title: Simulating market dynamics: interactions between consumer psychology and social networks.
abstract: Markets can show different types of dynamics, from quiet markets dominated by one or a few products, to markets with continual penetration of new and reintroduced products. In a previous article we explored the dynamics of markets from a psychological perspective using a multi-agent simulation model. The main results indicated that the behavioral rules dominating the artificial consumer's decision making determine the resulting market dynamics, such as fashions, lock-in, and unstable renewal. Results also show the importance of psychological variables like social networks, preferences, and the need for identity to explain the dynamics of markets. In this article we extend this work in two directions. First, we will focus on a more systematic investigation of the effects of different network structures. The previous article was based on Watts and Strogatz's approach, which describes the small-world and clustering characteristics in networks. More recent research demonstrated that many large networks display a scale-free power-law distribution for node connectivity. In terms of market dynamics this may imply that a small proportion of consumers may have an exceptional influence on the consumptive behavior of others (hubs, or early adapters). We show that market dynamics is a self-organized property depending on the interaction between the agents' decision-making process (heuristics), the product characteristics (degree of satisfaction of unit of consumption, visibility), and the structure of interactions between agents (size of network and hubs in a social network).
authors.affiliation: Center for the Study of Institutions, Population, and Environmental Change, Indiana University,408 North Indiana Avenue, Bloomington, Indiana 47408, USA. maajanss@indiana.edu
authors.forename: Marco A
authors.initials: MA
authors.lastname: Janssen
authors.forename: Wander
authors.initials: W
authors.lastname: Jager
mesh_terms: D003198:Computer Simulation / Q000706:statistics & numerical data; D003258:Consumer Behavior / Q000706:statistics & numerical data; D040541:Marketing / Q000379:methods* / Q000706:statistics & numerical data; D012944:Social Support