Consider the sale of mortgages by a loan originator to a buyer. As widely noted, such a transaction is subject to a severe adverse selection problem: the originator has a natural information advantage and will attempt to sell only the worst mortgages. However, a second important feature of this...

In normal times, investors buy and sell financial assets because there are gains from trade. However, markets do not always function properly — they sometimes “freeze.” An example is the collapse of trading in mortgage-backed securities during the recent financial crisis. Why does trade...

When contracts are unobserved, agents may have the incentive to promise the same asset to multiple counterparties and subsequently default. The author constructs an optimal mechanism that induces agents to reveal all their trades voluntarily. The mechanism allows agents to report every contract...