TY  - JOUR
T1  - Tests of certain types of ignorable nonresponse in surveys subject to item nonresponse or attrition
AU  - Sherman, Robert P.
PY  - 2000
SP  - 362
EP  - 374
JO  - American Journal of Political Science
VL  - 44
IS  - 2
SN  - 0092-5853
UR  - http://www.jstor.org/stable/2669317
ER  -