Once primarily used in medical clinical trials, random assignment experimentation is now accepted among social scientists across a broad range of disciplines. T

A fascinating account of how radical researchers have used experiments to overturn conventional wisdom and shaped life as we know it Experiments have consistent

The first comprehensive history of the Obama administration's evidence-based initiatives. From its earliest days, the Obama administration planned and enacted s

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Discussions of the use and limits of randomized control trials, considering the power of theory, external validity, gaps in knowledge, and what issues matter. T