Abstract: This disclosure relates generally to advertising, and more particularly to cooperative offering methods and systems. In one embodiment, a cooperative offer generating system is disclosed, comprising: a processor; and a memory storing processor-executable instructions comprising instructions for: obtaining one or more parameters; identifying an item related to the one or more parameters; determining a plurality of offerors corresponding to the item; obtaining cooperative offer parameters for the offerors; generating a cooperative offer related to the item, including: determining a cooperative offer value, and determining a cooperative offer value share for at least one of the offerors; and providing the generated cooperative offer. In some embodiments, the cooperative offer is an online advertisement bid to advertise the item.