Access to financial services, or rather the lack thereof, is often indiscriminately decried as problem in many developing countries. This paper argues that the “problem of access” should rather be analyzed by identifying different demand and supply constraints. We use the concept of an access possibilities frontier, drawn for a given set of state variables, to distinguish between cases where a financial system settles below the constrained optimum, cases where this constrained optimum is too low, and—in credit services—cases where the observed outcome is excessively high. We distinguish between payment and savings services and fixed intermediation costs, on the one hand, and lending services and different sources of credit risk, on the other hand. We include both supply and demand side frictions that can lead to lower access. The analysis helps identify the bankable and banked population, the binding constraint to close the gap between the two, and policies to prudently expand the bankable population. This new conceptual framework can inform the debate on adequate policies to expand access to financial services and can serve as basis for an informed measurement of access.

Broad access to financial services is related to the economic and social development agenda for at least two reasons. First, a large theoretical and empirical literature has shown the importance of a well developed financial system for economic development and poverty alleviation (Beck, Levine and Loayza, 2000; Beck, Demirguc-Kunt and Levine, 2004; Honohan, 2004a). To be sure, while a causal link running from financial depth to growth has been rather convincingly established by empirical research, the search for causality between the breadth of access and growth is still on.