A new search-engine study has identified Microsoft's Bing as more effective than Google judging by the number of results users actually click on, dpa reported today. The study, by web tracking firm Experian Hitwise found that some 80 per cent of Bing searches led to a visit to one of the web sites identified in the results, compared to just 67 per cent of Google searches. The study said that the relatively high percentage of searches that did not result in a visit to a website indicated that both the leading search engines had significant opportunities to improve their results. The study found that Google's share of the US search market dropped 2 per cent in July to 66.05 per cent as Bing-powered searches increased by 1 per cent to 28.05 per cent. Yahoo, which uses Bing for all searches on Yahoo sites, increased its market share by 4 per cent to 15 per cent, while searches on bing.com itself dropped 2 per cent to 13 per cent.