An econometric approach using international and national yield trial data is employed to estimate a spillover matrix for wheat varietal technology. The global spillover matrix is estimated based on international yield trial data from 1979-80 to 1987-88, that include 195 international trial...

Estimates of aggregate disease costs can be used for assigning research resources or to evaluate control measures. Most diseases cause production losses, but others affect quality and marketability. Seed-borne diseases also cause problems for the seed production and distribution industry. The...

Recent strong commodity prices have led to rising demand for farmland and this is projected to continue for the medium term because of increasing populations and incomes and growing use of biofuels. Global analysis indicates that about 450 Mha of suitable land may be available to bring into...

This paper provides quantitative evidence on the impact of the Training and Visit (T & V) extension system in the irrigated Punjab of Pakistan. Three models are analyzed using limited dependent variable regressions: the impact of T & V on the number of extension contacts with farmers; the effect...

We used a disaggregate approach to examine investment efficiency of wheat breeding research in India. India's total research effort comprizes 20 research programs spread across 50 experiment stations. A technology spillover matrix was constructed for both potential and actual spillovers....

Expenditures on agricultural research in the public sector, including the International Agricultural Research Centers (IARCs) have stagnated and in some cases, declined sharply in recent years. This has focused attention on issues of efficiency of agricultural research systems, especially the...

It is now widely accepted that technological change is a necessary although by no means sufficient condition for agricultural development. It is clear that despite the widespread diffusion of new wheat and rice varieties, many new technologies are not being widely used by farmers because they do...