branko milanovic - global income inequality

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Global income inequality: the past two centuries and implications for 21 st century Branko Milanovic Branko Milanovic Autumn 2011 Email: [email protected] Based on the books Worlds Apart, 2005 and The Haves and the Have-Nots, 2010 and other updates

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Page 1: Branko Milanovic - Global Income Inequality

Global income inequality: the past two centuries and implications for 21st century

Branko MilanovicBranko Milanovic

Autumn 2011

Email: [email protected]

Based on the books Worlds Apart, 2005 and The Haves and the

Have-Nots, 2010 and other updates

Page 2: Branko Milanovic - Global Income Inequality

Main points

• Global inequality (between world citizens) is some 70

Gini point today

• This is the result obtained using new (2005) PPPs

• About 9 percent of world population receives one-

half of global income (or consumes ½ of goods and

services); bottom ½ gets 7%.services); bottom ½ gets 7%.

• Global inequality shows no clear trend in the last 20

years although China’s and India’s growth are

globally equalizing

• This is almost certainly the highest level of relative,

and certainly absolute, global inequality at any point

in human history

Page 3: Branko Milanovic - Global Income Inequality

Main points II

• The composition of global inequality has changed

from being driven by income differences within

countries (“class” differences) to income differences

between countries (“locational”)

• More than ¾ of global inequality due to between

country differencescountry differences

• About 60% of income dispersion “explained” by

country of citizenship

• Is citizenship a rent?

• Migration is the product of globalization and large

between country differences

Page 4: Branko Milanovic - Global Income Inequality

Global policy in this century

• Reduction in global inequality or citizenship premium

(penalty) can be achieved in three ways:

• Faster growth of poor countries

• Global redistribution (aid)

• Freer migration

• Large global inequality driven primarily by

“circumstances” (citizenship) is ethically

questionable and makes globalization less

sustainable

• Managing migration emerges as a key challenge

Page 5: Branko Milanovic - Global Income Inequality

1. Global inequalities today:

definitions and overviewdefinitions and overview

Page 6: Branko Milanovic - Global Income Inequality

Three concepts of inequality defined

Concept 1 inequality

Concept 2 inequality

Concept 3 (global) inequality

Page 7: Branko Milanovic - Global Income Inequality

Inequality 1950-2009The mother of all inequality disputes

Concept 2

Concept 3

.65

.75

Gin

i coeffic

ient

China moves in India moves in

With new PPPsGraph in interyd\dofiles\defines.do

Concept 1

.45

.55Gin

i coeffic

ient

1950 1960 1970 1980 1990 2000 2010year

Divergence

begins

Divergence ends

Page 8: Branko Milanovic - Global Income Inequality

International unweighted and population- weighted

inequality, 1952-2009

Concept 2

Concept 2 without China.6.6

5G

ini c

oe

ffic

ient in

pe

rce

nt

India as new

engine of

equalization

Graph in interyd\dofiles\defines.do; using gdppppreg.dta

Concept 1

.45

.5.5

5G

ini c

oe

ffic

ient in

pe

rce

nt

1950 1960 1970 1980 1990 2000 2010year

Page 9: Branko Milanovic - Global Income Inequality

What does Gini of 70 mean?

Brazil

World

.5.6

.7

twoway (scatter gini_disposable year if contcod=="SWE", c(l)) (scatter gini_disposable year if contcod=="USA“ , c (l)) (scatter gini_gross year if contcod=="BRA" & source=="SEDLAC", c(l) legend(off) text(0.30 2005 "Sweden") text(0.42 2004 "USA") text(0.63 2001 "Brazil")) (scatter gini_disposable year if contcod=="WRL", c(l) text(0.72 2005 "World"))Using data_voter_checked.dta to which I added the world from my global data

Sweden

USA

.2.3

.4

1970 1980 1990 2000 2010year

Page 10: Branko Milanovic - Global Income Inequality

What does Gini of 70 imply?To get to ½ of total income you need…

Almost 92 percent of the poorest

Or about 8 percent of the richest

The bottom 50% of the

population receives…

6.6 percent of total

income

The top 1% of

population receives…

About 13 percent of

total income

Thus 6 million top

people receive as

much as 3+ billion

poorest (ratio 500-1)

% of people who are 25

percent above or below

the median income is…

14 percent The world is as middle

class or less than

Panama.

