Hours at work and total factor productivity growth in nineteenth-century U.S. agriculture / Lee A. Craig, Thomas Weiss -- Factor endowments and contract choice / Alan Dye -- Moral hazard and asset specificity in the Renaissance : the economics of sharecropping in 1427 Florence / Francesco L. Galassi -- Squatting and the settlement of the United States : new evidence from post-gold rush California / Karen Clay, Werner Troesken -- The social prologue to the civil rights movement / Jay R. Mandle -- Migration, labor market dynamics, and wage differentials in Hawaii's sugar industry, 1901-1915 / Sumner J. La Croix, Price Fishback -- Did the black-white income gap close during the late nineteenth century? / Anthony Patrick O'Brien -- Cooperation and cooperatives in Southern European wine production / James Simpson.