coef.snreg: Extract Model Coefficients

In snreg: Regression with Skew-Normally Distributed Error Term

Extract Model Coefficients

Description

coef.snreg is the S3 method for extracting the estimated regression coefficients from an object of class "snreg".

Usage

## S3 method for class 'snreg'
coef(object, ...)

Arguments

object	an object of class "snreg", typically returned by snreg.
...	additional arguments (currently unused).

Details

Coefficients from an snreg Model

This method simply returns the coef component stored inside the fitted "snreg" object. If the object does not contain coefficient estimates (e.g., if estimation was not completed in a scaffold), an informative error is raised.

Value

A numeric vector containing the model coefficients.

See Also

snsf, snreg, lm.mle, vcov.snreg, residuals.snreg

Examples

library(snreg)

data("banks07")
head(banks07)

# Translog cost function specification

spe.tl <- log(TC) ~ (log(Y1) + log(Y2) + log(W1) + log(W2))^2 +
  I(0.5 * log(Y1)^2) + I(0.5 * log(Y2)^2) +
  I(0.5 * log(W1)^2) + I(0.5 * log(W2)^2)

# Specification 1: homoskedastic noise and skewness

formSV <- NULL   # variance equation; constant variance
formSK <- NULL   # skewness equation; constant skewness

m1 <- snreg(
  formula  = spe.tl,
  data     = banks07,
  ln.var.v = formSV,
  skew.v   = formSK
)

coef(m1)

snreg documentation built on Feb. 6, 2026, 5:08 p.m.