First developed in 1994, STAMP identified the negative economic consequences of a proposed graduated income tax in Massachusetts. Massachusetts voters defeated the proposal in November of that year. Since then STAMP has been applied in a number of states considering tax changes
States where STAMP has been applied
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
Read more:
The Economics of STAMP
How STAMP works
The CGE team
Recent work
