共 40 条
[1]
ANDREONI J, 1995, AM ECON REV, V85, P891
[2]
[Anonymous], 1994, Designing Social Inquiry: Scientific Inference in Qualitative Research
[3]
[Anonymous], 2012, NATURAL EXPT SOCIAL
[4]
[Anonymous], 1992, J. Publ. Adm. Res. Theor.
[9]
Christensen L.B., 2011, RES METHODS DESIGN A