Page 11: Branko Milanovic - Global Income Inequality

All three concepts using Theil (1) coefficient

Concept 2

Concept 3

.8.9

11

.1T

he

il(1

) co

eff

icie

nt

Graph in interyd\dofiles\defines.do; using gdppppreg.dta

Concept 2

Concept 1

.5.6

.7T

he

il(1

) co

eff

icie

nt

1950 1960 1970 1980 1990 2000 2010year

Page 12: Branko Milanovic - Global Income Inequality

All three concepts using market exchange rates, 1975-2009

Concept 2

Concept 3

.75

.8.8

5G

ini co

eff

icie

nt

Using two_concepts_exrate.do and global_new2.dta

Concept 1

.55

.6.6

5.7

Gin

i co

eff

icie

nt

1970 1980 1990 2000 2010year

Page 13: Branko Milanovic - Global Income Inequality

2. Methodological issues: PPPs,

National accounts vs. Household

surveys surveys

Page 14: Branko Milanovic - Global Income Inequality

The impact of new PPPs

• Concept 2 inequality increased by almost 10 Gini points (a level shift)

• Somewhat steeper decline of Concept 2 inequality in the last decade (because India and China now appear poorer)and China now appear poorer)

• About 5 Gini points increase in Concept 1 inequality (shift effect; no trend effect)

• About 5 Gini points increase in global inequality (Concept 2 increases more than Concept 3 smaller overlap as mean incomes “move” further apart)

Page 15: Branko Milanovic - Global Income Inequality

(cont.)

• World poorer than we thought, Asia in

particular

• Inequality (in all formulations) greater

• Growth rates not affected in WDI but will be • Growth rates not affected in WDI but will be

affected in PWT; so “the past will now

change” (like in Orwell)

• Two engines of “global equalization”: China

and India

Page 16: Branko Milanovic - Global Income Inequality

Pattern of change in estimated price levels: increases in poorer

and more populous countries (both highly sign. in a regression)

China

India

Zaire

Ethiopia

22

.53

ch

an

ge

in p

rice

leve

l

twoway (scatter price_level_change lngdpppp_old [w=totpop], yline(1)) (qfit price_level_change lngdpppp_old [w=totpop]), text(2.3 8.5 "China") text(1.7 7 "India") text(1.4 8.8 "Brazil") text(1.3 8.2 "IDN") text(3 6.5 "Zaire") text(2.35 6.5 "Ethiopia") ytitle(change in price level) xtitle(lngdppp before the change) legend(off)From graph2.do and world2002.dta

India

BrazilIDN

.51

1.5

ch

an

ge

in p

rice

leve

l

6 7 8 9 10 11lngdppp before the change

Page 17: Branko Milanovic - Global Income Inequality

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1.5

22.5

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new

price level over old

price level

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Page 18: Branko Milanovic - Global Income Inequality

Methodological issues internal to the surveys

• Household surveys: income or expenditures

(consumption)?

• The problem: countries and regions “specialize” in either Y or X surveys; impossible to do global poverty or inequality work if one wanted to stick to only Y or X welfare aggregate

• Even if one HS welfare indicator is chosen, definitions • Even if one HS welfare indicator is chosen, definitions of X,Y vary in time & between countries

• Issues: self-employed Y; home consumption; imputation of housing; treatment of publicly provided H&E; under-estimation of property incomes

• What PPP to use (Geary-Khamis, EKS, Afriat)?

• Equivalence scales & intra-HH inequality

Page 19: Branko Milanovic - Global Income Inequality

Use GDP?

• GDP is not a counterpart of

HS net income (even less of

HS consumption)

• There is no NA counterpart

to HS income

Use personal consumption?

• Similar aggregates

• Definitional difference:

imputed housing (but

not always), NGO

External methodological issue: can NA

means be used instead of HS means?

to HS income

• Definitional difference:

undistributed π, VA from

financial intermediation

(FISIM), build-up of stocks,

state-funded health &

education, gov’t services

not always), NGO

consumption

Measurement difference btw NA and HS: non-compliance of the

rich; underestimation of property incomes; top coding

Page 20: Branko Milanovic - Global Income Inequality

The gap between GDP and measured HS mean is thus

composed of ..

• The definitional gap between GDP per capita and “true” HS mean: (*) undistributed π; (*) FISIM; health and education

• Measurement gap: (*) under-surveying of the rich; (*) under-reporting of property income; (*) top (*) under-reporting of property income; (*) top coding

• The gap is not distribution-neutral

• All (*) are pro-rich (i.e., reduce measured ineq.)

• So simple allocation of the gap to everybody according to their HS income share cannot be right

Page 21: Branko Milanovic - Global Income Inequality

• Deaton: "Using survey shares to allocate NAS [National account consumption or GDP] to the poor and non-poor assumes that these items are distributed between the poor and non-poor in the same way as are the goods measured in the survey, an assumption that cannot possibly be true" ("Measuring poverty in a growing world...")

