11.10 Preferential Trading Arrangements
Transcript of 11.10 Preferential Trading Arrangements
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Class 19
Preferential Trading Arrangementsby
Alan V. DeardorffUniversity of Michigan
2020
PubPol/Econ 541
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Outline
• Background• Simplest model: horizontal supplies• Upward-sloping supplies
– 3-country case, in graphs– Somewhat more general case, in equations– 4-country case, in graphs
• Are FTAs Beneficial?
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Outline
• Background• Simplest model: horizontal supplies• Upward-sloping supplies
– 3-country case, in graphs– Somewhat more general case, in equations– 4-country case, in graphs
• Are FTAs Beneficial?
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Background• A Preferential Trading Arrangement (PTA)
– Exists when a country uses a lower tariff on one country than on another
• Examples– Free Trade Agreements and Customs Unions
• Zero tariff on (almost) all goods from partner country
– Generalized System of Preferences (GSP)• Lower than WTO tariffs on some exports of selected
developing countries
– ADD, CVD (not Safeguards tariffs, which must apply to all)
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Background• A PTA is not the same as lowering a tariff on
imports from all countries• Reason: There is both
– “Trade creation”• Increased imports from the favored partner instead of from
domestic producers
– “Trade diversion”• Switch to import from favored partner instead of from another
country (”third country”)
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Background
• Viner’s (1950) trade creation and trade diversion
are usually illustrated with
– Constant costs
– 2-country FTA or CU plus rest of world
• Then we’ll look at cases with
– Upward sloping supplies
– And in the last case, an FTA when there is another
pre-existing FTA
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Arrangements
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Pause for Discussion
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Questions
• Why does the text say that the GATT permission for countries to form FTAs is a “rather strange exception”?
• Why do members of a customs union “cede part of their national sovereignty to a supranational entity”?
• Why are rules of origin needed in a Free Trade Agreement but not in a Customs Union?
• What is diagonal cumulation?
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Outline
• Background• Simplest model: horizontal supplies• Upward-sloping supplies
– 3-country case, in graphs– Somewhat more general case, in equations– 4-country case, in graphs
• Are FTAs Beneficial?
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Simplest Model
• Assume– Partial-equilibrium model of trade in a good
• All the same assumptions we’ve used before for tariffs
– 3 countries: • Home, A• Potential Partner 1, B, and • Potential Partner 2, C
– B and C have constant costs of exporting to A, at prices PB < PC
– A has tariff, t > PC – PB
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No FTA
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PS
Paut
PB
D
QS0 M0
PC
PB+t
PC+t
• Without FTA– Since PB+t < PC+t Home
imports only from B
D0
Class 19: Preferential Trading Arrangements
Home Country A
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PS
Paut
PB
D
QS0 M0
FTA with B• Since PB < PC+t Home still
imports only from B
• Country C plays no role
PC
PB+t
PC+t
a b c d
WelfareSuppliers lose –a
Demanders gain +(a+b+c+d)
Government loses –c
Country gains +(b+d)
Same as Free TradeD1S1 D0
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FTA with low-cost country, BHome Country A
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P SPaut
PB
D
QS0 D0M0
PC
PB+tPC+t
a b c d
D1D1
Trade CreationClass 19: Preferential Trading
Arrangements
FTA with low-cost country, BHome Country A
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PS
Paut
PB
D
QS0 M0
FTA with C• Since PC < PB+t Home now
imports only from C
PC
PB+t
PC+t
a b c d
WelfareSuppliers lose –aDemanders gain +(a+b+c+d)Government loses –(c+e)Country loses –e+(b+d)
Not same as Free Tradeand may be a loss, if
e>(b+d)
e
S1 D1D0
Class 19: Preferential Trading Arrangements
FTA with high-cost country, CHome Country A
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P SPaut
PB
D
QS0 M0
PC
PB+tPC+t
a b c d
e
S1 D1D0
Trade Creation
Trade Diversion
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FTA with high-cost country, CHome Country A
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Pause for Discussion
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Questions
• If consumers in an FTA buy imports from their FTA partner rather than a non-member due to their paying a lower price, how can that be harmful for the country?
• The examples show only trade creation if the PTA is with the low-cost country. Should countries therefore only form PTAs with low-cost countries?
