Template-type: ReDIF-Paper 1.0 Author-Name: Babutsidze, Zakaria Author-Email: babutsidze@merit.unu.edu Author-Workplace-Name: UNU-MERIT Author-Name: Cowan, Robin Author-Email: cowan@merit.unu.edu Author-Workplace-Name: UNU-MERIT, Maastricht University, and BETA - Universite Louis Pasteur Title: Inertia, Interaction and Clustering in Demand Abstract: We present a discrete choice model of consumption that incorporates two empirically validated aspects of consumer behaviour: inertia in consumption and interaction among consumers. We specify the interaction structure as a regular lattice with consumers interacting only with immediate neighbours. We investigate the equilibrium behaviour of the resulting system and show analytically that for a large range of initial conditions clustering in economic behaviour emerges and persists indefinitely. Short-run behaviour of the model is investigated numerically. This exercise indicates that equilibrium properties of the system can predict a short-run behaviour of the model quite accurately. Classification-JEL: D11, D83, C65 Keywords: Clustering, Interaction, Habits, Consumer choice Series: UNU-MERIT Working Papers Creation-Date: 2009 Number: 045 File-URL: http://www.merit.unu.edu/publications/wppdf/2009/wp2009-045.pdf File-Format: application/pdf File-Size: 275 Kb Handle: RePEc:unm:unumer:2009045