pht {plm} | R Documentation |
The Hausman-Taylor estimator is an instrument variable estimator without external instruments
pht(formula, data, subset, na.action, index = NULL, ...) ## S3 method for class 'pht': summary(object, ...) ## S3 method for class 'summary.pht': print(x, digits = max(3, getOption("digits") - 2), width = getOption("width"), ...)
formula |
a symbolic description for the model to be estimated, |
object,x |
an object of class "plm" , |
data |
a data.frame , |
subset |
see lm , |
na.action |
see lm , |
index |
the indexes, |
digits |
digits, |
width |
the maximum length of the lines in the print output, |
... |
further arguments. |
pht
estimates the Hausman-Taylor estimator. The model
is specified a two-part formula, the second part containing the
exogenous variables.
an object of class c("pht", "plm", "panelmodel")
.
A "pht"
object contains the same element as plm
, with a
further argument called varlist
which describes the typology of
the variables. It has summary
and print.summary
methods.
Yves Croissant
Hausman, J.A. and Taylor W.E. (1981) Panel data and unobservable individual effects, Econometrica, 49, pp.1377–1398.
data("Wages",package="plm") ht <- plm(lwage~wks+south+smsa+married+exp+I(exp^2)+ bluecol+ind+union+sex+black+ed | sex+black+bluecol+south+smsa+ind, data=Wages,model="ht",index=595) summary(ht)