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• Trade in a service is not subject to tariffs, since nothing physical
crosses borders
• It is subject to regulatory standards, which also raise cost, by some
amount, say “s”
• Assume that FTA removes this cost through
– Harmonization of standards
– Mutual recognition
• The difference is that
– Tariff t is revenue to government
– Regulatory cost s is a real cost, using real resources, and not a transfer
or benefit to anyone
• Pictures look the same as before, except for interpretation of this
cost.
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Trade in Services
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PS
Paut
PB
D
QS0M0
FTA with B
• Since PB < PC+s Home still
imports only from B
• Country C plays no role
PC
PB+s
PC+s
a b c d
Welfare
Suppliers lose –a
Demanders gain +(a+b+c+d)
Government loses 0
Country gains +(b+c+d)
D1S1 D0
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Arrangements
Service FTA with low-cost, BHome Country A
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PS
Paut
PB
D
QS0 M0
FTA with C• Since PC < PB+s Home now
imports only from C
PCa b c d
WelfareSuppliers lose –aDemanders gain +(a+b+c+d)Government loses 0Country gains +(b+c+d)
Certain gain, but not as large as with country B
e
S1 D1D0
PC+s
PB+s
Class 19: Preferential Trading Arrangements
Service FTA with high-cost, CHome Country A
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Pause for Discussion
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Questions
• What is the main difference between the effects of a PTA in goods and one in services?
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Outline
• Background• Simplest model: horizontal supplies• Upward-sloping supplies
– 3-country case, in graphs– Somewhat more general case, in equations– 4-country case, in graphs
• Are FTAs Beneficial?
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Upward-sloping Supplies3-country case*
• Assume– Partial-equilibrium model of trade in a good
• All the same assumptions we’ve used before for tariffs– Three countries, one importer A, and two exporters B, and C– Export supply and import demands are linear– Countries B and C are identical
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For simplicity
*Much of this is an elaboration of material in World Trade Organization, "Causes and Effects of PTAs: Is it all about preferences?", Ch. C: World Trade Report 2011, pp. 92-121.
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Upward-sloping Supplies3-country case*
• Two equilibria:– 0: MFN specific tariff t on exports of both B and C– 1: FTA of A and B:
• tariff t on exports of C; • zero tariff on exports of B
• Assume also: A imports from both B and C in both equilibria – That’s not guaranteed, but it’s possible as we’ll see, and
other cases would be harder
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P
!" = !$
Q
Export Supplies of B and C
Q
Exports to Country A
%"&, %$& P %"& + %$&
%") + %$&
*
Export Supplies
%"), %$)
Class 19: Preferential Trading Arrangements
MFNFTA
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P
!"#, !%#
Q Q
Import Market
!"&, !%& P
'(
!)" = !)% ')( = !)" +!)%
MFN Equilibrium
," = ,%-
!"& + !%&
!"# + !%&.)(
Export Supplies
Class 19: Preferential Trading Arrangements
MFNFTA
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P
Q Q
!"#, !%# P
&'
!("= !(%
!*%
FTA Equilibrium
!*" &(' &*'
+" = +%,
!"# + !%#
!". + !%#/('/*'
!"., !%.
Export Supplies Import Market
Class 19: Preferential Trading Arrangements
MFNFTA
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Trade Creation and Diversion
P
Q Q
!"#, !%# P
&'
!(" &)' &('
*" =*%
,
!"# + !%#
!". + !%#!"., !%.
/)'/('
TD TC
Export Supplies Import Market
!)"= !)%
!(%
Class 19: Preferential Trading Arrangements
MFNFTA
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TC & TD, another View
!"
Q Q
#$%, #'%
("
#)$ (*" ()"
+
#$% + #'%
#$- + #'%#$-, #'-
!*"!)"
TD TCTDTC
Export Supplies Import Market
#*$= #*'
#)'2$ =2'
!"
