In a recent blog at Open Philanthropy Project summarizing some of his research on the effect of incarceration on crime, David Roodman conducted, count them, 8 replications. Here is what he said: “Among three dozen studies I reviewed, I obtained or reconstructed the data and code for eight. Replication and reanalysis revealed significant methodological concerns in seven and led to major reinterpretations of four.”

To read more, click here.

To read the response of one of those whose work was replicated (Alex Tabarrok), click here.