I had some minimal experience with a deeply informal economy once - I was a busker in the tube in London. The degree of organization involved in making sure that people get spots, and that the people that are liked get the better spots is stunning - and in 1983 it was all done on spiral notebooks with pencils.
I didn't fathom the importance of this. In The Other Path, de Soto does:
Although exclusive use has to be won by remaining in the location, it is often limited by a system of shifts whereby each pitch may be used by different people in the course of the working day. It is not unusual, for instance, to see the pitch occupied by different people in the course of the working day. It is not unusual, for instance, to see the pitch occupied by the breakfast seller in the early morning hours who then, around 9 or 10 in the morning, makes way for the juice seller who, at midday, makes way for the lunch seller who, after four in the afternoon, is followed by the vendor of herbal remedies, who later gives way the vendor of Chinese food, who stays until the end of the day. These shifts enable a single barrow to operate like a large store, maximizing its commercial value. On their own the different vendors offer only a small range of goods and services. [pg 67]