Does the death penalty save lives? A surge of recent interest in this question has yielded a series of papers purporting to show robust and precise estimates of a substantial deterrent effect of capital punishment. We assess the various approaches that have been used in this literature, testing...

Compiling data from dozens of archival sources, I compile the most extensive series to date of the long-run imprisonment rate for five English-speaking nations: Australia, Canada, England and Wales, New Zealand and the United States. These series are constructed as a share of adults rather than...