Long-Run Structural and Productivity Change in U.S. Agriculture: Effects of Prices and Policies by Wallace E. Huffman and Robert E. Evenson The paper presents (1) a conceptual framework for structural change when farms may be multiproduct or specialized and (2) an econometrics examination of...

This paper examines the impact of public and private agricultural research andextension on agricultural total factor productivity at the state level. We test the hypothesis thatthe composition of agricultural experiment station funding—share of funding from impact offederal competitive grants...