British Policy and Colonial Growth: Some Implications of the Burden from the Navigation Acts

Very few issues in American economic history have stirred as many contrasting views as the debate regarding the effects of the British Navigation Acts on the Thirteen American Colonies. The most recent entry in the long argument is Robert Thomas' analysis of the problem. Thomas constructs quantitative estimates of the impact of the Acts which are designed “… to measure, relative to some hypothetical alternative, the extent of the burdens and benefits stemming from imperial regulation of the foreign commerce of the 13 colonies.” He presents these estimates to test the hypothesis that: “… membership in the British Empire, after 1763, did not impose a significant hardship upon the American Colonies.” Thomas has employed new data in constructing his estimates, and he has carefully brought economic theory explicitly into the discussion. His framework requires the construction of a “counterfactual” hypothesis against which to evaluate the impact of policy. As he views it: “The only reasonable alternative in this case is to calculate the burdens or benefits of British regulation relative to how the colonists would have fared outside the British Empire, but still within a mercantilist world.” Given such a model, the value of the burden and benefit is estimated in terms of market prices and the pattern of trade which would have emerged had the colonies been free in 1763.