This article provides a non-technical survey on recent topics in the theory of contracts. The hold-up problem is presented and the incomplete contracts approach is discussed. Emphasis is put on conceptual problems and open questions that await further research.

Consider a seller who can make an observable but non-contractible investment to improve an intermediate good that is specialized to a particular buyerʼs needs. The buyer then makes a take-it-or-leave-it offer to the seller. The seller has private information about the fraction of the ex post...

We consider the case of an upstream seller who works to improve an asset that has been specialized to a downstream buyer's needs. The buyer then makes a take it or leave it offer to the seller about how the future surplus should be split. We assume that the seller from the outset has private...

In this paper it is demonstrated that voluntary bargaining over a collective decision under asymmetric information may well lead to ex post efficiency if the default decision is non-trivial. It is argued that the default decision may be interpreted as a 'simple' contract that the parties have...

Consider the following situation. There are two parties, a buyer who is interested in one unit of a specific good, and a seller who can produce this good for the buyer. While producing the good, the seller can exert more or less unobservable effort (hidden action). When the buyer sees the...

A buyer and a seller can exchange one unit of an indivisible good. While producing the good, the seller can exert unobservable effort (hidden action). Then the buyer realizes whether his valuation is high or low, which stochastically depends upon the seller's effort level (hidden information)....

The analysis of adverse selection problems in seller-buyer relationships has typically been based on the assumption that private information is uncertifiable, while in practice it may well be certifiable. If a buyer has certifiable private information, he can conceal evidence, but he cannot...

In the property rights approach to the theory of the firm (Hart, 1995), parties bargain about whether or not to collaborate after non-contractible investments have been made. Most contributions apply the regular Nash bargaining solution. We explore the implications of using the generalized Nash...