R: Age, Period and Cohort Effects for Vital Rates

cohorts {aod} | R Documentation

## 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-`.

y

  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.

[Package aod version 1.3 Index]