Must-reads: March 11, 2016


Must-read: John Holbo: It is difficult to get a man to intuit p-values when his h-index depends upon his not intuiting them

Must-Read: John Holbo: It is difficult to get a man to intuit p-values when his h-index depends upon his not intuiting them: “What p-value < .05 basically comes to…

…1) If this coin is fair, odds are less than 1 in 20 that you could match or beat that 5-heads run I just got!…. Now, to go with, an informal gloss on what your average scientific paper reports/asserts. No such thing as the prestigious science journal Fluke, so when a striking regularity of coin flips presents itself… scientific papers say: 2) Probably this is a trick coin!… Now we can trade in the rather confusing question—‘how does that p-value < .05 thing relate to the substantive take-away we really care about?’— with a less confusing question. What’s the relation between 1 and 2?…

5-heads in a row is evidence your coin is trick, or not, depending on background conditions. It could be weak evidence – so weak as to be none – or actually quite strong. Let’s talk through it. We are immediately inclined to say it’s weak evidence because we assume we are talking about our world, or one like it, in which trick coins are… waaaaaaaaay more unlikely than plain old flipping 5 heads. Ergo a 5-head run is vastly more likely to have been a fluke.

But, obviously, if the world is different things change. Suppose you are running to the bank with your brimming mason jar of quarters, and you collide with Mysterioso the Mysterious, carrying his equally large, equally full jar of trick quarters…. Oh no! The coins are mixed up! What to do? Flipping each 5 times is a decent method….

To review: we’re on the street, coins everywhere, magician swearing, jars rolling. From an even mix of fair and trick coins (per above) you pick a coin (any coin!) and flip – 5-heads. What to conclude? There is a 1 in 32 likelihood that this happened just by (longshot) chance. That is, given 5-heads, there is a 1-in-32 chance that you happen to have picked a fair coin (as likely as the alternative); then (flukily) you flipped 5 heads with it. On the other hand, there is a 31 out of 32 likelihood that… you picked a trick coin….

So if you want to explain to someone why their ‘likelihood that this thing happened just by chance’ intuition about p-values is wrong, flip it and tell them what they are thinking could be right, but only if they just collided with Mysterioso, as it were. So you gotta ask yourself: do you have reason to believe you just collided with Mysterioso? (Well do ya? Punk!?) OK, I promised intuitive….

Informally, a ‘collision with Mysterioso’ case can be glossed as: 1) The alternatives are each equally likely. (Fair coins roughly = trick in number, on the ground.) 2) The alternatives are each pretty likely. (If there are 20 different kinds of differently-behaved trick coins, scattered in equal numbers, flipping one 5 times can’t give you confidence as to which kind you’ve got.) 3) The alternatives are each quite different. (If trick behavior is subtle, 5 flips won’t cut it.) The world does present you, from time to time, with situations you can reasonably believe meet conditions 1-3. In any such case, misusing 1) as a reverse mirror, to say what is true if 2) will not be wildly off. But be aware this is a heuristic way to live the life of the mind. Very sketchy.

Let’s illustrate with a realistic case where 1-3 don’t hold, but people are in fact likely to reason, wrongly, as if they do. I tell you formula XYZ was administered to 5 cancer patients and they all recovered soon after. Would you say formula XYZ sounds likely to be an effective cancer treatment? Many would say yes. But now I add that formula XYZ is water and everyone immediately sees the problem. They were assuming it was independently even-odds XYZ was curative, or not. But it’s obviously not. A cure for cancer is like a trick coin. You don’t find one everyday. They’re 1 in 10 million. But if you are reasoning as if you just collided with Mysterioso, you may trick yourself into thinking maybe you just cured cancer. Intuitive?

