This paper present a model of the Green Revolution in India, in which the development and diffusion of HYVs, the expansion of irrigation and the expansion of multiple-cropping are treated as endogenous responses to more basic investments in agricultural technology and infrastructure, as well as...

This paper reviews econommic studies of rice research programs and attempts to identify the contributions of rice varietal improvement to changes in rice productivity. I also report some new work specifically addressed to the contributions of genetic resources to the production of rice varieties.

Biodiversity has become economically important. Most general biologists focus on diversity across species, and within-species classification is given little attention by taxonomists. But to agriculturalists the latter is vital, because plant and animal breeding depends on within-species...

This paper document research and development spillovers between nations and between industries, discussing some theoretical and measurement issues. A new technique makes patent data more practical for economic uses, allowing analysis of the industries of manufacture and sectors of use for...

This paper provides a basis for both the base case projections and an important policy simulation dealing with the diffusion of biotechlogy to developing countries

This paper presents (1) a conceptual framework for structural change when farms may be multiproduct or specialized and (2) an econometrics of causes of structural and total factor productivity (TFP) change for U.S. agriculture. Farm size, farm specialization, and part-time farming are the...

The paper examines effects of agricultural extension on crop yields in Kenya controlling for other determinants of yields, notably the schooling of farmers and agro-ecological characteristics of arable land. The data we use were collected by the Government of Kenya in 1982 and 1990, but the...

This paper examines whether sharecroppers and fixed-rent tenants in the rice farms of South Asia are distinguished by their farming skills. The idea that fixed-rent contracts are typically given to relatively skilled tenants dates back to the agricultural (tenancy) ladder hypothesis of Spillman...