How and Why to Eliminate the Zero Lower Bound: A Reader’s Guide

Even with links, it has become hard for me to explain in the 140 characters I have on Twitter how an interested reader should approach reading or listening to what I have to say about eliminating the zero lower bound.  This post is meant to meet that need.  I hope to keep it updated when I add relevant new posts.

I have organized all my posts on eliminating the zero lower bound on interest rates into categories; a few fall into more than one category. Within each category, they appear in chronological order, earliest to most recent. (Let me know if I have left out a relevant post.) The last category below is for posts that are in part about some other topic, but that contain a brief appeal for eliminating the zero lower bound and putting negative interest rates in the monetary policy toolkit–brief enough to copy out below.

If you have only 5 minutes, the video of the CEPR interview with me that will catch your eye below is a great place to start. A little further down is a video of my 20-minute talk at Brookings.

If you want academic policy papers, please turn to these three: 

“Negative Interest Rate Policy as Conventional Monetary Policy” has been translated into German. These papers incorporate many (though not all) of the arguments in the other links below. 

Note: some of the most important posts below have been translated into Japanese here, thanks to the efforts of Makoto Shimizu. Makoto has also written a book on negative interest rate policy in Japanese that you can find here.  Suparit Suwanik has begun to translate key posts into Thai.

The Core Argument

Explanations of Negative Interest Rates in Alternative Media

Operational Details for Eliminating the Zero Lower Bound

The graphic above is a translation of the one    here   , graciously provided by Finanz und Wirtschaft through the good offices of Alexander Trentin. Used by permission.

The graphic above is a translation of the one here, graciously provided by Finanz und Wirtschaft through the good offices of Alexander Trentin. Used by permission.

Potential Side Effects

Legal Issues

Comparison of Negative Interest Rates to Other Tools for Stimulating the Economy

News and Trends

Radio and Video Interaction

History of Thought and Economic History

Q&A, Discussion and Rebuttal

Storified Twitter Discussions


Brief Appeals for Eliminating the Zero Lower Bound, Short Enough to Copy Out Here

It is the fear of massive storage of paper currency that prevents the US Federal Reserve and other central banks from cutting short-term rates as far below zero as necessary to bring full recovery. (If electronic dollars, yen, euros and pounds are treated as “the real thing”—the yardsticks for prices and contracts—it is OK for people to continue using paper currency as they do now, as long as the value of paper money relative to electronic money goes down fast enough to keep people from storing large amounts of paper money as a way of circumventing negative interest rates on bank accounts.) As I argued in “Could the UK be the first country to adopt electronic money,” the low interest rates that electronic money allows would stimulate not only business investment and home building, but exports as well—something that would lead to a virtuous domino effect as the adoption of an electronic money standard by one country led to its adoption by others to avoid trade deficits. If I were writing that column now, I would be asking if Japan could be the first country to adopt electronic money, since Japan’s new prime minister Shinzo Abe is calling for a new direction in monetary policy. For the Euro zone, I argue in “How the electronic deutsche mark can save Europe” that electronic money is not only the way to achieve full recovery, but the solution to its debt crisis as well….

Franklin Roosevelt famously said:

“The country needs and, unless I mistake its temper, the country demands bold, persistent experimentation. It is common sense to take a method and try it: If it fails, admit it frankly and try another. But above all, try something.”

We are at such a moment again. The usual remedies have failed. It is time to try something new.

… it is an even more important mistake to think that monetary policy can’t cut short-term interest rates below zero. Weisenthal quotes a post on Barnejek’s blog, “Has Britain Finally Cornered Itself?” that illustrates the faulty thinking I’m talking about:

“Before I start, however, I would like to thank the British government for conducting a massive social experiment, which will be used in decades to come as a proof that a tight fiscal/loose monetary policy mix does not work in an environment of a liquidity trap. We sort of knew that from the theory anyway but now we have plenty of data to base that on.”

“Liquidity trap” is code for the inability of the Bank of England to lower interest rates below zero. The faulty thinking is to treat the “liquidity trap” or the “Zero Lower Bound,” as modern macroeconomists are more likely to call it, as if it were a law of nature. _The Zero Lower Bound is not a law of nature! _It is a consequence of treating money in bank accounts and paper currency as interchangeable. As I explain in a series of Quartz columns (1, 2, 3 and 4) and posts on my blog—that is a matter of economic policy and law that can easily be changed. As soon as paper pounds are treated as different creatures from electronic pounds in bank accounts, it is easy to keep paper pounds from interfering with the conduct of monetary policy. In times when the Bank of England needs to lower short-term interest rates below zero, the effective rate of return on paper pounds can be kept below zero by announcing a crawling peg “exchange rate” between paper pounds and electronic pounds that has the paper pounds gradually depreciating relative to electronic pounds.

