Changes in life expectancy and in active life expectancy may have effects on the fiscal integrity of both the Social Security and Medicare programs. Analysis of the fiscal stability of these programs shows that the most serious problem may be the growth of Medicare expenditures projected to...

Information on 7,184 respondents of the Duke University and Johns Hopkins University Epidemiologic Catchment Areas (ECA) studies were analyzed using a fuzzy set classification procedure called Grade of Membership (GoM) analysis. A formal description of GoM analysis and its relationship to other...

The analysis of many social and health policy issues requires the use of multiple data sources from a diverse body of scientific and technical studies. Although individual data sets are rigorously analyzed, integration of the results of these analyses to resolve policy questions is often...

Let Y=(Yt)t=0) be an unobserved random process which influences the distribution of a random variable T which can be interpreted as the time to failure. When a conditional hazard rate corresponding to T is a quadratic function of covariates, Y, the marginal survival function may be represented...