Not exactly man bites dog stuff, but the results surprised the researchers anyway...
"Our findings suggest that they [policy makers] should revisit their belief that federal spending can stimulate private economic development. It is important to note that our research ignores all costs associated with paying for the spending such as higher taxes or increased borrowing. From the perspective of the target state, the funds are essentially free, but clearly at the national level someone has to pay for stimulus spending. And in the absence of a positive private-sector response, it seems even more difficult to justify federal spending than otherwise."