| Автор | Ledent, Jacques |
| Дата выпуска | 1986 |
| dc.description | This paper seeks an appropriate specification of the migration exchange between rural and urban areas so that the implied evolution of the degree of urbanization agrees with its commonly observed S-shape. After demonstrating that the gross migration flows between rural and urban areas should be specified as nonlinear functions of the population in the origin sector, the paper introduces a model in which such flows are represented by gravity-type functional forms. When proper bounds are imposed on the parameters of these functional forms, the model yields an evolution of the degree of urbanization that is depicted by a logistic curve. It thus can be used to give insights into the time paths of three basic urbanization variables: the urban-rural growth rate differential, the rural net outmigration rate, and the urban net immigration rate. All take on a zero value at the two extremes of the urbanization process and evolve in between according to a bell-shaped curve. These findings are illustrated by applying the model to data from the United States for the period 1790-1980. |
| Издатель | Sage Publications |
| Название | A Model of Urbanization with Nonlinear Migration Flows |
| Тип | Journal Article |
| DOI | 10.1177/016001768601000303 |
| Print ISSN | 0160-0176 |
| Журнал | International Regional Science Review |
| Том | 10 |
| Первая страница | 221 |
| Последняя страница | 242 |
| Аффилиация | Ledent, Jacques, INRS-Urbanisation, University of Quebec, 3465 Durocher Street, Montreal, Quebec H2X 2C6, Canada |
| Выпуск | 3 |
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