] 5507 103 583Income segregation 0.1878 0.0200 [0.019927, 0.055541] 5468 225 461Racial segregation 0.0150 0.0409 [0.040931, 0.040963] 4977 103 583School expenditure per student 0.0186 6.7442 [6.291440, 6.744160] 5594 551 135
14
Table
4:Thresh
old
Regression-M
obility
Method
Lin
ear
Threshold
Lin
ear
Threshold
Expla
natory
Varia
ble
sLow
Hig
hLow
Hig
hcoef
se
coef
se
coef
se
coef
se
coef
se
coef
se
Constant
110.626
5.2114
61.6280
11.3690
100.596
5.7035
60.2662
5.9291
68.1596
9.4802
59.1372
6.7069
Gin
i2006-2
010
-95.3878
7.4978
-106.086
14.3046
-78.4358
7.9619
-6.4706
4.8044
-6.4093
7.3467
-11.0102
5.4193
Pate
nts
pc2006-2
010
-1.0243
1.9790
4.6217
4.7609
2.0540
1.3461
-1.5536
1.0118
1.4156
1.8291
-1.4158
0.8214
Log
Incom
epc2006-2
010
-2.1634
0.3089
2.7648
0.8001
-2.0409
0.3152
0.3448
0.2402
0.1512
0.4099
0.3921
0.2540
Pop
gro
wth
2006-2
010
--
--
--
0.6952
1.0424
2.8438
1.5997
0.6789
1.0962
Fra
ction
Black
--
--
--
4.0843
1.8749
5.3749
2.9459
3.6460
1.9819
RacialSegre
gation
--
--
--
-4.7702
1.4527
-2.1136
1.9455
-7.0292
1.5367
IncomeSegre
gation
--
--
--
-3.0599
5.8379
97.6600
41.5476
-5.9546
5.8675
Fra
ction
with
Com
mute
<15
Min
s-
--
--
-8.8429
1.7209
11.8481
3.7307
8.7533
1.6705
LocalTax
Rate
--
--
--
-5.8994
18.0674
-22.4060
29.5009
41.6731
17.8085
LocalGovtExpenditure
sPerCapita
--
--
--
0.0003
0.0001
0.0002
0.0002
0.0001
0.0001
Tax
Pro
gre
ssivity
--
--
--
0.4407
0.0720
0.9525
0.1730
0.2010
0.0634
Sta
teEIT
CExposu
re-
--
--
-0.0350
0.0247
0.0389
0.0445
0.0329
0.0284
SchoolExpenditure
perStu
dent
--
--
--
0.0343
0.1190
0.0811
0.1975
-0.0315
0.1134
Test
Score
Perc
entile
--
--
--
0.0469
0.0182
0.0702
0.0349
0.0215
0.0168
LaborForc
eParticip
ation
--
--
--
-7.0825
3.3462
1.6515
5.9707
-9.0881
3.4592
Share
Work
ing
inM
anufactu
ring
--
--
--
-10.3421
1.4859
-11.4605
2.8984
-9.3352
1.7474
Gro
wth
inChin
ese
Imports
--
--
--
-0.0651
0.0395
-0.0603
0.0883
-0.0366
0.0346
Teenage(1
4-1
6)LaborForc
eParticip
ation
--
--
--
160.176
148.942
-79.3435
253.526
201.191
154.830
Migra
tion
Inflow
Rate
--
--
--
-47.1043
15.5859
-167.184
55.8257
-17.4162
16.7853
Migra
tion
Outlflow
Rate
--
--
--
43.1477
23.1019
136.783
62.2070
22.2681
22.7381
Fra
ction
Fore
ign
Born
--
--
--
4.3117
3.0329
-21.5785
6.9729
12.7259
2.6777
SocialCapitalIn
dex
--
--
--
0.6102
0.1689
-0.0268
0.2819
0.9943
0.1908
Fra
ction
Religious
--
--
--
5.5015
0.7998
4.0006
1.2299
6.5722
0.8645
Fra
ction
ofChildre
nwith
Sin
gle
Moth
ers
--
--
--
-56.8699
6.1430
-68.6856
9.0326
-46.3095
6.4592
Fra
ction
ofAdultsDivorc
ed
--
--
--
-27.2714
8.7532
-39.7041
15.5133
-15.6322
9.1734
Fra
ction
ofAdultsM
arried
--
--
--
-6.4471
3.9581
-7.8915
6.6144
-7.6119
4.3023
15
Table
5:Thresh
old
Regression-M
obility
Method
Lin
ear
Threshold
Lin
ear
Threshold
Expla
natory
Varia
ble
sLow
Hig
hLow
Hig
hcoef
se
coef
se
coef
se
coef
se
coef
se
coef
se
Constant
61.1051
3.8542
30.1204
7.2497
51.9952
4.6401
53.9019
5.2285
62.9338
8.4509
50.4429
5.9244
Top
1%
in2010
0.0319
0.0693
-0.0020
0.0679
0.0407
0.0872
0.0852
0.0290
0.0889
0.0399
0.0305
0.0234
Pate
nts
pc2006-2
010
1.3912
2.0414
-9.4181
2.8440
5.4985
2.3737
-2.2725
1.1200
0.0898
