"Public transit in North America is in crisis. Ridership is down, fares are up, breakdowns more frequent, and in some cities trains are delayed because the tracks are literally on fire. Meanwhile, ride-sharing platforms like Uber and Lyft offer an alternative to standing on a crowded bus. And...

We examine differences in the value of statistical life (VSL) across potential wage levels in panel data using quantile regressions with intercept heterogeneity. Latent heterogeneity is econometrically important and affects the estimated VSL. Our findings indicate that a reasonable average cost...

"In the past two elections, richer people were more likely to vote Republican while richer states were more likely to vote Democratic. This switch is an aggregation reversal, where an individual relationship, like income and Republicanism, is reversed at some level of aggregation. Aggregation...