Under what circumstances can you compare the $ R^2 $ value of two models?
118772
Is R-squared value appropriate for comparing models?
5250
Are $T\mathbb{S}^2$ and $\mathbb{S}^2 \times \mathbb{R}^2$ different?
71767
What is the difference between $\Bbb{R^n}\times\Bbb{R^m}$ and $\Bbb{R^{m+n}}$?
57271
Testing equality of coefficients from two different regressions
135800
Validation of Models with Different Scale Data
105136
relation between $R^2$ of simple regression and multiple regression
151995
Why are effect size estimates (such as $R^2$) difficult in mixed-effects models?
56599
Is $R^2$ useful or dangerous?
73902
summary of lm to compare models instead of ANOVA
49103
How do the Goodman-Kruskal gamma and the Kendall tau or Spearman rho correlations compare?
70415
Comparison between the $\ell_1$ and $\ell_2$ norms
121824
Resolving Conflicting Reports on Fermilab $g-2$ Results
13616
Removal of statistically significant intercept term increases $R^2$ in linear model
92065
Why is F-test not possible for comparing non-nested models
147938
MAPE vs R-squared in regression models
48916
Determing two Nonlinear model fits with 95% confidence bands from one data set
147094
What is the "$R^2$" value given in the summary of a coxph model in R