Economists who lean toward the free-market side of the ideological spectrum often say that tax cuts help the US economy by encouraging people to work more. Greg Mankiw, a Harvard economist who earns a very high income from his famous textbooks, has repeatedly claimed that higher taxes will discourage him from working more. The supposed mechanism is simple — …

  Private-equity investors aren’t like you or me. Should there be any doubt, take a look at footwear retailer Belle International Holdings Ltd., which despite a 21 percent share price gain this year has the dubious distinction of being the worst-performing stock on the Hang Seng Index since it joined the benchmark in 2010. Bad Footing Since it joined Hong …

  Amazon.com Inc. doesn’t need any help, but here is some unsolicited advice anyway. The company needs and wants to expand its Prime membership outside the US, and the craftiest tactic to build its shopping club is to throw in free home internet or mobile phone service in Europe. Sound wacky? Stick with us. Prime is essential to Jeff Bezos’s …