TY  - BOOK
AU  - Clemens, Michael A
AU  - Demombynes Gabriel
AU  - World Bank
TI  - When does rigorous impact evaluation make a difference?: The
PY  - 2010///
CY  - Washington DC
PB  - World Bank
UR  - http://elibrary.igidr.ac.in/e-library/working papers/World Bank/PRWP/2010/E4243.pdf
ER  -