Standardization

 The attached study answers three questions: 

1. Does it make a difference whether you standardize your variables before running your regression model or standardize the regression coefficients after you run your model? 
   
2. Does the scale of the respective original non-standardized variables affect the resulting standardized coefficients? 
3. Does using non-standardized variables vs. standardized variables have an impact when conducting regularization? 

The study uncovers the following answers to those three questions:

1. It makes no difference whether you standardize your variables first or instead standardize your regression coefficients afterwards. 
2. The scale of the original non-standardized variables does not make any difference.
3. Using non-standardized variables when conducting regularization (Ridge Regression, LASSO) does not work at all.  In such a situation (regularization) you have to use standardized variables. 

To check out the complete study (very short just 7 slides) go to the following link.  

Standardization study at Slideshare.net