Using a variable both as fixed and random effect?
38210
Using the same variable as a fixed and random effect in Mixed Effect Models
130631
Variance between two random points
140393
How to add a regression line to randomly generated points using pgfplots in Tikz?
145044
Why do I get zero variance of a random effect in my mixed model, despite some variation in the data?
41983
What happens when I include a squared variable in my regression?
110212
Assign same value to multiple variables at once?
132863
How do I interpret the results of a regression which involves interaction terms?
50030
Does it make sense to interact 2 dummy variables?
8980
What is meant by a "random variable"?
122659
$R^2$ for mixed models with multiple fixed and random effects
115886
E/Var of a random variable on three events
86384
Generate a dummy-variable
140391
Minimum sample size per cluster in a random effect model
24503
Understanding the variance of random effects in lmer() models
24581
Is adding a time dummy the same as estimating by within-time fixed effects?
74282
Can I use PCA (or should I use regression) for testing the effect of multiple variables on one dependent variable?
49877
Expected value and indicator random variable