This paper studies a competitive market model for trading indivisible commodities. Commodities can be desirable or undesirable. Agents' preferences depend on the bundle of commodities and the quantity of money they hold. We assume that agents have quasi-linear utilities in money. Using the...

In this paper, we study the incumbent's incentive to share its essential facility when there exist network effects. We show that without network effects, the incumbent will charge an access fee high enough to deter the entry. with network effects, however, the incumbent always has an incentive...

We propose a new location model where consumers are allowed to make multiple purchases (i.e., one unit from each firm). This model fits many markets (e.g. newspapers, credit cards, scholarly journals, subscriptions to TV channels, etc.) better than existing models. A common feature of these...

Team size in scientific research and its geographic dispersion are important because research collaboration indicates the division of labor, and because collaboration is one channel of by which knowledge spills over. For both reasons, economic efficiency of the knowledge-creating industries is...

Shelling (1960) among others have argued that contributions to public goods may be larger if people spread their contributions and give one small contribution at a time. Examining a threshold public good environment, Marx and Matthews (2000) show that multiple rounds may secure a provision level...

The incomplete nature of contracts governing international transactions limits the extent to which the production process can be fragmented across borders. In a dynamic, general-equilibrium Ricardian model of North-South trade, the incompleteness of international contracts is shown to lead to...

Affine term structure models are widely applied for pricing of bonds and interest rate derivatives but the consistency of affine term structure models (ATSM) in cases when the short rate may be unbounded from below remains essentially an open question. The main stress in the classification paper...

Based on Bergara and Licandro´s Model (2001), this paper studies the relationship between the requirements of prudential regulations for risks management and its effects on the loans portfolio. The financial regulation (Basle´s Accords, I and II) becomes sensible to risks (using Value at...

In this paper I describe group theoretic methods that can be used for analyzing the boundary problems, which arise when the Hamiltonian method is applied to solve the relaxed problem for the multidimensional screening problem. This technique can provide some useful insights into the structure of...

Financial Market is a Complex System.Quantitative analysis of Complex system is difficult. There is little mensurable method in this field. But we often need describe the running pattern in complex system. How can we describe and find the running pattern (structure) change in complex system. The...