In his advice for the UK, Weisenthal should either explain why having an exchange rate between paper pounds and pounds in bank accounts is worse than a massive explosion of debt or join me in tilting against a windmill less tilted against. And for those who read Krugman’s columns, it would take a bad memory indeed not to recall that he gives the corresponding advice of stimulus by additional government spending for the US, which faces its own debt problem. I hope Paul Krugman will join me too in attacking the Zero Lower Bound.

In 1896 William Jennings Bryan famously declared:

“… you shall not crucify mankind on a cross of gold.”

In our time it is not gold that is crucifying the world economy (though some would return us to the problems that were caused by the gold standard), but the unthinking worldwide policy of treating paper currency as interchangeable with money in bank accounts. So for our era, let us say: You shall not crucify humankind on a paper cross.

Although there are a few other economists who might match Bernanke in their monetary policy judgments, through his years at the helm of the Fed, Bernanke has developed an unparalleled skill in explaining and defending controversial monetary policy measures to Congress and to the public. The most important ways in which US monetary policy has fallen short in the last few years are because of the limits Congress has implicitly and explicitly placed on the Fed. Negative interest rates could be much more powerful than quantitative easing, but require a legal differentiation between paper currency and electronic money in bank accounts to avoid massive currency storage that would short-circuit the intended stimulus to the economy.

For the US, the most important point is that using monetary policy to stimulate the economy does not add to the national debt and that even when interest rates are near zero, the full effectiveness of monetary policy can be restored if we are willing to make a legal distinction between paper currency and electronic money in bank accounts—treating electronic money as the real thing, and putting paper currency in a subordinate role. (See my columns, “How paper currency is holding the US recovery back” and “What the heck is happening to the US economy? How to get the recovery back on track.”) As things are now, Ben Bernanke is all too familiar with the limitation on monetary policy that comes from treating paper currency as equivalent to electronic money in bank accounts. He said in his Sept. 13, 2012 press conference:

“If the fiscal cliff isn’t addressed, as I’ve said, I don’t think our tools are strong enough to offset the effects of a major fiscal shock, so we’d have to think about what to do in that contingency.”

Without the limitations on monetary policy that come from our current paper currency policy, the Fed could lower interest rates enough (even into negative territory for a few quarters if necessary) to offset the effects of even major tax increases and government spending cuts.

…the tools currently at the Fed’s disposal plus clearly communicating a nominal GDP target are not enough to get the desired result. The argument goes as follows. Interest rates are the price of getting stuff—goods and services—now instead of later. If people are out of work, we want customers to buy stuff now by having low interest rates. Thinking about short-term interest rates like the usual federal funds rate target that the Fed uses, the timing of the low interest rates matters. If everyone knows we are going to have low short-term interest rates in 2016, then it encourages buying in the whole period between now and 2016 in preference to buying after 2016. But to get the economy out of the dumps, we really want people to buy right now, not spread out their purchases over 2013, 2014, and 2015. The lower we can push short-term interest rates, the more we can focus the extra spending on 2013, so that we can have full recovery by 2014, without overshooting and having _too much _spending in 2015. This is an issue that economist and New York Times columnist Paul Krugman alludes to recently in a column about Japanese monetary policy.

There is only one problem with pushing the short-term interest rate down far enough to focus extra spending right now when we need it most: the way we handle paper currency. The Fed doesn’t dare try to lower the interest rate it targets below zero for fear of causing people to store massive amounts of currency (which _effectively _earns a zero interest rate). Indeed, most economists, like the Fed, are so convinced that massive currency storage would block the interest rate from going more than a hair below zero that they talk regularly about a zero lower bound on interest rates. The solution is to treat paper currency as a different creature than electronic money in bank accounts, as I discuss in many other columns. (“What Paul Krugman got wrong about Italy’s economy” gives links to other columns on electronic money as well.) If instead of being on a par with electronic money in bank accounts, paper currency is allowed to depreciate in value when necessary, the Fed can lower the short-term interest as far as needed, even if that means it has to push the short-term interest rate below zero

Keeping the Economy on Target

In the current economic doldrums, breaking through the zero lower bound with electronic money is the first step in ensuring that monetary policy can quickly get output back to its natural level. A better paper currency policy puts the ability to lower the Fed’s target interest rate back in the toolkit. That makes it possible for the Fed to get the timing of extra spending by firms and households right to meet a nominal GDP target—hopefully one that has been appropriately adjusted for the rate of technological progress.

The reason I wrote this post is because many people don’t seem to understand that low levels of output lower the net rental rate and therefore lower the short-run natural interest rate. Leaving aside other shocks to the economy, monetary policy will not tend to increase output above its current level unless the interest rate is set below the short-run natural interest rate. That means that the deeper the recession an economy is in, the lower a central bank needs to push interest rates in order to stimulate the economy….

