Abstract: A system for keyword valuation is described. An example system includes a communications module, a valuation model selector, and a keyword value calculator. The communications module may be configured to receive a request for a value of a keyword. The valuation model selector may be configured to select a valuation model to be applied for determining the value of the keyword, based on an observed number of clicks associated with the keyword. The keyword value calculator may be configured to calculate the value of the keyword by applying the selected valuation model.

Abstract: A computer-implemented method and system for keyword bidding are disclosed. A particular embodiment includes identifying a keyword searched by a buyer on a host site just prior to their purchase transaction; recording a host site category associated with the purchase transaction; correlating the keyword with the host site category; determining a revenue per click value associated with the keyword; obtaining bidding information associated with the keyword; and automatically generating a bid value for the keyword based on the revenue per click value, the bidding information, and the host site category.