Thursday, July 21, 2011

關於 risks 的一對一的交易,通常是零和遊戲。例如 期貨 (futures) 市場。

關於 risks 的 n 對 n 的交易,其實也是零和遊戲。例如 保險 (insurance)。

In those cases, which party is the consumer, and which one is the seller? And how to calculate the consumer surplus and the like?

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