The notion of social entrepreneurship has gained increasing recognition in the last years, both as an increasingly visible mode of economic action, and as an important policy tool. The paper outlines a typology that departs from a Schumpeterian view of entrepreneurship, that centers on the...

Payment card networks, such as Visa, require merchants' banks to pay substantial 'interchange' fees to cardholders' banks, on a per transaction basis. This paper shows that a network's profit-maximizing fee induces an inefficient price structure, over-subsidizing card usage and over-taxing...

Policy makers often decide to liberalize foreign bank entry but at the same time restrict the mode of entry. We study how different entry modes affect the interest rate for loans in a model in which domestic banks possess private information about their incumbent clients but foreign banks have...

In a payment card association such as Visa, each time a consumer pays by card, the bank of the merchant (acquirer) pays an interchange fee (IF) to the bank of the cardholder (issuer) to carry out the transaction. This paper studies the determinants of socially and privately optimal IFs in a card...

We develop a model of endogenous network formation in order to examine the incentives for R&D collaboration in a mixed oligopoly. Our analysis reveals that the complete network, where each firm collaborates with all others, is uniquely stable, industry-profit maximizing and efficient. This...

In diesem Beitrag werden die strategischen Interaktionen bei der Programmwahl privater und öffentlich-rechtlicher TV-Anbieter mit Hilfe eines einfachen spieltheoretischen Modelies untersucht. Dabei zeigt sich unter anderem, daß die in der gegenwärtigen medienpolitischen Diskussion heftig...

Recently the software industry has experienced fundamental changes in market structure through the entry of open source competitors, e.g. Linux‘s entry into the operating systems market. In a simple model we examine the effects of such a change in market structure from monopoly to duopoly...

This paper characterizes efficient tax subsidies for charitable contributions, and considers the properties of potential reforms. Contributions are underprovided in the absence of subsidies, and are misdirected if subsidies fail to account for all of the costs that donors incur. It is costly for...

We develop a model of policy communication by aid agencies, NGOs and intergovernmental organizations and we show how the need for fundraising affects the policy communication strategy of these organizations. To attract more funds, organizations may bias their communication. The bias depends on...

Policy makers often decide to liberalize foreign bank entry but put limitations on the mode of entry. We study how different entry modes affect the lending rate set by foreign and domestic banks. Our model captures two essential features of banking competition in emerging markets: Domestic banks...