From “Fast trains, supply networks, and firm performance” in VoxEU:
We find that sales and measured productivity rose substantially for firms near the new (high speed rail) stations after the opening. Firms in industries with greater purchased input shares outperformed firms in industries with lower purchased input shares.
So Wisconsin dodged the fate of having higher firm productivity.
The report is authored by Bernard, Moxnes, and Saito.
Update, 10/1 12:26PM Pacific: And here is the IMF’s assessment of the role of infrastructure investment. Not that I expect it to convince all the folks who think we should privatize all roads, airports, harbors, and train service…