plm (version 2.2-0)

pldv: Panel estimators for limited dependent variables

Description

Fixed and random effects estimators for truncated or censored limited dependent variable

Usage

pldv(formula, data, subset, weights, na.action, model = c("fd", "random",
  "pooling"), index = NULL, R = 20, start = NULL, lower = 0,
  upper = +Inf, objfun = c("lsq", "lad"), sample = c("cens",
  "trunc"), ...)

Arguments

formula

a symbolic description for the model to be estimated,

data

a data.frame,

subset

see lm,

weights

see lm,

na.action

see lm,

model

one of "fd", "random" or "pooling",

index

the indexes, see pdata.frame(),

R

the number of points for the gaussian quadrature,

start

a vector of starting values,

lower

the lower bound for the censored/truncated dependent variable,

upper

the upper bound for the censored/truncated dependent variable,

objfun

the objective function for the fixed effect model, one of "lsq" for least squares and "lad" for least absolute deviations,

sample

"cens" for a censored (tobit-like) sample, "trunc" for a truncated sample,

…

further arguments.

Value

An object of class c("plm","panelmodel").

Details

pldv computes two kinds of models : maximum likelihood estimator with an assumed normal distribution for the individual effects and a LSQ/LAD estimator for the first-difference model.

References

HONO:92plm