6Agarwal, Rajshree and Gort, Michael.1996. "The Evolution of Markets and Entry, Exit and Survival of Firms," Review of Economics and Statistics, 78 (3), pp. 489-498
7Caves, Richard E. 1998. " Industrial Organization and New Findings on the Turnover and Mobility of Firms," Journal of Economic Literature,36, pp. 1947-1982
8Cort, Michael and Klepper, Steven. 1982."Time Paths in the Diffusion of Product Innovation," The Economic Journal, 92, pp. 630 - 653
9Klepper, Steven. 1996. "Entry, Exit,Growth, and Innovation over the Product Life Cycle," American Economic Review, 86 (3), pp. 562- 583
10Klepper, Steven. 1997. "Industry Life Cycle,"Industry and Corporate Change, 6(1), pp. 1-37.
