RELATIONSHIP BETWEEN COALE'S METHOD AND REVERSE SURVIVAL METHOD-A CRITICAL COMPARISON

The relationship between Coale's method and Reverse Survival method has been investigated in this article. Since Coale's method produces estimates which are found to be approximately equal to that of reverse survival method, it is useful to determine a constant multiplier to make Coale's estimates equal to that of the reverse survival method. In this effort, the west model life tables have been used and the constant multipliers for males and females have been found. The male's and female's multipliers are 1.0054 and 1.0083 respectively. It is interesting to note that when the estimates based on Coale's method are known, the estimates based on the reverse survival method can be obtained for both the sexes by using the common multiplier 1.01.