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More About This Textbook
Overview
We are used to thinking about inequality within countries—about rich Americans versus poor Americans, for instance. But what about inequality between all citizens of the world? Worlds Apart addresses just how to measure global inequality among individuals, and shows that inequality is shaped by complex forces often working in different directions. Branko Milanovic, a top World Bank economist, analyzes income distribution worldwide using, for the first time, household survey data from more than 100 countries. He evenhandedly explains the main approaches to the problem, offers a more accurate way of measuring inequality among individuals, and discusses the relevant policies of firstworld countries and nongovernmental organizations.
Inequality has increased between nations over the last half century (richer countries have generally grown faster than poorer countries). And yet the two most populous nations, China and India, have also grown fast. But over the past two decades inequality within countries has increased. As complex as reconciling these three data trends may be, it is clear: the inequality between the world's individuals is staggering. At the turn of the twentyfirst century, the richest 5 percent of people receive onethird of total global income, as much as the poorest 80 percent. While a few poor countries are catching up with the rich world, the differences between the richest and poorest individuals around the globe are huge and likely growing.
Editorial Reviews
Toronto Globe and Mail
Branko Milanovic makes a difficult subject remarkably accessible. His expertise and intellectual integrity inform every page.
— Thomas HomerDixon
Ethics and International Affairs
Worlds Apart offers a thorough description of relative inequalities in the world, and does so by setting research quality standards to which future studies should be held.
— Camelia Minouiu
Times Higher Education Supplement  Huw Dixon
The history of world inequality is a fascinating subject, and Branko Milanovic's very readable book uses this as a backdrop to explain the problems of measuring inequality when we look across different countries. . . . [I]t is certainly an interesting read.Toronto Globe and Mail  Thomas HomerDixon
Branko Milanovic makes a difficult subject remarkably accessible. His expertise and intellectual integrity inform every page.Ethics & International Affairs  Camelia Minouiu
Worlds Apart offers a thorough description of relative inequalities in the world, and does so by setting research quality standards to which future studies should be held."The Globe and Mail mas HomerDixon
A lead economist at the World Bank, Branko Milanovic has written probably the most comprehensive, thorough and balanced assessment yet of global inequality. . . . Milanovic makes a powerful and distressing argument for the intractability of inequality. His expertise and integrity inform every page.
From the Publisher
One of Choice's Outstanding Academic Titles for 2005"The history of world inequality is a fascinating subject, and Branko Milanovic's very readable book uses this as a backdrop to explain the problems of measuring inequality when we look across different countries. . . . [I]t is certainly an interesting read."—Huw Dixon, Times Higher Education Supplement
"A lead economist at the World Bank, Branko Milanovic has written probably the most comprehensive, thorough and balanced assessment yet of global inequality. . . . Milanovic makes a powerful and distressing argument for the intractability of inequality. His expertise and integrity inform every page."—Thomas HomerDixon,The Globe and Mail
"Branko Milanovic masterfully explores standard and new measures of income inequality among nations and among individuals, extraterritorially. . . . The work should be required reading for anyone involved in social and economic research and policy relating to income inequality worldwide."—Choice
"Branko Milanovic makes a difficult subject remarkably accessible. His expertise and intellectual integrity inform every page."—Thomas HomerDixon, Toronto Globe and Mail
"Worlds Apart offers a thorough description of relative inequalities in the world, and does so by setting research quality standards to which future studies should be held."—Camelia Minouiu, Ethics and International Affairs
The Globe and Mail
A lead economist at the World Bank, Branko Milanovic has written probably the most comprehensive, thorough and balanced assessment yet of global inequality. . . . Milanovic makes a powerful and distressing argument for the intractability of inequality. His expertise and integrity inform every page.Toronto Globe & Mail
Branko Milanovic makes a difficult subject remarkably accessible. His expertise and intellectual integrity inform every page.— Thomas HomerDixon
Times Higher Education Supplement
The history of world inequality is a fascinating subject, and Branko Milanovic's very readable book uses this as a backdrop to explain the problems of measuring inequality when we look across different countries. . . . [I]t is certainly an interesting read.— Huw Dixon
Choice
Branko Milanovic masterfully explores standard and new measures of income inequality among nations and among individuals, extraterritorially. . . . The work should be required reading for anyone involved in social and economic research and policy relating to income inequality worldwide.Ethics & International Affairs
Worlds Apart offers a thorough description of relative inequalities in the world, and does so by setting research quality standards to which future studies should be held.— Camelia Minouiu
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Meet the Author
Branko Milanovic is Lead Economist in the World Bank research department, working on income inequality and poverty. The author of "Income, Inequality, and Poverty during the Transition" and the coauthor of "Income and Influence: Social Policy in Emerging Market Economies", he is currently an associate scholar with the Carnegie Endowment for International Peace and a visiting professor at the School for Advanced International Studies, Johns Hopkins University.