2.3192
-1.7483
0.8579
Log
Incom
epc2006-2
010
-1.5065
0.3193
1.5789
0.6521
-0.8826
0.3824
0.3526
0.2366
0.1731
0.4087
0.4479
0.2516
Pop
gro
wth
2006-2
010
--
--
--
0.4936
1.0048
2.3207
1.6090
0.6869
1.1103
Fra
ction
Black
--
--
--
3.6989
1.8127
5.4211
2.9455
3.2288
1.9880
RacialSegre
gation
--
--
--
-4.5771
1.3800
-2.3974
1.8268
-6.6395
1.5126
IncomeSegre
gation
--
--
--
-0.4931
5.6247
90.3556
41.5973
-3.6162
6.1722
Fra
ction
with
Com
mute
<15
Min
s-
--
--
-9.3562
1.6992
11.3699
3.6723
9.3606
1.6918
LocalTax
Rate
--
--
--
-9.9094
18.0334
-24.8446
29.3026
41.7985
18.3781
LocalGovtExpenditure
sPerCapita
--
--
--
0.0003
0.0001
0.0002
0.0001
0.0001
0.0001
Tax
Pro
gre
ssivity
--
--
--
0.4598
0.0715
0.9650
0.1641
0.2155
0.0638
Sta
teEIT
CExposu
re-
--
--
-0.0396
0.0246
0.0364
0.0457
0.0396
0.0282
SchoolExpenditure
perStu
dent
--
--
--
0.0365
0.1160
0.0973
0.1956
-0.0224
0.1157
Test
Score
Perc
entile
--
--
--
0.0432
0.0176
0.0623
0.0336
0.0195
0.0171
LaborForc
eParticip
ation
--
--
--
-4.7721
3.3125
3.2937
5.8979
-7.0147
3.5345
Share
Work
ing
inM
anufactu
ring
--
--
--
-9.6365
1.4650
-10.9526
2.8536
-8.5413
1.7081
Gro
wth
inChin
ese
Imports
--
--
--
-0.0628
0.0406
-0.0450
0.0852
-0.0439
0.0361
Teenage(1
4-1
6)LaborForc
eParticip
ation
--
--
--
177.788
147.793
-7.8516
249.996
210.899
156.658
Migra
tion
Inflow
Rate
--
--
--
-49.0498
15.0470
-174.312
54.6847
-17.5002
16.7235
Migra
tion
Outlflow
Rate
--
--
--
41.6486
22.4400
141.193
58.3505
25.2808
22.5196
Fra
ction
Fore
ign
Born
--
--
--
2.0066
2.9787
-22.0337
6.9206
11.0019
2.7966
SocialCapitalIn
dex
--
--
--
0.5380
0.1710
-0.0503
0.2728
0.9795
0.1953
Fra
ction
Religious
--
--
--
5.1345
0.7927
3.7306
1.2238
6.2644
0.8903
Fra
ction
ofChildre
nwith
Sin
gle
Moth
ers
--
--
--
-58.0281
6.0207
-71.1501
8.8644
-46.9550
6.5387
Fra
ction
ofAdultsDivorc
ed
--
--
--
-29.6506
8.6542
-40.5404
15.4205
-16.4598
9.1840
Fra
ction
ofAdultsM
arried
--
--
--
-5.0718
4.0183
-9.3451
6.5218
-5.0795
4.5130
16
Table
6:Thresh
old
Regression-Inequality
Method
Lin
ear
Threshold
Lin
ear
Threshold
Expla
natory
Varia
ble
sLow
Hig
hLow
Hig
hcoef
se
coef
se
coef
se
coef
se
coef
se
coef
se
Constant
0.6113
0.0235
0.6875
0.0270
0.2713
0.0722
0.6701
0.0535
0.7511
0.0741
0.5622
0.0695
Abso
lute
upward
mobility
-0.0016
0.0002
-0.0026
0.0003
0.0021
0.0006
-0.0001
0.0004
-0.0013
0.0007
0.0011
0.0005
Pate
nts
pc2006-2
010
-0.0192
0.0113
-0.0069
0.0107
-0.0423
0.0222
0.0241
0.0100
0.0552
0.0194
0.0085
0.0075
Log
Incom
epc2006-2
010
-0.0086
0.0017
-0.0114
0.0018
0.0042
0.0053
-0.0030
0.0017
-0.0078
0.0022
0.0002
0.0025
Pop
gro
wth
2006-2
010
--
--
--
0.0022
0.0079
0.0113
0.0113
-0.0142
0.0099
Fra
ction
Black
--
--
--
0.0133
0.0164
0.0115
0.0235
0.0238
0.0415
RacialSegre
gation
--
--
--
-0.0096
0.0109
-0.0099
0.0143
-0.0147
0.0138
Incom
eSegre
gation
--
--
--
-0.1305
0.0502
-0.0452
0.0660
-0.1508
0.0774
Fra
ction
with
Com
mute
<15
Min
s-
--
--
--0
.0201
0.0136
-0.0027
0.0224
-0.0392
0.0180
LocalTax
Rate
--
--
--
-0.0001
0.1077
0.0341
0.1600
0.1599
0.1399
LocalGovtExpenditure
sPerCapita
--
--
--
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
Tax
Pro
gre
ssivity
--
