[R] waldtest and nested models - poolability (parameter stability)

because of the overdispersion - basically without correcting for overdispersion almost every variable is highly significant anova(inv.log.leva.base, inv.log.leva, test = Chisq) Thanks everyone! Best regards, Roberto Patuelli Roberto Patuelli, Ph.D. Istituto Ricerche Economiche

Re: [R] waldtest and nested models - poolability (parameter stability)

Dec 2010, Roberto Patuelli wrote: Dear All, I'm trying to use waldtest to test poolability (parameter stability) between two logistic regressions. Because I need to use robust standard errors (using sandwich), I cannot use anova. anova has no problems running the test, but waldtest does

[R] anova for plm objects

]], objects[[i]], vfun = vcov.) : models are not nested Did anyone code a plm method for anova? OR Does anyone know why according to waldtest my models are not nested? Thanks Roberto Roberto Patuelli, Ph.D. Istituto Ricerche Economiche (IRE) (Institute for Economic Research

[R] Percentage effects in logistic regression

Patuelli Roberto Patuelli, Ph.D. Istituto Ricerche Economiche (IRE) (Institute for Economic Research) Università della Svizzera Italiana (University of Lugano) via Maderno 24, CP 4361 CH-6904 Lugano Switzerland Phone: +41-(0)58-666-4166 Fax: +39-02-700419665

Re: [R] Percentage effects in logistic regression

-- HTH, Daniel - cuncta stricte discussurus - -Ursprüngliche Nachricht- Von: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Im Auftrag von Roberto Patuelli

Re: [R] Percentage effects in logistic regression

- -Ursprüngliche Nachricht- Von: Roberto Patuelli [mailto:roberto.patue...@usi.ch] Gesendet: Monday, November 09, 2009 1:54 PM An: Daniel Malter; r-help@r-project.org Betreff: Re: [R] Percentage effects in logistic regression Dear Daniel, Thanks for your prompt reply. Indeed I was aware

[R] Fitted values and residuals from glmmPQL (MASS package)

columns of fitted values. There's probably something about the way mixed models are treated in R that I'm not catching here... Can someone help me? Thanks and best regards, Roberto Patuelli Roberto Patuelli, Ph.D. Post-doc researcher Institute for Economic Research (IRE

[R] Joint significance of more regressors in summary

set. But the degrees of freedom of the model would in reality be different... Thanks in advance for any help! Cheers Roberto Patuelli Post-doc researcher Institute for Economic Research (IRE) University of Lugano Email: roberto.patue...@lu.unisi.ch Homepage: http://www.people.lu.unisi.ch/patuellr

[R] Marginal effects in negative binomial

to compute them. Thanks in advance for your help. Roberto Patuelli Roberto Patuelli, Ph.D. Post-doc researcher Institute for Economic Research (IRE) University of Lugano (USI) via Maderno 24, CP 4361 CH-6904 Lugano Switzerland Phone: +41-(0)58-666-4166 Email: [EMAIL PROTECTED

[R] Problem with glm.nb estimation

procedure fails at the first step (I know step() is not made for the glm.nb() function, but it usually works just fine for me). Thanks in advance to everyone who might drop his/her two cents on what the problem is. Sincerely, Roberto Roberto Patuelli, Ph.D. Post-doc researcher