"Mobile sources contribute large percentages of each pollutant, but technology is not yet available to measure and tax emissions from each vehicle. We build a behavioral model of household choices about vehicles and miles traveled. The ideal-but-unavailable emissions tax would encourage drivers...

This paper develops a model to study how the thick market effect influences local unemployment rate fluctuations. The model demonstrates that the average matching quality improves as the number of workers and firms increases. Unemployed workers accumulate in a city until the local labor market...