TY  - BOOK
AU  - ANGRIST Joshua D
AU  -  PISCHKE Jorn-Steffen
TI  - Mastering metrics:  The path from cause to effect   
T2  - Policy Studies 33
SN  - 9780691152844
U1  - X:(B), Q5 
PY  - 2015///
CY  - Princeton
PB  - Princeton University Press        
KW  - Economics
N1  - Bibliography: p59-64
ER  -