Rho Square and Adjusted Rho Square

[Afia Ibnat Subah]

Hello Professor!

I wanted to know about the rho square value that is showed in the HTML file after running a biogeme model. There are two value namely "Rho-square for the init. model" and " Rho-square-bar for the init. model". Is any of these Adjusted  Rho Square value? Or they are simply the Rho Square of the model?

Thanks in advance!

[Bierlaire Michel]

See Section 7 of the report: https://transp-or.epfl.ch/documents/technicalReports/Bier23.pdf

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Michel Bierlaire
Transport and Mobility Laboratory
School of Architecture, Civil and Environmental Engineering
EPFL - Ecole Polytechnique Fédérale de Lausanne
http://transp-or.epfl.ch
http://people.epfl.ch/michel.bierlaire

[Afia Ibnat Subah]

Thank you for your help!

So from the file, I understand that it is not adjusted R square. Is there any way to get the adjusted R squared value in the HTML file? I am using python package, version biogeme 3.2.10.

[Bierlaire Michel]

Both are reported in the html file. What you call the “adjusted” rho square is labeled the "Rho-square-bar for the null model”
Note that you need to calculate the null loglikelihood to obtain it.
See the examples: https://github.com/michelbierlaire/biogeme/blob/master/examples/swissmetro/b01logit.py

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