Read an Excerpt
Worlds Apart
Measuring International and Global InequalityBy Branko Milanovic
Princeton University Press
Copyright © 2005 Princeton University PressAll right reserved.
Chapter One
THE THREE CONCEPTS OF INEQUALITY DEFINEDTHERE are three concepts of world inequality that need to be sharply distinguished. Yet, they are often confounded; even the terminology is unclear. So, we shall now first define them and give them their proper names.
The first (Concept 1) is unweighted international inequality. This concept takes country as the unit of observation, uses its income (or GDP) per capita, disregards its population, and thus compares, as it were, representative individuals from all the countries in the world. It is a kind of UN General Assembly where each country, small or large, counts the same. Imagine a world populated with ambassadors from some 200 countries, each of whom carries a sign on which is written the GDP per capita of his/her country. These ambassadors are then ranked from the poorest to the richest, and a measure of inequality is calculated across such ranking of nations (ambassadors). Note that this is properly a measure of international inequality, since it is compares countries. It is "unweighted" because each country counts the same. Concept 1 is not a measure of inequality among citizens of the world.
Since it is reasonable to hold that if China becomes richer, this event should have more impact on the world than if Mauritania were to become so, we come tothe second type of inequality (Concept 2): populationweighted international inequality, where we still assume that everyone in a country receives the same income but the number of representative individuals from each country reflects its population size. Note that this is still international inequality because we compare mean incomes among nations, but it is now weighted by the population of each country. The difference when compared to Concept 1 is that the number of ambassadors from each country in our fictional assembly is proportional to the country's population. Otherwise, everything else is the same: each ambassador carries a sign with the GDP per capita of his/her country, and income ranksa concept crucial in the calculation of every inequality measureare the same. Concept 2 assumes that "withincountry" distribution is perfectly equal: all Chinese have the same mean income of China, all Americans, the mean income of the United States, etc. This is the distribution that is often billed as "world" income distribution (e.g., Melchior et al. 2000), but, as we have just seen it is not.
Concept 2 is only a halfway house to the calculation of a true world income distribution (Concept 3), where inequality is calculated across all individuals in the world. Concept 3 treats, in principle, everybody the same. We no longer have ambassadors from the countries: we line up all individuals, regardless of the country, from the poorest to the richest. Now, Chinese individuals will no longer be crowded together: the poor Chinese will mix with poor Africans, the rich Chinese with the middleclass or rich Americans, and a few rich Africans may even mix with the U.S. "top dogs." If one thinks that this is impractical because we cannot array all 6 billion individuals, one is right. But what we can do, as we would in any household survey, is interview individuals or households selected in a worldwide random sample (such that the Chinese will have a chance to be selected proportionally to their population size), and rank all such individuals from the poorest to the richest. World distribution (Concept 3) goes back to the individual as the unit of analysis, ignoring country boundaries.
In terms of Jan Pen's (1971) parade, which is similar to the idea of our fictional assembly but where in addition the height of each individual is proportional to his income, in Concept 1, only countries' ambassadors parade, each having the height of that country's GDP per capita. The number of participants in such a parade is small: at most 180200, as many persons as there are countries in the world. In Concept 2, each country has a number of participants proportional to its population. Thus if the entire parade consists of 1000 people, China would have some 200 participants, and Luxembourg 1/150 of a participant, but all participants from a given country have the same heightequal to that country's GDP per capita. In Concept 3, the number of participants from each country remains as in Concept 2, but the participants' height now reflects their true income: there are tall and short Chinese just as there are tall and short Americans.
