Previous research on the deregulation of the motor carrier industry has concluded that firms have become more efficient under deregulation and that costs have fallen, largely at the expense of labor. Most studies that examine the effects on labor use Current Population Survey data and find that...

Using a panel dataset on annual visits to each U.S. national park, we empirically analyze the demand for these parks using a spatial lag model, which accounts for the complementary nature of the parks. Our results suggest that increases in fuel costs, temperature increases of greater than 3 °F,...