Henrico County (VA) has announced it is going to build a large complex north of the City or Richmond that will include an arena large enough to host NCAA tournament games, etc. County officials happily asserted that the construction project itself would create hundreds of new jobs and further that the operation of the arena thereafter would constitute a major economic plus for Henrico County. (a) Under what circumstances will this project create new jobs and for whom? (b) Under what circumstances will its operation turn out to be a positive for Henrico County?