Title: Income Distribution and Poverty (???????)
1Income Distributionand Poverty(???????)
Chapter 15
2(?)The Utility Possibilities Frontier(??????)
- ????????????,???????????,????????,?????,??A??????,
??B??????????
3(?)The Utility Possibilities Frontier (??????)
- ??????????????,?????????A??,I?J?????????????????
- B????A?????
- B??C??????,????????????????
4(?)The Sources of Household Income(?????????)
- Households derive their incomes from three basic
sources
(????????????????) - from wages or salaries received in exchange for
labor(??) - from propertythat is, capital, land, and so
forth(??) and - from government.(?????)
5Wages and Salaries
- ?2000??,???60????????????
- ?1999??,??????76????????????
?????????????????????,1999 ?????????????????????,1999 ?????????????????????,1999 ?????????????????????,1999 ?????????????????????,1999 ?????????????????????,1999 ?????????????????????,1999 ?????????????????????,1999
??? ??? ??? ???
?????? 10.739475? 1.454.268? 782.108?
8.503.099?
1.??????
N.T374.277 N.T543.442 N.T410.611
N.T342.004 (????,?????????)
(76) (78)
(75) (75)
2.?????
N.T107.635 N.T102.136 N.T118.110
N.T107.612 (??????,?????????????)
3.??????
N.T37.569 N.T74.197 N.T51.773
N.T29.998 (?????,????,???????)
4.????
N.T26.994 N.T27.040 N.T35.457
N.T23.882 (???????????)
???????(123-4) N.T492.487
N.T692.735 N.T545.036
N.T453.406
?????????????(2001)88?????????,http//www.dgbas.g
ov.tw/
6Wages and Salaries
- ????????????
- ????????????
- ?????????
7??1???????
- ??????????????????(perfectly competition
market),??????????,???????(factors of
production)??????????????(marginal revenue
product),?????????????????(economic profit 0)? - ????????,???????????(K)????(L),?m???????,w????
???(???????),Q????,p???????,?economic profit
0? - TR-TC0 gt pQ-mK-wL0 gt
pQmKwL
8- Taking partial derivatives, we get
- ??????????????????,???????????????????????????
????????????????????
9??2??the rewards of a skill ??
- Human capital(????)
- ??????????????????????,????????????????
- ???Mens professional basketball is extremely
popular,thus,the top NBA players make millions of
dollars per year,?Womens professional basketball
is less popular,thus,these womens skill go
comparatively unrewarded,???tennis?,?Mens and
womens ?????????,??????????????? - Rare skills can make enormous salaries
- ??Luciano Pavarotti ?????????voice,??????????
??????Tapes and CDs???
10??3Differences in working conditions
- ?????????(compensating differentials)???????,?
?????????,???,???????,??????????? - ???publishing and television ?????,tend to be
low-paying,??????????,??????????????,?????????????
???????(??????),??????????????,????????????,??????
Human capital,???????????,??????????????,?????????
??
11- ??4?multiple Household income?????????????????????
?????,???????????????????,??????,?????????,???????
- ??5?minimum wage(????)?????????????,??????????????
???,?????????????????????????minimum
wage?????????????????,???????,???????????,????????
,???????,?????????????????
12??6?Unemployment(??)People earn wages only when
they have jobs.
unemployment in U.S.A
unemployment in R.O.C
Rate
Rate
5.3
11
2.7
2.6
9
1.8
1.5
1.5
3.9
1975
1982
2000
1992
2001
2000
1994
1996
1998
year
year
?????????????,2002
13Income from Property(???????)
- Property income is income derived from ownership
of real property and financial holdings. It
takes the form of profits, interest, dividends,
and rents. (???????????????,??????????,
???????,???????????????,???????,?????,?????,?????
?????????) - The amount of property income that a household
earns depends on - how much property it owns, and
- what kinds of assets it owns.
14Income from Government(?????????)
- Transfer payments are payments by the government
to people who do not supply goods or services in
exchange. (?????????????????????????????????????
?????????) - Transfer programs are part of the governments
attempts to offset some of the problems of
inequality and poverty.(??????????,???????????????
???????)
15Income from the government
- ???2000???,??????16????????????
