TY  - RPRT
TI  - Using group mean centering for computing adjusted means by site in a randomized experimental design. The case of California's Work Pays Demonstration Project.
AU  - A C Lewin
AU  - M N Mitchell
PY  - 1999
DO  - 10.1177/0193841x9902300202
UR  - https://pubmed.ncbi.nlm.nih.gov/10350950/
ID  - 10350950
ER  -