Abstract
It is, by now, widely recognized that the population of newly developed community has quite unbalanced age structure. Of this subject, I have made survey on several communities and made clear on relation between age structure and the composition of family types, average size of dwellings, length of terms after the developement of the community. Results : 1. Age structure of a community is deeply influenced by length of terms after its developement, and as this terms become longer, the unbalance of age structure become not so serious. 2. Also, this unbalance of age structure is concerned with the average size of dwellings in the community, wken the size is small, this unbalance is remarkable. 3. When all households in the community are devided into 10 groups by family types, each group has fixed age structure, irrespective of the status of the community. So, When the composition of households by family types of the community is provided, we are able to estimate the age structure of the whole community. The difference in age structure between two communities is due to the difference of the composition of family types between them. 4. Only a few non-related household member are included in population of the new community. 5. Each group of households by family types has fixed distribution of household size. When the composition of family types of a community is provided, we are able to estimate the distribution of household size of the whole community.