• US inequality may be underestimated by as much as 4 Gini points or 10% on account of lower

• US inequality may be underestimated by as much as 4 Gini points or 10% on account of lower participation of the rich (Korinek, Mistiaen, Ravallion, 2006)

• Property incomes (compared to NA) generally underestimated by ½ and these incomes are received by the rich

• Top coding reduces the share of the top ventile between 2 and 6%, or up to 1 Gini point (EU data)

Page 22: Branko Milanovic - Global Income Inequality

Thus…

• Scaling up with GDP per capita biases both poverty and inequality down

• It is a paper redistribution—”there will not be any poor if we assume all the poor to be rich”

• Meanwhile, the gap between GDP and HS means has been rising

• India: cause célѐbre; growth rate from NSS several • India: cause célѐbre; growth rate from NSS several percentage points lower than GDP per capita growth rate (Banerji and Piketty find that 40% of the gap is due to unrecorded income of the top percentile)

• The cause of the increasing gap not well understood; both definitional and measurement issues are probably driving it

Page 23: Branko Milanovic - Global Income Inequality

Income or consumption in HS diverge more and more from GDP (not necessarily HH consumption)

data in National Accounts

GDPs pc all countries

GDPs pc countries in HS sample

HS means--countries in HS sample

.6.6

2.6

4

In 2005, the gap is almost 4 Gini points; in 1993, it was less than ½ point

Using gdppppreg.dta and defines.do

.54

.56

.58

Gin

i

1990 1995 2000 2005 2010year

Page 24: Branko Milanovic - Global Income Inequality

Example I: China: HS coverage is okay but HH consumption is a decreasing share of GDP

From the_triangle.xls

Page 25: Branko Milanovic - Global Income Inequality

Example II: India: both coverage of consumption and its share in GDP are decreasing

From the_triangle.xls

Page 26: Branko Milanovic - Global Income Inequality

Example III: USA: both coverage of consumption and share of consumption in GDP are stable at 70%

From the_triangle.xls

Page 27: Branko Milanovic - Global Income Inequality

3. International and global

inequality todayinequality today

Page 28: Branko Milanovic - Global Income Inequality

Why is increased Concept 1 inequality

important?• During globalization, convergence was supposed to

happen particularly since there was also convergence

in policies and institutions

• Income divergence (σ divergence) led to the

reassessment of neoclassical growth theory and

formulation of endogenous growthformulation of endogenous growth

• Putting “endogenously-created”, non-rival but

excludable technology and increasing returns to

scale at the center-stage, “explains” divergence but

sends a bleak picture about the ultimate likelihood

of poor countries’ catch-up

Page 29: Branko Milanovic - Global Income Inequality

Two origins of endogenous growth theory

according to Romer (1994)

• (a) No unconditional convergence in income

across countries

• (b) Inability of the neoclassical model to

generate growth within itselfgenerate growth within itself

(a) led to the introduction of increasing returns

to scale

(b) led to endogenous technology

Page 30: Branko Milanovic - Global Income Inequality

The difficulty of intuition re. evolution of

Concept 3 inequality stems from

contradictory movements

(1) Greater inequality within nations

(2) Greater differences between countries’

mean incomes (unconditional divergence

between 1980 and 2000)between 1980 and 2000)

(3) But catching up of large and poor countries

(China and India)

All of these forces determine what happens to

GLOBAL INEQUALITY (but they affect it

differently)

Page 31: Branko Milanovic - Global Income Inequality

Population coverage

1988 1993 1998 2002 2005

Africa 48 76 67 77 78

Asia 93 95 94 96 94

E.Europe 99 95 100 97 93

LAC 87 92 93 96 96

WENAO 92 95 97 99 99

World 87 92 92 94 93

Non-triviality of the omitted countries (Maddison vs. WDI)

Page 32: Branko Milanovic - Global Income Inequality

GDI (US dollar) coverage

1988 1993 1998 2002 2005

Africa 49 85 71 71 70

Asia 94 93 96 95 90

E. Europe 99 96 100 99 99

LAC 90 93 95 95 98

WENAO 99 96 96 100 100

World 96 95 96 98 97

Page 33: Branko Milanovic - Global Income Inequality

Number of surveys (C-based)

1988 1993 1998 2002 2005

Africa 14(11) 30(27) 24(24) 29(29) 32(30)

Asia 19(10) 26(18) 28(20) 26(18) 23(16)

EEurope 27(0) 22(0) 27(14) 25(16) 27(25)

LAC 19(1) 20(4) 22(2) 21(1) 18(0)

WENAO 23(0) 23(0) 21(3) 21(2) 22(0)

World 102(22) 121(52) 122(63) 122(66) 122(71)

Page 34: Branko Milanovic - Global Income Inequality

1988 1993 1998 2002 2005

International dollars

Gini

index

68.3

(2.0)

