Kerem Cosar, Nezih Guner, James Tybout The informal sector accounts for a large part of the economy in most developing countries, yet it is understudied in economics. The informal sector captures, broadly speaking, all activities that are invisible to the government: operations of firms that are not registered with tax authorities and/or the employment of workers who are not covered by labour market regulations and do not receive benefits or severance payments when laid off. Recent empirical work that has studied trade liberalisation episodes in developing countries suggests that shifts into ...