We present a model of private production of information in collective decision making. Agents gather costly information, and then aggregate it to produce a collective decision. Because information is a public good, it will be underprovided relative to the social optimum. A ``good'' mechanism...

We present a model of monopoly provision of money-back warranties. A buyer values an object more than its seller. They are both risk neutral and initially have no private information. The buyer can, however, acquire information and learn his true valuation for the object. Information acquisition...