Can Companies Maintain their Initial Innovative Thrust? A Study of the PC Software Industry
分析个人电脑软件行业的产品销售模式，发现公司首款产品往往最成功，后续产品销量递减，并提出了解释模型。
This paper identifies a number of patterns in the sales of products within firms and over time in the PC software industry. For example, the authors find that a firm's initial product tends to be its most successful. There is also some indication that a firm's initial product sells better than its second, its second better than its third, and so on. The authors sketch some simple models consistent with these results. Copyright 1994 by MIT Press.