University of Wisconsin-Madison Institute for …
University of Wisconsin-Madison
Institute for
Research on Poverty
Discussion Papers
Eugene Smolensky Robert Plotnick INEQUALITY AND POVERTY IN THE UNITED STATES: 1900 TO
i
Institute for Research on Poverty Discussion Paper no. 998-93
Inequality and Poverty in the United States: 1900 to 1990
Eugene Smolensky Graduate School of Public Policy University of California, Berkeley
Robert Plotnick Graduate School of Public Affairs
University of Washington and
Institute for Research on Poverty University of Wisconsin-Madison
March 1993
The authors thank Eirik Evenhouse and Siobhan Reilly for research assistance, and the Institute for Business and Economic Research of the University of California at Berkeley for financial support.
Abstract
Over the period from 1900 to 1990 there was no trend in income inequality. Inequality was high and rising during the first three decades of the century and peaked during the Depression. It fell sharply during World War I1 and remained at the lower level in the 1950s and 1960s. In the 1970s and 1980s it rose rapidly to pre-WWII levels. The rate of poverty exhibited a long-run downward trend from about 80 percent in 1900 to the 12 to 14 percent range in recent years. There was considerable fluctuation around this secular trend. Changes in inequality were largely produced by demographic changes, the growth and decline of various industries, changes in patterns of international trade, and World War 11. Economic growth, demographic change, unemployment, and inflation were the primary drivers of the rate of poverty. Public policy has reduced the marketgenerated level of inequality, but since 1950 has had little effect on the trend in inequality. Prior to 1950, the growth of government, and particularly the introduction of a broadly based income tax during World War 11, coincided with and partly produced the sharp downward shift in inequality of that era. Government had little effect on poverty rates until 1950. Public income transfer programs have reduced poverty rates appreciably in recent decades. Since World War 11, when it has been on a large enough scale to matter, public policy has tended to reinforce market-generated trends in inequality and poverty rather than offset them.
Inequality and Poverty in the United States: 1900 to 1990
"The recent history of Western nations reveals an increasingly widespread adoption of the idea that substantial equality of social and economic conditions among individuals is a good thing. The roots of' egalitarian thought are deep in Western civilization."
Robert Lampman, Ends and Means of Reducing Income Poverty (1971)
When the twentieth century opened, there was an unusually high level of interest in the economic well-being of the working poor. The Bureau of Labor Statistics in Washington, D.C., the Statistics Bureau in Massachusetts, and the Heller Commission in San Francisco were conducting the first quantitative studies of U.S. workers' living standards. Robert Hunter, inspired by Europeans such as Booth, Rowntree, and Engel, was soon to give us our first important sociological study of poverty. The upper end of the income distribution was the object of no less scrutiny, as the Progressives fixed their eye on the monopolies and the new class of rich industrialists and professionals, whom they believed wielded disproportionate political and economic power.
As the century draws to a close, there is renewed attention to these same issues. Almost two decades without economic progress for the working class, accompanied by highly visible accumulations of financial wealth by the top one-half of 1 percent of the income distribution, has turned the routine publication of an income distribution report by a congressional committee into a political event.' Article upon article detailing the recent rise in inequality must make it seem unprecedented to all but the most knowledgeable specialists. In fact, with regard to inequality at least, we are probably replaying the statistical record of a century ago.
While Robert Lampman is undoubtedly correct that "The egalitarian question is different for every generation" (1957, p. 235), inequality in the distribution of income and wealth and special concern for the welfare of persons in the lower tail of those distributions are persistent claimants of attention from citizens, statesmen, and scholars. Since the emergence of capitalism and the
beginnings of economics as a discipline, the distribution of well-being has contended with the sources of economic growth for primacy of attention. Although many lament the consequences for growth that concern with equality may generate, concern will not go away. Equality and fairness are as closely linked in our minds as growth and progress.
In this paper, the "poverty raten (or "incidence of poverty") measures the proportion of the population with incomes below a particular income level fixed in real terms--a poverty line or poverty threshold. "Inequality" refers to the way income is distributed among the whole population.
While poverty and inequality may be highly correlated over a short period, they are distinct concepts. Figure 1 illustrates the distinction. A measure of income inequality characterizes the shape of the depicted distribution. The poverty rate corresponds to the area under the curve to the left of the poverty threshold. If the shape of the distribution were invariant, that is, if inequality did not change, the poverty rate would nevertheless fall as economic growth shifted the distribution rightward over time. This is the story, in gross terms, of the past ninety years: While there has been no clear overall trend in ineauality, or the distribution of economic well-being, the average level of well-being has risen and the povertv rate has declined.
That we do not observe a clear overall trend in inequality should not lead us to conclude that nothing happened during the course of the century to affect inequality. Wars, technological advances, demographic changes, changes in the openness of the economy, and public policy are among the many forces that have altered the shape of the U.S. income distribution. This paper first describes and suggests reasons for the changes in measured income inequality during the past ninety years. It then describes the reduction in poverty during the same period, particularly since World War 11, and analyzes why the decline occurred. The third part discusses the ways in which public policy has shaped and been shaped by the historical record. Part four assesses the robustness of the story told in the first three parts, and the fifth sums up.
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