Class 19: Preferential Trading Arrangements
MFNFTA
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Welfare Effects on Country A
Q
Export Supplies
Q
!"#, !%#
&'
!(" &)' &('
Tariff revenue lost
fromB C
Net gain of A’s private sector
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Import Market
!)"= !)%
!(%
-' -'
2"= 2%
See immediately that country A• Gains from trade creation• Loses from trade diversion• As well as from lost revenue from country B
MFNFTA
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32
Welfare Effects on Countries B and C
Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
Gain by partner country B
Loss by outside country
C
-' -'
2"= 2%
Class 19: Preferential Trading Arrangements
MFNFTA
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33
Welfare Effects on the World
These add up, with much cancellation to yield the following:
Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
-' -'
2"= 2%
Class 19: Preferential Trading Arrangements
MFNFTA
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34
Welfare Effects on the World
These add up, with much cancellation to yield the following:
Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
-' -'
2"= 2%
Class 19: Preferential Trading Arrangements
FTAMFN
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35
Welfare Effects on the World
These add up, with much cancellation to yield the following:
Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
-' -'
2"= 2%
Class 19: Preferential Trading Arrangements
MFNFTA
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36
Welfare Effects on the World
These add up, with much cancellation to yield the following:
Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
-' -'
2"= 2%
Class 19: Preferential Trading Arrangements
MFNFTA
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Welfare Effects on the World
These add up, with much cancellation to yield the following:
Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
-' -'
2"= 2%
=
Class 19: Preferential Trading Arrangements
MFNFTA
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38These add up, with much cancellation to yield the following:
Welfare Effects on the World
Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
-' -'
2"= 2%
Class 19: Preferential Trading Arrangements
MFNFTA
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39These add up, with much cancellation to yield the following:
Welfare Effects on the World
Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
-' -'
2"= 2%
Class 19: Preferential Trading Arrangements
MFNFTA
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Welfare Effects on the World
Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
Loss from trade
diversion
Gain from trade creation
-' -'
2" =2%
Class 19: Preferential Trading Arrangements
MFNFTA
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Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
Why the Loss from Trade Diversion
C’s fall in cost
B’s rise in cost
-' -'
2" =2%
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MFNFTA
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Welfare Effects on the World
Q Q
!"#, !%#
&'
!(" &)' &('
*
!"# + !%#
!", + !%#!",, !%,
-)'-('
TD TCTDTC
Export Supplies Import Market
!)"= !)%
!(%
Loss from trade
diversion
Gain from trade creation
-' -'
2" =2%
• Loss is an area, product of the price change and the quantity of trade diversion, with the latter depending on the former.
• So the loss rises with the square of trade diversion.Class 19: Preferential Trading
Arrangements
MFNFTA
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Pause for Discussion
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Questions
• Why did we need to assume that “A imports from both B and C in both equilibria.” – Could it have been otherwise?– Would it matter for any results?
• Why is trade diversion harmful if both exporters initially charge the same price?
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Outline
• Background• Simplest model: horizontal supplies• Upward-sloping supplies
– 3-country case, in graphs– Somewhat more general case, in equations– 4-country case, in graphs
• Are FTAs Beneficial?
Class 19: Preferential Trading Arrangements
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Four-Country Model in Equations
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• Assume
– Partial-equilibrium model of trade in a good
• All the same assumptions we’ve used before for tariffs
– Four countries, one importer A, and three exporters B, C, and D
– Export supply and import demands are linear
– Countries B, C, and D are not assumed identical
• Purpose
– To see effect of country A adding a new FTA (with B) when it
already has an FTA (with D). (Country C remains an outside
country, the rest of world.)
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Four-Country Model in Equations
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• Three equilibria
– 0: MFN tariff t on exports of B, C, and D
– 1: FTA of A and D:
• Tariff t on exports of B and C;
• Zero tariff on exports of D
– 2: FTA of A with B, keeping FTA with D
• Tariff t on exports of C only
• Zero tariff on exports of B and D
• Consider only cases with positive exports to A from
all three of B, C, and D in all equilibria
Skip to results
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Exports:
Imports:
Equilibrium:
!" = $" %" − '" , ) = *, +, ,, %" ≥ '"
./ = $/ '/ − %/ , %/ ≤ '/
./ = !1 + !3 + !4
Class 19: Preferential Trading Arrangements
The Model
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Let:
Then solution is:!" = $ + &'(' + &)() + &*(*
+ = ," + ,' + ,) + ,*
$ = &"-" + &'-' + &)-) + &*-*&. = ⁄,. +
Class 19: Preferential Trading Arrangements
The Model
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• With more assumptions, !" are proportional to country size– (See paper)
• Therefore #" is country i’s share of world economy– (This is not really right, as it assumes both
demanders and suppliers in proportion to population. Exporters will in fact have more firms, and thus greater weight, than importers.)
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The Model
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51
Effect of new FTA between A and B (in presence of A’s FTA with D)
Let ∆ be change from equilibrium 1 to equilibrium 2
Thus price in A falls by a fraction of the tariff, in proportion to size of new partner compared to world.
