Better not call Paul

Paul Samuelson was quite clearly a brilliant man and one of the most influential economists of the twentieth century. His magnum opus, Foundations of Economic Analysis published in 1947, was one of the first rigorous mathematical treatments of important economic concepts. But for all its undoubted brilliance, I have long thought that Samuelson's work was one of the worst things to happen to economics.

This is not to denigrate his work. Samuelson produced some original insight in fields as diverse as consumer theory, welfare economics, public finance and international trade issues. Rather the problem is that he spawned a number of imitators who, captivated by the elegance of his work, attempted to replicate his mathematics rather than his economic insights with the result that academic economics became ever more algebraically rigorous. As Lo and Mueller (2010, here) have pointed out, whilst economics has become much more rigorous and "has led to a number of important breakthroughs ...  ‘physics envy’ has also created a false sense of mathematical precision".

This level of abstraction was part of the reason why the severity of the market crash of 2008 came as such a surprise. As Goldman Sachs' CFO commented in the Financial Times in August 2007 "We are seeing things that were 25-standard deviation moves, several days in a row." Andy Haldane, the Bank of England's chief economist, later pointed out: "Assuming a normal distribution, a 7.26-sigma daily loss would be expected to occur once every 13.7 billion or so years. That is roughly the estimated age of the universe. A 25-sigma event would be expected to occur once every 6x10¹²⁴ lives of the universe. That is quite a lot of human histories." In simple terms, the risk models used at the time were using the wrong statistical distribution to model risk and making firm conclusions based upon it.

It is thus no surprise that attempts have been made to reclaim the centre ground of economics. A recently-published book entitled Econocracy: The Perils of Leaving Economics to the Experts (here), attempts to redress the balance. As the authors note: “Politics and policymaking are conducted in the language of economics and economic logic shapes how political issues are thought about and addressed. The result is that the majority of citizens, who cannot speak this language, are locked out of politics while political decisions are increasingly devolved to experts.”

A letter in the Financial Times (here) recently made a similar point, arguing that "the folly of mainstream economists is their pretence to emulate the natural sciences, presuming to be value free." The author, Yeomin Yoon of Seton Hall University in New Jersey, noted that current practice increasingly deviates from the teachings of Alfred Marshall, who argued: “(1) Use mathematics as a shorthand language, rather than as an engine of inquiry. (2) Keep to them till you have done. (3) Translate into English. (4) Then illustrate by examples that are important in real life. (5) Burn the mathematics. (6) If you can’t succeed in 4, burn 3 … I think you should do all you can to prevent people from using mathematics in cases in which the English language is as short as the mathematical.” Given that Marshall was no mean mathematician himself that is a pretty powerful argument.

Whilst it is easy to be critical of academic economics for creating a level of abstraction that so many people feel unable to relate to, and as a consequence feel able to ignore (as we saw during the Brexit discussions), the future may not be so bleak. Macroeconomics may be operating in an intellectual cul-de-sac (said the macroeconomist) but matters are not helped by the fact that too many people outside the profession expect economists to be able to predict the future with an unreasonable degree of accuracy. Rather than the study of abstract macroeconomic quantities with highly politicised connotations, the roots of economics lie in the study of how people make decisions. As a result, the discipline of microeconomics is thriving. The new and exciting field is behavioural economics where experimentation rather than algebra is used to tease out some of the newest ideas in economic thinking.

Economics is a discipline which has traditionally borrowed ideas from other areas. For a long time, perhaps, it borrowed too much from mathematics and the physical sciences, but by going back to its roots as a social science and borrowing ideas from psychology, the revolution which so many people are calling for may actually already be happening.

Don't make the same mistakes twice

"It is not difficult to indicate the reasons why business last year passed through periods of great anxiety. Under the strain of almost uninterrupted political tension … the state of the world is feverish rather than healthy; and whatever recovery may be seen is anything but steadfast, since it is dependent on the use of stimulants on the one hand and interrupted by grave disturbances on the other. In the face of grim reality in Europe there is decidedly less belief in experimentation with new methods of economic policy.”

This summary of the global conjuncture by the Bank for International Settlements sounds all too familiar. But it was taken from the Annual Report released in May 1939 (here). Indeed, although we should not overdo the parallels with the 1930s, there are a number of worrying economic developments which investors ignore at their peril – and they are not the obvious ones which spring to mind when we talk about the concerns of that particular decade.

It is, however, difficult to overlook the fact that the problems today and in 1939 were triggered by a huge financial crash and compounded by policy errors. Fiscal policy was criticised for being too tight both in the wake of the 1929 crash and again today. In 1931, President Hoover’s State of the Union message noted that “even with increased taxation, the Government will reach the utmost safe limit of its borrowing capacity by the expenditures for which we are already obligated... To go further than these limits ... will destroy confidence.” Today it is European fiscal policy which is accused of not stepping up to the plate. 

