The Population Debate W ith around four babies born every minute, Philippine population is expected to hit 84.2 million by the end of the year. Growing at an average of 2.3% annually, the country’s population has increased fourfold since the 1950s. It now ranks 14th in the world in terms of population size and 8th in terms of population density. This phenomenon is seen either as an onus or a gi...

We use a frictionless neoclassical general-equilibrium model to explain cross-metro variation in population density based on three broad amenity types: quality of life, productivity in tradables, and productivity in non-tradables. Analytically, we demonstrate the dependence of quantities on amenities through substitution possibilities in consumption and production. Our calibrated model predicts...

How do the lifestyles (free-living unparasitized, free-living parasitized, and parasitic) of animal species affect major ecological power-law relationships? We investigated this question in metazoan communities in lakes of Otago, New Zealand. In 13,752 samples comprising 1,037,058 organisms, we found that species of different lifestyles differed in taxonomic distribution and body mass and were ...

Objective. Although such measures received media attention as indicative of a nationwide rebellion against sprawl, determinants of the appearance and success of 1998 and 1999 open-space preservation ballot measures have not been investigated. We suspect that, contrary to assumptions, these are not triggered by sprawled development and represent a response limited to small, wealthy communities. ...

BACKGROUND Regional differences in physician supply can be found in many health care systems, regardless of their organizational and financial structure. A theoretical model is developed for the physicians' decision on office allocation, covering demand-side factors and a consumption time function. METHODS To test the propositions following the theoretical model, generalized linear models wer...

Previous evidence has identified potential racial disparities in access to community water and sewer service in peri-urban areas adjacent to North Carolina municipalities. We performed the first quantitative, multi-county analysis of these disparities. Using publicly available data, we identified areas bordering municipalities and lacking community water and/or sewer service in 75 North Carolin...

Motivated by recent increases in population density and changes in urban development patterns, I give an update to Schelling’s landmark spatial segregation model. Inspired by the rapid construction of high-rise condominiums and apartments, I show a correlation between population density and racial diversity in San Diego neighborhoods. Using this as a basis, I give a modified high-density versio...

Predators influence prey populations both by consuming individual prey, and by inducing changes in prey behaviour that limit reproduction and survival. Because prey trade-off predation risk for foraging gains, the magnitude of predators' non-consumptive effects should depend on resource availability. Studies of non-consumptive effects generally adopt either of two strategies: (i) maintaining a ...

China is in the process of rapid urbanization, and wise land use is critical to the longterm sustainability of Chinese cities. Promotion of a compact city is typically believed to be a helpful for sustainable land use management. However, given the fact that Chinese cities are characterized by high population densities, the applicability of a more compact solution to expanding cities in China r...

We propose the savanna theory of happiness, which suggests that it is not only the current consequences of a given situation but also its ancestral consequences that affect individuals' life satisfaction and explains why such influences of ancestral consequences might interact with intelligence. We choose two varied factors that characterize basic differences between ancestral and modern life -...