Description: This paper reviews data from the accident study for years 1930-1935 to see if there are any relationships between disabled worker mortality and standard mortality that might endure to the present. From the Actuarial Research Clearing House ARCH 1990 Vol. 1.

Description: This paper expands the calculation of a group's credibility factor from a traditional univariate one-dimensional single layer model to: 1. a univariate one dimensional two layer model, 2. a multivariate one dimensional single layer model, and 3. a univariate two dimensional single layer models.