What motivates regional governments to subsidize firm relocations and what are the implications of the subsidy competition among them? In this paper, I address these questions using a quantitative economic geography model which I calibrate to U.S. states. I show that states have strong incentives to subsidize firm relocations in order to gain at the expense of other states. I also show that subsidy competition creates large distortions so that there is much to gain from a cooperative approach. Overall, I find that manufacturing real income can be up to 3.9 percent higher if states stop competing over firms.