Europe will be challenged by demographic changes over the next few decades, even under favourable assumptions about fertility and migration, but the economic effects are not yet fully understood. This paper studies the effects of population ageing on economic growth, capital deepening and...

The analysis finds that in addition to U-shaped paths of environmental quality arising for growth in income per capita, growth in population can also produce socially efficient patterns that are U-shaped. Sufficient conditions for both types of paths are identified for a range of models and...

"We show that much of the recent reported decrease in interstate migration is a statistical artifact. Before 2006, the Census Bureau's imputation procedure for dealing with missing data inflated the estimated interstate migration rate. An undocumented change in the procedure corrected the...