The Unions of the States

Source: John Schmitt, Center for Economic and Policy Research, February 2010

From the summary:
This report reviews unionization rates, the size and composition of the unionized workforce, and the wage and benefit advantage for union workers in each of the fifty states and the District of Columbia, using the most recent data available and focusing on the period 2003-2009. Pooling data from the monthly Current Population Survey (CPS) over that period yields a sample size large enough to look at the experience of even the smallest states.