In almost every city, some portion of daily commerce happens outside a shop's four walls — on a folding table, a pushcart, a blanket spread across pavement. Municipal policy tends to frame this activity through the lens of regulation and disorder. Ethnographers who spend time with vendors usually find something more organized underneath.
Informal markets run on dense, locally enforced rules about territory, timing, and reciprocity. A vendor's spot on a given corner is rarely random; it is often inherited, negotiated, or defended through relationships with neighbors, police, and other sellers that outsiders never see written down anywhere.
These arrangements also function as informal welfare systems. Vendors extend credit to regular customers, cover each other's stalls during emergencies, and pool resources for shared costs like storage or transport. None of this shows up in official statistics, which is precisely why long-term fieldwork remains the best tool for describing it.
Understanding the informal economy on its own terms — rather than as a deviation from formal commerce — has become one of urban anthropology's most consistent contributions to public debate about cities and inequality.