translogEst: Estimate a translog function

In micEcon: Microeconomic Analysis and Modelling

Estimate a translog function

Description

Estimate a translog function.

Usage

   translogEst( yName, xNames, data, shifterNames = NULL,
      dataLogged = FALSE, ... )

   ## S3 method for class 'translogEst'
print( x, ... )

Arguments

yName	a string containing the name of the dependent variable.
xNames	a vector of strings containing the names of the independent variables.
data	data frame containing the data (possibly a panel data frame created with pdata.frame).
shifterNames	a vector of strings containing the names of the independent variables that should be included as shifters only (not in quadratic or interaction terms).
dataLogged	logical. Are the values in data already logged? If FALSE, the logarithms of all variables (yName, xNames, shifterNames) are used except for shifter variables that are factors or logical variables.
x	An object of class translogEst.
...	further arguments of translogEst are passed to lm or plm; further arguments of print.translogEst are currently ignored.

Value

a list of class translogEst containing following objects:

est	the object returned by lm or plm.
nExog	length of argument xNames.
nShifter	length of argument shifterNames.
residuals	residuals.
fitted	fitted values.
coef	vector of all coefficients.
coefCov	covariance matrix of all coefficients.
r2	R^2 value.
r2bar	adjusted R^2 value.
nObs	number of observations.
model.matrix	the model matrix.
call	the matched call.
yName	argument yName.
xNames	argument xNames.
shifterNames	argument shifterNames.
dataLogged	argument dataLogged.

Author(s)

Arne Henningsen

See Also

translogCalc, translogDeriv and quadFuncEst.

Examples

   data( germanFarms )
   # output quantity:
   germanFarms$qOutput <- germanFarms$vOutput / germanFarms$pOutput
   # quantity of variable inputs
   germanFarms$qVarInput <- germanFarms$vVarInput / germanFarms$pVarInput
   # a time trend to account for technical progress:
   germanFarms$time <- c(1:20)

   # estimate a quadratic production function
   estResult <- translogEst( "qOutput", c( "qLabor", "land", "qVarInput", "time" ),
      germanFarms )

   estResult
   summary( estResult )

micEcon documentation built on Sept. 4, 2022, 1:06 a.m.