Regression with categorical predictors - use only some dummy variables
13863
Is it advisable to drop certain levels of a categorical variable?
118753
Is feature selection with dummy coding of categorical variables problematic?
42483
Logistic regression with {-1,+1} labels
68045
Explicit solution for linear regression with two predictors
146118
Grouping predictor factor levels based on response variable
710
Importance of predictors in multiple regression: Partial $R^2$ vs. standardized coefficients
27203
Omitted dummy variable coefficient in OLS
118333
Predictor transformation in logistic regression
59668
Regression coefficients that flip sign after including other predictors
107106
Interpreting coefficient in a linear regression model with categorical variables
49410
How to handle ordinal categorical variable as independent variable
30255
Multiple regression with more than 20 predictors
52242
Interpreting coefficients of an interaction between categorical and continuous variable
89583
Transforming variables for multiple regression in R
65293
Dealing with Categorical variables in Multiple Regression
9757
Logistic regression with binary dependent and independent variables
147997
Interpreting Intercept when doing logistic regression with categorical data in R