This volume includes seven papers in quantitative economic history. Four were accepted through our regular channels. These include Harald Edquist and Magnus Henrekson on "Technological Breakthroughs and Productivity Growth", Scott Redenius on "New National Bank Loan Rate Estimates, 1887-1975", Ebru Guven Solakoglu on the "Net Effect of Railroads on Stature in the Post Bellum Economy", and Pedro Lains on "Growth in a Protected Environment, Portugal,...