Andy and April are throwing a Halloween party at their house and start listing off all the things they need to throw a great party. The output is a great party and the inputs are a variety of different items.
See more: complements, inputs, outputs, preferences, production function, utility
Ron finds a typewriter out by the dumpster, but the noise of the machine bothers everyone in the office. While it makes him happy, he’s not taking into consideration the costs he is imposing on everyone else.
See more: externalities, private benefits, private costs, social benefits, social costs
Tom needs to move, but doesn’t have a truck. He enlists the help of Mark because he has a pickup truck and Andy/April because he needs labor. All agree to help even though Tom offers no compensation. Social norms often mean that friends help each other despite not being compensated.
See more: behavioral, fairness, gains from trade, irrationality, opportunity costs, social norms
Ann announces that she is not a fan of group dinners where everyone splits the check. This is most likely because she believes she’ll spend under the average bill and would have to pay more than her share if split equally. While it’s more efficient to split the bill, it often leads to some inequities in the final amount each person pays.
See more: behavioral, efficiency, equity, incentives, private incentives, social incentives, tradeoffs