A STATISTICAL METHOD 
FOR MEASURING 
“MARGINAL UTILITY’ AND TESTING 
THE JUSTICE OF 
A PROGRESSIVE INCOME TAX 
Irving | Fisher, Ph.D. 
Professor of Politinl Heonomy, Yale University 
Reprinted from 
Foowoumic Essays ContriBurep IN HoNor or JonN Bares CLARK 
Published on Behalf of the American Hconomic Association by 
The Maemillan Company, 1927