The nineteenth century was a period of expansion and transformation of American agriculture. While much is known about the process, the exact pace and timing of agricultural productivity change is still unresolved. The traditional view is one of continued progress in which output and...

"Tourism today is an activity of substantial economic importance worldwide, and has been for some time. Tourism is also of substantial economic importance in the United States, sufficient to warrant the Bureau of Economic Analysis's establishing special accounts on travel and tourism. In this...