@article{oai:cuc.repo.nii.ac.jp:00004267,
 author = {ニシムラ, フミタカ and NISHIMURA, Fumitaka},
 issue = {3},
 journal = {千葉商大論叢},
 month = {Dec},
 note = {P(論文), I focus on discussing assortment function, which is also necessary for demand and supply coordination. I analyze characteristics of structures in vertical market by formulation of the function model in this sturdy. W. Alderson explains the activities for filling the gap "sorting" as (1) sorting out, (2) accumulation, (3) allocation, and (4) assorting activities. But assorting activities cannot be carried out by individual manufacturers producing a single or a few products, because to assort products from several firms is possible only by middlemen. As a result, it creates the ultimate consumers' demand. Accumulation and allocation are two sides of the same activity. Therefore, I here concentrate sorting out, accumulation and assorting in this study. The cost of performing sorting out and accumulation activities is hypothetically calculated for the case where there is no middleman with the structure of production and consumption given. But as for assorting activities, l do not apply the method which obtains the eauilibrium number of middlemen by taking various structures of middlemen into account. The cost of the assortment function depends on the average cost of the above three operations. the number of manufacturers, of consumers, of the customers for segmented markets, of assortment carried out annually, of products distributed, and of classified groups, investment and so on. I show the important theoretical hypotheses derived from the models constructed: 1. In case middlemen carry out accumulation and allocation activities in place of manufacturers, the equilibrium number of middlemen is explained by the number of manufacturers, ultimate consumers, and the customers in a segmented market when investment costs are ignored. 2. The equilibrium number of middlemen heavily depends on the number of customers in a segmented market. The greater the latter, the greater the former. 3. The necessary condition that a positive number of middlemen exist is provided that both the number of manufacturers and ultimate consumers are two or more than two. 4. The equilibrium number of middlemen increases as the number of manufacturers increases or that of ultimate consumers decreases. 5. The equilibrium number of middlemen increases as the number of the customers in a segmented market approach the number of ultimate consumers.},
 pages = {17--39},
 title = {Assortment Function Model in the Marketing Structures},
 volume = {40},
 year = {2002}
}