National and International Agricultural Research and Rural Poverty
The study attempts to measure the total benefits from rice varietal improvement research in China and India using variety adoption and performance data over the last two decades. The results indicate that rice varietal improvement research has contributed tremendously to increase in rice production, accounting for 14-23 percent of total production value over the last two decades in both countries.
Link
http://www.ifpri.org/divs/eptd/dp/papers/eptdp109.pdf