I am using "Ordinal Logistic Regression" for my dissertation research. I wanted to report the effect size but couldn't find definitive reference for reporting an effect size.

I have found some papers stating that "Nagelkere's R square" is the effect size measure. Another states "odds ratio". Interestingly, I found other papers saying there is no effect size for logistic regression in general (ordinal, multinomial, etc)[1,2].

So, what is the effect size measure for "Ordinal Logistic Regression" and what is your reference? (yes, please cite the paper)

Thank you in advance for any help.

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[1] Menard, S. (2000). Coefficients of determination for multiple logistic regression analysis

[2] Peng CYJ et al. (2002). An introduction to logistic regression analysis and reporting