cohorts {aods3}

Age, Period and Cohort Effects for Vital Rates

Description

Number of prostate cancer deaths and midperiod population for nonwhites in the USA by age and period. The cohort index k is related to age and period indices (i and j, respectively) by k = j + I - i, where I = max(i) (Holford, 1983, Table 2).

Usage

data(cohorts)

Format

A data frame with 49 observations on the following 4 variables.

period

A factor with levels 1935-, 1940-, ..., 1965-.

age

A factor with levels 50-, 55-, ..., 80-.

m

Numeric: the number of prostate cancer deaths.

n

Numeric: the midperiod population size.

References

Holford, T.R., 1983. The estimation of age, period and cohort effects for vital rates. Biometrics 39, 311-324.