Country B’s price rises by the rest of the tariff
Because A’s tariff on C and D does not change
∆"# = −&'(
∆"' = (1 − &')(
∆", = ∆"- = ∆"# = −&'(
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The Model
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52
From the price changes, one derives the following changes in quantities of trade:
∆"#= %&'#( > 0∆+&= %& '# + '- + ./ ( > 0
∆+-= −%&'1( < 0
∆+/= −%&'3( < 0
Class 19: Preferential Trading Arrangements
The Model
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53
As must be from market equilibrium
Thus the added exports of the partner country include the new imports of country A plus the reduced exports of countries C and D. We label
and
because it is reversal of trade diversion from the prior FTA.
∆"#= ∆%& − ∆"( −∆")
−∆"( as “trade diversion”
−∆") as “trade reversion”
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The Model
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54
Thus
!"#$% &"%#'()* = !& = ,-./' > 0
!"#$% 2%3%"4()* = !2 = ,-.5' > 0
!"#$% 6(3%"4()* = !6 = ,-.7' > 0
Class 19: Preferential Trading Arrangements
The Model
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55
Welfare effects of new FTA
Country A (home):
Country B (new partner):
Country C (outside world):
Country D (old partner):
∆"#= ⁄&'# (# + *+ ⁄, 2 ./ − ,.1 − ,2'+
∆"+= ∆34+= 2'+ +12 ./ + .1 + .6 1 − *+ ,
∆"7= −2'7 +.12 *+,
∆"8= −2'8 +.62 *+,
Lost tariff revenue
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The Model
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56
Welfare effects of new FTA on the World
World (A+B+C+D):
∆"#= 12'() +
12 '+ − '- )
Class 19: Preferential Trading Arrangements
The Model
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Pause for Discussion
Class 19: Preferential Trading Arrangements
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Questions
• Under what circumstances will adding a second FTA be harmful for the world?
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Outline
• Background• Simplest model: horizontal supplies• Upward-sloping supplies
– 3-country case, in graphs– Somewhat more general case, in equations– 4-country case, in graphs
• Are FTAs Beneficial?
Class 19: Preferential Trading Arrangements
59
Skipping this unless there’s
extra time
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• Four countries:– Importer A– Exporters B, C, and D
• Export supply and import demands are linear
• Countries B, C, and D are identical
Class 19: Preferential Trading Arrangements
60
Four-Country Model in Figures
For simplicity
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• Two equilibria
1: MFN tariff t on exports of both B and C
• Zero tariff on exports of old FTA partner D
2: New FTA of A and B:
• Tariff t on exports of C only;
• Zero tariff on exports of two FTA partners B and D
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61
Four-Country Model in Figures
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62
P
!" =!$ =!% Q
Export Supplies of B, C, and D
Q
Export Supplies to Country B
&"', &$', &%' P
∑&* = &"* + &$* +&%*,
Export Supplies
∑&- = &"* + &$' +&%*
∑&. = &"' + &$' +&%*
/" = /$ = /%
∑&0 = &"' + &$' +&%'&"*, &$*, &%*
Class 19: Preferential Trading Arrangements
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63
P
Q
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P
Equilibrium 1: A has FTA with 1 country, D
∑!(
∑!)*+
!("= !(%
!(& *(+
= !(" +!(% + !(&
!"., !%., !&.
/
Import Market
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64
P
Q
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
!("= !(%
!(& *(+
Equilibrium 2: A has FTA with 2 countries, B & D
!)% !)"= !)&
*)+
!"-, !%-, !&-
.
Import Market
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65
P
Q
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
!("= !(%
!(& *(+
Changes in Trade from expanding FTA to Country B
!)% !)"= !)&
∆*+∆!% ∆!&
*)+
!"., !%., !&.
/
Import Market
∆!"
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Trade Creation
66
P
Q
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
∆!" ∆*+∆!% ∆!&TD TR TC
Trade Creation (TC), Diversion (TD), and Reversion (TR)
!"1, !%1, !&1
2
Import Market
Trade CreationTrade Diversion Trade Reversion
Class 19: Preferential Trading Arrangements
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67
P
Q
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Trade Creation (TC), Diversion (TD), and Reversion (TR)
∆!" ∆*+∆!% ∆!&
TRTDTCNote that ∆!", while a gain to Country B, is the sum of TC, TD, & TR, since ∆!"= ∆*+ − ∆!% − ∆!&
!"2, !%2, !&2
3
Import Market
TD TR TC
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68
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on Country ATariff
revenue lost from
B CNet gain of A’s private
sector
Note that trade reversion does not appear to affect A’s welfare. I suspect this is an artifact of making export supplies from B and D the same.