- ?????1999???,??20????,???????????????16.7???20
????,???????????????1.9? - Not all transfer income goes to the poor
- ?U.S.A,????????????????Social Security??
(??????)??R.O.C,???????????????
(?????????????????????????????????1996?????????,??
???????)
16The Distribution of Income(?????)
- Economic income is the amount of money a
household can spend during a given period without
increasing or decreasing its net assets.
(?????????????????????,?????????,???????) - Wages, salaries, dividends, interest income,
transfer payments, rents, and so forth are
sources of economic income.(????????????????,?????
???????,??????,??????????)
17Economic Income Inequality in the United States
(??????????????)
Distribution of Total Income and Components in the United States, 1997 (Percentages)(????????????????) Distribution of Total Income and Components in the United States, 1997 (Percentages)(????????????????) Distribution of Total Income and Components in the United States, 1997 (Percentages)(????????????????) Distribution of Total Income and Components in the United States, 1997 (Percentages)(????????????????) Distribution of Total Income and Components in the United States, 1997 (Percentages)(????????????????) Distribution of Total Income and Components in the United States, 1997 (Percentages)(????????????????) Distribution of Total Income and Components in the United States, 1997 (Percentages)(????????????????) Distribution of Total Income and Components in the United States, 1997 (Percentages)(????????????????) Distribution of Total Income and Components in the United States, 1997 (Percentages)(????????????????)
HOUSEHOLDS TOTAL INCOME TOTAL INCOME WAGES AND SALARIES WAGES AND SALARIES PROPERTY INCOME PROPERTY INCOME TRANSFER INCOME TRANSFER INCOME
Bottom fifth 6.0 5.7 1.0 27.6
Second fifth 9.1 11.9 4.0 26.1
Third fifth 14.7 19.9 8.4 18.7
Fourth fifth 23.6 27.3 16.4 13.9
Top fifth 46.6 35.2 70.2 13.7
Top 1 percent 10.0 3.2 29.7 1.5
Source Brookings Merge File and authors estimates. Source Brookings Merge File and authors estimates. Source Brookings Merge File and authors estimates. Source Brookings Merge File and authors estimates. Source Brookings Merge File and authors estimates. Source Brookings Merge File and authors estimates. Source Brookings Merge File and authors estimates. Source Brookings Merge File and authors estimates. Source Brookings Merge File and authors estimates.
18?????????(disposable personal income)???,1999
????(?????)
????????()
????????(Disposable personal income)?????????????
?????(?????????)? ???????????????????(2001),????
?????????(???)?
1 (?????)
7.1
2
12.9
3
17.5
4
23.2
5
39.2
(?????)
19Money Income(????)
- Money income is a measure of the income used by
the Census Bureau. Because it excludes noncash
transfer payments and capital gains income, it is
less inclusive than economic income.(??????????
???????????,???????????????????,????????????????Ec
onomic income,Money income???????????)
20Changes in the Distribution of Income(???????????
)
Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages) Distribution of Money Income of U.S. Families by Quintiles, 1947 1997 (Percentages)
1947 1947 1960 1960 1972 1972 1980 1980 1984 1984 1994 1994 1997 1997
Bottom fifth 5.0 4.8 5.4 5.2 4.7 4.2 4.2
Second fifth 11.8 12.2 11.9 11.5 11.0 10.0 9.9
Third fifth 17.0 17.8 17.5 17.5 17.0 15.7 15.7
Fourth fifth 23.1 24.0 23.9 24.3 24.4 23.3 23.0
Top fifth 43.0 41.3 41.4 41.5 42.9 46.9 47.2
Top 5 percent 17.2 15.9 15.9 15.3 16.0 20.1 20.7
Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division. Source Statistical Abstract of the United States, various editions Department of Commerce, HHES Division.
21The Lorenz Curve(?????)
- The Lorenz curve is a widely used graph of the
distribution of income, with cumulative
percentage of families plotted along the
horizontal axis and cumulative percentage of
income plotted along the vertical axis.
22The Lorenz Curve for U.S.A,1997
(?????)
Figure 15.2
??????1997???????
- If income is equally distributed, there is no
shaded area.
- More unequal distributions of income produce
Lorenz Curves that are farther from the 45-degree
line.
