[R-sig-Geo] Question off topic

[Roger Bivand]

On Sat, 15 Feb 2014, Luis Iván Ortiz Valencia wrote:

> Sorry for simple question.
>
> Is it correct to say that a CAR model is a spatial lag model and a SAR
> model is a error spatial model.?

No, it is not. The spatial lag and spatial error models are both SAR - 
simultaneous autoregressive, while CAR is conditional autoregressive and 
is not directly comparable. See books by Ripley (1981) or Haining (2003).

Roger

>
> I revised some literature where these concepts  are not changed.
>
> Ivan
>
> 	[[alternative HTML version deleted]]
>
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-- 
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no