Must-read: Draghi Day

Must-Read: FastFT: Draghi Day: “Rabobank describes the wild market moves that followed the European Central Bank rates decision and press conference as ‘carnage’…

…Whether that’s the ECB’s fault or the markets’ depends on who you speak to. Here’s a taste…. Jim Reid at Deutsche Bank sees signs of a strop in the market…. “Imagine you were expecting a trip during school holidays in a caravan around the country but instead you can take 2 weeks off school, fly first class to Disneyworld, have a go in the cockpit on the way, stay at a hotel made of chocolate, and then be able to go on every ride every day without queuing and have a private play session with the real Mickey Mouse as each day draws to a close. However if the market was the same kid its reaction yesterday was ‘do I not get unlimited spending money, and where are we going for our summer holidays then?’”…

Frederik Ducrozet at Pictet says ‘don’t fight the ECB’: “Such a policy package designed to boost bank lending and to improve QE implementation should lead to a significant easing of monetary and financial conditions. We are positive on the net impact….” Peter Schaffrik at RBC: “We do not share the negativity and could well imagine that the initiative to engage in risky assets will find more coverage going forward.”… And the economics team at BNP Paribas….

Now for the critics…. Lutz Karpowitz from Commerzbank says the central bank is ‘firing blanks’. He has issues with TLTRO 2, where the banks can effectively fund their lending at negative rates from the ECB…. Grant Lewis from Daiwa…. “The cost of finance is only one consideration for banks when deciding whether to lend or not – of at least equal importance is how the underlying economy, and hence the loan itself, is expected to perform. And on that measure it’s far from certain that today’s announcements will prove transformative to the economic outlook. Indeed, the ECB’s own forecast for 2017 sees growth of just 1.7% and inflation well below target at just 1.3%.” Rabobank’s Piotr Matys says ECB can forget about talking the euro down: “The damage to bearish bets against the euro, however, has been done. Those market participants, including yours truly, who went into the ECB meeting with a bearish view on the euro ended Thursday’s session calculating their losses instead of celebrating profits… after such a massive blow as on Thursday Draghi and other ECB officials may find it even more difficult, if they choose to do so, to talk the euro down.”

Citi‘s rates team says Draghi’s bazooka has ‘backfired’: “The bazooka backfired because the ECB is taking rate cuts off the table. We expect easing to be priced out. The measures do little to convince us that realised inflation will move higher any time soon.” That said, the same bank’s emerging-markets team says ‘the ECB delivered’: “There is now an incentive to move away from a policy fully centered on negative rates, to a toolset centered on further relief of financing in the banking sector. The markets should be cheering that, rather than reacting in a negative way.”

Must-read: Ben Bernanke: “China’s Trilemma—and a Possible Solution”

Must-Read: The extremely-sharp Ben Bernanke continues to make the argument that the Washington-Consensus Great-Moderation division of labor between technocratic central banks and directly-elected governments–central banks tasked with macroeconomic stabilization, and directly-elected governments focused on rightsizing a public sector funded by an appropriately-prudent debt management system–is simply wrong and inadequate, as we have learned to our great cost. Here he addresses the problem of macroeconomic balancing in China, and says smart things:

Ben Bernanke: China’s Trilemma—and a Possible Solution: “Is the no-devaluation strategy a good one for China?…

…If it is, what does China need to do to make its exchange-rate commitments credible?… China’s ability to avoid a significant devaluation in the medium term will depend on a number of factors, including the country’s other policy choices. China… cannot simultaneously have more than two of the following three: (1) a fixed exchange rate; (2) independent monetary policy; and (3) free international capital flows….

Start with four premises…. 1. China is undergoing a difficult but necessary transition… to [a growth model] that focuses on… services and… consumer demand… accompanied by a slowdown in Chinese GDP growth…. 2. China’s growth appears to have slowed recently by more than the leadership expected or wanted…. 3. To support economic growth… China has eased monetary policy…. 4. At the same time, China has continued a process of reforming and opening up its capital markets. Notably, private Chinese citizens are allowed to invest some of their savings abroad, to a limit of $50,000 per person. Points #3 and #4 are the sources of China’s trilemma…. Chinese households and firms who are able to do so are spurning yuan-denominated investments and looking abroad for higher returns. However, increased private capital outflows also constitute a flight from the yuan toward the dollar and other currencies; that, in turn, puts downward pressure on China’s exchange rate.

