1976 年 3 巻 3 号 p. 1-16
In the article the author is concerned with the part of demographic factors in the explanation of the distribution of earing income and their implications to the economic status of the old aged dependents. It is disclosed by the full exploitation of Sample Survey of Recipients of Health Insurance that such demographic factors as sex and age of the earners of wages and salaries contribute to the formation of the pattern of earning income by different scale of enterprises and diffrent sex of workers. It is also discovered from the statical analysis of the Survey that the economic status of the old aged deependents is substantially affected by the age effect of those who support the old aged.