Economic discussion of ageing has been largely neoclassical in approach. Ageing has become a specialism within population economics, which is itself a specialism within the neoclassical mainstream. An alternative view has come from authors in sociology and social policy, who have produced their own 'political economy of old age'. In contrast with neoclassical individualism, sociological depictions of aging have stressed the social construction of old age and the structured dependency of the elderly. Non-neoclassical economists have had little to say about ageing, despite some relevant work in the early days of Keynesianism. This paper argues that a combination of structural ideas from sociology and disequilibrium ideas from Keynesian and non-neoclassical economics can provide a suitable framework for the economics of ageing.