J-PAL and its affiliated professors work with governments, NGOs, development organizations, and donors to scale-up programs that are found to be highly effective. To date, 164.6 million people have been reached by programs that were found to be successful by J-PAL affiliates and then scaled-up in different parts of the world.

Research by J-PAL affiliates has also contributed to several important policy debates, for instance, by providing evidence that charging even very small prices for preventative health products significantly reduces use.