The paper describes three novel regularities in public choice games, tied to a Darwinian argument about rules that could be expected to govern social choice. Note: This is a revised version of this paper, originally titled "Two Tests For ‘NSNX’ Effects In Cooperation Experiments," and...

This account of the well-known Monty Hall puzzle is designed to provide a sharp focus on just how the illusory intuition arises by excluding various frequently-suggested possibilities.