This paper seeks to map out the emergence and evolution of entrepreneurship as an independent field in the social science literature from the early 1990’s to 2009. Our analysis indicates that entrepreneurship has grown steadily during the 1990’s but has truly emerged as a legitimate academic discipline in the latter part of the 00’s. The field has been dominated by researchers from Anglo-Saxon countries over the past twenty years, with particularly strong representations from the US, UK, and Canada. The results from our structural analysis, which is based on a core document approach, point to five large knowledge clusters and further 16 sub-clusters. We characterize the clusters from their cognitive structure and assess the
strength of the relationships between these clusters. In addition, a list of most cited articles is presented and discussed.