This dissertation uses the large negative shock to the British cotton textile industry, caused by the U.S. Civil War, in order to test three long-running questions about innovation. Chapter one provides the first empirical test of the leading theory of directed technical change, introduced by...

While the Industrial Revolution brought economic growth, there is a long debate in economics over the costs of the pollution externalities that accompanied early industrialization. To help settle this debate, this paper introduces a new theoretically-grounded strategy for estimating the impact...

Mortality was extremely high in the industrial cities of the 19th century, but little is known about the role played by pollution in generating this pattern, due largely to a lack of direct pollution measures. I overcome this problem by combining data on the local composition of industries in...