Natural disaster costs are mushrooming while government coffers shrink. Between 1990 and 2015, the costs for floods, hurricanes and earthquakes have gone up 600%, after accounting for inflation, to some 0 billion. And this year alone, economic losses from Hurricanes Harvey, Irma and Maria could hit 0 billion, plus another billion to pay for the California wildfires. The challenge: Finding ways to have public and private rescue efforts coordinate more closely to put as many resources as possible toward rescue and recovery efforts, say Wharton management professors  Michael Useem and  Tyler Wry , and Luis Ballesteros of The George Washington University. They offer their ideas in this Knowledge at Wharton interview. An edited transcript of the conversation appears below. Knowledge at Wharton: Please explain why the idea of a corporate crowding-out effect could be a worry when it comes to disaster aid. Most people would probably think the more aid, the better, regardless of the source.…