Confidence intervals of coefficients

Description

These functions calculate the confidence intervals of the coefficients from an object returned by systemfit.

Usage

   ## S3 method for class 'systemfit':
   confint( object, parm = NULL, level = 0.95, ... )

   ## S3 method for class 'systemfit.equation':
   confint( object, parm, level = 0.95, ... )

Arguments

Value

An object of class confint.systemfit, which is a matrix with columns giving lower and upper confidence limits for each estimated coefficient. These will be labelled as (1-level)/2 and 1 - (1-level)/2 in % (by default 2.5% and 97.5%).

Author(s)

Arne Henningsen ahenningsen@agric-econ.uni-kiel.de

See Also

systemfit, print.confint.systemfit, confint

Examples

data( "Kmenta" )
demand <- consump ~ price + income
supply <- consump ~ price + farmPrice + trend
labels <- list( "demand", "supply" )
system <- list( demand, supply )

## perform OLS on each of the equations in the system
fitols <- systemfit( "OLS", system, labels, data = Kmenta )

## confidence intervals of all coefficients
confint( fitols )

## confidence intervals of the coefficients of the first equation
confint( fitols$eq[[1]] )

## confidence intervals of the coefficients of the second equation
confint( fitols$eq[[2]] )