Ironically, one of the lessons of the 1930s, derived from the work of economists led by Keynes, was that government had a role to play in the economic cycle by stepping in to make up for any shortfall in aggregate demand. It has always struck me as bizarre that these insights, which prompted Keynes to write The General Theory, should be ignored at a time when the economic cycle shows some similarities with the macroeconomics of the Great Depression. There is also an irony in that both in the 1930s and again today, it is monetary policy which comes in for great criticism. Between 1930 and 1933 the Fed was accused of running an overly restrictive monetary stance. Today, the world’s major central banks are accused of being too lax.

Protectionist sentiment is also rising up the agenda once more. Donald Trump made “promises” on the campaign trail which were nothing short of protectionist (“I would tax China on products coming in … let me tell you what the tax should be … the tax should be 45 percent.”) Of course, this is a response to concerns that US jobs are being “exported” to lower cost economies in much the same way as occurred in the wake of the 1929 crash. Back then, this resulted in the signing into law of the US Tariff Act of 1930 which did a lot of damage to world trade volumes as other countries retaliated against the raising of US import tariffs. It is a sobering thought that in the last four years, the rate of global export growth has posted its slowest multi-year growth rate since the 1930s (see chart).

None of this means that current economic conditions will lead inexorably to the same outcomes as in the 1930s. But we should not ignore the role of fiscal policy in helping to promote recovery – as the OECD noted in the latest edition of its Economic Outlook, released this week. And as the discussions over Brexit continue, some British ministers appear to think that a world of tariffs (albeit low ones) is preferable to belonging to a system without any, so long as they can achieve their own version of economic nationalism. Most economists believe that this will result in a loss of British economic welfare, but just as the likes of US economist Irving Fisher were initially ignored for pointing out the same thing in 1930, so no-one in government appears willing to engage in a rational debate about the costs of Brexit.

Economists of my era were taught that the 1930s were a decade of collective madness and that we had learned the lessons of that benighted period, and would not repeat them again. But history has a habit of making fools of us all. However, we can only hope for rationality to begin to reassert itself before we make even bigger economic mistakes from which it becomes more difficult to recover.

Life at the bottom in the 21st century

It says in The Bible that the poor are always with us. As the fallout from the bursting of the Great Debt Bubble continues to spread, we begin to realise just how many people in western societies are indeed poor. Obviously, we cannot compare poverty levels to those of Victorian Britain: There have been significant improvements in public sanitation, health and education which have lifted millions across the world out of the desperate poverty which prevailed at the end of the nineteenth century. It is treated today as a relative problem: Those earning less than 60% of the national median income are defined as “poor”. It seems, however, that there are a lot of them about.

There has long been a puritan streak in western societies which blames the poor themselves for their lot. You see this in large sections of the British press, which has for many years called for an end to state distributed largesse – a view which has percolated into the mainstream of the Conservative party. You see it in Germany, where the terms imposed on the Greek debt bailout were designed to bring the Greeks to their senses so that they would not fall from the path of fiscal righteousness in future.

Yet it is not always easy to determine where to draw the line between offering self-help and financial support, primarily because people find themselves struggling for different reasons. An alcoholic and a divorcee may face very similar financial problems but very different personal circumstances. Moreover, lack of money is not the only cause of poverty: Social exclusion is a powerful factor reinforcing the downward spiral. How often do we hear tales of people who lose their job and end up living on the street? (Answer: More often than we should in a developed economy).

There are those who argue that UK government policy, which has hacked away at the welfare bill in order to get public finances under control, threatens to exacerbate the UK’s poverty problem. This is not wholly without foundation but also not the whole truth. The Labour government of 1997-2010 did try to reform the welfare system to simultaneously get more people into work whilst providing support for the poorest in society. But by 2013, the UK was spending more on family benefits as a percentage of GDP than any other OECD nation. Moreover, the system was extremely complicated, relying heavily as it did on a series of tax credits and a variety of taper rates with welfare support progressively withdrawn as individuals entered paid employment.

There is general agreement that the system needed reform and the Conservative-Lib Dem coalition government of 2010-15 began the process.  Its centrepiece was a system called Universal Credit which was designed to replace a number of other benefits whilst also being less generous than the previous system. But although it was announced in 2010, it still has not been fully rolled out and as the Institute for Fiscal Studies has pointed out, “changes to its future design have been … apparently at chancellorial whim.” Furthermore, one of the government’s first policy actions in 2010 was to restrict access to Legal Aid – a state supported means of financing access to the legal system to those who would otherwise be unable to afford representation. Combined with rising legal costs, this has contributed to restricting access to the justice system (see here for a summary of the Bach Commission analysis).

