[R-sig-Geo] Spatial partitioning of direct, indirect and total impacts (2)

[Roger Bivand]

On Wed, 6 Aug 2014, Janka VANSCHOENWINKEL wrote:

> Dear list members,
>
> I am sorry that I am going to repeat my question. I do not want to insist,
> but since I sent it right before the weekend, the timing was probably not
> so good and I thought it would be good to give it a second chance.
>
> I am trying to reproduce table 2.1 (p. 41) of LeSage and Pace (2009).
>
> This is a table containing the direct, indirect and total impacts of a SAR
> model (since the regression coefficients cannot be interpreted directly
> because of spillovers), *partitioned by W-order*.
>
> I am able to produce the first part of the table ( impacts() in R ), but
> for the moment I don't have a clue on *how to split these impacts per power
> of W*. I would like to do this both for a SAR and for a SDM model.
>

Please see the Q= argument in ?impacts. Setting Q=# should give # splits 
for the first # powers.

Roger

> Please, could somebody give me a hint on how to do this? I would be very
> grateful!
>
> Thank you very much in advance,
>
> Janka
>
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>
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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 91 00
e-mail: Roger.Bivand at nhh.no