Most randomized controlled trials (RCT) of social programs test interventions at modest scale. While the hope is that promising programs will be scaled up, we have few successful examples of this scale-up process in practice. Ideally we would like to know which programs will work at large scale...

In response to budget problems, many urban school systems reduced resources for getting students to come to school, like truancy officers. Chicago, for instance, went from 150 truancy officers down to, in 1991, a total of zero. Is that a good idea? We explore here the effects of increased...

In an effort to alleviate the perceived growth of a digital divide, the U.S. government enacted a major subsidy for Internet and communications investment in schools starting in 1998. The program subsidized spending by 20-90 percent, depending on school characteristics. Using new data on school...

Most randomized controlled trials (RCT) of social programs test interventions at modest scale. While the hope is that promising programs will be scaled up, we have few successful examples of this scale-up process in practice. Ideally we would like to know which programs will work at large scale...

In an effort to alleviate the perceived growth of a digital divide, the U.S. government enacted a major subsidy for Internet and communications investment in schools starting in 1998. The program subsidized spending by 20-90 percent, depending on school characteristics. Using new data on school...

Macroeconomists have long been concerned with the causal effects of monetary policy. When the identification of causal effects is based on a selection-on-observables assumption, non-causality amounts to the conditional independence of outcomes and policy changes. This paper develops a...