Tax Foundation, Feb. 27, 2006
State Business Climate Index. This study is constructed of five component indexes comparing all 50 states: Individual income taxes; major business taxes; sales taxes; unemployment insurance taxes; and taxes on wealth or assets such as real and personal property.

The Cato Institute, January, 2006
State Revenue Boom Paves Way for Tax Cuts The nation’s strong economic growth is creating a revenue boom for (other) state and local governments.

The Public Policy Institute of New York State, Dec. 28, 2004
“Just the Facts.” This report includes 31 tables comparing the cost of major business expenses, along with other indicators, in Michigan and the other 49 states.

Pacific Research Institute For Public Policy, 2004
“Economic Freedom Index.” This ranks nearly 150 indicators from five sectors for each state: Fiscal Sector, Regulatory Sector, Judicial Sector, Government-Size Sector, Welfare-Spending Sector.

Cato Institute, March, 2005
Fiscal Policy Report Card on America's Governors: 2004 A "report card" based on 15 objective measures of fiscal performance.

Tax Foundation, October, 2004
State Business Climate Index. This study is constructed of five component indexes comparing all 50 states: Corporate Income Tax; Individual Income Tax; Sales and Gross Receipts Tax; Unemployment Tax; and Fiscal Balance.

Center for Policy and Legal Studies , 1999
Economic Freedom in America's 50 States. This report provides the results of a first effort to build indexes of economic freedom for the 50 U.S. states.