President Barack Obama on Monday will announced he has chosen Princeton University labor economist Alan Krueger to become the top White House economist, a White House official said. Krueger would succeed Austan Goolsbee as chairman of the Council of Economic Advisers. The decision comes as Obama prepares to unveil a jobs package in a speech planned for shortly after the September 5 Labor Day holiday. With U.S. unemployment at a stubbornly high 9.1 percent and amid fears the economy could slide back into recession, Obama is under pressure to show he is doing all he can to bolster growth. Goolsbee,...