A less generous welfare system, coupled with implementation delays and restricted access to the legal system means that voluntary organisations such as Citizen’s Advice have been overwhelmed, with the majority of their cases dealing with debt-related issues. CA reckons that one in every five pounds on disputed debt which they deal with is owed to government (here). Indeed, Council Tax arrears (a local tax) are now the most common source of personal debt. This is partly the result of national reductions in benefit payments but also local council cuts in discounts offered to vulnerable groups and reliefs to low-income residents, which in turn is the result of funding cuts by central government.

Moreover, CA “found evidence of poor practice, including a lack of consideration given to whether people can afford repayments and people forced to pay a debt when it is under dispute.” Whilst government would doubtless argue that the debts they are trying to reclaim (such as Council Tax) are classed as priority debt that can result in serious legal action if not settled, the net result is to push people further into debt. It is hard to avoid the conclusion that the system is creaking at the seams.

It is no wonder that anger is rising amongst the so-called just-about-managing (JAM) households. A policy of getting benefit dependent households back into work, as the government desires, is laudable. But what sorts of jobs are available for them? Globalisation has wiped out the decently paid jobs for low-skilled workers, many of whom feel that work does not pay. At the same time, benefits are being squeezed.

Whilst from a macro perspective the policy is being conducted for the right reasons, it is also leading to a series of unintended consequences. As one case worker said to me, “it’s as if the government does not really understand the magnitude of the problems which the JAMs face.” That being the case, failure to get to grips with the social consequences of fiscal austerity measures could have far more profound political effects than the Brexit decision. And the fact that this problem is being repeated to a greater or lesser degree in many other industrialised countries is a matter of great concern.

More than just the leaves aflutter

In the course of the last week, the new Chancellor Philip Hammond presented his Autumn Statement to parliament. As a general rule, this interim report on the state of UK public finances is only of interest to those of us who have an interest in fiscal policy issues. But this year, there was a lot more interest as it provided us with the first view of how the Office for Budget Responsibility –the fiscal watchdog – assessed the cost of Brexit, and what sort of fiscal response the government was able to provide.

The main takeaways were that the economy will grow more slowly than projected in March, when the exercise was last conducted, and that both public deficits and debt will be higher in the medium-term. Moreover, the government has amended its fiscal rules such that it must no longer achieve a budget surplus in three years’ time, and it will be content with a falling debt-to-GDP ratio over this horizon. The Institute for Fiscal Studies always provides a sober analysis of UK fiscal issues (here) and for a short overview of their take, Director Paul Johnson’s introductory remarks nail most of the issues (here). The only area where I would disagree with the IFS is that the additional capital spending goes nowhere near far enough to tackle the infrastructure spending deficit which has been building for a number of years.

My own forecasts, which you can find in the Treasury’s compendium of economic forecasts (here) have long suggested that official medium-term projections for public finance consolidation have been overly optimistic. For one thing, I have generally come up with slightly slower revenue projections than the OBR but more importantly, I have never been convinced that the government would be able to hold to its eye-wateringly tight spending assumptions. Two years ago, George Osborne’s plans implied that the share of public spending in the economy would fall to its lowest since the 1930s – he quickly dropped that pledge as the 2015 election loomed.

Even though current plans do not appear anywhere near as aggressive, they still imply a considerable amount of fiscal austerity. Whilst spending on the National Health Service is ring-fenced (health is protected from the budgetary cuts which hit other departments) this shifts the burden of spending cuts onto other areas. Moreover, an ageing population is putting strains on the health budget which the current fiscal plans do not address.  So the quality of its service will deteriorate without additional resources.

One of the great ironies of fiscal policy over the past six years has been the extent to which it has hit hardest those at the lower end of the income scale, since policy has focused on cutting the welfare budget which has resulted in major curbs on welfare entitlement. Yet much of the evidence suggests that the poorest households were much more likely to have voted for Brexit than those higher up the income scale. Anger at the squeeze on incomes is derived more from government policy than from the impact of EU migrants pushing down earnings (in much the same way that high immigration was the result of policy failures to curb non-EU migrant numbers, which still account for more than 50% of the total). 

Predictably, of course, pro-Brexit MPs were quick to denigrate the fiscal outline presented this week, particularly since the OBR attributes roughly half the deterioration in public finance forecasts since March to the decision to leave the EU. Iain Duncan Smith, said it was "another utter doom and gloom scenario" by an organisation that “has been wrong in every single forecast they've made so far." The walking cliché that is Jacob Rees-Mogg argued it has made "lunatic" assumptions and added that "experts, soothsayers, astrologers are all in much the same category." Ironically, as the FT pointed out yesterday (here), one of the Chancellor’s measures to provide support to a particular stately home directly benefits the Rees-Mogg family as it is the ancestral home of Jacob’s mother-in-law. So perhaps we could restore a little order to the public finances by removing that “lunatic” gesture?

