We analyze whether and how the fact that products are not sold on free, public platforms but on competing for-profit platforms affects sellers? investment incentives. Investments in cost reduction, quality, or marketing measures are here the joint and coordinated efforts by sellers. We show...

Presidential address for the Twelfth World Congress of the International Economic Association, summarising semi-formally the author's recent work and concerns. Uncertainty and incomplete markets breed demand volatility as well as price and wage rigidities. The conjunction of these leads to...

We consider a class of microeconomic models with interacting agents which replicate the main properties of asset prices time series: nonlinearities i levels and common degree of long-memory in the volatilities and co-volatilities of multivariate time series. For these models, longrange...

We show that a class of microeconomic behavioral models with interacting agents, derived from Kirman (1991, 1993), can replicate the empirical long-memory properties of the two first conditional moments of financial time series. The essence of these models is that the forecasts and thus the...

A model for a financial asset is constructed with two types of agents. The agents differ in terms of their beliefs. The proportions of the two types change over time according to a stochastic process which models the interaction between the agents. Thus, unlike other models, agents do not...

This paper tests market co-integration, market leadership and price margins in the context of the recent development of European markets for imported off-season fresh fruit countries in the southern hemisphere. The Engle-Garner and Johansen co-integration tests show that the main European...

Different equilibrium concepts have been proposed by various authors (Schweppe et al, Hogan, Chao and Peck, Wu et al) to analyse competitive electricity systems. We establish correspondences between these different models though a single framework and provide additional interpretations of these...

We analyze the problem of competitive mechanism design within the context of a model of product differentiated oligopoly. In an oligopoly setting, participation by an agent in any one firm's catalog is endogenously determined. This facts leads naturally to a modification of the classical notion...

A two-stage game is used in this paper to model a long-run market with spatially separated producers and with multi-period demands: first, firmas simultaneously and independently invest their capacities; second, after capacities are set up in the first stage and made public, firms engage in a...

We propose a model representing a newspaper producer suppying a product which can be acquired by the readers either every day per one unit at a time, or by subscription. The population of potentil buyers is differenciated according to the frequency at which they want to read the newspaper.