Assorted links

1) Zero-sum ethics. People who feel good about their green purchases cut a few ethical corners later.

2) Starwood Hotels experiments with letting environmentally-minded guests opt out of room cleaning (plus get a small discount). Hat tip: Kare Anderson.

3) Split the check by bumping iPhones. Hat tip: Adam W.

4) NCAA selection bias. Playing in one of the six power conferences is worth an extra 1.75 seeds in the NCAA tournament.

5) Looking to get elementary school kids to be more active? Paint brightly colored castles, dragons, clock faces, mazes, snakes and ladders on the playground. Hat tip: Randy Scott.

Addendum: Calorie counts at chain restaurants are going to be harder to ignore, says AP.

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