Random-effect covariance for a TMB discounting model

For a 2-RE fit returns the 2x2 covariance with StdDev and the joint correlation (a structural 0 for pdDiag; the first row's Corr is NA by convention). The Term column reflects the fitted pair: (k, phi) for a phi-target fit (k + phi ~ 1) or (k, s) for an s-target fit (k + s ~ 1, GM/Rachlin only). For a 1-RE fit (k ~ 1) returns the single random-intercept SD on the log-k scale.

Usage

# S3 method for class 'beezdiscounting_tmb'
VarCorr(x, sigma = 1, ...)

Arguments

x

A beezdiscounting_tmb fit.

sigma

Ignored (present for the nlme::VarCorr() generic).

...

Unused.

Value

A data frame with Group, Term, Variance, StdDev, and (2-RE) Corr.