We build a model of credit card pricing that explicitly takes into account credit functionality. We show that a monopoly card network always selects an interchange fee that exceeds the level that maximizes consumer surplus. If regulators only care about consumer surplus, a conservative regulatory approach is to cap interchange fees based on retailers’ net avoided costs from not having to provid...

We show that in a Malthusian world an increase in taxes raises average labour productivity by culling marginal workers and reducing equilibrium population. Thus states with higher taxes will have higher labour productivity, ceteris paribus, and an increase in taxes in a particular state will generate an increase over time in labour productivity (”economic growth”). Landowners create the same ef...

The three-compartmental demographic model by Korotaeyv-Malkov-Khaltourina, connecting population size, economic surplus, and education level, is considered from the point of view of dynamical systems theory. It is shown that there exist two integrals of motion, which enables the system to be reduced to one nonlinear ordinary differential equation. The study of its structure provides analytical ...

BACKGROUND With the world's largest population, HIV spread in China has been closely watched and widely studied by its government and the international community. One important factor that might contribute to the epidemic is China's numerous surplus of men, due to its imbalanced sex ratio in newborns. However, the sex ratio in the human population is often assumed to be 1:1 in most studies of s...

\\i: examine ethnici~and individual trip taking behavior associated with MIural resource based recreation in the Florida Keys. \Ve estimate trip demand using the travel cost method. \\e then extend this model with a vanilla paran)cter adaptation to test the congruency of demand and economic vaIue XI-II~ white and Hispanic user subgroups. f&r findings indicate significant differences in price re...

The integration of Surplus Asset Management (SAM) with the circular economy (CE) provides a solution to optimize use resources, assets, and equipment throughout their life cycle, enabling new business models, increasing profitability, achieving sustainability goals, plus reducing obsolescence waste. We introduce CE-SAM as approach create value by extending cycles discarded useful equipment. dis...

The REGFLUD-project addresses the problem of diffuse pollution that is largely caused by agricultural production. The overall objective is the development and application of multi-criteria scientific methods to set-up a Decision Support System aimed at reducing diffuse pollution in river catchments subject to economic feasibility and social acceptability. The project is structured according to ...

We present a continuous-time generalization of the seminal R&D model of d’Aspremont and Jacquemin (The American Economic Review 78(5): 1133–1137, 1988) to examine the trade-off between the benefits of allowing firms to cooperate in R&D and the corresponding increased potential for product market collusion. We consider all trajectories that are candidates for an optimal solution as well as initi...

In the paper at hand we analyze the capacity planning problem of a service vendor providing a business process characterized by volatile demand to his customers. Thereby, we consider the situation that the service vendor executes certain activities by himself whereas specific parts of the business process are outsourced to external providers. For the outsourced parts, the vendor can choose betw...