The informal sector is typically characterized as being very heterogeneous and possibly composed of two clearly distinct segments, sometimes called the lower and upper tier. However, empirical evidence shows that even among lower tier entrepreneur's profitability can be quite high. The authors...

This paper investigates the patterns of capital entry barriers and capital returns in informal Micro and Small Enterprises (MSE's) using a unique micro data set seven West-African countries. The author's findings support the view of a heterogeneous informal sector that is not primarily host to...

In the past two decades, research on the informal sector has emphasized the heterogeneity of this part of the economy, example in terms of entry costs, firm size, and access to credit, forward- and backward linkages as well as human and physical capital endowments. Yet, not much research has...