共 39 条
[31]
Nunnally J.C, 1994, Psychometric theory, V3, P248
[35]
SKINNER SJ, 1992, J RETAILING, V68, P174
[38]
WILLIAMSON OE, 1988, J LAW ECON, V31, P65
[39]
*WORLD BANK, 1995, WORLD TABL