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• We review 122 academic articles published between 1985–2015 about various sources of entrepreneurship support. • Research has not produced conclusive results about the impact of entrepreneurship support on entrepreneurial activity. • No differences found between support for technology entrepreneurship support and general entrepreneurship support. • We point to future research avenues to strengthen the practical legitimacy of entrepreneurship support. Entrepreneurship has become a cornerstone of economic development. The public awareness of this phenomenon spurred great interest from the academic community and policy makers alongside the creation of a vast range of entrepreneurship support initiatives. We conduct a systematic review of 122 academic articles published during a thirty year period between 1985–2015 that help to identify a series of theoretical, empirical, and practical gaps that form the basis of a research agenda. For instance, there is a shortage of conceptual articles and few empirical studies generating theoretical contributions; samples are small and idiosyncratic; context is rarely considered; and that mechanisms of ES are largely unknown. We propose that ES should develop along four main themes that ameliorate these exposed gaps: acknowledge and understand the heterogeneity of entrepreneurs and new ventures; apply existing theories to ES; improve methods and research design; and integrate ES into the ecosystem of support. [ABSTRACT FROM AUTHOR]