Economics
4 pieces
LemonsAdverse selection, run as a used car market. Set the spread of quality and how much buyers can see.IncidenceDrag the supply and demand curves, set a tax, and watch the burden split between the two sides.DiscountingMove the rate and watch a fixed benefit in a distant year lose almost all of its present value.CooperationThe repeated prisoner's dilemma. Pick the strategies, set the payoffs and the chance the game continues.