If a country makes the mistake of having a paper currency policy that prevents it from lowering the nominal interest rate below zero, then the MP curve has to flatten out somewhere to the left. (The zero lower bound on the nominal interest rate puts a bound of minus expected inflation on the real interest rate. That makes the floor on the real interest rate higher the lower inflation is.) The lower bound on the MP curve might then make it hard to get the interest rate below the net rental rate (a.k.a. the short-run natural interest rate). In my view, this is what causes depressions. QE can help, but is much less powerful than simply changing the paper currency policy so that the nominal interest rate can be lowered below the short-run natural interest rate, however low the recession has pushed that short-run natural interest rate.

The questions I would like to ask Larry Summers and Janet Yellen are many, but let’s focus on three big ones:

  1. Eliminating the “Zero Lower Bound” on Interest Rates. Given all of the problems that a floor of zero on short-term interest rates causes for monetary policy, what do you think of going to negative short-term interest rates, as I have argued for here and here and here? If we repealed the “zero lower bound” that prevents interest rates from going below zero, there would be no need to rely on the large scale purchases of long-term government debt that are a mainstay of “quantitative easing,” the quasi-promises of zero interest rates for years and years that go by the name of “forward guidance,” or inflation to make those zero rates more potent. Repealing the “zero lower bound” would require dramatic changes in monetary policy (and in particular, a dramatic change in the way we handle paper currency), but wouldn’t that be worth it?

… the Fed’s approach of talk therapy is problematic because it is hard to communicate a monetary policy that is strongly stimulative now but will be less stimulative in the future. As I discussed in a previous column and in the presentation I have been giving to central banks around the world, adjusting short-term interest rates has an almost unique ability to get the timing of monetary policy right. Unfortunately, the US government’s unlimited guarantee that people can earn at least a zero interest rate by holding massive quantities of paper currency stands in the way of simply lowering short-term interest rates….

My own recommendations for the Fed are no secret:





The solution to the dilemma of a Fed doing less than it thinks should be done because it is afraid of the tools it has left when short-term interest rates are zero? Give the Fed more tools. Unfortunately, it takes time to craft new tools for the Fed, but that is all the more reason to get started. (Sadly, even if all goes well in the next few years, this isn’t the last economic crisis we will ever have.) As I have written about herehere, and here, three careful and deliberate steps by the US government would make it possible for the Fed to cut interest rates as far below zero as necessary to keep the economy on course:

  1. facilitate the development of new and better means of electronic payment and enhance the legal status of electronic money,

  2. trim back the legal status of paper currency, and

  3. give the Federal Reserve the authority to charge banks for storing money at the Fed and for depositing paper currency with the Fed.

If the Fed could cut interest rates below zero, it wouldn’t need QE, it wouldn’t need forward guidance, and it wouldn’t wind up begging Congress and the president to run budget deficits to stimulate the economy. And because the Fed understands interest rates—whether positive or negative—much, much better than it understands either QE or forward guidance, the Fed would finally know what it was doing again.

Automatic enrollment in retirement savings plans is so powerful that some economists will worry that its spread will help exacerbate a global glut of saving. But if paper currency policy gets out of the way of the appropriate interest rate adjustments, financial markets will find the appropriate equilibrium. They will balance the supply and demand for saving, and companies will realize the extent to which an abundance of saving makes available the funds they need to dream big by creating new markets and technologies that the future of America depends on.

Monetary policy does not act instantaneously. Even with excellent monetary policy, the economy may be away from the natural level for 9 to 15 months after an unexpected shock, simply do to the lags in the effects of monetary policy. But there is forewarning for many shocks, and shocks that act through the financial system are likely to have the same lags in their effects as monetary policy, so vigorous enough monetary countermeasures should be able to limit damage to a few month's time after a financial shock that does not diminish the long-run capacity of the economy. A key point though, is that "vigorous enough" may mean using negative interest rates for a brief period of time until the economy is put to rights and positive interest rates can be restored. On this, see my post "On the Great Recession."  ...

... a track of prices that is too low is something that should be corrected just as quickly as a track of prices that is too high. If you don't think so, you probably have too high a long-run inflation target, as I discuss in "The Costs and Benefits of Repealing the Zero Lower Bound...and Then Lowering the Long-Run Inflation Target." With a zero inflation target, the idea that prices going off track in the downward direction is just as serious as prices going off track in the upward direction is easier to feel at a gut level. 

When people save more, the whole economy benefits. A higher saving rate has the potential to reduce the trade deficit without protectionism. If accompanied by appropriate monetary policy, and not canceled out by bigger government budget deficits, a higher saving rate would also make more funds available for research and development. It should raise wages and reduce inequality.