Using variables derived from several conceptualizations of the urban environment, this study assesses the predictability of levels of fiscal support (as measured by per capita property tax revenue) among21municipal governments at two points in time. The data bear out the notion that it is useful to consider revenue level as a funcion of social variables differing in time and space. The results also suggest that current views of environmental impact on municipal government make the urban system excessively static. Findings indicate that over time one can expect marked changes in the influence of various environmental features.