Decent Work in America: The State-by-State Work Environment Index, 2005
The study rates working environments in all 50 states and Washington, D.C., in terms of average pay, employment opportunities, employee benefits, percentage of low-income workers, fair treatment between genders and ability for employees to unionize. A major finding of the study is a consistent correspondence between the quality of a states environment for workers and its economic health.
Link
http://www.umass.edu/peri/pdfs/DWA.pdf