Many readers ask me to provide a Modern Monetary Theory (MMT) rule for sound fiscal management. I had done this often but apparently not concisely enough. It is important to understand what the limits on fiscal deficits are in term of prudent fiscal practice given that terms such as fiscal sustainability, fiscal consolidation, fiscal austerity are in the media almost every day without fail. The mainstream version of fiscal responsibility is based on false premises and is not an applicable guide for sovereign governments to base their policy decisions on. MMT provides a coherent fiscal position for governments to aim for. In this blog, I juxtapose that position with the sort of narrative that is now coming out of the OECD with renewed vigour – after they went a bit quiet once it was clear they were exposed by the magnitude of the economic crisis. But they are back, strutting and arrogant as before and threatening the jobs of millions. So here is the full employment fiscal deficit condition that makes a mockery of the IMF and OECD narratives.