More generally, I am beginning to find the Brexit brigade rather more than tiresome. Their tactic is to denigrate those who dare question whether Brexit is such a good idea. There will be longer-term economic consequences – we should have little doubt about that. And since when in a democracy has debate about the merit of an idea stopped just because we held a vote on it? As former PM John Major noted recently, the referendum result was a close call and “the tyranny of the majority has never applied in a democracy and it should not apply in this particular democracy.” He should know: Major had to suffer continued sniping from those he called the “cabinet bastards” (his “only excuse is that it was true”)

In my view, a tight fiscal policy helped stir up resentment at the status quo which morphed into the Brexit vote. Boris Johnson’s policy may be to have cake and eat it too, but that is not how economics works in the real world. Get used to it!

Modern macroeconomics: Is it really so bad?

I have to confess that I have long been torn between the intellectual pursuit of academic economics and the uselessness of much of the output. Part of the appeal of economic theory is that it attempts to address problems in a rigorous manner. Of course, that is also its Achilles Heel: the intellectual underpinnings of much that passes for current state of the art thinking are simply bogus. For that reason papers such as the one by Paul Romer, chief economist at the World Bank, entitled ‘The Trouble with Macroeconomics’ (here), always strike a chord. In many ways, this is a subversive read for macro economists and makes a number of serious, but in my view substantiated, allegations regarding the state of economics today.

Romer’s key thesis is that the “identification problem” in economics has essentially taken us round in a circle back to where we started in the 1970s. I hope readers will forgive a little digression at this point so that we can more easily understand the nature of the problem which Romer sets out. The identification problem requires, as Chris Sims noted in a famous 1980 paper, that we must be able to identify “observationally distinct patterns of behaviour” for a given model. This is both a philosophical and empirical argument. Philosophically, it requires us to specify very carefully how our economic system works. In an empirical sense, it means we must construct models in which unique values for each of the model parameters can be derived from other variables in the system. This in turn allows us to clearly identify how economic linkages operate.

As it happens most empirical macro models in use in 1980 were over-identified: It was possible to explain each variable in the model by various different combinations of other variables. Consequently, we were unable to determine precisely how the macroeconomy worked. In his 1980 paper entitled ‘Macroeconomics and Reality’ (a title which, when I first read the paper, seemed to be most inappropriate) Sims noted that such models could only be made to work by applying “incredible” identifying restrictions.

This identification problem is the key to understanding Romer’s critique of much modern macroeconomic theory. In his view, by trying to get away from imposing such “incredible” restrictions, macroeconomists have ended up devising models which themselves are increasingly divorced from reality. Romer starts by taking direct aim at Real Business Cycle (RBC) models which were a direct response to many of the criticisms of the over-identified macro models of the 1970s. He argues that they make a hugely simplifying assumption that cyclical fluctuations in output are solely the result of shocks. The question Romer poses is "what are these imaginary shocks?" Is there really no role for monetary policy, as much of thinking in this field suggests? If that is true, we should all pack up and go home – and the Fed, ECB, BoE et al should abandon attempts to stabilise the economic cycle.

He then aims his blunderbuss at the DSGE models which followed from this, arguing in effect that they are a post-truth way of looking at the world because they rely less on data and more on a series of assumptions about how the world works. (I posted on this topic here). Indeed, such is Romer’s apparent contempt for some of this analysis that he states “the noncommittal relationship with the truth revealed by these methodological evasions [and] dismissal of fact goes so far beyond post-modern irony that it deserves its own label. I suggest ‘post-real’.”

Even worse, in his view, is that many of the proponents of modern macroeconomics have tended to band together and reinforced each other’s views rather than challenging them. This unwillingness to challenge belief systems has, in Romer’s opinion, promoted a stagnant culture which has slowed the advancement of new ideas in economics.

Faced with such a nihilistic view of economics, you may wonder what is the point of it all? I share Romer’s criticisms of many of the ideas which have found their way into the economic mainstream. But I also adhere to the George Box school of thought that whilst all models are wrong, some are useful. There is thus nothing inherently wrong with the idea of going in the direction of RBC or DSGE models – it is just that they have captured the high intellectual ground and have proven difficult to shift. And like it or not, many of the competing theories have not proven up to scratch either.

What is also interesting is that whilst many economists passionately advocate a particular school of thought, few people of my acquaintance argue in public in such terms. So either this debate is a particularly American academic thing or it is confined to those pushing hard to get their material into the journals (and failing). And finally, I have long argued that the financial crisis will act as an efficient way of winnowing out many of the worst ideas in macroeconomics. Just as the Great Depression of the 1930s produced the ideas of Keynes and his acolytes, so the current crisis in the western word may yet lead to a more fruitful approach to many economic issues. So chin up, Mr Romer. The darkest hour comes just before dawn.