“…Large variations in regional employment growth and in the rate of new firm creation are a striking feature of the US economy (Armington and Acs, 2002;Porter, 2003). While a significant body of work explores why some regions experience more rapid growth than others (Porter, 1990(Porter, , 1998aSaxenian, 1994;Glaeser et al, 1992;Barro and Sala-i-Martin, 1995;Fujita, Venables, and Krugman, 1999), there is increasing academic and policy interest in the particular role in growth played by entrepreneurship (Davis et al, 1996;Haltiwanger, et al, 2009). A significant debate is underway regarding the role of the regional economic environment in shaping differences in the rate of regional entrepreneurship and overall economic performance (Porter, 1990(Porter, , 1998aSaxenian, 1994;Feldman, 2001;).…”