TY  - SER
AU  - Knack,Stephen
AU  - Biletska,Nataliya
AU  - Kacker,Kanishka
TI  - Deterring kickbacks and encouraging entry in public procurement markets : : evidence from firm surveys in 90 developing countries
KW  - Contratación
KW  - Corrupción
KW  - Países en desarrollo
ER  -