# Berkson’s Paradox Strong correlations can fall apart in a larger population because the evidence doesn’t get measured in the first place [Berkson’s paradox - Wikipedia](https://en.wikipedia.org/wiki/Berkson%27s_paradox) [Web URL for this note](http://notes.benjaminreinhardt.com/Berkson’s+Paradox) [Comment on this note](http://via.hypothes.is/http://notes.benjaminreinhardt.com/Berkson’s+Paradox)