Economics 2124A/B Lecture Notes - Lecture 5: Lorenz Curve, Gini Coefficient, Indirect Tax

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15 Dec 2016
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Approximately 18% of the world population lives under . 25/day (almost of ratio in 1990) Slightly more than 1/3 lives on less than per day. Inequality and poverty are present in all countries; developed and developing. Size distributions (quintiles, deciles): shows amount of income received by various classes of families or individudals. (we usually use household income: lorenz curves, gini coefficients and aggregate measures of inequality. Table 5. 1 typical size distribution of personal income in a developing country by income shares quintiles and deciles. If everyone had the same income, the lorenz curve would equal the 45 degree line. Inequality increases as the lorenz curve bends away from the 45 degree line (leading to the area a getting larger). Smaller the number of the gini coefficient, the better. India"s gini coefficient 0. 36 good, a bad number is above 0. 4: most of the world isn"t under 0. 3.

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