!",, !%,, !&,
-
Import Market
Q
∆!" ∆*+∆!% ∆!&
∆!&TR
∆!%TD∆*+
TC
TR TCTD
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69
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effect on Country B
!",, !%,, !&,Net gain of B’s private
sector
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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70
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effect on Country C
Net loss of C’s private
sector
!",, !%,, !&,
-
Import Market
Q
TRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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71
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effect on Country D
!",, !%,, !&,Net loss of D’s private
sector
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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72
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
I claim that these gains and losses mostly cancel out to reduce to the following:
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73
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effect on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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74
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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75
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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76
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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77
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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78
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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79
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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80
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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81
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!(" !(% !(&!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
!("= !(%
!(&
Class 19: Preferential Trading Arrangements
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82
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!(" !(% !(&!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
!("= !(%
!(&
Class 19: Preferential Trading Arrangements
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83
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
!("= !(%
!(&!(" !(% !(&
Class 19: Preferential Trading Arrangements
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84
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effects on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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85
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effect on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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86
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effect on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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87
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effect on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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88
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effect on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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89
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effect on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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90
P
Export Supplies of B, C, and D
Q
!"#, !%#, !&# P ∑!(
∑!)*+
Welfare Effect on World
!",, !%,, !&,
-
Import Market
QTRTDTC
TR TCTD
Class 19: Preferential Trading Arrangements
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4-country case
91
• Result:– World welfare rises with second FTA, by amount
depending on trade creation and the tariff
• Recall from model:
• Here, because we’ve assumed countries B and D are the same, TR=TD
∆"#= 12'() +
12 '+ − '- )
∆"#= 12'()
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4-country case
92
• In general, !" ≠ !$• Which is larger depends just on country size, size
both face the same price change.
• If the new partner is smaller than the old, !" > !$ , and world gain will be larger
• If new partner is bigger than old, then !" < !$and world gain will be smaller and perhaps a loss.
∆45= 12!9: +
12 !" − !$ :
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Conclusion
• Analysis of FTAs shouldn’t treat each independently of FTAs that already exist
• Sequencing of FTAs can matter.
93 Class 19: Preferential Trading Arrangements
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Pause for Discussion
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Questions
• Why is adding a second FTA not harmful for the world in the graphs, but may be harmful in the world in the equations?
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Outline
• Background• Simplest model: horizontal supplies• Upward-sloping supplies
– 3-country case, in graphs– Somewhat more general case, in equations– 4-country case, in graphs
• Are FTAs Beneficial?
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Are FTAs Beneficial?• My own work suggests that they are, though the
benefits are not huge• But many (not economists) disagree• Much has been said about NAFTA
– It’s political reputation has been negative• Labor unions• Democrats• Trump
– Economists have been more positive• See Posen (economist and President of Peterson Institute of
International Economics)Class 19: Preferential Trading
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Are FTAs Beneficial
• Posen’s points– Consumers in all three countries have gained.
– Workers have suffered, but not from NAFTA.
– “Recent research has found that, on average, for every 100 jobs
US manufacturers created in Mexican manufacturing, they
added nearly 250 jobs at their larger US home operations…”
– Until the financial crisis of 2008, US unemployment was lower
after NAFTA than before.
– Concern that displaced Mexican farmers would come north were
not justified, as border apprehensions have declined steadily
since 2000. The recent surge of minors crossing from Central
America has nothing to do with NAFTA.
– Critics estimate job losses due to NAFTA of 45,000 a year. But
that is less than 0.1 percent of turnover.
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Pause for Discussion
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Questions
• How does Posen counter the argument against
new trade agreements that they will have the
same harmful effects as the NAFTA?
• Posen seems to accept the critics’ claim that the
NAFTA caused 45,000 job losses in the US per
year, but seems not to care. Why?
• What were some of the other claims by
critics of the NAFTA, and how does Posen
respond to them?
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100
Extra time?
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Class 19: Preferential Trading Arrangements
101