In the short run, the PBOC can offset this pressure by selling some of its enormous stocks of dollar-denominated securities and buying yuan…. [But] here is the trilemma in action: If China wants to use monetary policy to manage domestic demand and to simultaneously free up international capital flows, it may not be able to fix the exchange rate at current levels…. One approach would be to devalue now and get it over with. (A series of small devaluations wouldn’t work, as expectations of future devaluations would just accelerate capital outflows.)… [But] a big yuan devaluation would likely be deflationary for the rest of the world… [and] would work against the goal of promoting services over exports. A second possibility… would be to stop or reverse the process of liberalizing capital flows…. This strategy… would sacrifice some of the progress that China has made in opening up its financial system…. Moreover, the horse may be out of the proverbial barn, in that the effectiveness of new capital controls in China would be uncertain…. A third option is to wait and hope…. However, hope is not a plan.

So what to do? An alternative worth exploring is targeted fiscal policy, by which I mean government spending and tax measures aimed specifically at aiding the transition…. Fiscal policies aimed at increasing income security, such as strengthening the pension system, would help to promote consumer confidence and consumer spending. Likewise, tax cuts or credits could be used to enhance households’ disposable income, and government-financed training and relocation programs could help workers transition from slowing to expanding sectors…. Targeted fiscal action has a lot to recommend it, given China’s trilemma. Unlike monetary easing, which works by lowering domestic interest rates, fiscal policy can support aggregate demand and near-term growth without creating an incentive for capital to flow out…

Must-read: John Maynard Keynes (1936): General Theory, chapter 23: “Notes on Mercantilism, the Usury Laws, Stamped Money and Theories of Under-consumption”

Must-Read: John Maynard Keynes (1936): General Theory, chapter 23: “Notes on Mercantilism, the Usury Laws, Stamped Money and Theories of Under-consumption”: “It is impossible to study the notions to which the mercantilists were led by their actual experiences…

…without perceiving that there has been a chronic tendency throughout human history for the propensity to save to be stronger than the inducement to invest. The weakness of the inducement to invest has been at all times the key to the economic problem. To-day the explanation of the weakness of this inducement may chiefly lie in the extent of existing accumulations; whereas, formerly, risks and hazards of all kinds may have played a larger part. But the result is the same. The desire of the individual to augment his personal wealth by abstaining from consumption has usually been stronger than the inducement to the entrepreneur to augment the national wealth by employing labor on the construction of durable assets….

For in an economy subject to money contracts and customs more or less fixed over an appreciable period of time, where the quantity of the domestic circulation and the domestic rate of interest are primarily determined by the balance of payments, as they were in Great Britain before the war, there is no orthodox means open to the authorities for countering unemployment at home except by struggling for an export surplus…. Never in history was there a method devised of such efficacy for setting each country’s advantage at variance with its neighbors’ as the international gold (or, formerly, silver) standard….

It is the policy of an autonomous rate of interest, unimpeded by international preoccupations, and of a national investment programme directed to an optimum level of domestic employment which is twice blessed in the sense that it helps ourselves and our neighbours at the same time. And it is the simultaneous pursuit of these policies by all countries together which is capable of restoring economic health and strength internationally, whether we measure it by the level of domestic employment or by the volume of international trade. The mercantilists perceived the existence of the problem without being able to push their analysis to the point of solving it. But the classical school ignored the problem, as a consequence of introducing into their premisses conditions which involved its non-existence; with the result of creating a cleavage between the conclusions of economic theory and those of common sense. The extraordinary achievement of the classical theory was to overcome the beliefs of the “natural man” and, at the same time, to be wrong….

I remember Bonar Law’s mingled rage and perplexity in face of the economists, because they were denying what was obvious. He was deeply troubled for an explanation. One recurs to the analogy between the sway of the classical school of economic theory and that of certain religions. For it is a far greater exercise of the potency of an idea to exorcise the obvious than to introduce into men’s common notions the recondite and the remote…

Social credit is the answer

Why is it called: “helicopter money”? Why isn’t it called: “expansionary fiscal policy with monetary support to neutralize any potential crowding-out of private-sector spending”?

Why did Milton Friedman set it forth in his writings as one of the paradigmatic cases of expansionary monetary policy? Why did Ben Bernanke refer to it and so gain his unwanted nickname of “Helicopter Ben”?

