“…It is also consistent with theories that suggest there are two types of entrepreneurship: necessity-based (e.g., Borjas & Bronars, 1989;Joona & Wadensjo, 2013) and opportunity-driven-some are pushed into entrepreneurship because they lack other whereas others pursue entrepreneurial opportunities when they perceive the potential rewards to be greater than those obtained from wage employment options (e.g., Carnahan, Agarwal, & Campbell, 2012;Gimeno, Folta, Cooper, & Woo, 1997;Hartog, Van Praag, & Van Der Sluis, 2010;Joona & Wadensjo;Lofstrom, Bates, & Parker, 2014;Sørensen & Sharkey, 2014). This volume opens with an article by Berkjout, Hartog, and van Praag (2016) that takes the next step in this line of reasoning to ask how structural features of the wage distribution within an occupation, and hence the opportunity cost of leaving that occupation, impact entrepreneurial propensities.…”