Historian Robert argues that the impact of the Acts on the economies of the Thirteen Colonies was minimal; the cost was about £4 per £1,000 of income per year. The average personal income was about £100 per year. However, says that although the net burden imposed by the Acts was small in size, their overall impact on the shape and growth rate of the economy was significant since the Acts differentially affected different groups, helping some and hurting others.
