TY  - JOUR
T1  - Semi-parametric selection models for potentially non-ignorable attrition in panel studies with refreshment samples
JF  - Political Analysis
Y1  - 2015
A1  - Y. Si
A1  - J.P. Reiter
A1  - D.S. Hillygus
VL  - 23
UR  - http://pan.oxfordjournals.org/cgi/reprint/mpu009?%20ijkey=joX8eSl6gyIlQKP&keytype=ref
ER  -