In the wake of regulatory changes in the U.K. and the U.S., European institutions are embracing alternative investments with a newfound passion that is having a major impact on capital flows into hedge fund firms. In 2006 worldwide assets under management by hedge funds grew a whopping 33 percent, according to Chicago-based Hedge Fund Research, and much of that growth is visible in the firms that make up Alpha‘s 2007 Europe Hedge Fund 50, our fourth ranking of Europe’s biggest single-manager hedge fund firms.