The substance of entrepreneurship and the entrepreneurship of substances

Purpose – The purpose of this paper is to clarify the distinctions and complementary of William Baumol and Israel Kirzner’s classifications of and insights into entrepreneurship, and thus providing a more complete taxonomy of the substance of entrepreneurial activity. This paper also attempts to clarify distinctions between unproductive and destructive entrepreneurship. Design/methodology/approach – This paper illustrates a more complete taxonomy of the substance of entrepreneurial activity by examining entrepreneurial innovation in drug markets both legal and illegal, identifying cases of productive, unproductive, superfluous, erroneous, destructive, and protective entrepreneurship. Findings – This paper finds that the classifications of entrepreneurship (productive, superfluous, unproductive, erroneous, protective and destructive) put forth by Baumol, Kirzner, and the institutional entrepreneurship literature are complementary. While Baumol seeks to explain the disequilibrating tendencies of entrepreneu...