--
--
0.0005
0.0005
0.0000
0.0006
0.0003
0.0008
Sta
teEIT
CExposu
re-
--
--
--0
.0004
0.0002
-0.0002
0.0005
-0.0001
0.0002
SchoolExpenditure
perStu
dent
--
--
--
-0.0019
0.0009
0.0012
0.0014
-0.0035
0.0011
Test
Score
Perc
entile
--
--
--
0.0003
0.0002
0.0001
0.0002
0.0005
0.0002
LaborForc
eParticip
ation
--
--
--
-0.1144
0.0300
-0.1468
0.0411
-0.1166
0.0390
Share
Work
ing
inM
anufactu
ring
--
--
--
-0.0546
0.0137
-0.0417
0.0175
-0.0903
0.0185
Gro
wth
inChin
ese
Imports
--
--
--
0.0005
0.0004
0.0009
0.0005
-0.0003
0.0004
Teenage(1
4-1
6)LaborForc
eParticip
ation
--
--
--
-4.1451
1.2461
-4.8029
1.8429
-4.3283
1.5859
Migra
tion
Inflow
Rate
--
--
--
0.0248
0.1646
-0.0102
0.2134
-0.0704
0.2062
Migra
tion
Outlflow
Rate
--
--
--
-0.2189
0.2233
-0.4469
0.2724
0.3396
0.3234
Fra
ction
Fore
ign
Born
--
--
--
0.0752
0.0227
0.0817
0.0319
0.0929
0.0296
SocialCapitalIn
dex
--
--
--
0.0011
0.0014
-0.0019
0.0018
0.0039
0.0016
Fra
ction
Religious
--
--
--
0.0217
0.0074
0.0320
0.0109
0.0065
0.0105
Fra
ction
ofChildre
nwith
Sin
gle
Moth
ers
--
--
--
0.0857
0.0535
0.0424
0.0709
0.1753
0.0757
Fra
ction
ofAdultsDivorc
ed
--
--
--
-0.0889
0.0805
-0.0431
0.0961
-0.1572
0.1199
Fra
ction
ofAdultsM
arried
--
--
--
-0.1385
0.0374
-0.0571
0.0487
-0.1763
0.0470
17
Table
7:Thresh
old
Regression-Inequality
Method
Lin
ear
Threshold
Lin
ear
Threshold
Expla
natory
Varia
ble
sLow
Hig
hLow
Hig
hcoef
se
coef
se
coef
se
coef
se
coef
se
coef
se
Constant
16.3200
4.2440
24.6188
6.4560
10.8462
4.6561
13.4155
8.6791
27.6294
22.2682
7.1542
8.5691
Abso
lute
upward
mobility
0.0074
0.0226
0.0115
0.0278
0.0568
0.0379
0.1312
0.0576
0.1804
0.1508
0.1268
0.0541
Pate
nts
pc2006-2
010
7.6538
3.1354
19.5183
12.1732
3.0937
1.3573
8.0730
3.5641
43.0998
4.2180
3.7692
1.4022
Log
Incom
epc2006-2
010
-0.3604
0.3269
-1.1606
0.5399
-0.0248
0.3210
-0.0320
0.2944
-0.0904
0.8020
-0.1281
0.3364
Pop
gro
wth
2006-2
010
--
--
--
2.2824
1.6658
6.0764
3.7765
-0.1557
1.4721
Fra
ction
Black
--
--
--
3.4500
2.8128
-9.5692
5.9087
4.9925
3.0854
RacialSegre
gation
--
--
--
-1.8195
1.7255
-4.9614
34.6479
-1.3205
1.8396
IncomeSegre
gation
--
--
--
-13.3960
10.9313
14.8334
33.2060
0.2127
8.0801
Fra
ction
with
Com
mute
<15
Min
s-
--
--
--4
.6089
2.6927
-10.7967
4.4698
-2.9263
2.2317
LocalTax
Rate
--
--
--
81.9209
24.5189
21.5393
31.6392
71.4073
32.2345
LocalGovtExpenditure
sPerCapita
--
--
--
0.0001
0.0002
0.0003
0.0005
0.0000
0.0002
Tax
Pro
gre
ssivity
--
--
--
-0.2365
0.1122
-0.8482
0.3215
-0.0803
0.0812
Sta
teEIT
CExposu
re-
--
--
--0
.0694
0.0350
-0.0043
0.0959
-0.0541
0.0349
SchoolExpenditure
perStu
dent
--
--
--
0.0144
0.1744
0.3956
0.3411
0.0761
0.1798
Test
Score
Perc
entile
--
--
--
0.0445
0.0561
-0.0922
0.0936
0.1050
0.0317
LaborForc
eParticip
ation
--
--
--
-14.8224
5.5380
-8.4308
8.8990
-16.9481
5.8830
Share
Work
ing
inM
anufactu
ring
--
--
--
-2.1426
2.2088
-4.7397
4.8839
-0.8186
2.1037
Gro
wth
inChin
ese
Imports
--
--
--
-0.0779
0.0501
-0.0194
0.0564
-0.0482
0.0537
Teenage(1
4-1
6)LaborForc
eParticip
ation
--
--
--
-34.2222
190.412
330.485
371.104
-53.6701
205.742
Migra
tion
Inflow
Rate
--
--
--
48.0218
39.9880
-29.0418
36.8995
77.9208
