The Product Cycle and New England Textiles
用技术变革和产品周期理论解释新英格兰东南部为何集中了棉花纺织业，以及1880年后该产业南迁的原因。
Technological change and product life cycle concepts can be used to explain the concentration of cotton textile production in Southeastern New England during the industry's period of rapid innovation in machinery and machine tool design. Boston was the center for an agglomeration of high technology industries that were attracted by each other and the local resource pool of skilled mechanics and entrepreneurs. The movement of the textile industry to the Southeast, which took place after 1880, is linked to technological change in the product cycle that substituted unskilled labor for skilled labor and high technology inputs. The phrase "Yankee ingenuity" has become a part of the English language. If New England no longer holds all the good mechanics in the United States, there was a time when she came so near it that the term "New England mechanic" had a very definite meaning over the whole country [Roe, 1916, p. 109].