Efficient Frontier - leading worldwide provider of paid search engine marketing (SEM) solutions. By combining technology based on Wall Street analytics with expert client services, Efficient Frontier reduces the complexity inherent in SEM and enables customers to realize an average increase in ROI of 20 to 50 percent. With Efficient Frontier, online marketers can maximize the effectiveness of millions of keywords, across search engines, including Google, Yahoo, and MSN based on business objectives and marketing budgets. More than $250 million in annual PPC spend, 70 of the top 500 search advertisers as clients and manages more than 20 million keywords.