matthew goldstein wrote about it for the paper and he joins us now, welcome, matt. >> good afternoon. >> on the surface it sounds kind of like the perfect solution to aging infrastructure. but there's more to it than that, right? >> yeah. i mean, there are these public/private partnerships around the country. in just the new york area, the gothels bridge is being built with one. there's a limited track record. in the u.s., some have worked and some haven't. it's a mixed bag at this point in time. >> i always thought the point of municipal bonds was for municipalities to raise funds for infrastructure, and especially now with historic low interest rates, it would seem more attractive. is the attraction of public/private partnerships that it speeds up the process? >> that's in part the theory, that you cut out a lot of the red tape because you're outsourcing a lot of it to a private company to oversee it, and they can move quicker on contracting type of situations. but again, it doesn't always work. one of the things my colleague and i, patty cohen, reported on was in kentucky, they're