Boom-bust dynamics in a stock market participation model with heterogeneous traders

In this paper, we propose a stock market model in which participation depends upon an attractiveness measure related to the market activity and the fundamental value of the market. A market maker adjusts the stock price with respect to the current endogenous excess market demand which, in turn, depends on the demands of the different types of agents populating the economy. Market participants are also allowed to switch between different strategies. Analytical and numerical results confirm how the participation mechanism amplifies the occurrence of endogenous booms and busts, in line with empirical and experimental evidence.