In Milton Friedman’s case, I believe that it was a conviction that the LM curve was steep enough and the IS curve flat enough that the fiscal side was fundamentally unimportant–that about the same effects were achieved whether the extra money was introduced into the economy via being dropped from helicopters or via open-market operations. To focus on how open-market operations worked would thus confuse listeners who would then have to think through asset market-equilibrium to no substantive gain in understanding. In Friedman’s view, the entire Tobin analytical tradition, not to mention Wicksell, was largely a distracting waste of time. So why go there?

In the case of Ben Bernanke and of the rest of the participants in today’s debate, I think it is has different causes. I think it is a result of the default Washington-Consensus Great-Moderation assignment of the stabilization-policy role to independent and technocratic central banks. In that paradigm, directly-elected governments are supposed to limit their focus to the “classical” tasks of rightsizing the public sector and adopting an appropriately-prudent long-term government-spending financing plan.

To speak of “expansionary fiscal policy with monetary support to neutralize any potential crowding-out of private-sector spending” is to open a can of worms. To speak of “helicopter money” is to convey the impression that this is the central bank undertaking its proper business, but in a context in which as a result of unfortunate historical accidents of institutional development the independent central bank needs the active support of the directly-elected government. The active support of the directly-elected government is needed undertake what is, after all, a fundamentally monetary policy. And it is, in this line of thinking, a fundamentally monetary policy: Milton Friedman himself said so.

Now comes the extremely-sharp Adair Turner to try to focus the debate in a productive direction.

Many today are unwilling to advocate for more expansionary fiscal policy out of:

  1. a fear that many economies that would find their governments engaging in it lack fiscal space for it to be of much use,
  2. a fear that directly-elected governments allowed to cross the line and engage in open-ended explicitly stabilization policy will not give due weight to the objective of keeping inflation low over the long term, or
  3. a fear that central banks allowed to control fiscal-policy levers will be captured by and use their powers to then take taxpayers’ money and spend it enriching the banking sector.

So what is the solution? How can we build institutions that will:

  1. avoid the Scylla of allowing directly-elected governments that use fiscal levers in support of monetary expansion to enforce fiscal dominance and abandon prudent inflation targets, while also

  2. avoiding the Charybdis of allowing central banks that may well have been partially-captured by their banking sectors of using their powers to spend the taxpayers’ money further enriching the bankers?

The solution is obvious: Social Credit. Adopt the policies of the Social Credit Part of Alberta in the 1930s. Adopt the policies of Upton Sinclair’s campaign for Governor of California in the 1930s. Adopt the policies that are taken as a matter of course and are in the background of Robert A. Heinlein’s 1947 novel Beyond This Horizon.

Central banks should, instead of taking all the revenue from seigniorage they create and transferring it all back to the Treasury, calculate each quarter how much of the seigniorage they hold should be distributed to citizens in the form of that quarter’s helicopter drop.

I am not certain about how the legal-institutional constraints bind the BoJ, and ECB, and the BoE. I believe that the Federal Reserve could start such a policy régime today:

  1. Incorporate–for free–everybody with a Social Security number as a bank holding company.
  2. Let everybody then have their personal bank holding company join–again for free–the Federal Reserve system as a member bank.
  3. Offer every such personal bank holding company a permanent long-term open-ended infinite-duration zero-interest line-of-credit to draw on, up to some set maximum nominal amount.
  4. Raise the amount of the line-of-credit maximum every quarter by that quarter’s desired helicopter drop.

The same institutional forces that have, since the selection Paul Volcker, kept the Federal Reserve focused on avoiding an inflationary spiral would still bind. There would be no way to gimmick such a Social Credit system to turn it into a giveaway to the bankers. It would give the Federal Reserve the power to engage in the one policy that nearly all economists are confident will always have traction on nominal demand. Once the Federal Reserve was off and rolling, other central banks would, I think, quickly find mechanisms within their current institutional-legal competence to accomplish the same ends.

And it would, I think, make the FOMC and its members “very popular”, as Marty Feldman playing Igor in the movie Young Frankensteinsays of the monster they are creating.

