Description Usage Arguments Value Author(s) See Also Examples
Calculate the partial derivatives of a translog ray function
with respect to the independent and the dependent variables.
Please note that translogRayDeriv
does not return
the partial derivatives of the ‘distance’ (||y||)
but of the function F(y,x)= Q( \log x, theta ) - \log ||y|| = 0,
where Q(.) denotes a quadratic function.
1 2 | translogRayDeriv( yNames, xNames, data, coef,
dataLogged = FALSE )
|
yNames |
a single character string or a vector of character strings containing the name(s) of the output quantity. |
xNames |
a vector of strings containing the names of the input quantities. |
data |
dataframe containing the data. |
coef |
vector containing all coefficients:
if there are |
dataLogged |
logical. Are the values in |
A data frame containing the partial derivatives of the function F(y,x) (see above) with respect to x and y.
Arne Henningsen and Geraldine Henningsen
translogRayEst
, translogDeriv
.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | data( germanFarms, package = "micEcon" )
# quantity of crop outputs:
germanFarms$qCrop <- germanFarms$vCrop / germanFarms$pOutput
# quantity of animal outputs:
germanFarms$qAnimal <- germanFarms$vAnimal / germanFarms$pOutput
# quantity of variable inputs
germanFarms$qVarInput <- germanFarms$vVarInput / germanFarms$pVarInput
# estimate a translog ray production function
estResult <- translogRayEst( yNames = c( "qCrop", "qAnimal" ),
xNames = c( "qLabor", "land", "qVarInput" ),
data = germanFarms )
# compute the partial derivatives
deriv <- translogRayDeriv( yNames = c( "qCrop", "qAnimal" ),
xNames = c( "qLabor", "land", "qVarInput" ),
data = germanFarms, coef = coef( estResult ) )
|
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.