1Paragraph provided by the Bureau of Labor
Statistics' "Union Members Summary 2001."
2RTW and non-RTW summary statistics are weighted by the number of states in each category (typically 29 and 21 for non-RTW and RTW, respectively).
31999 was the last year available as of this writing.
4Lacking cost-of-living data by state, Bennett used Consumer Price Index data from a large number of metropolitan areas to compare RTW versus non-RTW states.
5The Census Bureau's decennial survey data on family income starts in 1969 but the most recent survey (i.e. - 1999) is currently unavailable. The series from the household survey (used in the study), conversely, has data for 2000 but dates back only to 1977. The annual series from the Current Population Survey is not interchangeable because the series uses a different scale than the decennial survey.
6The poverty gap between RTW and non-RTW states was even greater in earlier periods. The U.S. Census Bureau's 1969 decennial survey shows Gini coefficients of .372 and .348 for RTW states and non-RTW, respectively.
7But in the decennial survey on family income, Michigan has the distinction of having the greatest increase in income inequality among all 50 states from 1969 through 1989, with the Gini coefficient rising from .329 to .395.