# Hausman–Taylor Estimator for Panel Data

### Description

The Hausman–Taylor estimator is an instrumental variable estimator without external instruments.

### Usage

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### Arguments

`formula` |
a symbolic description for the model to be estimated, |

`object,x` |
an object of class |

`data` |
a |

`subset` |
see |

`na.action` |
see |

`model` |
one of |

`index` |
the indexes, |

`digits` |
digits, |

`width` |
the maximum length of the lines in the print output, |

`...` |
further arguments. |

### Details

`pht`

estimates panels models using the Hausman–Taylor
estimator, Amemiya–MaCurdy estimator, or Breusch–Mizon–Schmidt estimator,
depending on the argument `model`

. The model is specified as a two–part
formula, the second part containing the exogenous variables.

### Value

An object of class `c("pht", "plm", "panelmodel")`

.

A `"pht"`

object contains the same elements as `plm`

, with a
further argument called `varlist`

which describes the typology of
the variables. It has `summary`

and `print.summary`

methods.

### Author(s)

Yves Croissant

### References

Amemiya, T. and MaCurdy, T.E. (1986) Instrumental–variable estimation
of an error components model, *Econometrica*, **54**(4),
pp. 869–880.

Baltagi, Badi H. (2013) *Econometric Analysis of Panel Data*,
5th ed., John Wiley and Sons.

Breusch, T.S., Mizon, G.E. and Schmidt, P. (1989) Efficient estimation
using panel data, *Econometrica*, **57**(3), pp. 695–700.

Hausman, J.A. and Taylor W.E. (1981) Panel data and unobservable
individual effects, *Econometrica*, **49**(6), pp. 1377–1398.

### Examples

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