According to REPEC, IFPRI is #1 among the top 25% of all agricultural economics departments globally based on citations. You can find more info on the… REPEC site

This page shows one of the many rankings computed with RePEc data. They are based on data about authors who have registered with the RePEc Author Service, institutions listed on EDIRC, bibliographic data collected by RePEc, citation analysis performed by CitEc and popularity data compiled by LogEc. To find more rankings, historical data and detailed methodology, click here. Or see the ranking FAQ. These rankings take only into account institutions registered in EDIRC and authors registered with the RePEc Author Service and the institutions they claimed to be affiliated with. For Agricultural Economics Departments, these are 222 institutions. Institutions need satisfy the following criteria to be included: Departments primarily or significantly involved in agricultural economics and listed as such on EDIRC.