23The Gini Coefficient(????)
The shaded area
- ?????,????????????????,???????1?,?????????????,???
????????,????????0?,?????????????,??????????
B
24???????????????????????????????????????????????
Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages) Distribution of Money Income of Households, 1997 (Percentages)
ALLHOUSEHOLDS ALLHOUSEHOLDS ALLHOUSEHOLDS AFRICAN-AMERICANHOUSEHOLDS AFRICAN-AMERICANHOUSEHOLDS WHITEHOUSEHOLDS WHITEHOUSEHOLDS HISPANICHOUSEHOLDS HISPANICHOUSEHOLDS ONE-PERSONHOUSEHOLDS ONE-PERSONHOUSEHOLDS
0-10,000 11.0 21.4 9.5 16.8 25.4
10-15,000 8.1 10.5 7.8 10.7 15.8
15-25,000 14.9 17.9 14.6 19.7 20.7
25-35,000 13.3 14.2 13.2 15.0 14.0
35-50,000 16.3 14.9 16.5 16.6 11.6
50-75,000 18.1 13.1 18.8 12.2 7.7
75,000 18.4 7.9 19.7 9.1 4.7
Total 100.0 100.0 100.0 100.0 100.0
Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744. Note Totals may not add to 100 due to rounding.Source Statistical Abstract of the United States, 1999, Tables 742 and 744.
25Poverty(??)
- In simplest terms,poverty is the condition of
people who have very low income. - The official poverty line(???????)????????????????
????????????????????? - U.S ?official poverty line
- the cost of minimum food budget 3
- ???1960????,?????????poor families
???1/3???????????,????poverty line ???????????3?
26Poverty in the United StatesSince 1960
Table 15.4
Percentage of Persons in Poverty by Demographic Group, 1964 - 1997 Percentage of Persons in Poverty by Demographic Group, 1964 - 1997 Percentage of Persons in Poverty by Demographic Group, 1964 - 1997 Percentage of Persons in Poverty by Demographic Group, 1964 - 1997 Percentage of Persons in Poverty by Demographic Group, 1964 - 1997 Percentage of Persons in Poverty by Demographic Group, 1964 - 1997 Percentage of Persons in Poverty by Demographic Group, 1964 - 1997 Percentage of Persons in Poverty by Demographic Group, 1964 - 1997
OFFICIALMEASURE1964 OFFICIALMEASURE1964 OFFICIALMEASURE1997 OFFICIALMEASURE1997 ADJUSTED FORIN-KIND TRANSFERSAT MARKET VALUE, 1997a ADJUSTED FORIN-KIND TRANSFERSAT MARKET VALUE, 1997a ADJUSTED FORIN-KIND TRANSFERSAT MARKET VALUE, 1997a
All 19.0 13.3 10.0 10.0
White 14.9 11.0 8.4 8.4
African-American 49.6 26.5 19.3 19.3
Hispanic NA 27.1 19.6 19.6
Female householder no husband present 45.9 35.1 NA
Elderly (65) 28.5 10.5 NA
Children under 18 20.7 19.9 NA
aIncludes food, housing, and medical benefits.Source Statistical Abstract of the United States, 1999, Tables 760, 763, 766, and 770. aIncludes food, housing, and medical benefits.Source Statistical Abstract of the United States, 1999, Tables 760, 763, 766, and 770. aIncludes food, housing, and medical benefits.Source Statistical Abstract of the United States, 1999, Tables 760, 763, 766, and 770. aIncludes food, housing, and medical benefits.Source Statistical Abstract of the United States, 1999, Tables 760, 763, 766, and 770. aIncludes food, housing, and medical benefits.Source Statistical Abstract of the United States, 1999, Tables 760, 763, 766, and 770. aIncludes food, housing, and medical benefits.Source Statistical Abstract of the United States, 1999, Tables 760, 763, 766, and 770. aIncludes food, housing, and medical benefits.Source Statistical Abstract of the United States, 1999, Tables 760, 763, 766, and 770. aIncludes food, housing, and medical benefits.Source Statistical Abstract of the United States, 1999, Tables 760, 763, 766, and 770.
?in-kind transfer(????????)?????,
???????????????,???????
