A detailed publication that explains how the government decides who is counted as unemployed and how they measure unemployment.

Provides historical unemployment data for state and metropolitan areas of the United States.

"BLS Handbook Of Methods," from the Bureau of Labor Statistics. Presents detailed explanations of how the Bureau of Labor Statistics obtains and prepares the economic data it publishes.

Article by John E. Bregger, from Monthly Labor Review, January/February 1996. Describes the measurement of self-employment and includes a short analysis of trends in self-employment, covering the period from 1948 to 1996.