| 摘要 |
<p>An information providing device (50) includes a first object specifying unit (51) that, by referring to a comparison history database (32) that stores comparison information indicating that a user has made a comparison between a plurality of objects of trading and a reservation record database (33) that stores reservation information indicating an object of trading ordered from a user as a result of a comparison with another object of trading, specifies an object of trading included in the comparison information and not included in the order information corresponding to the comparison information as a first object of trading, a second object extraction unit (52) that, by referring to the above databases (32) and (33), extracts a second object of trading compared with the first object of trading and ordered from a user, a recommendation information generation unit (53) that generates recommendation information based on trading object information of the second object of trading read from a facility database (31) that stores trading object information, and a transmitting unit (54) that presents the recommendation information to an offerer of the first object of trading.</p> |
