"It is one of the happy incidents of the federal system that a single courageous State may, if its citizens choose, serve as a laboratory; and try novel social and economic experiments without risk to the rest of the country." Louis D. Brandeis, Supreme Court Justice from 1916 to 1939.

*Rank is based on the ALEC Competitive Environment Index which uses 15 factors including various tax rates, minimum wage, legal environment, etc.
Hoven's Index for December 8, 2009
Net domestic migration (among US states), 1998-2007:
New York: -1,936,127.
California: -1,438,480.
Illinois: -735,768.
Texas: +736,903.
Arizona: +817,169.
Florida: +1,579,704.