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  • Stochastic panel-data models of urban shopping behaviour? 1. Purchasing at individual stores in a Single City
  • of Vaasa, Finland in 1971 and 1980. In the model building, we supposed that the visiting frequencies follow some stochastic process. The Poisson process proved to be the most appropriate choice. On the basis of the Poisson process an efficient estimation
  • network on which it is possible to compare one year with the others. For predicting stochastically piezometric levels, piezometric differences between a given month to its following have been studied. It appears that variations are erratic during winter