Adair Turner: Are Central Banks Really Out of Ammunition?: “The global economy faces a chronic problem of deficient nominal demand…

…But the debate about which policies could boost demand remains inadequate, evasive, and confused. In Shanghai, the G-20 foreign ministers committed to use all available tools – structural, monetary, and fiscal – to boost growth rates and prevent deflation. But many of the key players are keener to point out what they can’t do than what they can….

Central banks frequently stress the limits of their powers, and bemoan lack of government progress toward ‘structural reform’…. But while some [SR measures] might increase potential growth over the long term, almost none can make any difference in growth or inflation rates over the next 1-3 years…. Vague references to ‘structural reform’ should ideally be banned, with everyone forced to specify which particular reforms they are talking about and the timetable for any benefits that are achieved…. Central bankers are right to stress the limits of what monetary policy alone can achieve…. Negative interest rates, and… yet more quantitative easing… can make little difference to real economic consumption and investment. Negative interest rates… [may have the] the actual and perverse consequence… [of] higher lending rates….

Nominal demand will rise only if governments deploy fiscal policy to reduce taxes or increase public expenditure – thereby, in Milton Friedman’s phrase, putting new demand directly ‘into the income stream.’ But the world is full of governments that feel unable to do this. Japan’s finance ministry is convinced that it must reduce its large fiscal deficit…. Eurozone rules mean that many member countries are committed to reducing their deficits. British Chancellor of the Exchequer George Osborne is also determined to reduce, not increase, his country’s deficit. The standard official mantra has therefore become that countries that still have ‘fiscal space’ should use it. But there are no grounds for believing the most obvious candidates – such as Germany – will actually do anything….

These impasses have fueled growing fear that we are ‘out of ammunition’…. But if our problem is inadequate nominal demand, there is one policy that will always work. If governments run larger fiscal deficits and finance this not with interest-bearing debt but with central-bank money…. The option of so-called ‘helicopter money’ is therefore increasingly discussed. But the debate about it is riddled with confusions.

It is often claimed that monetizing fiscal deficits would commit central banks to keeping interest rates low forever, an approach that is bound to produce excessive inflation. It is simultaneously argued (sometimes even by the same people) that monetary financing would not stimulate demand because people will fear a future ‘inflation tax.’
Both assertions cannot be true; in reality, neither is. Very small money-financed deficits would produce only a minimal impact on nominal demand: very large ones would produce harmfully high inflation. Somewhere in the middle there is an optimal policy…. The one really important political issue is ignored: whether we can design rules and allocate institutional responsibilities to ensure that monetary financing is used only in an appropriately moderate and disciplined fashion, or whether the temptation to use it to excess will prove irresistible. If political irresponsibility is inevitable, we really are out of ammunition that we can use without blowing ourselves up. But if, as I believe, the discipline problem can be solved, we need to start formulating the right rules and distribution of responsibilities…

Note also that chapter 23, “Notes on Mercantilism, the Usury Laws, Stamped Money and Theories of Under-Consumption”, of John Maynard Keynes’s General Theory of Employment, Interest and Money can be read with great profit here…

Must-reads: March 10, 2016


Must-read: Jan Eberly and Jim Stock: “Spring 2016 BPEA”

Must-Read: Jan Eberly and Jim Stock: Spring 2016 BPEA: “We have arranged the following program…

…Jesse Bricker [et al.]… on ‘Measuring Income and Wealth at the Top Using Administrative and Survey Data’. David M. Byrne [et al.]… on ‘Does the United States have a Productivity Problem or a Measurement Problem?’. Alberto Cavallo [et al.]… on ‘Learning from Potentially Biased Statistics: Household’s Inflation Perceptions and Expectations in Argentina’. Melissa Kearney… and Phillip Levine… on ‘Income Inequality, Social Mobility, and the Decision to Drop Out of High School’. Deborah Lucas… on ‘Credit Policy as Fiscal Policy’. Raven Molloy [et al]… on ‘Understanding Declining Fluidity in the U.S. Labor Market’…

Must-read: Adair Turner: “Are Central Banks Really Out of Ammunition?”

Must-Read: Adair Turner: Are Central Banks Really Out of Ammunition?: “The global economy faces a chronic problem of deficient nominal demand…

…But the debate about which policies could boost demand remains inadequate, evasive, and confused. In Shanghai, the G-20 foreign ministers committed to use all available tools – structural, monetary, and fiscal – to boost growth rates and prevent deflation. But many of the key players are keener to point out what they can’t do than what they can….

