PROBLEM TO BE SOLVED: To determine the necessity for advertisement publication on a sales site of a net agent for each posted commodity to present the result to an accommodation agent, thereby improving an effect of investment for advertisement publication.;SOLUTION: A publication strategy support system 100 is configured to include: a storage unit 101 for holding posted information 125 on a WEB site of a net agent 200 including information on posted commodities and information on at least one of a guest room selling price, a customer evaluation value, and a location area relating to a predetermined accommodation facility and another accommodation facility; and an arithmetic unit 104 that calculates, based on the posted information 125, the number of posted commodities of another accommodation facility for which at least one of a guest room selling price, a customer evaluation value, and a location area in a predetermined period in the future is within a predetermined range from the predetermined accommodation facility, and, when the calculated number of posted commodities is equal to or larger than a predetermined reference, outputs information for admitting the validness of advertisement publication in the predetermined period to a terminal 300 of the predetermined accommodation facility.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2018,JPO&INPIT
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