Bezos now third behind Gates, Ortega
Assesses impact on economy of Britain's vote to leave the European Union.
Lowest level since mid-April.
Percentage at 15-year low.
Wal-Mart leads but process slow.
Investors plowed $15.3 billion into venture-backed start-ups in the second quarter.
Sales are hurting on global markets.
Up 4.8% with surge in Northeast, West.
Cuts will remove $160 million in spending by 2018.
Cleveland study: Population loss slows in past years.