Professional development — formal in-service training to upgrade the content knowledge and pedagogical skills of teachers — is widely viewed as an important means of improving teaching and learning. While many interventions include professional development, professional development was the...

We discuss eight randomized evaluations intended to increase vaccination uptake conducted by the US General Services Administration’s Office of Evaluation Sciences (OES). These evaluations had a median sample size of 55,000, deployed a variety of behaviorally-informed direct communications,...

This paper reexamines data from the New York City school choice program, the largest and best implemented private school scholarship experiment yet conducted. In the experiment, low-income public school students in grades K-4 were eligible to participate in a series of lotteries for a private...