This brief reviews how citizens, nongovernmental organizations (NGOs), government agencies, and others can strengthen collective action. The authors discuss ways of facilitating collective action, of redesigning institutions and incentives and of the need for policy reform. They point out...

"Many countries have recognized the need to revive agricultural advisory or extension services (the terms are used interchangeably here) as a means of using agriculture as an engine of pro-poor growth; reaching marginalized, poor, and female farmers; and addressing new challenges, such as...