We argue that a patent system makes collusion among innovators more difficult. Our simple argument is based on two properties of the patent system. First, a patent not only protects against infringement but also against retaliation by former collusion members. Second, a deviator has an equal...

We study a financial market adverse selection model where all agents are endowed with initial wealth and choose to invest as entrepreneurs or financiers, or not to invest. We show that often a lack of outside finance leads to the emergence of financial markets where availability of outside...

It is commonly thought that an open economy can accommodate output shocks through either exchange rate or real sector adjustments. We formalise this notion by incorporating labour market rigidities into an “escape clause” model of currency crises. We show that the absence of structural...

Numerous attempts have been made to identify the optimal mix of patent breadth and patent life. Unfortunately, the range of contradictory results reported in literature is rather impressive. The aim of this note is to develop a very stylised model that encompasses a variety of different...

We provide evidence that increasing consumer awareness may have been underlying the rise of debit card use. We find that consumers typically use multiple payment media and that this behavior is closely related to the use of debit cards besides cash. Moreover, it turns out that the use of...