“…Existing theories on informal sector almost invariably assume that formality imposes fiscal burden on a firm, such as taxes or costs of complying with regulatory requirements, as well as entails benefits of better access to productive public goods, see, e.g., Azuma and Grossman, 2002;Loayza, 1996;Marcouiller and Young, 1995. This tradeoff determines then the decisions of individual economic units whether or not to go informal, and ultimately, the relative size of the informal sector. The empirical literature relates the size of the informal sector to the tax burden (e.g., Cebula, 1997;Giles and Tedds, 2002), entry costs (Auriol and Warlters, 2005); institutional quality and regulatory burden, in particular, of labor (Friedman et al, 2000;Johnson et al, 1997Johnson et al, , 1998Johnson et al, , 2000Botero et al, 2004); and financial development (Straub, 2005).…”