| 摘要 |
Segment group generating means 502 generates a segment group as a group of users matching all of a plurality of user attribute-based conditions. Sample group generating means 503 generates a sample group, as a group of users matching a prescribed number of user attribute-based conditions among the plurality of user attribute-based conditions, for each of user attributes corresponding to the condition. Effect measurement means 506 calculates a ratio, regarding the effect of user information on the use of information transmitted by information transmitting means 504, for each user attribute based on usage notifications received by usage notification receiving means 505 from communication terminals of the users in the sample groups.
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