Headey, Bruce; Krause, Peter; Habich, Roland - 1991
-thirds societies in which two-thirds enjoy the benefits of affluence, while one-third are locked into poverty or near-poverty. This … finding is that poverty (defined as receiving less than half of average net household equivalent income) is mostly short term … and that nothing like one-third are locked into poverty On the other hand, far more people than had previously been …