41.7167
Migra
tion
Outlflow
Rate
--
--
--
8.3511
44.6641
-45.0542
77.1523
-16.0091
43.4039
Fra
ction
Fore
ign
Born
--
--
--
23.4226
5.6391
40.7644
21.6010
24.3300
5.8336
SocialCapitalIn
dex
--
--
--
0.7165
0.3535
0.9867
0.5284
0.3347
0.2346
Fra
ction
Religious
--
--
--
3.5180
1.3783
-0.2544
2.3380
5.4962
1.4316
Fra
ction
ofChildre
nwith
Sin
gle
Moth
ers
--
--
--
15.9159
8.8515
36.8832
16.5659
10.7065
9.4613
Fra
ction
ofAdultsDivorc
ed
--
--
--
43.8581
14.6365
-45.3262
30.0733
48.4406
16.8527
Fra
ction
ofAdultsM
arried
--
--
--
-1.4617
5.7350
-2.4695
11.0014
-1.8589
5.7339
18
References
19
Table
A1:Data
Appendix
Variable
Description
Interg
enera
tionalM
obility
Absolute
UpwardMob
ility
Theexpectedchildrankof
childrenbornto
aparentwhosenational
incomerankispin
commuting
zonei.
Absolute
Upward
Mob
ility
isspecically
focu
sed
onchildren
from
familieswith
below
med
ianparentincome.
Parentan
dchildincomeiscalculatedusingdatafrom
1040
federal
income
taxrecordsfrom
theIR
SDatab
ankan
dthebaselinean
alysisis
focu
sedon
the19
80-1982birth
cohorts.Thechildren’sincomeisdefi
ned
asthemeantotalfamilyincomein
2011
and2012,when
they
areap
proxim
ately30
years
oldan
dthetheirparents’incomeis
defi
ned
asthemeanfamily
incomebetween19
96an
d20
00,when
thechildrenarebetweentheag
esof
15an
d20
.Sou
rce:
Chetty
etal.(20
14).
IncomeIn
equality
and
Income
GiniCoeffi
cient
TheGinicoeffi
cientof
parentincomewithin
each
commutingzonecalculatedover
theperiod2006-
2010
and20
10-201
4.Thevariab
lewas
initiallyavailableat
thecounty
levelwhichwehavecarefully
grou
ped
into
commutingzones.Sou
rce:
Cen
susBureau
.Top
1%
IncomeShare
TheTop
1%IncomeShare,
whichisthefraction
ofincomego
ingto
thetop1%
defi
ned
within
the
commutingzonein
2010
andin
2013
.Thevariab
lewas
initiallyavailable
atthecounty
level
which
wehavecarefullygrou
ped
into
commutingzones.Sou
rce:
Econom
icPolicyInstitute.
IncomePer
Cap
ita
Incomeper
Cap
itafortheperiod20
06-201
0,initiallyavailable
atthecounty
level
whichwehave
carefullygrou
ped
into
commutingzones.Sou
rce:
Bureau
ofEconom
icAnalysis.
Hou
seholdIncomePer
Cap
ita
Meanlevel
ofHou
seholdIncomeper
Cap
itaforworking-ag
ead
ultsin
acommutingzonemeasured
inthe20
00Cen
sus.
Sou
rce:
Chetty
etal.(201
4).
Innovation
Patents
per
capita
Patents
per
capitaover
theperiod20
06-201
0,usingzipcodelevel
datawhichwefirstpairthem
toacounty,an
dfinally,to
acommutingzone.
Sou
rce:
Lai
etal.(201
3).
Oth
er
Pop
ulation
Growth
Pop
ulation
grow
thover
theperiod20
06-201
0initiallyavailableat
thecounty
levelan
dthen
grou
ped
into
commutingzones.Sou
rce:
Bureau
ofEconom
icAnalysis(B
EA).
Segre
gation
FractionBlack
Thenumber
ofindividualswhoareblack
divided
bythetotalpop
ulation
within
acommutingzone.
Sou
rce:
Cen
sus20
00.
Racial
Segrega
tion
Multi-grou
pTheilIndex
calculatedat
thecensus-tractlevel
over
fourracial
grou
ps(w
hite,
black,
hispan
ican
dother).
Sou
rce:
Cen
sus20
00.
IncomeSegrega
tion
Atw
o-grou
pTheilindex
andreflects
thedegreewhichindividualsbelow
thepth
percentile
ofthe
localhou
seholdincomedistribution
aresegregated
from
individualsab
ovethepth
percentile
ineach
commutingzone.
