A dynamic,policy oriented model of the regulated housing market: The Swedish prototype

The design and preliminary implementation of a dynamic, policy oriented model of the regulated housing market is presented. The model is developed in the context of the Swedish housing market institutions which combine nearly all features encountered in other nations. Free buying and selling by homeowners, black markets, swapping of dwellings and rationing of price controlled dwellings both by landlords and a public authority are included as explicit transaction options (with distinct costs) available to existing and newly formed households in the market. The model simulates a sequence of temporary annual equilibria which are obtained by balancing effective demands with effective supplies. Household mobility choices, landlords' selling decisions and the rationing of dwellings at fixed prices are derived from stochastic maximization resulting in multinomial or nested logit models of choice behavior. An aggregated preliminary 16-equation version is calibrated with partly real, partly guesstimated data for the Greater Stockholm region in the mid-seventies. Qualitative comparative statatics and income compensated policy simulations with this version illustrate some unintended effects of Swedish housing policy resulting from the manipulation of the income tax, an income tax dependent property tax and housing allowances. The model provides a tool whereby deregulating institutional changes which are potentially Pareto improving can be identified. If, however, current institutions such as the rationing of dwellings result in sufficiently lower transactions costs for households relative to the free market, then deregulation is not Pareto preferred.