A banking crisis began in Austria in May 1931 and intensified in July, when runs struck banks throughout Germany. In September, the crisis compelled Britain to quit the gold standard. Newly discovered data shows that failure rates rose for banks in New York City, at the center of the United...

This paper answers fundamental questions that have preoccupied modern economic thought since the 18th century. What is the aggregate real rate of return in the economy? Is it higher than the growth rate of the economy and, if so, by how much? Is there a tendency for returns to fall in the...