Almost everyone residing in a developed nation knows someone who has engaged in paid work that is licit but not reported to the government (e.g., babysitting, gardening, construction, financial consulting). But while most acknowledge that such work is helpful to the individuals involved, and that informal work may enhance a sense of community, most scholars view it as a pre-modern form of exchange and something that disappears as capitalist markets expand globally. Both mainstream and heterodox economics typically assume that there is an inevitable shift towards the formalization of goods and...