69.9

(1.4)

69.4

(1.8)

70.6

(1.3)

69.7

(1.4)

Global inequality (with 2005 PPPs)(distribution of persons by $PPP or US$ income per capita)

index (2.0) (1.4) (1.8) (1.3) (1.4)Between

component61.6 62.3 61.7 63.0 61.5

US dollars

Gini

index

77.8

(1.5)

80.4

(1.4)

79.6

(1.3)

81.0

(1.1)

79.8

(1.1)

Page 35: Branko Milanovic - Global Income Inequality

10,0

20,0

30,0

40,0

Losers and winners of globalization:

Change in real income between 1988 and 2005 at various percentiles of global income distribution (in 2005 international dollars)

-30,0

-20,0

-10,0

0,0

10,0

0 10 20 30 40 50 60 70 80 90 100

Perc

en

t

From forpogge.xls

Page 36: Branko Milanovic - Global Income Inequality

More than fifty-fifty world (2005; new PPPs)

Cumulative % of world

population

Cumulative % of PPP world

income/consumption

In a single

country

(Germany 05)

5 0.14 1.3

10 0.44 3.3

25 1.9 11.1

50 6.6 28.9

80 25.0 60.1

90 45 75

Top 10 55 25

Top 5 36.5 18.4

Top 1 13.4 5.8

Page 37: Branko Milanovic - Global Income Inequality

Some incendiary statistics: income of the richest expressed in income of the millions of poorest

4275

2500

3000

3500

4000

4500

70224

640

1606

0

500

1000

1500

2000

Annual operating budgets of IMF,

WB

Goldman Sachs bonus 2009

400 richest Americans '06

1% of richest Americans '05

1 % of richest people in the

world

From 2005_percentiles.xls

Page 38: Branko Milanovic - Global Income Inequality

4. International and global

inequality in the long-run: inequality in the long-run:

1850-2010

Page 39: Branko Milanovic - Global Income Inequality

Concept 1 inequality in historical perspective:

Convergence/divergence during different

economic regimes (based on Maddison)

50

60

70

FIRST GLOBALIZATION DEGLOBALIZATION WAR DEVELOPMENTAL STATE

NEOLIBERAL

0

10

20

30

40

1820 1870 1890 1900 1913 1929 1938 1952 1960 1978 2000

Gini

Theil

From thepast.xls

Page 40: Branko Milanovic - Global Income Inequality

A non-Marxist world

• Over the long run, decreasing importance of within-country inequalities despite some reversal in the last quarter century

• Increasing importance of between-country • Increasing importance of between-country inequalities (but with some hopeful signs in the last five years, before the current crisis),

• Global division between countries more than between classes

Page 41: Branko Milanovic - Global Income Inequality

Composition of global inequality changed: from being mostly

due to “class” (within-national), today it is mostly due to

“location” (where people live; between-national)

Based on Bourguignon-Morrisson (2002) and Milanovic (2005)From thepast.xls

Page 42: Branko Milanovic - Global Income Inequality

Global proletariat and global

bourgeoisie (then)• “We are for Free Trade, because by Free Trade

all economical laws, with their most astounding contradictions will act upon a larger scale, upon a greater extent of territory, upon the territory of the whole earth; and because from the uniting of the whole earth; and because from the uniting of all these contradictions into a single group where they stand face to face, will result the struggle which will itself eventuate in the emancipation of the proletariat. “ (Engels in 1847)

Page 43: Branko Milanovic - Global Income Inequality

But the situation has changed today!

It is location much more than class that matters

Page 44: Branko Milanovic - Global Income Inequality

Population according to income of country where they

live (2009): Where is the middle class?

India, Indonesia

China

20

30

Pe

rce

nt

See defines.do ifor use with gdppppreg.dta

Brazil, Mexico, Russia W.Europe, JapanUSA

01

0P

erc

en

t

0 10000 20000 30000 40000 50000GDP per capita in 2005 PPP

Page 45: Branko Milanovic - Global Income Inequality

Different countries and income classes in global

income distribution in 2005 (new PPP)

USA

Russia60

70

80

90

100

perc

entile

of

world incom

e d

istr

ibution

From michele_graph.txt

China

Brazil India

110

20

30

40

50

60

perc

entile

of

world incom

e d

istr

ibution

1 5 10 15 20country ventile

Page 46: Branko Milanovic - Global Income Inequality

And for Spain…

Germany

China

Mexico

Spain

60

80

100

perc

entile

of w

orl

d inco

me d

istr

ibutio

n

China

Ivory Coast

02

04

0p

erc

entile

of w

orl

d inco

me d

istr

ibutio

n

1 5 10 15 20country ventile

Page 47: Branko Milanovic - Global Income Inequality

• Almost non-overlapping distributions of India and the US: less than 5% of people in India richer than the poorest ventile in the US

• But this is not true for Brazil, China and Russia: about half of the population of Brazil better off than the very poorest ventile in the US; for Russia, it is ¾, for China 1/5.

