A model of consumption of residential energy in dwellings is developed, distinguishing between attributes of housing that provide direct benefits to consumers and attributes that serve as inputs in the production of final goods, for example, the thermal comfort of dwellings. Empirical estimates are made of the mode, based upon the Annual Housing Survey, and the results are used to calculate the effects of changes in energy prices on the consumption of housing, residential energy, and other goods. The analysis suggests that the adjustment process within the housing market permits a great deal of substitution in response to energy price changes. Copyright 1989 by MIT Press.

The issue of dynamic efficiency is central to analyses of capital accumulation and economic growth. Yet the question of what characteristics should be examined to determine whether actual economies are dynamically efficient is unresolved. This paper develops a criterion for determining whether an economy is dynamically efficient. The criterion, which holds for economies in which technological progress and population growth are stochastic, involves a comparison of the cash flows generated by capital with the level of investment. Its application to the United States economy and the economies of other major OECD nations suggests that they are dynamically efficient.