Did the Fed Cause the housing Bubble?

According to research by Ambrogio Cesa-Bianchi and Alessandro Rebucci, the housing bubble was caused by "regulatory rather than monetary-policy failures":

Is the Federal Reserve breeding the next financial crisis?, by Ambrogio Cesa-Bianchi and Alessandro Rebucci: Many economists think that the US Federal Reserve’s loose monetary stance in the 2000s fuelled the US housing bubble. Is the Fed thus responsible for the Global Crisis? This column discusses evidence suggesting that monetary policy was, in fact, not to blame. Rather, it was the absence of an effective regulatory function that created the mess we’re in now. It is not fair to blame the Great Recession only on the Fed’s monetary-policy stance nor is the Fed now breeding the next US financial crisis. ...

In the context of our model and according to this evidence, regulatory rather than monetary-policy failures are largely to blame for the occurrence and the severity of the Great Recession. Only by assuming that the Fed was the sole institutional guardian of financial stability, or at least the main one, is it possible to contend that monetary policy is to blame for the 2007-09 financial crisis and the ensuing Great Recession. ...