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In observance of the 2024 holiday season, Sage offices will be closed Monday December 23rd through Wednesday January 1st. Normal operations, including shipping for orders placed during the closure, will resume on Thursday January 2nd. For technical support during this time, please visit our technical support page for assistance options. 

We wish you a wonderful holiday season. Thank you. 

Chen Chen Sun Yat-sen University, China

Chen Chen, PhD, is a mathematician, specialized in statistics computing. She is experienced in the clinical research and statistical causal inference methods. She has strong analytical and statistical programming skills in R and SAS. Her research has been focused on statistical causal inference.