Linear regression including categorical variables with hundreds of levels
3989
Preprocess categorical variables with many values
76906
Penalized methods for categorical data: combining levels in a factor
31175
Interpretation of betas when there are multiple categorical variables
146118
Grouping predictor factor levels based on response variable
2219
How do you deal with "nested" variables in a regression model?
13863
Is it advisable to drop certain levels of a categorical variable?
31220
Finding predictors of upper level of a variable
142074
Solving linear regression with weights and constraints
122557
Can covariates be categorial variables?
75460
How to test the statistical significance for categorical variable in linear regression?
40108
standardising non normally distributed predictors for regression
130037
correlation between categorical variables
38616
Clusering based on categorical variables?
118276
Multivariate multiple regression validation
63048
R : constraining coefficients and error variance over multiple subsample regressions
123566
Recoding a variable with three levels into a dummy variable
30255
Multiple regression with more than 20 predictors