Chapter 5 Flashcards
(46 cards)
most commonly used by economists; deals with individual persons or households and the total income they receive
Size Distributions
20% proportion, five groups
Quintile
10% proportion, ten groups
Decile
disproportionate distribution of total national income among households
Income Inequality
a graph depicting the variance of the size distribution of income from perfect equality
Lorenz Curve
an aggregate measure of income inequality ranging from 0 to 1 (from perfect equality to perfect inequality); measured graphically by dividing the area between the perfect equality line and the Lorenz curve by the total area; satisfy the four desirable properties
Gini coefficient
Four Desirable Properties for Inequality Measures
Anonymity
Scale Independence
Population Independence
Transfer Principle
measure should not depend on who has higher income
Anonymity
proportion of a country’s population living below the poverty line
H – number of poor
N – total number of people
Headcount Index
all other incomes constant, if transfer of income from a richer to a person, resulting new income distribution is more equal
Transfer Principle
measure should not depend on the size of the economy, but the income dispersion
Scale Independence
measure should not be based on the number of income recipients
Population Independence
the situation of being barely able to meet the subsistence essentials of food, clothing, and shelter
Absolute Poverty
the sum of the difference between the poverty line and actual income levels of all people living below that line
Yp – absolute poverty line
Yi – the income of the ith poor person
Total Poverty Gap
TGP/N
Average Poverty Gap (APG)
APG/ Yp
Normalized Poverty Gap (NGP)
TPG/H
Average Income Shortfall (AIS)
a good poverty measure will be based only on the incomes (well-being) of the poor; an increase or decrease in the income of those above the poverty line should not affect how we measure poverty
Focus Principle
AIS/ Yp
Normalized Income Shortfall (NIS)
used in empirical work on income poverty because of its sensitivity to the depts and severity of poverty
P2
all of the benefits of growth are divided among traditional-sector workers, with little or no growth occurring in the modern sector; more equal relative distribution of income, curve move upwards
Traditional-sector Enrichment
the P class of poverty measure , which include as special cases the headcount ratio and the normalized income shortfall, but in other cases, notably the P2 measure, satisfy all four axioms for desirable poverty measures, including distributional sensitivity
Foster-Greer-Thorbecke (FGT) Index
growth is limited to a fixed number of people in the modern sector, with both the numbers of workers and their wages held constant in the traditional sector; less equal relative distribution of income, curve move downwards
Modern-sector Enrichment
two-sector economy develops by enlarging the size of its modern sector while maintaining constant wages in both sectors; may improve or worsen, curve crosses
Modern-sector Enlargement