Replication is a critical component of scientific credibility as it increases our confidence in the reliability of the knowledge generated by original research. Yet, replication is the exception rather than the rule in economics. In this paper, we examine why replication is so rare and propose...

After one year, public schools managed by private contractors in Liberia raised student learning by 60 percent, compared to standard public schools. But costs were high, performance varied across contractors, and contracts authorized the largest contractor to push excess pupils and...

Factorial designs are widely used for studying multiple treatments in one experiment. While t-tests based on the “long” model (including main and interaction effects) provide valid inferences against “business-as-usual” counterfactuals, “short” model t-tests (that ignore...

Deforestation is a large contributor to climate change. Controlling deforestation is difficult, especially because there are 484 million of hectares of forest that are community owned. In principle this arrangement could lead to a tragedy of the "commons", however there could be economies of...

We use a field experiment in Tanzania to compare the effectiveness on learning of two teacher performance pay systems. The first is a Pay for Percentile system (a rank-order tournament). The second rewards teachers based on multiple proficiency thresholds. Pay for Percentile can (under certain...

Factorial designs are widely used for studying multiple treatments in one experiment. While "long" model t-tests provide valid inferences, t-tests using the "short" model (ignoring interactions) yield higher power if interactions are zero, but incorrect inferences otherwise. Of 27 factorial...

Factorial designs are widely used for studying multiple treatments in one experiment. While "long" model t-tests provide valid inferences, "short" model t-tests (ignoring interactions) yield higher power if interactions are zero, but incorrect inferences otherwise. Of 27 factorial experiments...