The Public Use Microdata Sample L (PUMS-L) data file is a sample of respondents from the 1990 Census of Population. The file contains information household and personal characteristics for individuals. The PUMS-L data file also identifies labor market areas that can be used for statistical and planning purpose. The 394 labor market areas (LMAs) identified in PUMS-L are based on commuting-to-work data from the 1990 Census and encompass all county and county-equivalents in the 50 States and the District of Columbia. A local economy and its labor market are not bounded by the nearest county line, but by interrelationships between buyers and sellers of labor. PUMS-L contains a unique labor market area (LMA) geography delineated by Charles M. Tolbert (LSU) and Molly Sizer (University of Arkansas). PUMS-L is a minimum 0.25 percent sample. Like all PUMS geographic units, the labor market areas must have a population of at least 100,000 persons. To avoid having as few as 250 people in smaller LMAs, the Bureau made an effort to supply at least 2000 people per LMA. Inclusion of these additional people resulted in a 0.45 percent sample. Sampling weights are included in the file that compensate for the oversampling of smaller LMAs. The resulting file contains information on 519,237 households and 1,139,142 people. Weighted totals are households - 101,916,857; people - 248,709,867. This data was prepared by the Louisiana Population Data Center.