We study the optimal and equilibrium size of cities in a city system model with environmental pollution. Pollution is …, if pollution is local or per capita pollution increases with population, we find that equilibrium cities are too large …. When pollution is global and per capita pollution declines with city size, however, equilibrium cities may be too small …

The paper studies the effect of public transport policies on urban pollution. It uses a quantitative equilibrium model … with residential choice and mode choice. Pollution comes from commuting and residential energy use. The model parameters … transport coupled with increasing transit speed affects the equilibrium. In the baseline simulation, total pollution falls by 0 …

We study the effect of energy and transport policies on pollution in two developing country cities. We use a …. Pollution comes from commuting and residential energy use. The model parameters are calibrated to replicate key variables for … how various transport and energy policies affect equilibrium pollution. Policies may be induce rebound effects from …

We use worldwide satellite data to analyse how population size and density affect urban pollution. We find that density … significantly increases pollution exposure. Looking only at urban areas, we find that population size affects exposure more than … itself. We analyse heterogeneity by geography and income levels. By and large, the influence of population on pol-lution is …