This paper reports the results of a natural field experiment to measure the effect of exposure to newspapers on political behavior and opinion. The Washington DC area is served by two major newspapers, the Washington Times and the Washington Post. We randomly assigned individuals either to...

This paper reports the results of a natural field experiment to measure the effect of exposure to newspapers on political behavior and opinion. The Washington DC area is served by two major newspapers, the Washington Times and the Washington Post. We randomly assigned individuals either to...

We were asked to discuss specific methodological approaches to evaluating three hypothetical interventions. This article uses this forum to discuss three misperceptions about randomized trials. First, nobody argues that randomized trials are appropriate in all settings, and for all questions....