ECO 2117 Lecture Notes - Lecture 5: Gini Coefficient, Lorenz Curve, Transfer Principle

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Gini coefficients and aggregate measures of inequality. Anonymity: measure should not depend on who has higher income; e. g. whether we believe the rich or poor to be good or bad people. Scale independence: inequality measures should not depend on the size of the economy want a measure of income dispersion. Population independence principle: an inequality measure should not be based on the number of income recipients. Transfer principle: with all other incomes constant, if we transfer some income from a richer to a poorer person (the poorer person still poorer than the richer person), the resulting new income distribution is more equal. Gini coefficient satisfies all four properties; so does the coefficient of variation (cv) and some. Personal distribution of income (size) : the distribution of income according to size class of persons for example, the share of total income accruing to the poorest specific percentage or the richest specific percentage of a population.

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