Krugman makes three incorrect assumptions about what MMT policy proposals actually are while also demonstrating a lack of understanding of our modern monetary system (as is generally verified by volumes of empirical research on the monetary system by both MMT’ers and non-MMTer’s). These are the following:
Assumption A: The size of the monetary base directly (or indirectly, for that matter) affects inflation if we’re not in a “liquidity trap”
Assumption B: MMT’s preferred fiscal policy approach or strategy—
http://www.epicoalition.org/docs/functional_finance.pdf">Abba Lerner’s functional finance—is Non-Ricardian
Assumption C: Bond markets alone set interest rates on the national debt of a sovereign currency issuer operating under flexible exchange rates
Assumptions A and C are central to the Neo-Liberal macroeconomic model. Assumption B is a common misconception about MMT and a common perception of Neo-Liberals about the nature and macroeconomic effects of fiscal policy (i.e., Neo-Liberals often believe that activist fiscal policy is Non-Ricardian).
While MMT’ers argue that all three assumptions are false, one does not need to necessarily agree. The point is that to critique MMT on the basis of assumptions that are inconsistent with MMT is to actually not critique MMT at all. It is a straw man.
I explain these assumptions and how they relate to Krugman’s two posts as I go through the text of both. Krugman begins:
Right now, deficits don’t matter — a point borne out by all the evidence. But there’s a school of thought — the modern monetary theory people — who say that deficits never matter, as long as you have your own currency. Of course, Krugman grants in his follow-up (below) that MMT’ers don’t say this at all, perhaps due to the many responses to this post pointing out his error, as this is simply a straw man that makes Assumption B—more on this below.
I wish I could agree with that view — and it’s not a fight I especially want, since the clear and present policy danger is from the deficit peacocks of the right. But for the record, it’s just not right.Again, MMT’ers don’t say it is, either.
The key thing to remember is that current conditions — lots of excess capacity in the economy, and a liquidity trap in which short-term government debt carries a roughly zero interest rate — won’t always prevail. As long as those conditions DO prevail, it doesn’t matter how much the Fed increases the monetary base, and it therefore doesn’t matter how much of the deficit is monetized. But this too shall pass, and when it does, things will be very different. Krugman here is using the basic Economics 101 view of a liquidity trap, where interest rates and spending are unresponsive to continued increases in the monetary base. Paul Davidson has explained numerous times that this mainstream conception of a liquidity trap is not at all what Keynes was after, though I won’t go into that specifically here.
The MMT point here, instead, is that changes in the monetary base NEVER matter per se, at least not in terms of causing anything. Recall what the monetary base is—the outstanding quantity of currency (physical “money” held by the households and businesses, or in bank vaults) and reserve balances held by banks in reserve accounts at the Fed.
http://www.nakedcapitalism.com/2011/03/scott-fulwiler-paul-krugman%E2%80%94the-conscience-of-a-neo-liberal.html">more...
Miles and miles of text were written on this subject over the weekend and today. You can follow the links if you are interested. These writers will do a better job of explaining MMT than I can and are also good about answering questions in the comments sections.