Conventional approaches to the measurement of income-poverty require the ability to identify the poor by reference to a specified poverty line. On the face of it, it may appear to be unproblematic to specify such a poverty line. There are, however, analytical and conceptual difficulties entailed...

The present paper is a selective overview, very considerably based on work in which the author himself has been involved, of the difficulties which can arise in the measurement of poverty and inequality when one compares populations of differing size. The paper begins with certain problems...