• Brazil within itself spans the entire global distribution• Brazil within itself spans the entire global distribution

• China dominates India at any point of income distribution

• Russians better-off than Brazilians except at the top (note convexity at the top in Brazil)

Page 48: Branko Milanovic - Global Income Inequality

Indian, Chinese and American distributions, 2008 $PPP

China

India1

50

02

00

0

twoway (kdensity loginc [w=popu] if contcod=="CHN", area(1325)) (kdensity loginc [w=popu] if contcod=="IND", area (1139)) (kdensity loginc [w=popu] if loginc>1 & contcod=="USA", area(304)), legend(off) xtitle(income in PPP dollar logs) text(1200 3.5 "China") text(390 4.5 "USA") text(2000 3 "India")

China

USA

05

00

10

00

1 2 3 4 5income in PPP dollar logs

Page 49: Branko Milanovic - Global Income Inequality

How do overlapping distributions (with similar mean incomes) look? 2008

USA

300

400

twoway (kdensity loginc [w=popu] if contcod=="DEU", area(82)) (kdensity loginc [w=popu] if contcod=="ESP", area (44)) (kdensity loginc [w=popu] if loginc>1 & contcod=="USA", area(304)), legend(off) xtitle(income in PPP dollar logs) text(150 4.2 "Germany") text(330 4.5 "USA") text(80 4.3 "Spain")

Germany

Spain

0100

200

3 3.5 4 4.5 5 5.5income in PPP dollar logs

Page 50: Branko Milanovic - Global Income Inequality

Nominal wage divided by food cost of living(March 2009, by effective hour of work)

Building laborer

Skilled worker Engineer

NYC 16.6 29.0 26.5

London 15.4 30.4 35.2

Beijing 1.3 3.8 9.5

Delhi 1.7 6.9 9.1

Nairobi 1.5 4.7 9.2

Rich/poor 11-1 5-1 3-1

Page 51: Branko Milanovic - Global Income Inequality

5. Three implications of high

international and global inequality

a. no-catch up of poor countries

b. no global equality of opportunity

c. need for impediments to migration

Page 52: Branko Milanovic - Global Income Inequality

Global inequality of opportunity

• How much of variability of income globally can we

explain with two circumstances (Roemer) only:

person’s country of citizenship and income class of

his/her parents?

• Both circumstances basically given at birth• Both circumstances basically given at birth

• With citizenship person receives several public goods:

income of country, its inequality level, and its

intergenerational income mobility

• Use HS data to investigate that

Page 53: Branko Milanovic - Global Income Inequality

Income as function of circumstance

and effort (most general)

);;...;( 11

.... ijij

n

ijij

m

jjij uEfy γγαα=

α = country circumstances 1 to m (mean income, α = country circumstances 1 to m (mean income,

Gini, mobility)

γ = individual circumstances 1 to n (parental income

class, gender, race)

Ei = individual effort

ui = luck (random term)

Page 54: Branko Milanovic - Global Income Inequality

Estimation

ijijjjij CbGbmbby ε++++= 3210

mj = mean country income

Gj = Gini coefficient

Cij = income class of i-th individual in j-th countryCij = income class of i-th individual in j-th country

The issue: How to substitute parental income class

(Cij*) for own income class (Cij), and thus have the

entire regression account for the effect of

circumstances only?

Run over income ventiles for 116 countries and

2320 (20 x 116) income levels (yij)

Page 55: Branko Milanovic - Global Income Inequality

• Citizenship premium. If mean income of country where you live increases by 10%, your income goes up by about 10% too.

• Parental premium. If your parents are one income class higher, your income increases by about 10.5% on average.

• Global equality of opportunity? Country of • Global equality of opportunity? Country of citizenship explains 60% of variability in global income. Citizenship and parental income class combined explain more than 80%.

• For comparison: 4 circumstances (place of birth, parents, ethnicity, age) explain 40% of wage inequality in the US (N. Pistolesi, JofEI, 2009)

Page 56: Branko Milanovic - Global Income Inequality

The XXI century trilema

A. Globalization of ideas,knowledge,Communication, awareness of others’ living standards

B. Increasing differences in mean incomes

among countries

C. No movement of people

If A and B, then no C. Migration is the outcome of current unequal globalization. If B and C, then no A. Unequal globe can exist if people do not know much about each other’s living conditions or costs of transport are too high.If A and C, then no B. Under globalization, people will not move if income differentials are small.

