[R] Ordered probit model -marginal effects and relative importance of each predictor-

[Mark Difford]

On Aug 27, 2011 franco salerno wrote:

> ...problem with ordered probit model -polr function (library MASS).
> a) how to calculate marginal effects
> b) how to calculate the relative importance of each independent variables

Hi Franco,

Have a look at John Fox's effects package (for a), and the Anova() function
in his car package (for b).

Regards, Mark.

-----
Mark Difford (Ph.D.)
Research Associate
Botany Department
Nelson Mandela Metropolitan University
Port Elizabeth, South Africa
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