My name is Kaz and I am a data analyst/methodologist in Washington DC area. I use this website for myself.
Some materials may be useful for you. Topics include SAS & R programming, hierarchical linear modeling (HLM), Rasch model analysis, RCT (randomized control trial), PSM (propensity score matching), etc.
I can be reached by email (k u e k a w a AT GMAIL COM).
E*tade account referral link: