TY  - BOOK
AU  - Li, Qi  .
TI  - Nonparametric econometrics: theory and practice / 
SN  - 0-691-12161-3
U1  - X 
PY  - 2007///
CY  - New Jersey : 
PB  - Princeton University Press , 
KW  - Nonparametric statistics
ER  -