The New Neoclassical Synthesis of Fiscal Policy

I'm a big known Friedman fan, but one thing that he kind of wrote about in the Amazon Freedom was that this idea that fiscal policy just, almost as the fiscal multiplier was zero or these like balance the wheel sorts of approaches wouldn't have any effect on economic activity. I think there are macro truths that actually change over time, and this makes me nervous. So I think most of all we need to keep an open mind about our current synthesis,. whatever we call it well that's maybe going to change"