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Geographical and environmental factors

moving is 0.24: it is raised if the household head is employed, or of higher education, while it declines with increasing age and total income. The only more complex interaction which has to be added is that between labour force status, income and mobility. Among the many other results, it is summarised that better educated persons tend to have higher income in employment which produces higher transfer income upon retirement, all of which encourages the residential stability of married couple households. The analysis of the residential mobility of older women who live alone also finds that the level of income is of critical importance and leads Stapleton into a fascinating discussion about the income-paths of older people as they or their spouses cease employment or are widowed. Among the situations which are considered is the extent to which labour force participation covaries with income, the possibility of cohort distinctions between the three age groups and, more interpretatively, the implications for widows' incomes of the tendency for men to marry women of lower educational attainment. The article concludes with clear methodological recommendations; that further understanding of the residential decision processes of aged households will require separate analyses by household type, and that many of the most interesting questions can only be tackled by longitudinal studies. It is an ambitious and original application of a powerful analytical procedure. Not all the immense difficulties associated with writing a clear interpretation of a host of numerical results have been surmounted but, apart from some unfortunate typographical errors in the setting out of the models and the labelling of variables, Clare Stapleton Concord has written clearly for a non-statistical readership. The paper is packed with findings and intelligent speculation and should raise the sights of all interested in understanding the highly variable mobility behaviour of older people.