Population density gradients for South Africa’s cities are quite small in absolute value, indicating a relatively flat population distribution across the cities. In contrast employment is less flatly distributed than the population. The relationship between employment densities and distance across South African cities has remained constant between 1996 and 2001 whilst there has been on average ...

Which municipalities and locations within the United States contribute the most to household greenhouse gas emissions, and what is the effect of population density and suburbanization on emissions? Using national household surveys, we developed econometric models of demand for energy, transportation, food, goods, and services that were used to derive average household carbon footprints (HCF) fo...

In this paper, I examine 1960 to 1980 trends in suburbanization and education segregation within the black and white populations of four U.S. metropolitan areas. This analysi s provides a test of Wilson’s (1987) social isolation thesis which claims that, during the 1960s and 1970s, middle-class black s moved out of inner-city ghettos into suburbs, thereby isolating themselves from lower-class b...

The paper focusses on spatial diffusion patterns of human settlements in the Netherlands. After a survey of the post-war urbanization, suburbanization, desurbanization and re-urbanization trends, a conceptual and methodological framework for spatial choice analysis is presented. Both a macroscopic and a mxcroscopic approach is discussed, foliowed by some models to study the deterinxnants of spa...

Research on endocrine disruption in frog populations, such as shifts in sex ratios and feminization of males, has predominantly focused on agricultural pesticides. Recent evidence suggests that suburban landscapes harbor amphibian populations exhibiting similar levels of endocrine disruption; however the endocrine disrupting chemical (EDC) sources are unknown. Here, we show that sex ratios of m...