The idea of the parade is illustrated in figure 1.1, where we suppose that there are three countries with different average incomes given by the height of each individual in the top row. Concept 1 inequality is calculated across them. In the second row, we let each country be represented by all of its population. The poorest county has five people (men with briefcases), the middleincome country has two (women), and the richest country three (men with hardhats). Concept 2 inequality is calculated across these ten persons, each assigned the average income of their country. In the bottom row, finally, we let each individual come into the parade with his or her true income. Concept 3 inequality is calculated across the ten people in the bottom row. Not all people from the poorest country are poor; in effect, the poorest person is from a middleincome country. Note that the total height of people from each country in the bottom row must be the same as their total height in the middle rowfor obviously the total income of each country is given. The example shows how Concept 2 inequality indeed stands between the other two: the height of people from a given country in the middle row is the same as their height in the top row (Concept 1), while the number of people from each country is the same as their number in the bottom row (Concept 3).
Clearly, we would like to know Concept 3 inequality if we are interested in how world individuals are doing, even if the other two concepts have their uses too. Concept 1 answers whether nations are converging (in terms of their income levels). When we talk of convergence, we are not, necessarily or at all, interested in individuals but in countries. Concept 2 is perhaps the least interesting. It deals neither only with nations nor individuals but falls somewhere in between. Its main advantage is that it approximates well Concept 3 inequality (which, although a concept we would like to know, is the most difficult one to compute). Once Concept 3 is available, however, Concept 2 inequality will be (as the saying goes) history.
Table 1.1 summarizes our discussion of the differences among the concepts.
But how do these concepts perform empirically and how big are the differences among them? Before we turn to this issue, comparing the three concepts at the world level, let's compare them at a level where this is easy. Take the United States and break it down into fifty states. Concept 1 is simply inequality calculated after ranking all states from the poorest to the richest and giving them equal weight. Concept 2 inequality is the same except that weights are now proportional to the states' populations. Concept 3 is our usual U.S. inequality that we obtain from the Bureau of the Census's Current Population Survey. Why is it, then, that neither researchers nor ordinary people ever speak of Concept 2 (or even Concept 1) inequality when they discuss income distribution in the United States? Simply because we have a reasonably good estimate of "true" income distribution (Concept 3) thanks to the Bureau of the Census surveys. The reader has already seen my point: once we have such an estimate of Concept 3 inequality for the world, hardly anyone would bother about Concept 2 inequality. (We might still find it interesting to look at Concept 1 inequality to know whether mean incomes of the countries are converging.) And, of course, the three concepts can move in very different directions.
Table 1.2 shows the three concepts calculated for the United States and the fifty states over the period 195989 (per capita incomes by state are available at decennial intervals only). First, note the huge difference in Gini values between Concept 3 inequality and the other two. For sure, we do not expect to find such a big difference in results for the world as a whole because mean per capita incomes among countries are much more diverse than mean incomes of U.S. states, and thus both Concept 1 and Concept 2 inequality will be closer to Concept 3 inequality. We note, though, that in the United States, Concepts 1 and 2 do not even display the same trend as "true" inequality (Concept 3). While "true" inequality increased between 1969 and 1979, the other two concepts show a decline. Notice, too, that if one were to make conclusions about "true" U.S. inequality based on the first two concepts, one would be led to believe that inequality in 1989 was less than in 1959. The reverse is true: in 1989, inequality was four Gini points (or 11 percent) higher than thirty years ago.
(Continues...)
Table of Contents
Acknowledgments vii
Prologue: The Promise of the Twentieth Century 1
Introduction: A Topic Whose Time Has Come 3
PART I: SETTING THE STAGE
Chapter 1: The Three Concepts of Inequality Defined 7
Chapter 2: Other Differences between the Concepts 12
Chapter 3: International and World Inequality Compared 20
PART II: INEQUALITY AMONG COUNTRIES
Chapter 4: Rising Differences in Per Capita Incomes 31
Chapter 5: Regional Convergence, Divergence, or . . . ''Vergence'' 45
Chapter 6: The Shape of International GDP Per Capita Distribution 51
Chapter 7: Winners and Losers: Increasing Dominance of the West 61
PART III: GLOBAL INEQUALITY
Chapter 8: Concept 2 Inequality: Decreasing in the Past Twenty Years 85
Chapter 9: High Global Inequality: No Trend? 101
Chapter 10: A World without a Middle Class 128
PART IV: CONCLUDING COMMENTS
Chapter 11: The Three Concepts of Inequality in Historical Perspective 139
Chapter 12: Why Does Global Inequality Matter and What to Do about It? 149
Appendixes 17 163
Notes 195
References 213
Index of Authors 223
Index of Subjects 225