A Neigborhood Estimation for Complete Life Table Based on Abridged Data
Wang Yan (Beijing Municipal Research Institute of Environment Protection)Wang Hongrui ;Zhang Surong ;Yan Wujiu(Beijing Normal University)(Department of Geography)
A new method is given to use the abridged census dats more suffi-ciently,Rather than the traditional abridged life table,a complete life table esti-mated on abridged data is fairly close to the complete life table based on the complete data. It approximates the U-shaped force of mortality by an inverse quadratic function and a series of quadratic functions fitting each three-points successively along the age axis issuing a piece-wise smooth function,with which a traditional complete life table can be constructed, This method can be considered as an extension of existing spline methods, such as Wittemore and Keller(1986,Biometrics 42,495-506).The problem of overestimation and not unanimity in existing methods for construction of the abridged life table might be solved with this method. The comparisons between methods of this paper and of Chiang(1972,Journal of American Statistical Association 67,538-541)for data analysis of California,1970 and Japanese,1984 have been given as ex-amples.
【CateGory Index】： O211