Sou
rce:
Cen
sus20
00.
FractionwithCom
mute
<15
Mins
Thenumber
ofworkers
that
commute
less
than
15minutesto
workdivided
bythetotalnumber
ofworkers.Sou
rce:
Cen
sus20
00.
Tab
lecontinued
onnextpag
e...
20
Tab
leA1continued
Variable
Description
Tax
LocalTax
Rate
Total
taxrevenues
per
capitadivided
bymeanhou
seholdincomeper
capitaforworkingagead
ults
in19
92.Sou
rce:
1992
Cen
susof
Governmentcounty-level
summaries.
LocalGov
tExpen
dituresPer
Cap
ita
Thetotallocalgovernmentexpen
dituresper
capitain
1992
.Sou
rce:
1992
Censusof
Government
county-level
summaries.
Tax
Progressivity
Thedifferen
cebetween
thestateincometax
rate
forincomes
above$1
00,000
and
incomes
in
thebottom
taxincomebracket
in20
08.
Sou
rce:
State
incometaxratesin
2008
from
theTax
Fou
ndation.
State
EIT
CExposure
ThemeanstateEarned
IncomeTax
Credittop-uprate
between19
80-200
1,withtherate
coded
as
zero
forstates
withnostateEarned
IncomeTax
Credit.Sou
rce:
Hotzan
dScholz(2003)
Education
SchoolExpen
diture
per
Student
Average
expen
dituresper
studentin
publicschoolsin
1996
-199
7.Sou
rce:
National
Centerfor
Education
Statistics.
TestScore
Percentile
(Incomead
justed
)Theresidual
from
aregression
ofmeanMathan
dEnglishtest
scores
(in2004,2005
and2007)
appropriatelystan
dardized
usingthehou
seholdincomeper
capitain
2000
.Sou
rce:
Global
Rep
ort
Card.
StudentTeacher
Ratio
Average
student-teacher
ratio
inpublic
schoolsin
1996
-199
7.Sou
rce:
National
Centerfor
Education
Statistics.
HighSchool
Dropou
tRate(Incomead
justed
)Theresidual
from
aregression
ofhighschool
dropou
trateson
hou
seholdincomeper
capitain
2000
.Sou
rce:
National
CenterforEducation
Statistics.
College
Number
ofCollegesper
Cap
ita
Number
ofCollegesper
Cap
itain
2000
.Sou
rce:
Integrated
Postsecon
daryEducation
DataSystem
(IPEDS).
CollegeTuition
Themean
in-state
tuition
and
fees
forfirst-time,
full-tim
eundergrad
uates
in2000.
Sou
rce:
Integrated
Postsecon
daryEducation
DataSystem
(IPEDS).
CollegeGraduationRate(IncomeAdjusted
)Theresidual
from
aregression
ofgrad
uation
rate
in20
09.
Sou
rce:
Integrated
Postsecon
dary
Education
DataSystem
(IPEDS).
Tab
lecontinued
onnextpag
e...
21
Tab
leA1continued
Variable
Description
LaborM
ark
et
Lab
orForce
Participation
Theshareof
people
atleast16
years
oldthat
arein
thelabor
force.
Sou
rce:
Census2000.
ShareWorkingin
Man
ufacturing
Shareof
employed
persons16
andolder
workingin
man
ufacturing.
Sou
rce:
Cen
sus2000.
Growth
inChineseIm
ports
Shareof
grow
thin
imports
from
Chinaper
workerbetween19
90an
d20
00.Sou
rce:
Autoret
al.
(201
3).
Teenag
e(14-16
)Lab
orForce
Participation
Shareof
childrenbornbetween19
85-198
7whoreceived
aW
2when
they
wereag
e14-16.
Sou
rce:
Cen
sus20
00.
Migra
tion
Migration
Inflow
Rate
Migration
into
thecommutingzonefrom
other
commutingzones
between20
04an
d2005.Sou
rce:
IRSStatisticsof
Income.
Migration
Outlflow
Rate
Migration
outof
thecommutingzonefrom
other
commutingzones
between20
04an
d2005.Sou
rce:
IRSStatisticsof
Income.
FractionForeign
Born
Shareof
commutingzoneresidents
bornou
tsidetheUnited
States.
Sou
rce:
Cen
sus2000.
SocialCapital
Social
Cap
ital
Index
Astan
dardized
index
combiningmeasuresof
voter
turnou
trates,thefraction
ofpeople
whoreturn
theircensusform
s,an
dmeasuresof
participationin
communityorga
nizationsin
1990.Sou
rce:
Rupasingh
aan
dGoetz(200
8).
FractionReligious
Shareof
religiou
sad
herents
in20
00.Sou
rce:
Associationof
ReligionDataArchives.
ViolentCrimeRate
Number
ofarrestsforseriou
sviolentcrim
esper
capitain
2000
.Sou
rce:
FBI’sUniform
Crime
Rep
orts.
