AUCTION SERVER, AUCTION CONTROL METHOD, NON-TRANSITORY RECORDING MEDIUM, AND PROGRAM
A system intermittently lowers a set price at which a product is winnable at an auction, provides the set price of the product to a plurality of users, manages active users indicating an interest in the product from among the users provided with the set price, and receives a bid at the set price from a bidding user. If the time of the received bid is within a predetermined announcement period, an email transmitter announces, to active users excluding the bidding user, counter-bidding at the set price before the relevant price lowering. The system receives a counter-bid from a counter-bidding user among the active users to which counter-bidding was announced, until a counter-bidding deadline determined from the price lowering time or the bid time, and decides a winning user on the basis of the bid and the counter-bid received.
1 . An auction server comprising:
an updater that intermittently lowers a set price at which a product put up for auction is winnable;
a provider that provides the current set price of the product to a plurality of users;
a manager that manages one or more active users indicating an interest in the product from among the plurality of users provided with the set price;
a bid receiver that receives a bid at the current set price for the product from a bidding user among the plurality of users;
an announcer that, if a bid time at which the bid is received by the bid receiver is within a predetermined announcement period starting from a time of a price lowering of the product by the updater, announces, to the active users excluding the bidding user, counter-bidding at the set price for the product prior to the relevant price lowering;
a counter-bid receiver that receives a counter-bid from a counter-bidding user among the active users to which counter-bidding was announced, until a counter-bidding deadline determined from the price lowering time or the bid time; and
a decider that decides a winning user on the basis of the bid received by the bid receiver and the counter-bid received by the counter-bid receiver.
2 . The auction server according to claim 1 , wherein
the announcer varies the announcement period according to the number of active users.
3 . The auction server according to claim 1 , wherein
the announcer varies the announcement period according to a price lowering amount or a price lowering ratio used by the updater.
4 . The auction server according to claim 1 , wherein
the counter-bidding deadline is equal to the end of the announcement period, or after a fixed period elapses from the bid time.
5 . The auction server according to claim 1 , further comprising:
a granter that, on the condition that the decider decides that the counter-bidding user is the winning user, grants some or all of points to be granted to the winning user for use when paying for a product won by auction to the bidding user.
6 . An auction control method in a server that controls an auction, comprising:
an updating step that intermittently lowers a set price at which a product put up for auction is winnable;
a providing step that provides the current set price of the product to a plurality of users;
a managing step that manages one or more active users indicating an interest in the product from among the plurality of users provided with the set price;
a bid receiving step that receives a bid at the current set price for the product from a bidding user among the plurality of users;
an announcing step that, if a bid time at which the bid is received in the bid receiving step is within a predetermined announcement period starting from a time of a price lowering of the product in the updating step, announces, to the active users excluding the bidding user, counter-bidding at the set price for the product prior to the relevant price lowering;
a counter-bid receiving step that receives a counter-bid from a counter-bidding user among the active users to which counter-bidding was announced, until a counter-bidding deadline determined from the price lowering time or the bid time; and
a deciding step that decides a winning user on the basis of the bid received in the bid receiving step and the counter-bid received in the counter-bid receiving step.
7 . A non-transitory computer-readable recording medium storing a program causing a computer to function as:
an updater that intermittently lowers a set price at which a product put up for auction is winnable;
a provider that provides the current set price of the product to a plurality of users;
a manager that manages one or more active users indicating an interest in the product from among the plurality of users provided with the set price;
a bid receiver that receives a bid at the current set price for the product from a bidding user among the plurality of users;
an announcer that, if a bid time at which the bid is received by the bid receiver is within a predetermined announcement period starting from a time of a price lowering of the product by the updater, announces, to the active users excluding the bidding user, counter-bidding at the set price for the product prior to the relevant price lowering;
a counter-bid receiver that receives a counter-bid from a counter-bidding user among the active users to which counter-bidding was announced, until a counter-bidding deadline determined from the price lowering time or the bid time; and
a decider that decides a winning user on the basis of the bid received by the bid receiver and the counter-bid received by the counter-bid receiver.
8 . (canceled)