Growth, Income Distribution and Democracy: What the Data Say
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Growth, Income Distribution and Democracy:
What the Data SayRoberto Perotti, Columbia University September 1995
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Introduction• Main concern of the paper is to investigate relationship between
income distribution, democratic institution and growth.• Three main issues;
1) The reliability of the income distribution data2) The robustness of reduced form relationships3) Specification issues
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Main Approaches• Fiscal policy (Alesina and Rodrik-1994)• FP1 : The economic mechanism• FP2 : The political mechanism• FP3 : The reduced/simple form
• Socio-political instability• SP1 : Investment & growth correlate with social- political
instability (+)• SP2 : Social-political instability correlate with equality (-)• SP3 : The reduced form
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Main Approaches (cont.)• Imperfect capital market• ICM1 : Correlation growth and investment in human capital (+)• ICM2 : Correlation investment and equality (+)• ICM3 : The reduced form
• “Endogenous fertility”• Similar to imperfect capital market but with extensive relationship with
fertility (because investment in human capital and fertility are connected)
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The Distribution data• Preliminary Problems when testing the theories:• The relevant distribution in several cases is of wealth rather than income• The effect of income distribution on growth depend on whole shape of
distribution of income
• “Middle Class” is used as appropriate measure of equality.• Most observations are obtained from two compilations: Jain (1975)
and Lecaillon et al. (1984)
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Data are based on household surveys. Non-household based data are adjusted.
• Three South-east Asian “tigers” ; South Korea, Taiwan, and Korea have higher shares of middle class than most countries
• Highest share of middle class : Denmark• Lowest Share of middle class : Kenya
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Democracy effect seems to be not robust especially when a certain or some countries are excluded from the data
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Conclusion of reduced form(1) There is a positive association between equality and growth, although a
good deal of it is coming from intercontinental variation;(2) This positive association is quantitatively much weaker, and statistically
insignificant, for poor countries; however, this can be explained both on empirical and theoretical grounds;
(3) There is some indication that the association between equality and growth is stronger in democracies; however, the democracy effect does not seem to be very robust;
(4) Because of the high concentration of democracies in rich countries, it is virtually impossible to distinguish an income effect from a democracy effect in the relationship between income distribution and growth.
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• endogenous variables at a time• estimating different simple models• social security and welfare,• healt and housing,• public expedniture on education
fiscal policy approach
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• GDP - per capita GDP in 1960• MSE - average years of secondary schooling of the
male population, 1960• FSE- average years of secondary schooling of the
female population, 1960• PPPI - PPP value of the investment deflator,
relative to the U.S., 1960• MTAX - average marginal tax rate between 1970
and 1985 -> fiscal policy variable• MID - share in income of the third and fourth
quintiles• GR: average yearly growth rate of per capita GDP,
1960-85
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political instability approach• two types of measurabe definition of instability• exectuive instability i.e. frequency of government turnovers• emphasizes phenomena of social unrest i.e. politial
assassinations, mass demonstrations etc.
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• LAAM, ASIA, AFR– dummy variable for different countries
• HOMOG - percentage of the population belonging to the main ethnic or linguistic group
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• SPI: index of socio-political instability, constructed as discussed in section 6
• RICH - dummy variable for countries with values of GDP higher than $1,500.
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imperfect capital market and endogenous fertility
approaches• human capital investment decision – secondaty school
enrollment• Opportunity cost in developing countries
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Conclusion - equal societies -> lower fertility rates and higher rates
of investment in education- unequal societies -> politicaly and socially unstable,
lower rates of investment and growth- Data does not show that more equal societies grow
faster
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References• Alesina, A. and R. Perotti (1995): Income Distribution, Political
Instability, and Invest- ment, forthcoming, European Economic Review; • Alesina, A. and D. Rodrik (1994): Distributive Politics and Economic
Growth, Quarterly Journal of Economics, 109, 465-90;• Banerijee, A. and A. Newman (1991): Risk Bearing and the Theory of
Income Distribution, Review of Economic Studies, 58 211-35;• Barro, R. J. (1994): Democracy and Growth, NBER working paper No.
4909;• Galor, 0. and J. Zeira (1993): Income Distribution and Macroeconomics,
Review of Economic Studies, 60, 35-52;
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• Jain, S. (1975): Size Distribution of Income: A Compilation of Data, World Bank, Washington, D.C.;• Lecaillon, J. et al. (1984): Income Distribution and Economic
Development, ILO, Geneva;