FamilyStructu
re
Fractionof
ChildrenwithSingleMothers
Thenumber
ofsinglefemalehou
seholdswithchildrendivided
bythetotalnumber
ofhou
seholds
withchildren.Sou
rce:
Cen
sus20
00.
Fractionof
AdultsDivorced
Fractionof
people
15or
older
whoaredivorced.Sou
rce:
Cen
sus20
00.
Fractionof
AdultsMarried
Shareof
people
15or
older
whoaremarried
andnot
separated
.Sou
rce:
Cen
sus2000.
22
Table A2: Threshold Tests and Threshold Estimates-Absolute Upward Mobility
Threshold variable p-value Threshold 95% CI jsse n1 n2
Model 1Gini 0610 0.0006 0.4399 [0.430500, 0.445500] 17570 437 249Patents per capita 2006 to 2010 0.0000 0.0290 [0.029000, 0.029000] 15971 301 385Household income per capita 2000 0.0000 36561 [35647.90, 37445.10] 16812 553 133Income segregation 0.0000 0.0189 [0.018852, 0.018852] 13936 207 479Racial segregation 0.0000 0.0921 [0.069107, 0.110686] 14825 275 411School expenditure per student 0.0000 6.2566 [5.945260, 6.921530] 16984 456 230
Model 2Top 1% in 2010 0.0002 11.4170 [10.10000, 15.20000] 20660 256 430Patents per capita 2006 to 2010 0.0000 0.0290 [0.029000, 0.029000] 18547 301 385Household income per capita 2000 0.0000 36561 [35395.80, 36670.90] 19305 553 133Income segregation 0.0000 0.0177 [0.017511, 0.018852] 16296 191 495Racial segregation 0.0000 0.0921 [0.092149, 0.092149] 17348 275 411School expenditure per student 0.0000 6.2566 [5.945260, 6.291440] 19623 456 230
Model 3Gini 0610 0.0000 0.4483 [0.448000, 0.448250] 2639 506 180Patents per capita 2006 to 2010 0.0000 0.0246 [0.010400, 0.070600] 2721 269 417Household income per capita 2000 0.0000 29631 [29114.80, 29884.80] 2580 194 492Income segregation 0.0000 0.0187 [0.017936, 0.019661] 2565 206 480Racial segregation 0.0026 0.0576 [0.040798, 0.098412] 2718 153 533School expenditure per student 0.0002 6.2801 [6.242820, 6.508600] 2729 461 225
Model 4Top 1% in 2010 0.0006 11.5750 [11.30000, 12.43300] 2685 278 408Patents per capita 2006 to 2010 0.0000 0.0246 [0.010400, 0.065300] 2667 269 417Household income per capita 2000 0.0000 29631 [29114.80, 29884.80] 2538 194 492Income segregation 0.0000 0.0187 [0.017936, 0.019661] 2554 206 480Racial segregation 0.0038 0.0576 [0.040798, 0.098412] 2690 153 533School expenditure per student 0.0000 6.4154 [6.232540, 6.553360] 2686 485 201
23
Table A3: Threshold Tests and Threshold Estimates-Absolute Upward Mobility
Threshold variable p-value Threshold 95% CI jsse n1 n2
Model 1Gini 0610 0.5168 0.4500 [0.448500, 0.450333] 8851 311 106Patents per capita 2006 to 2010 0.0390 0.0224 [0.011600, 0.096500] 8629 152 265Income pc 2006 to 2010 0.0118 122714 [90262.6, 150581.0] 8649 182 235Income segregation 0.0000 0.0339 [0.017511, 0.035387] 7860 190 227Racial segregation 0.0000 0.1033 [0.091669, 0.121473] 7896 168 249School expenditure per student 0.0026 5.9472 [5.709220, 6.256620] 8591 242 175
Model 2Gini 0610 0.2452 0.4407 [0.410182, 0.458857] 9055 266 151Patents per capita 2006 to 2010 0.0002 0.0309 [0.011600, 0.040900] 8564 195 222Household income per capita 2000 0.0000 36561 [29087.8, 36581.8] 8719 352 65Income segregation 0.0000 0.0346 [0.034578, 0.035302] 7586 197 220Racial segregation 0.0000 0.0921 [0.091669, 0.096091] 7668 141 276School expenditure per student 0.0018 5.9472 [5.594440, 6.850360] 8761 242 175
Model 3Top 1% in 2010 0.0554 13.5500 [10.25000, 14.58000] 11473 319 98Patents per capita 2006 to 2010 0.0296 0.0213 [0.020700, 0.022400] 11441 143 274Income pc 2006 to 2010 0.0074 138069 [83747.4, 211665.0] 11375 220 197Income segregation 0.0000 0.0354 [0.032975, 0.036248] 10072 201 216Racial segregation 0.0000 0.1033 [0.098513, 0.109042] 9528 168 249School expenditure per student 0.0000 5.9579 [5.594440, 6.300310] 10833 243 174
