3 papers
cond-mat.stat-mech2001
Efficiency and persistence in models of adaptation
R. D'Hulst, G. J. Rodgers
A cut-and-paste model which mimics a trial-and-error process of adaptation is introduced and solved. The model, which can be thought of as a diffusion process with memory, is chara…
cond-mat.stat-mech1999
Exact Solution of a Model for Crowding and Information Transmission in Financial Markets
R. D'hulst, G. J. Rodgers
An exact solution is presented to a model that mimics the crowding effect in financial markets which arises when groups of agents share information. We show that the size distribut…
adap-org1999
Three sided complex adaptative systems
R. D'hulst, G. J. Rodgers
We introduce two three sided adaptative systems as toy models to mimic the exchange of commodities between buyers and sellers. These models are simple extensions of the minority ga…