American Airlines plans to end its direct flights from MSP to New York’s LaGuardia and Washington’s Reagan National Airports. The changes are part of a deal with the Justice Department to push through American’s merger with U.S. Airways. American agreed to give up some of its airport slots to lower-cost airlines. So do airline mergers hurt us or help us? According to Myles Shaver, a professor business strategy at the Carlson School of Business, opinions are mixed.