. Also, many states and the federal government are currently promoting self-employment as a way to leave the welfare and unemployment insurance rolls. For descriptions of these programs see Guy, Doolittle, and Fink (1991) and Raheim (1997) for the AFDC program, and U.S. Department of Labor (1992) and Benus et al. (1995) for the UI program.
IntroductionThe decline in self-employment during this century is one of the major historical trends in the U.S. labor market. The fraction of white male workers who were self-employed fell from one in six in 1910 to one in ten in 1970. It is also striking that this trend stopped and reversed itself between 1970 and 1990. The self-employment rate rose from 10.0 percent in 1970 to 11.4 percent in 1990. Given the magnitude of these changes in self-employment, surprisingly very little research has documented the changes and identified their causes. Trends in black selfemployment have been studied even less, despite much recent interest in the lack of black-owned businesses and frequent conjectures about historical levels of self-employment and their causes.We use Census microdata covering most of the twentieth century to document the trends in selfemployment among both white and black men and to explore their potential causes.An examination of long-term trends in self-employment is important for several reasons.First, it has been argued that small businesses create a disproportionate share of new jobs in the economy, are an important source of innovation, and have an important effect on political decisions in the United States.1 Second, many academicians and policy makers view selfemployment as a route out of poverty and as an alternative to unemployment or potential discrimination in the labor market. 2 Third, the institutional environment in which the selfemployed work differs in important ways from that of wage/salary workers. The self-employed are not subject to the usual labor contracts and their consequent incentives, and they either do not receive, or purchase for themselves, fringe benefits provided by employers, such as health 3 See Wolpin (1977), Lazear andMoore (1984), andRettenmaier (1996). 4 See Phillips (1962) for 1929-60, Bregger (1963) for 1948-62 and updates by Ray (1975), Fain (1980 and Becker (1984), ) for 1948-82, and Aronson (1991) for 1955 The clearest statement comes from Phillips (1962, p. 1) who reports that "...the proportion of self-employed persons in the American labor force has been declining for many decades. This trend will no doubt persist in the future."6 See Bates (1987, 1989), Borjas and Bronars (1989), Meyer (1990), Fairlie (1996Fairlie ( , 1999, and Fairlie and Meyer (1996). 2 insurance and pensions. Past research has argued that the self-employed have a different return to education, will have a different age-earnings profile, and have more variability in hours worked than wage/salary workers.3 Finally, the self-employed are often singled out in the formation of public policy. They are treated differently in various aspects of the tax cod...