Page 57: Branko Milanovic - Global Income Inequality

Growing inter-country income differences and migration:

Key seven borders today

Page 58: Branko Milanovic - Global Income Inequality

The key borders today

• First to fourth world: Greece vs. Macedonia

and Albania; Spain vs. Morocco (25km),

Malaysia vs. Indonesia (3km)

• First to third world: US vs. Mexico• First to third world: US vs. Mexico

• The remaining three key borders walled-in or

mined: N. Korea—S. Korea; Yemen—Saudi

Arabia; Israel---PalestineIn 1960, the only key borders were Argentina and Uruguay (first) vs. Brazil,

Paraguay and Bolivia (third world), and Australia (first) vs. Indonesia (fourth)

Page 59: Branko Milanovic - Global Income Inequality

Year 2007 Year 1980

Approximate % of

foreign workers in labor

force

Ratio of real GDI per capita

Greece

(Macedonian/

Albanians)

7.5 4 to 1 2.1 to 1

Spain 14.4 7.4 to 1 6.5 to 1Spain

(Moroccans)

14.4 7.4 to 1 6.5 to 1

United States

(Mexicans)

15.6* 3.6 to 1 2.6 to 1

Malaysia

(Indonesians)

18.0 3.7 to 1 3.6 to 1

* BLS, News Release March 2009; data for 2008 inclusive of undocumented aliens.

Page 60: Branko Milanovic - Global Income Inequality

6. Les jeux sont faits

when you are born?when you are born?

Page 61: Branko Milanovic - Global Income Inequality

Is citizenship a rent?

• If most of our income is determined by

citizenship, then there is little equality of

opportunity globally and citizenship is a rent

(unrelated to individual desert, effort)

• How much is citizenship worth? Black-market

UK passports sold for about £5,000; legally

purchase citizenship for about $1m in

investment.

• See also A. Shachar, The Birthright Lottery

Page 62: Branko Milanovic - Global Income Inequality

The logic of the argument

• Global inequality between individuals in the world is very high (Gini=70)

• Most of that inequality is “explained” by differences in countries’ per capita incomes

• Citizenship “explains” some 60% of variability in personal incomes globally (assessed across personal incomes globally (assessed across national ventiles)

• This was not the case in the past (around 1850-70) when within-national inequalities “explained” most of global inequality

• Citizenship as a significant factor explaining one’s income

Page 63: Branko Milanovic - Global Income Inequality

The logic of the argument (cont.)

• Citizenship is a morally-arbitrary circumstance, independent of individual effort

• It can be regarded as a rent (shared by all members of a community)members of a community)

• Are citizenship rents globally acceptable or not?

• Political philosophy arguments pro (social contract; statist theory) and contra

Page 64: Branko Milanovic - Global Income Inequality

7. Global inequality and the Rawlsian world Rawlsian world

Page 65: Branko Milanovic - Global Income Inequality

Rawls from A Theory of Justice

• “Injustice is…simply inequalities that are not to the benefit of all…and in particular to the poor” (p. 54)

• But this is the rule enounced for a single • But this is the rule enounced for a single nation-state? Will it be valid for the world as a whole?

• As we shall see: No, it won’t be!

Page 66: Branko Milanovic - Global Income Inequality

Rawls on (a) inequality between countries and (b) global inequality

• Neither of them matters

• Concept 1 (divergence) is irrelevant if countries have liberal institutions; it may be relevant for liberal vs. burdened societies

• Irrelevance rooted in two key assumptions: (i) political institutions of liberalism are what matters;

• Irrelevance rooted in two key assumptions: (i) political institutions of liberalism are what matters; (ii) acquisition of wealth immaterial for both individuals and countries

• Global inequality between individuals similarly irrelevant once the background conditions of justice exist in all societies

• But within-national inequalities matter because the difference principle applies within each people (note however that the DP may allow for high inequality)

Page 67: Branko Milanovic - Global Income Inequality

Rawls on irrelevance of material wealth for a “good society” and global optimum

• It is a mistake to believe that a just and good society must wait upon a high material standard of life. What men want is meaningful work in free associations with others, these associations regulating their relations to one another within a framework of just basic institutions. To achieve this state of things great wealth is not necessary. In fact, beyond some point it is more necessary. In fact, beyond some point it is more likely to be a positive hindrance, a meaningless distraction at best if not a temptation to indulgence and emptiness. ( A Theory of Justice, Chapter V, §44, pp. 257-8).

