War History of American Railroads

Railroads and American Law

Railroads and American Economic Growth : A

This paper examines the historical impact of railroads on the American economy, with a focus on quantifying the aggregate impact in the agricultural sector in 1890. Expansion of the railroad network may have affected all counties directly or indirectly — an econometric challenge that arises in many empirical settings. However, the total impact on each county is captured by changes in that count...

Railroads and American Economic Growth: a " Market Access " Approach *

This paper examines the historical impact of railroads on the American economy. Expansion of the railroad network and decreased trade costs may affect all counties directly or indirectly, an econometric challenge in many empirical settings. However, the total impact on each county can be summarized by changes in that county’s “market access,” a reduced-form expression derived from general equil...

Railroads and American Economic Growth: New Data and Theory∗

This paper examines the impact of railroads on American economic growth. Drawing on general equilibrium trade theory, changes in counties’ “market access” captures the aggregate impact of local changes in railroads. Using a new spatial network of freight transportation routes, we calculate county-to-county lowest transportation costs and counties’ implied market access. As railroads expanded fr...

Tragedy into drama: an american history of tourniquet use in the current war.

BACKGROUND Although the scientific results of recent tourniquet advances in first aid are well recorded, the process by which tourniquet use advances were made is not. The purpose of the present report is to distill historical aspects of this tourniquet story during the current wars in Afghanistan and Iraq to aid scientists, leaders, and clinicians in the process of development of future improv...