We present a formal model of symmetric n-firm Cournot oligopoly with a heterogeneous population of profit optimizers and imitators. Imitators mimic the output decision of the most successful firms of the previous round a là Vega-Redondo (1997). Optimizers play myopic best response to the opponents’ previous output. The dynamics of the decision rules induce a Markov chain. As expression of bound...

One approach for artificially intelligent agents wishing to maximise some performance metric in a given domain is to learn from a collection of training data that consists of actions or decisions made by some expert, in an attempt to imitate that expert’s style. We refer to this type of agent as an expert imitator. In this paper we investigate whether performance can be improved by combining de...

Introduction: Pilomatrixomas are benign neoplasms derived from hair follicle matrix cells. They among the most common soft tissue head and neck tumors of childhood. typically isolated, slow-growing, firm, nontender masses that adherent to epidermis but mobile in subcutaneous plane. This clinical presentation is so characteristic many experienced surgeons will excise suspected pilomatrixomas wit...

I present a formal model of symmetric n-firm Cournot oligopoly. Instead of assuming a homogeneous population of profit maximizing firms, the set of firms is divided into two subpopulations of either imitators or optimizers. Imitators mimic the output decision of the most successful firms of the previous round. Optimizers are myopic best response players to the previous market output. The dynami...

We study a multi-step hider-seeker game where the hider is moving on a graph and, in each step, the seeker is able to search c subsets of the graph nodes. We model this game as a zero-sum Bayesian game, which can be solved in weakly polynomial time in the players’ action spaces. The seeker’s action space is exponential in c, and both players’ action spaces are exponential in the game horizon. T...

We introduce an order driver market model with heterogeneous traders that imitate each other on a dynamic network structure. The communication structure is endogenous and evolves using a fitness mechanism based on agents wealth. We assess how imitations among otherway noise traders, can give rise to herd behaviour and how this behaviour affects asset prices. We show how price paths are strongly...

This paper describes simple ‘Schumpeterian games’ that help to explore the microfoundations of (national) innovation systems and the related policy issues. Thus it tries to marry the Schumpeterian approach to innovation and imitation with the simpler but very powerful results of evolutionary game theory. The paper identifies several roles and subgames in an innovation system, based on the playe...

A question in the modeling of populations of imitators is if simple imitation or imitation based on learning rules can improve the fitness of the individuals. In this investigation this problem is analyzed for two kinds of imitators involved in a cooperative dilemma: One kind of imitators has a replicator heuristics, i.e. individuals which decide its new action based on actions of their neighbo...