Researchers worked with the Secretariat of Public Security of Mexico City to evaluate the impact of a procedural justice training for police officers. The training had significant positive impacts on how individual police officers perceived and practiced the principles of procedural justice. They also help reveal the specific mechanisms through which the training achieved its effects, thus providing important insights into likely avenues for effective police reform. Since 2019, over 1,500 police officers in 28 cities in Mexico have received procedural justice training.

Deforestation contributes up to 20 percent of global greenhouse gas emissions, primarily driven by agricultural expansion. One promising program is payments for ecosystem services (PES), which offers forest-owning households cash payments for conserving their forested land. Researchers partnered with Conafor, Natura Mexicana, and IPA Mexico to conduct a randomized evaluation to measure the impact and cost-effectiveness of a new contract that requires PES participants to fully enroll their forested land to receive payments. Full enrollment reduced deforestation by 39 percent, increasing PES cost-effectiveness by 4.6 times, showing promise for forest conservation and local livelihoods.