Central banks frequently stress the limits of their powers, and bemoan lack of government progress toward ‘structural reform’…. But while some [SR measures] might increase potential growth over the long term, almost none can make any difference in growth or inflation rates over the next 1-3 years…. Vague references to ‘structural reform’ should ideally be banned, with everyone forced to specify which particular reforms they are talking about and the timetable for any benefits that are achieved…. Central bankers are right to stress the limits of what monetary policy alone can achieve…. Negative interest rates, and… yet more quantitative easing… can make little difference to real economic consumption and investment. Negative interest rates… [may have the] the actual and perverse consequence… [of] higher lending rates….

Nominal demand will rise only if governments deploy fiscal policy to reduce taxes or increase public expenditure – thereby, in Milton Friedman’s phrase, putting new demand directly ‘into the income stream.’ But the world is full of governments that feel unable to do this. Japan’s finance ministry is convinced that it must reduce its large fiscal deficit…. Eurozone rules mean that many member countries are committed to reducing their deficits. British Chancellor of the Exchequer George Osborne is also determined to reduce, not increase, his country’s deficit. The standard official mantra has therefore become that countries that still have ‘fiscal space’ should use it. But there are no grounds for believing the most obvious candidates – such as Germany – will actually do anything….

These impasses have fueled growing fear that we are ‘out of ammunition’…. But if our problem is inadequate nominal demand, there is one policy that will always work. If governments run larger fiscal deficits and finance this not with interest-bearing debt but with central-bank money…. The option of so-called ‘helicopter money’ is therefore increasingly discussed. But the debate about it is riddled with confusions.

It is often claimed that monetizing fiscal deficits would commit central banks to keeping interest rates low forever, an approach that is bound to produce excessive inflation. It is simultaneously argued (sometimes even by the same people) that monetary financing would not stimulate demand because people will fear a future ‘inflation tax.’
Both assertions cannot be true; in reality, neither is. Very small money-financed deficits would produce only a minimal impact on nominal demand: very large ones would produce harmfully high inflation. Somewhere in the middle there is an optimal policy…. The one really important political issue is ignored: whether we can design rules and allocate institutional responsibilities to ensure that monetary financing is used only in an appropriately moderate and disciplined fashion, or whether the temptation to use it to excess will prove irresistible. If political irresponsibility is inevitable, we really are out of ammunition that we can use without blowing ourselves up. But if, as I believe, the discipline problem can be solved, we need to start formulating the right rules and distribution of responsibilities…

Must-read: Larry Summers: “A World Stumped by Stubbornly Low Inflation”

Must-Read: Larry Summers: A World Stumped by Stubbornly Low Inflation: “[The 1970s taught us that] allowing not just a temporary increase in inflation but a shift to above-target inflation expectations could be very costly…

…At present we are… in a world that is the mirror image…. Market measures of inflation expectations have been collapsing and on the Fed’s preferred inflation measure are now in the range of 1-1.25 per cent over the next decade. Inflation expectations are even lower in Europe and Japan…. The Fed’s most recent forecasts call for interest rates to rise almost 2 per cent in the next two years, while the market foresees an increase of only about 0.5 per cent. Consensus forecasts are for US growth of only about 1.5 per cent for the six months from last October to March. And the Fed is forecasting a return to its 2 per cent inflation target on the basis of models that are not convincing to most outside observers….

In a world that is one major adverse shock away from a global recession, little if anything directed at spurring demand was agreed. Central bankers communicated a sense that there was relatively little left that they can do to strengthen growth or even to raise inflation. This message was reinforced by the highly negative market reaction to Japan’s move to negative interest rates. No significant announcements regarding non-monetary measures to stimulate growth or a return to target inflation were forthcoming, either…. Today’s risks of embedded low inflation tilting towards deflation and of secular stagnation… will require shifts in policy paradigms if they are to be resolved. In all likelihood the important elements will be a combination of fiscal expansion drawing on the opportunity created by super low rates and, in extremis, further experimentation with unconventional monetary policies.