共 16 条
[11]
MADANSKY A, 1980, J BUSINESS JUL
[12]
McFadden D, 1974, FRONTIERS ECONOMETRI, P105
[13]
MITCHELL R, 1988, IN PRESS USING SURVE
[14]
RANDALL A, 1981, DEC AM EC ASS M
[15]
RAO DA, 1986, BENEFITS VISUAL AIR
[16]
RAO DA, 1986, BENEFITS COSTS IMPRO