Oxley finds that smallpox consistently reduced heights, but that the fall was not statistically significant outside London or for juvenile Londoners. We demonstrate that inappropriate subdivision of the data into small samples explains the lack of significance she obtains. Further analysis of...

Spatial unit roots can lead to spurious regression results. We present a brief overview of the methods developed in M¨uller and Watson (2024) to test for and correct for spatial unit roots. We also introduce a suite of Stata commands (-spur-) implementing these techniques. Our commands...