Reconciling the Liquidity Trap with MMT
In recent days both Brad DeLong and Paul Krugman have written good pieces arguing against the austerity marketed by deficit hyperventilators. We can thank Thomas Herndon’s muckraking that pushed the topic front and center, showing that there is no empirical evidence in support of the austerian’s claim that big government debts slow growth.
Here’s Krugman’s argument. To briefly summarize, historical experience has demonstrated that the “growth through austerity” argument is false. Further, the monetarists have also got it wrong: monetary policy won’t get us out of this recession trap; what we really need is a good dose of fiscal policy. Given that we are in a “liquidity trap,” we can safely expand government spending without worrying about the usual downside to deficits. And in a liquidity trap, there is really no difference between Modern Money Theory and the conventional ISLM analysis. It is only once we return to a more “normal” situation that budget deficits would “matter” in the sense that they’d cause problems.
DeLong amplifies the argument here. Once we’re out of the liquidity trap, then sustained budget deficits will push up interest rates and crowd out private spending (especially investment). This is basic ISLM stuff. For those who have not taken intermediate macro, it is enough to know that in current conditions increasing budget deficits will not raise interest rates because the private sector welcomes all the liquid and safe government debt it can get. Further, flooding the economy through Quantitative Easing will not cause inflation because, again, everyone wants liquidity and would rather hold it than spend it. In more normal times, budget deficits and money helicopters would cause inflation and rising interest rates. And that would be bad.
Note, both of them raise additional good arguments against the R&R results and against austerity more generally. I am focusing in on the one point about the liquidity trap for the purposes of this blog simply because it seems to be the sticking point that prevents them from fully embracing MMT. From the perspective of Krugman and DeLong, MMT is fine for the liquidity trap, but wrong for the normal situation—when deficits will matter. continue reading…
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