xBookUtils.terms['fn_12_501'] = "Schumpeter, Joseph. 1975 [1942]. Capitalism, Socialism and Democracy<\/em>. New York: Harper. See, in particular, pp. 82–85.";
xBookUtils.terms['fn_12_502'] = "Based on data from 1972 to 1992 in Adams, William J<\/strong>. 1993. TV program scheduling strategies and their relationship to new program renewal rates and rating changes. Journal of Broadcasting and Electronic Media<\/em> 37:<\/strong> 465–475. The renewal rate is probably lower today as there are more television stations and viewers are more difficult to keep.";