| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for collecting marketing information. SOLUTION: This system provides a cash reward or article reward or the possibility that a reward like them is provided by being exchanged with a research coupon which is all or partially filled. A motive like this increases consumer's answers to the research coupon. Information obtained from the research coupon is usable to obtain, for example, marketing data or population statistic data. |