27The Distribution of Wealth(?????)
- The distribution of wealth is much more unequal
than the distribution of income. Wealth is
passed from generation to generation and
accumulates. - Some argue that unequal distribution of wealth is
a natural consequence of risk taking (????) in a
market economy.
28The Distribution of Wealth (?????)
Percentage of Different Assets Owned by Households, 1998 Survey of Consumer Finances(??????????????) Percentage of Different Assets Owned by Households, 1998 Survey of Consumer Finances(??????????????) Percentage of Different Assets Owned by Households, 1998 Survey of Consumer Finances(??????????????) Percentage of Different Assets Owned by Households, 1998 Survey of Consumer Finances(??????????????) Percentage of Different Assets Owned by Households, 1998 Survey of Consumer Finances(??????????????) Percentage of Different Assets Owned by Households, 1998 Survey of Consumer Finances(??????????????) Percentage of Different Assets Owned by Households, 1998 Survey of Consumer Finances(??????????????) Percentage of Different Assets Owned by Households, 1998 Survey of Consumer Finances(??????????????)
PERCENTAGE OF OWNERS COMMON STOCK EXCLUDING PENSIONS COMMON STOCK EXCLUDING PENSIONS ALL COMMON STOCK ALL COMMON STOCK NONEQUITY FINANCIAL ASSETS HOUSING EQUITY NET WORTH
Top .5 percent 41.4 37.0 24.2 10.2 25.6
Top 1 percent 53.2 47.7 32.0 14.8 34.0
Top 10 percent 91.2 86.2 72.2 50.7 68.9
Bottom 80 percent 1.7 4.1 14.0 29.3 18.5
Source James Poterba, Stock Market Wealth and Consumption, Journal of Economic Perspectives, 14(2), 99 118 , Spring 2000. Source James Poterba, Stock Market Wealth and Consumption, Journal of Economic Perspectives, 14(2), 99 118 , Spring 2000. Source James Poterba, Stock Market Wealth and Consumption, Journal of Economic Perspectives, 14(2), 99 118 , Spring 2000. Source James Poterba, Stock Market Wealth and Consumption, Journal of Economic Perspectives, 14(2), 99 118 , Spring 2000. Source James Poterba, Stock Market Wealth and Consumption, Journal of Economic Perspectives, 14(2), 99 118 , Spring 2000. Source James Poterba, Stock Market Wealth and Consumption, Journal of Economic Perspectives, 14(2), 99 118 , Spring 2000. Source James Poterba, Stock Market Wealth and Consumption, Journal of Economic Perspectives, 14(2), 99 118 , Spring 2000. Source James Poterba, Stock Market Wealth and Consumption, Journal of Economic Perspectives, 14(2), 99 118 , Spring 2000.
29The Redistribution Debate(?????????)
- Philosophical arguments against
redistribution(???????????) - The market, when left to operate on its own, is
fair. One is entitled to the fruits of ones
efforts.(????????,???????????,???????????????????
?,???????) - Taxation of income for redistribution purposes is
against freedom of contract and the protection
of property rights.(???????????,?????????????,????
?????????????????,??????????????????????????)
30The Redistribution Debate(?????????)
- Practical arguments against redistribution
(?????????????)
- Taxation and transfer programs interfere with the
incentives to work, save, and invest(??). - Bureaucratic waste and inefficiency is inevitable
in the administration of social
programs(???????,??????,????????????????). For
example, Professors Edgar K. Browning and William
R. John (1984) estimated the cost of
redistribution. They concluded that about 71 of
income is lost in redistributing it.
31The Redistribution Debate
- Arguments in favor of redistribution
(???????????????)
1.A wealthy country has the moral obligation
to provide all its members with the necessities
of life. The Constitution does carry a guarantee
of the right to life. ???????,????????,?????
?????????????????????????
32Arguments in favor of redistribution
- 2.Utilitarian justice is the idea that a dollar
in the hand of a rich person is worth less than a
dollar in the hand of a poor person. If the
marginal utility of income declines with income,
transferring income from the rich to the poor
will increase total utility. - ( ??????????????,?????????????????,??????1,????
?????????????1????????????,?????1?????,?????????
??(???)?)
