共 12 条
[3]
CADY JF, 1976, STATEMENT FEDERAL TR
[4]
EFFECTS OF ADVERTISING LESSONS FROM OPTOMETRY
[J].
JOURNAL OF HUMAN RESOURCES,
1978, 13
:247-262
[5]
*FTC, 1976, ADV OPHTH GOODS SERV
[6]
Johnston J., 1972, ECONOMETRIC METHODS, V2nd edn
[7]
Maddala GS., 1977, ECONOMETRICS
[9]
MAURIZI A, 1978, PRICES CONSUMER INFO
[10]
MAURIZI AR, 1972, WESTERN ECON J, V10, P321