Two very strange results from variants of the much-studied Wason selection task point to an interpretation which has substantial implications for important choices in the world. (Prepared for AIBS conference on behavioral economics, Great Barrington MA, 2002)

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.