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Do you need a work permit? does cialis dissolve in water or soda  The restructuring efforts that Ackman and Lampert have tried to pull off, by contrast, demand a kind of industry- or company-specific knowledge, and experience, that most money managers just don’t have. That’s why the 2008 study found that hedge funds tended to target “issues that are generalizable to all firms … rather than issues that are specific to one” company, and that this was sensible because many hedge funds “are not experts in the specific business of their target firms.” There are, to be sure, a few hedge funds that seem able to effect meaningful improvements in the operations of the companies they target—the best known is Nelson Peltz’s Trian Fund—but they’re rare. In most cases, money managers would do better by sticking to what they know best—finding undervalued companies—and to traditional forms of activism. Even Loeb’s recent success at Yahoo, whose stock has risen sharply over the past year, had more to do with pursuing conventional activist strategies (bringing in a new C.E.O. and pushing for aggressive share buybacks) than with seeking a total revamp of Yahoo’s business.