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 …

income in pollution mitigation in exchange for a transfer to their old-age capital income paid by the next generation. We … bargaining leads to a steady state with lower pollution stock and higher income compared to the steady state without a contract … improving mitigation is no longer possible and the economy converges to a steady state with high pollution stock and low income …

baseline model by adding climate-induced fluctuations around the growth trend and stock-pollution effects, demonstrating …

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 …