Model 4Top 1% in 2010 0.0000 11.2670 [10.95000, 11.60000] 10991 133 284Patents per capita 2006 to 2010 0.0000 0.0276 [0.027600, 0.027600] 10797 180 237Household income per capita 2000 0.0000 36561 [33582.1, 36581.80] 10337 352 65Income segregation 0.0000 0.0346 [0.034578, 0.035682] 9030 197 220Racial segregation 0.0000 0.1090 [0.109042, 0.109042] 9031 181 236School expenditure per student 0.0000 5.9579 [5.594440, 6.288210] 10777 243 174
Model 5Gini 0610 0.0008 0.4544 [0.454400, 0.454400] 1108 340 77Patents per capita 2006 to 2010 0.0382 0.0129 [0.011600, 0.012900] 1194 74 343Income pc 2006 to 2010 0.0000 111171 [98541.0, 112356.0] 1093 151 266Income segregation 0.0052 0.0405 [0.038310, 0.040999] 1117 230 187Racial segregation 0.0816 0.1464 [0.139051, 0.146435] 1161 248 169School expenditure per student 0.0002 5.3609 [4.792550, 5.509570] 1188 154 263
Model 6Gini 0610 0.0014 0.4544 [0.454400, 0.454400] 1107 340 77Patents per capita 2006 to 2010 0.0368 0.0129 [0.011600, 0.012900] 1194 74 343Household income per capita 2000 0.0002 29115 [27671.0, 29690.60] 1082 118 299Income segregation 0.0026 0.0406 [0.040516, 0.040567] 1117 231 186Racial segregation 0.0952 0.1464 [0.139051, 0.146435] 1161 248 169School expenditure per student 0.0002 5.3609 [4.792550, 6.381580] 1188 154 263
Model 7Top 1% in 2010 0.4604 14.0200 [10.25000, 14.53300] 1167 341 76Patents per capita 2006 to 2010 0.0164 0.0129 [0.011900, 0.012900] 1118 74 343Income pc 2006 to 2010 0.0016 100109 [96865.0, 112356.0] 1057 109 308Income segregation 0.0076 0.0405 [0.038438, 0.040567] 1063 230 187Racial segregation 0.0134 0.1355 [0.135491, 0.135491] 1072 238 179School expenditure per student 0.0004 5.4951 [4.792550, 6.254280] 1143 172 245
Model 8Top 1% in 2010 0.4688 10.2500 [10.25000, 14.53300] 1167 62 355Patents per capita 2006 to 2010 0.0122 0.0129 [0.012400, 0.012900] 1111 74 343Household income per capita 2000 0.0024 28904 [27364.3, 29884.8] 1059 105 312Income segregation 0.0028 0.0405 [0.038438, 0.040567] 1063 230 187Racial segregation 0.0166 0.1355 [0.135491, 0.135491] 1074 238 179School expenditure per student 0.0004 5.4951 [4.792550, 6.449580] 1144 172 245
24
Table A4: Threshold Tests and Threshold Estimates-Income Inequality
Threshold variable p-value Threshold 95% CI jsse n1 n2
Model 1Absolute upward mobility 0.0000 48.6473 [44.84280, 50.33630] 0.292 554 132Patents per capita 2006 to 2010 0.0000 0.0653 [0.063800, 0.065300] 0.297 499 187Household income per capita 2000 0.0000 33836 [31564.5, 37765.4] 0.289 417 269Income segregation 0.0500 0.0175 [0.017511, 0.017511] 0.313 190 496Racial segregation 0.6068 0.0439 [0.040798, 0.044338] 0.312 113 573School expenditure per student 0.0000 6.8715 [4.825330, 6.951410] 0.305 569 117
Model 2Absolute upward mobility 0.2182 44.7158 [38.20230, 50.33630] 7865 420 266Patents per capita 2006 to 2010 0.0098 0.0653 [0.065300, 0.065300] 7442 499 187Household income per capita 2000 0.0028 37765 [33735.60, 37765.40] 6929 583 103Income segregation 0.1200 0.0243 [0.012165, 0.077187] 7860 275 411Racial segregation 0.3034 0.0408 [0.040798, 0.041649] 7245 102 584School expenditure per student 0.0030 6.7436 [4.825330, 6.961240] 7917 550 136
Model 3Absolute upward mobility 0.0000 43.1105 [38.20230, 47.19250] 0.174 328 358Patents per capita 2006 to 2010 0.0200 0.0104 [0.010400, 0.059000] 0.184 102 584Household income per capita 2000 0.0002 28676 [27596.20, 34903.50] 0.176 142 544Income segregation 0.0056 0.0121 [0.011207, 0.013245] 0.186 125 561Racial segregation 0.0030 0.0409 [0.040798, 0.079856] 0.183 103 583School expenditure per student 0.0000 6.6602 [6.348530, 6.716960] 0.180 536 150
Model 4Absolute upward mobility 0.0458 44.7415 [38.20230, 45.21100] 5084 421 265Patents per capita 2006 to 2010 0.1054 0.0553 [0.055300, 0.055500] 4876 470 216Household income per capita 2000 0.0048 37765 [35115.40, 37765.40] 4790 583 103Income segregation 0.2374 0.0200 [0.012165, 0.066153] 5144 225 461Racial segregation 0.0112 0.0409 [0.040931, 0.040963] 4685 103 583School expenditure per student 0.0158 6.7442 [6.609310, 6.744160] 5183 551 135
