Chicago--Companies looking to cash in on the Internet should look beyond North America, according to a study by USA Chicago, an interactive marketing and communications company. The study, which involved analysis of data from business publications, Internet directories and collegiate research papers, ranked six major world regions according to an index of factors affecting Internet usage. ``North America scored highest in all factors studied, and received the top ranking of any geographic region,'' USA Chicago President Patrick Yanahan Jr. said. ``This is mainly because governments and universities here have historically worked together to promote the Internet. ``But within five to 10 years North America may not have the luxury of being the leader of Internet infrastructures and technology.'' Placing behind North America, in order, were: Western Europe; Asia; Eastern Europe and Russia; South America; and the Middle East and Africa.