• For Rawls, global optimum distribution of income is simply a sum of national optimal income distributions (my interpretation)

Page 68: Branko Milanovic - Global Income Inequality

• In Gini terms:

LppyypG j

n

ij

iij

n

i

n

i

iii +−(+ ∑∑∑>=

)1

1 µπ

Go back to our definition of global inequality

Term 2

Rawls would insist of the minimization of each individual Gini (Gi) so that Term 1 (within-inequality) would be minimized. But differences in mean incomes between the countries can take any value. Term 2 (between inequality) could be very high.

And this is exactly what we observe in real life. Term 2 accounts for 85% of global Gini.

Term 1 Term 2

Page 69: Branko Milanovic - Global Income Inequality

All equal Different (as now)

All equal

Mean country incomes

Individual incomes within country

Global Ginis in Real World, Rawlsian World, Convergence World…and Shangri-La World

61.5 (all country

0

Different (as now)

69.7

(all country Ginis=0)

45.6 (all mean incomes same; all country Ginis as now)

Page 70: Branko Milanovic - Global Income Inequality

Why pace Rawls global inequality matters?

• Because the world is becoming globalized and global inequality will come to matter more and more despite the absence of global government (analogy with national global government (analogy with national vs. village inequality)

• Because it is associated with migration which is fast becoming a prime political issue

• Because it raises the issue of global equality of opportunities

Page 71: Branko Milanovic - Global Income Inequality

Conclusion and 21st century policy issues

• To reduce significantly global inequality (and poverty) and citizenship rent there are two ways:

• A slow and sustainable way: higher growth rate of poorer countries

• A fast and possibly politically tumultous way: increase migrationincrease migration

• Either poor countries will have to become richer or poor people will move to rich countries.

• Should migrants be taxed additionally to pay native population’s losers and those remaining in their countries of origin?

Page 72: Branko Milanovic - Global Income Inequality

8. Does Global Inequality Matter:

Statists, Consequntialists and

CosmopolitansCosmopolitans

EXTRA

Page 73: Branko Milanovic - Global Income Inequality

Rawls’ The Law of Peoples

• Types of peoples (nations)

– Liberal }

– Decent (consultative hierarchy) }

– “Burdened”

Well-

ordered– “Burdened”

– Outlaw states

– Benevolent absolutism

Transfers only from well-ordered to “burdened” peoples

Page 74: Branko Milanovic - Global Income Inequality

• Transfers (1) limited to type of society (‘burdened’) and (2) limited in time (until ‘burdened’ becomes a ‘decent society’)

• “Peoples have a duty to assist other peoples living under unfavorable conditions that prevent their having a just or decent political and social regime” (LoP, p. 37)

• Explicit rejection of a global difference principle • Explicit rejection of a global difference principle (among other reasons because it is unlimited in time)

• No discussion of responsibility toward outlaw or hierarchical societies

• Limits to immigration (duty of hospitality only)

Page 75: Branko Milanovic - Global Income Inequality

Why no global difference principle

• It would lead to open-ended transfers

• Real income per capita (wealth) is not important once societies become ‘decent’ (general proposition re. unimportance of pursuit of wealth)

• Once a people is ‘decent’ there is no point in • Once a people is ‘decent’ there is no point in comparing wealth/income of the two peoples: the differences are the outcome of voluntary societal decisions on savings vs. consumption and leisure vs. work

Page 76: Branko Milanovic - Global Income Inequality

Cosmopolitan position (Pogge, Singer)

• No major difference between Rawlsian original position within a single nation-state (people) and the world

• The same principles should apply globally: an increase in inequality is acceptable only if it leads to increase in inequality is acceptable only if it leads to a higher absolute income of the poorest

• “Monism”: all ethically meaningful relationships are between individuals not mediated by the state (people)

• Pogge: we are required not to harm others (and some decisions by IO may have harmful consequences)

Page 77: Branko Milanovic - Global Income Inequality

Rejection of cosmopolitanism: political

theory of justice (Nagel)• Strong statism: Redistribution (and responsibility for

poverty) possible only if there is shared government

• For concerns of justice to kick in, you need “associative relation” (shared sovereignty, common endeavor)endeavor)

• We redistribute because we have a contractarian relationship with people with whom we share the same institutions

• Could be also based on our expectation to be in need of similar transfers in the future; or affinity that we feel for co-citizens; shared culture or historical memories (J.S. Mill)

Page 78: Branko Milanovic - Global Income Inequality

Statism (cont.)

• Only under world government can we have a global

difference principle

• Accepts humanitarian duties only (matter of morality,

not of justice)

• Existence of IO does not introduce new obligations

because these are govt-to-govt relationsbecause these are govt-to-govt relations

• Pluralism (rather than monism) in our relations with

others: different normative principles depending on

the position in which we stand with respect to them;

but pluralism may introduce a sliding scale & an

intermediate position =>

Page 79: Branko Milanovic - Global Income Inequality

Intermediate position

• We are required to give more than implied by humanitarian considerations alone but less than implied by the global difference principle

• Sliding scale of responsibility

• Critique of statism: why are newer forms of • Critique of statism: why are newer forms of international governance not norm-generative and only state is?

