SCALE Subcommand (NOMREG command)

The SCALE subcommand specifies the dispersion scaling value. Model estimation is not affected by this scaling value. Only the asymptotic covariance matrix of the parameter estimates is affected.

N. A positive number corresponding to the amount of overdispersion or underdispersion. The default scaling value is 1, which corresponds to no overdispersion or underdispersion.

DEVIANCE. Estimates the scaling value by using the deviance function statistic.

PEARSON. Estimates the scaling value by using the Pearson chi-square statistic.