Alabama

Arizona

California

Florida

Georgia

Hawaii

Illinois

Kansas

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

New Jersey

New Mexico

New York

Ohio

Oklahoma

Pennsylvania

Texas

Virginia

Washington

Wisconsin

Highlights

Texas-STAMP. In 2005, the Texas Public Policy Foundation used Texas-STAMP to examine a proposal calling for a payroll tax combined with higher taxes on sales, cigarettes and property. Texas-STAMP showed a loss of 40,000 jobs, $13 billion in annual investment and $9 billion in personal disposable income. The Wall Street Journal reported the results and the legislature dropped the payroll tax.

Alabama-STAMP. In 2002, the Governor of Alabama sought to increase state taxes by $1.2 billion. The Alabama Policy Institute used Alabama-STAMP in its study, "Tax Changes in Alabama: the Economic Consequences" which detailed the economic effects of the proposal. Voters defeated the proposal by a margin of more than two to one in a referendum vote.

New York City-STAMP. In 2001, and later in an update in 2005, New York City -STAMP identified the effects on the New York City economy of proposed changes in the city income, sales, corporate and property taxes for the Manhattan Institute. The institute used the model to assess the tax policies of candidates for mayor in the November 2001 election and the effectiveness of tax cuts enacted under Mayor Giuliani for creating jobs. Results from the 2005 version, renamed "Gotham-STAMP," received attention in the New York City press.

Washington-STAMP. In 2001, the Washington Policy Center published The Economic Case Against an Income Tax in Washington State to argue against a proposal by the Washington State Tax Structure Committee. Using findings from the Washington-STAMP, WPC described in detail how the imposition of an income tax would cost the state 134,000 jobs and reduce disposable income by $4.3 billion each year.