But the growing  1  Claudia Goldin and Lawrence F. Katz, The Race Between Education and Technology, Cambridge, Mass. : Harvard University Press, 2008. 2  Claudia Goldin and Lawrence F. Katz, “Human Capital and Social Capital: The Rise of Secondary Schooling in America,” NBER Working Paper no.
6439,March 1998; Claudia Goldin and Lawrence F. Katz, 1995, “The Decline of Non-competing Groups: Changes in the Premium to Education, 1890 to 1940,” NBER Working Paper no. 5202, August 1995. 3  Claudia Goldin, “America’s Graduation from High School: The Evolution and Spread of Secondary Schooling in the Twentieth Century,” Journal of Economic History, June 1998, vol. 58, no. 2, pp. 345–374.