grr {ui}

Gradient for the loglikelihood used by ui.probit

Description

This function derives the gradient in order for ui.probit to run faster.

Usage

grr(par, rho, X.z = X.z, X.y = X.y, y = y, z = z)

Arguments

par

Coefficients.

rho

Rho.

X.z

Covariate matrix for missingness.

X.y

Covariate matrix for outcome.

y

Outcome.

z

Missing or not.