In Peru, researchers evaluated the impact of a tailored inquiry- and problem-based learning approach on preschoolers’ performance in math. The program improved overall mathematics outcomes, which persisted for some content areas even one year after the program ended.

Researchers examined the effects of free savings account access on savings account use, indebtedness, consumption, and well-being. Easy access to savings accounts reduced participants’ reliance on borrowing, helped them manage fluctuations in income, and increased their self-reported well-being.

The Value Added Tax (VAT) system, which generates a paper trail on transactions between firms, facilitated tax enforcement by spreading the impact of enforcement measures up the production chain in a study with over 400,000 firms in Chile.

Researchers studied the impact of the gender of communicators on the effects of a program to train farmers to communicate information on agricultural technology to other farmers. While there was no gender gap in communicators’ ability to acquire, retain, and use the information about the technology, other farmers were less willing to learn from female communicators. In spite of this, other farmers learned just as much about the technology and experienced similar farm yields when the communicator role was reserved for women.