Wanted - One Expert

The director of media relations at my university has asked me to be an “expert” on sports stadium issues for the local and regional press. Oh goody. Last time I did this sort of stuff, a reporter from the local paper (at that time, The Columbia Missourian) asked me about how an event could affect the local economy. Somehow, the Keynesian expenditure multiplier got turned into the Steamroller Effect.

Do you have any words of wisdom for me on being an expert?