quadFuncCalc {micEcon} | R Documentation |
Calculate the dependent variable of a quadratic function.
quadFuncCalc( xNames, data, allCoef, quadHalf = TRUE )
xNames |
a vector of strings containing the names of the independent variables. |
data |
dataframe containing the data. |
allCoef |
vector containing all coefficients. |
quadHalf |
logical. Multiply the quadratic terms by one half? |
a vector containing the endogenous variable.
Arne Henningsen ahenningsen@agric-econ.uni-kiel.de
quadFuncEst
and quadFuncDeriv
.
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$time <- c(1:20) # estimate a quadratic production function estResult <- quadFuncEst( "qOutput", c( "qLabor", "land", "qVarInput", "time" ), germanFarms ) quadFuncCalc( c( "qLabor", "land", "qVarInput", "time" ), germanFarms, estResult$allCoef ) #equal to estResult$fitted