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How to compare apples and oragnes: Poverty measurement based on different definitions of consumption [статья]
Опубликовано на портале: 12-12-2002Jean Olson Lanjouw, Peter Lanjouw Review of Income and Wealth. 2001. Vol. 47. No. 2.
Poverty rates calculated on the basis of household consumption expenditures are routinely compared across countries and time. The surveys which underlie these comparisons typically differ in the types of food and non-food expenditures included, often in ways which are easily overlooked by analysts. With several examples we demonstrate that these commonly occurring variations in expenditures definitions can give rise to marked differences in poverty rates where there are no real differences in well-being. We show that one approach to calculating poverty lines, used with headcount measurement of poverty, can allow comparisons based on data with different definitions of consumption. In addition to allowing comparative poverty analysis using existing survey data, the results suggest that poverty monitoring could be done effectively at lower cost by alternating detailed expenditures surveys with far more abbreviated surveys.
Опубликовано на портале: 12-12-2002Branko Milanovic, Shlomo Yizhaki Review of Income and Wealth. 2002. Vol. 48. No. 2.
Using the national income/expenditure distribution data from 111 countries, we decompose total inequality between the individuals in the world, by continents and regions. We use Yitzhakis Gini decomposition which allows for an exact breakdown of the Gini. We find t hat Asia is the most heterogeneous continents; between-country inequality is much more important than inequality in incomes within countries. At the other extreme is Latin America where differences between the countries are small, but inequalities within the countries are large. Western Europe/North America is fairly homogeneous both in terms of countries mean incomes and income differences between individuals. If we divided the world population into three groups: The rich (those with incomes greater than Italys mean income), the poor (those with income less than Western countries poverty lie), and the middle class, we find that there are only 11 percent of people who are world middle class; 78 percent are poor, and 11 percent are rich.