Yahoo today announced that they would be adding ad scheduling and demographic targeting to their search advertising service in March. With ad scheduling Yahoo will support varying bids based on what time of day and day of the week ads will run, which Google and Microsoft already support in their search advertising products. With demographic bidding Yahoo will support varying bids based on age and gender of searchers, which Microsoft already supports. In addition, Yahoo has added the option to show display advertising on the Yahoo Network targeted to users who performed searches on Yahoo for a given keyword.