If buyers do not observe the quality of a product and production of quality is costly, market allocations can be very inefficient. Certification intermediaries are institutions that provide information about quality to buyers. The amount of information in the market determines the incentives...

We provide a two period model of political competition in which voters imperfectly observe the electoral promises made to other voters. Imperfect observability generates an incentive for candidates to offer excessive transfers even if voters are homogeneous and taxation is distortionary....

Politicians who care about the spoils of office may underprovide a public good because its benefits cannot be targeted to voters as easily as pork-barrel spending. We compare a winner-take-all system--where all the spoils go to the winner--to a proportional system--where the spoils of office are...

We study dynamic monopoly pricing of storable goods in an environment where demand changes over time. The literature on durables has focused on incentives to delay purchases. Our analysis focuses on a different intertemporal demand incentive. The key force on the consumer side is advance...

In most major democracies there are very fewparties compared to the number of possible policy positions held by voters. We provide an efficiency rationale for why it might be appropriate to limit the proliferation of parties. In our model, the larger the number of parties, the greater the...

A new rationale is presented for why an elite may want to expand the franchise even in the absence of threats to the established order. Expanding the franchise can turn politicians away from particularistic politics based on ad personam redistribution within the elite and foster competition...

We propose a simple theoretical model of supervised learning that is potentially useful to interpret a number of empirical phenomena. The model captures a basic tradeoff between sheltering the child from the consequences of his mistakes, and allowing him to learn from experience. We characterize...

We propose a simple theoretical model of supervised learning that is potentially useful to interpret a number of empirical phenomena relevant to the nature-nurture debate. The model captures a basic trade-off between sheltering the child from the consequences of his mistakes and allowing him to...

We present a dynamic model of adverse selection to examine the interactions between new and used goods markets. We find that the used market never shuts down, the volume of trade can be large, and distortions are lower than previously thought. New cars prices can be higher under adverse...

We use data on life insurance contracts to study the properties of long-term contracts in a world where buyers cannot commit to a contract. The data are especially suited to test a theory of dynamic contracting since they include information on the entire profile of future premiums. All the...