| pht {plm} | R Documentation |
The Hausman-Taylor estimator is an instrumental 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 |
data |
a |
subset |
see |
na.action |
see |
index |
the indexes, |
digits |
digits, |
width |
the maximum length of the lines in the print output, |
... |
further arguments. |
pht estimates panels models using 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)