quadFuncCalc {micEcon}R Documentation

Calculate dependent variable of a quadratic function

Description

Calculate the dependent variable of a quadratic function.

Usage

   quadFuncCalc( xNames, data, coef, quadHalf = TRUE  )

Arguments

xNames a vector of strings containing the names of the independent variables.
data dataframe containing the data.
coef vector containing all coefficients.
quadHalf logical. Multiply the quadratic terms by one half?

Value

a vector containing the endogenous variable.

Author(s)

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

See Also

quadFuncEst and quadFuncDeriv.

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 <- quadFuncEst( "qOutput", c( "qLabor", "land", "qVarInput", "time" ),
      germanFarms )

   quadFuncCalc( c( "qLabor", "land", "qVarInput", "time" ), germanFarms,
      coef( estResult ) )
   #equal to estResult$fitted

[Package micEcon version 0.5-2 Index]