Estimation of rural-urban migrationThe process of urbanization of the population of many areas of the world, particulary in the United States, has been occurring at a significant rate for the past century. This phenomenon has focused attetion on rural-urban migration, a movement for the most part distinct from in-terregional migration. Discussion of urbanization processes, as such, lies for the most part outside the scope of this book, but a few comments on the estimation of rural-urban migration are appropriate here
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