33??Diminishing Marginal Utility of Income
Utility
U poor
U
U rich
0
2
3
1
Income
Q rich
Q poor
34Arguments in favor of redistribution
- 3. Rawlsian justice is a theory of distributional
justice that concludes that the social contract
emerging from the original position would call
for an income distribution that would maximize
the well-being of the worst-off member of
society.(Rawls???John Rawls(1997)??,?????????,???
??????????,?????????????(social
contract)??????????????????original
position?state of nature,????????????,?????????
????????Rawls??,?????,???????????????,????????????
??,??????risk averse(?????),???????????????,????
??????????,????????????????,???????????,??,???????
????????,?????????????,???????????)
35The Works of Karl Marx(????????)
- Marx did not write very much about socialism or
communism. - He wrote a critique of capitalism, but was not
very clear about what would replace
it.(??????????????,??????????????????????) - In one essay he wrote, from each according to
his ability, to each according to his
needs.(???????,???????????????????,??????)
36The Works of Karl Marx
- The labor theory of value, stated most simply, is
the theory that the value of a commodity depends
only on the amount of labor required to produce
it.(???????????-??.??(1723-1970)???.???(1772-1823
)???,?????(1818-1883)??????????,?????,????????????
???????????????,????) - The owners of capital are able to extract
surplus value out of labor.(????????????????????
??????????,???????????????????????,?surplus
value?) - ??,?????????????????????????????????
37Effective Rates of Federal, State, and Local Taxes, 2000 (Taxes as a Percentage of Total Income) Effective Rates of Federal, State, and Local Taxes, 2000 (Taxes as a Percentage of Total Income) Effective Rates of Federal, State, and Local Taxes, 2000 (Taxes as a Percentage of Total Income) Effective Rates of Federal, State, and Local Taxes, 2000 (Taxes as a Percentage of Total Income) Effective Rates of Federal, State, and Local Taxes, 2000 (Taxes as a Percentage of Total Income)
Bottom 20 34.0
Second 20 31.2
Third 20 32.3
Fourth 20 32.6
Top 20 33.9
Top 10 34.5
Top 5 34.9
Top 1 37.0
??Effective tax rate(??????????)??????????????,??? ????????????? Source Authors estimate. ??Effective tax rate(??????????)??????????????,??? ????????????? Source Authors estimate.
38Expenditure Programs to eliminate poverty
- (1) The Social Security system( ??????)
- is a federal system of social insurance
programs. It includes three separate programs
that are financed through separate trust funds - the Old Age and Survivors Insurance (OASI)
program (???????62?????????,???????????1999??,????
???12.4) - the Disability Insurance (DI) program
(??????????????????) - the Health Insurance (HI, or Medicare) program
(?65?????????????,?1998??,???????2.9).
39Expenditure Programs to eliminate poverty
- (2) Public assistance or welfare
- consists of government transfer programs
that provide cash benefits to - families with dependent children whose incomes
and assets fall below a very low level, and - the very poor, regardless of whether or not they
have children.
40Expenditure Programs to eliminate poverty
- (3) The Supplemental Security Income (SSI)
program (???????????) - is designed to take care of the elderly who
end up very poor.
41Expenditure Programs to eliminate poverty
- (4) Unemployment compensation (?????)
- ???????????????,??????
- 1996???????????
Japan USA Germany France UK ROC
Unemp. Rate 3.4 5.4 11.5 12.3 7.6 2.9
Payment/Previous wage 60-80 37 60 57.4-75 80 60
Period of payment 90-300 days About 5-6 months 15-52 weeks --- --- 6 months
42Expenditure Programs to eliminate poverty
- (5) Medicaid and Medicare are in-kind government
transfer programs that provide health and
hospitalization benefits - Medicare to the aged and their survivors and to
certain of the disabled, regardless of income,
and Medicaid to people with low incomes.
43Expenditure Programs to eliminate poverty
- (6) Food stamps are vouchers that have a face
value greater than their cost and that can be
used to purchase food at grocery stores. - (7) Housing programs are designed to improve the
quality of life for low-income people. - (8)The Earned Income Tax Credit is an important
program that allows lower income families with
children a credit equal to a percentage of all
wage and salary income against their income taxes.