• There are forms of connection that do not involve the state & trigger norms beyond mere humanitarianism

• Direct rule-making relationship (WTO, IMF) between the global bodies and citizens of different states

Page 80: Branko Milanovic - Global Income Inequality

Intermediate position (cont.)

• Aristotle: within each community there is philia

(affection; goodwill) but the philia spreads (diminishes) as in concentric circles as we move further from a very narrow community

• To each philia corresponds adequate reciprocity (that is, redistribution)(that is, redistribution)

• Thus the sliding scale of philia and reciprocity

Page 81: Branko Milanovic - Global Income Inequality

What is a “consequential relationship”?

• Obviously, a political relationship is consequential (Nagel)

• But also economic relationships reflected in trade, investment of capital etc (Julian: “economistic” definition of consequential relationship)definition of consequential relationship)

• Beitz: (1) interrelationship must reach a certain threshold, (2) there are global non-voluntary institutions in which different peoples belong ▬►institutional conditions under which considerations of global justice kick in

Page 82: Branko Milanovic - Global Income Inequality

• Decisions made by international organizations

(even if only states are signatories) and by

global networks => imply inclusion of all and

duty of wider assistance (Cohen & Sobel)

• Institutional explanation applies not only to

global institutions but to “institutional clubs” global institutions but to “institutional clubs”

like the Commonwealth, European Union,

Communauté Française etc. Sliding scale of

responsibility (within institutional

explanation)

Page 83: Branko Milanovic - Global Income Inequality

Among whom does the duty of assistance exist?

A menu for you to choose from!

Political conception of

justice

Consequentialist Cosmopolitan

Political Rawls Economistic Institutional

Among Political + Among people Among people Among all Among

people

who

share a

governm

ent

Political +

burdended

societies

Among people

who have

dense

economic

relations

Among people

who share

global

governance

institutions

Among all

people in the

world

Page 84: Branko Milanovic - Global Income Inequality

• “Worlds Apart: Measuring International and

Global Inequality”, Princeton UP, 2005.

• “The haves and the have-nots: A short and

idiosyncratic history of inequality”, Basic idiosyncratic history of inequality”, Basic

books, 2010

• Email: [email protected]

• Website: http://econ.worldbank.org/projects/inequality

Page 85: Branko Milanovic - Global Income Inequality

Extras

Page 86: Branko Milanovic - Global Income Inequality

Brazil, Mexico and Argentina quasi-disposable income inequality, 1980-2005 (SEDLAC and

some LIS data)

Brazil

Mexico

.55

.6.6

5L

IS;

for

SE

DL

AC

fro

m G

as

pa

rin

i

This is gross income but with payroll taxes deducted at source. All calculated from micro data.

Argentina

.45

.5.5

5L

IS;

for

SE

DL

AC

fro

m G

as

pa

rin

i

1980 1990 2000 2010year

Page 87: Branko Milanovic - Global Income Inequality

Global percentile positions (income levels in $PPP) in Denmark and selected African countries

Denmark

Mali

Uganda

50

60

70

80

90

10

0p

erc

en

tile

of w

orl

d in

co

me

dis

trib

utio

n

Based on B. Milanovic, Worlds Apart: Measuring International and Global Inequality

Mozambique

Mali

Tanzania

11

02

03

04

05

0p

erc

en

tile

of w

orl

d in

co

me

dis

trib

utio

n

1 5 10 15 20country ventile

Page 88: Branko Milanovic - Global Income Inequality

Rich man’s crisis? 2009 GDP per capita growth against 2008 GDP per capita levels (with population weights)

0.1

gro

wth

rate

in 2

009

twoway (scatter gdpgrth lgdpppp [w=pop] if year==2009 & gdpppp<50000 & gdpppp>500, yline(0) xscale(log) xlabel( 2000 5000 10000 30000) msymbol(circle_hollow)) (qfit gdpgrth gdpppp [w=pop] if year==2009 & gdpppp<50000, legend(off) xtitle(GDP per capita in 2005 PPP year 2008) ytitle(growth rate in 2009))Using gdpppp.dta

-.2

-.1

gro

wth

rate

in 2

009

2000 5000 10000 30000GDP per capita in 2005 PPP year 2008

Page 89: Branko Milanovic - Global Income Inequality

The crisis that was not?People’s and plutocratic growth rates, 1952-2009

people's

.05

.1

Using gdppppreg,dta and defines.do

plutocratic

-.05

0

1950 1960 1970 1980 1990 2000 2010year