25
Table A5: Threshold Tests and Threshold Estimates-Income Inequality
Threshold variable p-value Threshold 95% CI jsse n1 n2
Model 1Absolute upward mobility 0.0000 48.9730 [45.52900, 49.13120] 0.152 350 67Patents per capita 2006 to 2010 0.0000 0.0298 [0.018700, 0.050800] 0.157 190 227Income pc 2006 to 2010 0.1078 107203 [79094.6, 116050.0] 0.166 136 281Income segregation 0.1976 0.0197 [0.014909, 0.077296] 0.166 96 321Racial segregation 0.0886 0.1715 [0.054773, 0.229596] 0.169 289 128School expenditure per student 0.0002 6.4678 [4.801710, 6.637590] 0.161 317 100
Model 2Absolute upward mobility 0.0000 48.4992 [45.52900, 49.13120] 0.124 346 71Patents per capita 2006 to 2010 0.0020 0.0223 [0.011600, 0.096500] 0.136 150 267Household income per capita 2000 0.0004 29591 [27671.0, 32542.4] 0.133 131 286Income segregation 0.0042 0.0391 [0.025234, 0.045964] 0.137 223 194Racial segregation 0.2330 0.0762 [0.054773, 0.229596] 0.140 99 318School expenditure per student 0.0060 4.8017 [4.792550, 6.490410] 0.135 63 354
Model 3Absolute upward mobility 0.0544 43.5892 [41.54250, 48.34280] 2301 226 191Patents per capita 2006 to 2010 0.0094 0.0517 [0.011600, 0.096500] 2305 287 130Income pc 2006 to 2010 0.1984 87991 [79094.6, 223038.0] 2300 84 333Income segregation 0.0022 0.0363 [0.030244, 0.044342] 2274 207 210Racial segregation 0.0514 0.1729 [0.169432, 0.190527] 2279 290 127School expenditure per student 0.2768 6.6599 [4.792550, 6.850360] 2326 337 80
Model 4Absolute upward mobility 0.0128 44.8452 [44.68650, 45.52880] 2185 271 146Patents per capita 2006 to 2010 0.0378 0.0217 [0.021200, 0.021700] 2288 145 272Household income per capita 2000 0.0094 34085 [27015.0, 36581.8] 2280 285 132Income segregation 0.0310 0.0363 [0.021391, 0.043227] 2285 207 210Racial segregation 0.3010 0.2296 [0.056100, 0.229596] 2312 353 64School expenditure per student 0.1756 6.3365 [4.792550, 6.850360] 2306 302 115
Model 5Absolute upward mobility 0.0000 43.3440 [37.60100, 43.58920] 0.069 219 198Patents per capita 2006 to 2010 0.0038 0.0139 [0.013900, 0.013900] 0.068 79 338Income pc 2006 to 2010 0.1532 79095 [79094.6, 93480.4] 0.071 62 355Income segregation 0.0718 0.0307 [0.015868, 0.046819] 0.075 170 247Racial segregation 0.1428 0.0586 [0.058567, 0.058805] 0.074 69 348School expenditure per student 0.0158 6.8351 [4.792550, 6.850360] 0.072 351 66
Model 6Absolute upward mobility 0.0000 43.3440 [37.60100, 43.60530] 0.069 219 198Patents per capita 2006 to 2010 0.0020 0.0140 [0.012800, 0.014900] 0.066 81 336Household income per capita 2000 0.0022 28343 [27671.0, 29146.8] 0.068 92 325Income segregation 0.0378 0.0300 [0.022798, 0.031864] 0.073 163 254Racial segregation 0.0954 0.0586 [0.058567, 0.058567] 0.073 69 348School expenditure per student 0.0052 5.7422 [4.792550, 6.850360] 0.072 209 208
Model 7Absolute upward mobility 0.1406 43.5892 [37.60100, 45.52880] 1371 226 191Patents per capita 2006 to 2010 0.0122 0.0398 [0.026700, 0.040500] 1368 242 175Income pc 2006 to 2010 0.1086 79095 [79094.6, 79298.4] 1251 62 355Income segregation 0.0200 0.0464 [0.046404, 0.046404] 1350 257 160Racial segregation 0.8224 0.0802 [0.080200, 0.080200] 1436 114 303School expenditure per student 0.3222 6.3816 [4.792550, 6.537840] 1391 306 111
Model 8Absolute upward mobility 0.1496 45.4935 [37.60100, 45.52880] 1287 293 124Patents per capita 2006 to 2010 0.0360 0.0398 [0.013400, 0.089300] 1356 242 175Household income per capita 2000 0.0396 28788 [28343.3, 29114.5] 1246 104 313Income segregation 0.0198 0.0416 [0.022163, 0.056826] 1319 236 181Racial segregation 0.6014 0.0917 [0.091669, 0.091669] 1388 140 277School expenditure per student 0.4890 6.3816 [4.792550, 6.449580] 1346 306 111
26