This paper studies how options trading, by circumventing constraints on borrowing, permits optimistic investors to hold the desired portfolio. Unconstrained investors proceed to a portfolio rebalancing by constructing a zero-income portfolio that consists of a short position in the option, a...

This paper develops a quantitative model of trade, military conflicts, and defense spending. Trade liberalization between two countries reduces probability of an armed conflict between them, causing both to cut defense spending. This in turn causes a domino effect on defense spending by other...

This paper presents a theoretical framework to describe the behaviour of the credit rating agencies(CRAs) during the crisis, surveying some reputational game models. CRAs have been blamed of inflating ratings of the new credit risk transfer products (CRTs) and of acting in favour of issuers...

In crisis times, depositors get anxious, can run on banks, and withdraw their deposits. Correlated withdrawals of bank deposits could be mitigated if bank deposits are more diversified, i.e. held by more individuals. This paper examines the link between a broader access to bank deposits prior to...

This paper challanges the view that weak work norms in generous welfare states makes them economically unsustainable. I develop a dynamic model of family-transmitted values that has a laissez-faire equilibrium with strong work norms coexisting with a social-insurance equilibrium with weak work...

This paper identifies a new reason for giving preferences to the disadvantaged using a model of contests. There are two forces at work: the effort effect working against giving preferences and the selection e¤ect working for them. When education is costly and easy to obtain (as in the U.S.),...

We consider a two-stage principal-agent model with limited liability in which a CEO is employed as agent to gather information about suitable merger targets and to manage the merged corporation in case of an acquisition. Our results show that the CEO systematically recommends targets with low...

This paper uses the License of Right (LOR) provision implemented in Section 23 of the German Patent Act to answer the following questions: What is the distribution of the private value of the right to exclude others provided by a patent? What are the welfare implications of having a License of...

The paper analyzes the choice of organizational structure as solution to the trade-off between controlling behavior based on authority rights and minimizing costs for implementing high efforts. The analysis includes the owner of a firm, a top manager and two division heads. If it is more...

Most patent systems allow applicants to defer patent examination by some time. Deferred examination was introduced in the 1960s, first at the Dutch patent office and subsequently in many other countries, as a response to mounting backlogs of unexamined patent applications. Some applicants allow...