Well first thanks for the post. This is clearly more useful than what forum trolls like @telkanuru have to say. I did my research about the program, read a lot online and talked to professors --from the school and from outside who knew more or less the school-- and also alumni from the program. Now that I'm inside however what they told me doesn't look like what I feel. Whatever the reason, that part is already done so I won't really complicate about it. I must say though that you are quite wrong in that interpretation of "it's public policy so it's obviously not going to be rigorous", and as usually happen you may have a misconception about how public policy is done in academia. I still believe it is more rigorous than many Econ programs anyway.
And it's true. I don't know what I want to do anymore. I'll just give my thoughts some time to settle down and anyway I wasn't taking any decision right now. What I do know however is that I want to get a degree out of this, because I want a sort of international career, so I want to stay even if it's only for a master. Hopefully, I'll recover my interest in the field as I go back to doing research and if I don't, then well, there's a back-up.
I'm currently working in a couple projects outside my PhD but they are research projects so not really outside academia. I can't really leave them at the time --nor I want to-- and I'm taking extra courses too, so I don't really have any time available. My original idea was to try to get into academia, but I thought this offer was better than the offers I got from Econ departments so I took it. Also, this gave me the chance to take classes and have advisors in any other department, which is still something I value from this choice.
Well in summary I'll just need time to think about it. Thanks to all of you for your input! I just had one of those bad weeks when you hate everything, but hopefully things will get better. Cheers!