The Mechanization of Reaping in Nineteenth-Century Ontario: A Case Study of the Pace and Causes of the Diffusion of Embodied Technical Change

This paper aims to provide an economic explanation of the pace and causes of the diffusion of the mechanical reaper in Ontario, 1850–1870. The analysis is based on Paul David's diffusion model, extended by the introduction of the size distribution of farms. The model is able to capture the reaper's S-shaped diffusion path. The major explanatory variable is improvements in reaper design, followed in importance by increased scale of operations and changes in factor prices. A third finding is that the effect of change in one of the three explanatory variables depends on the level of the other variables.