From: The effects of living wage laws on low-wage workers and low-income families: What do we know now?
 | 1996-2005 | 2005-2009 |
---|---|---|
Classification: | MSA, PMSA, CMSA | CBSA – Metropolitan Area, Micropolitan Area |
Units: | Counties (except in New England, which uses cities and towns) Based around one or more central cities | Counties (except in New England, which uses cities and towns) |
Population requirements: | MSAs must have 50,000 or more in the central city, or a defined urbanized area of at least 50,000, provided that the component county/counties of the MSA have a total population of at least 100,000 | Metropolitan areas must have 50,000 or more in the core urban area |
Micropolitan areas must have 10,000-50,000 in the core urban area | ||
PMSAs must have at least one county with 100,000 population, 60% urban, 35% residents of county work outside the county, less than 2,500 population of the largest central city of the level A MSA | ||
Under certain conditions, one or more CBSAs may be grouped together to form a larger statistical entity known as a combined statistical area (CSA) | ||
Two or more PMSAs combine to form a CMSA | ||
Inclusion rule: | Counties that include a central city of the MSA, or at least 50 percent of the population of such a city, provided the city is located in a qualified urbanized area; counties in which at least 50 percent of the population lives in the qualified urbanized area(s); outlying counties are also included if certain conditions are met (population density, 40-50% of workers commute to the central city, etc.) | Core urban county, and adjacent counties that have a high degree of social and economic integration (as measured by commuting to work) with the urban core |