Must-Read: Anna Valero and John van Reenen: The Economic Impact of Universities: Evidence from Across the Globe

Must-Read: Anna Valero and John van Reenen: The Economic Impact of Universities: Evidence from Across the Globe:

15,000 universities in about 1,500 regions across 78 countries, some dating back to the 11th Century….

Increases in the number of universities are positively associated with future growth of GDP per capita (and this relationship is robust to controlling for a host of observables, as well as unobserved regional trends). Our estimates imply that doubling the number of universities per capita is associated with 4% higher future GDP per capita. Furthermore, there appear to be positive spillover effects from universities to geographically close neighboring regions…. Part of the effect of universities on growth is mediated through an increased supply of human capital and greater innovation (although the magnitudes are not large). We find that within countries, higher historical university presence is associated with stronger pro-democratic attitudes.

Must-Read: Duncan Black: The Ad Cycle

Must-Read: Duncan Black: The Ad Cycle:

I thought it would’ve reset by now, but the internet just keeps getting worse and worse…

Trying to read a website is like playing a game of whack-a-mole with the ads, and that’s before we start complaining about the auto-on video and audio ads. Usually these things do follow a cycle, with the ad arms race heating up until everybody realizes it isn’t sustainable and it resets a bit, but it seems like endless cover-the-text popover ads are here to stay this time. A mystery to everyone who has ever used the internet is why anybody (meaning the people who pay lots of money for these ads) think that they’ll sell anything by rendering their potential customers’ browsers temporarily unusable, but for some reason they do….

Must-Read: Paul De Grauwe and Yuemei Ji: Animal spirits and the optimal level of the inflation target

Must-Read: Paul De Grauwe and Yuemei Ji: Animal spirits and the optimal level of the inflation target:

Low inflation targets can cause economies to hit the zero lower bound during deflationary periods caused by even mild shocks…

In such circumstances, central banks lose their ability to stimulate the economy. This column assesses the risk of this happening using a model that endogenises self-perpetuating optimism and pessimism in the economy. Given agents’ intrinsic chronic pessimism during times of recession, central banks should raise their inflation targets to 3 or 4% to preserve their ability to stimulate the economy when needed.

Declining U.S. labor mobility is about more than geography

The U.S. labor market often gets praise for being a dynamic place with lots of hiring, job-switching and moving around the country. But the land of the frontier settlers and Horace Greeley is starting to lose some of its luster in this regard. Research over the past several years shows how U.S. workers are far less likely to move across state lines. This trend has correctly led to some concern about its consequences for the U.S. labor market. But are concerns about geographic mobility for the sake of geographic mobility well placed?

A new piece in Democracy by Yale Law School professor David Schleicher looks at how labor mobility, or more specifically geographic labor mobility, is on the decline in the United States as well as at policies that might be able to help workers move more often. Schleicher’s diagnosis of the labor mobility problem is that it is fundamentally a matter of workers being hindered from moving to or leaving certain regions of the United States. In Schleicher’s telling, policies that reduce the “entry limits,” such as reducing the supply of housing in dynamic regions, or that increase “exit limits,” such as public benefits that aren’t portable across state lines, prevent some less economically dynamic regions from “shrinking.” Policies such as these are the culprits behind the decline in geographic mobility, according to Schleicher.

But some research on the topic of labor mobility is skeptical of this diagnosis of increased moving costs. Why? Because geographic mobility on the decline alongside all other kinds of labor market mobility. Research by economists Raven Molloy and Christopher Smith—both of the Federal Reserve Board—and Abigail Wozniak of the University of Notre Dame points to the importance of the labor market in driving geographic mobility down. Their research shows that the gains from making a job switch, regardless of a geographic move, has been declining since the 1980s. In other words, the costs of moving aren’t the main factor. Rather, it’s the decline in the gain. Further research by these three economists and Riccardo Trezzi of the Federal Reserve Board rules finds very little evidence that increased regulation or restriction of housing has played a role in declining labor market fluidity.

This isn’t to say that some of the policies that Schleicher proposes wouldn’t be helpful at the margins when it comes to increasing labor market fluidity or addressing other problems in U.S. economy. But given the root cause of declining geographic mobility, we should be more focused on causes and solutions that focus on the labor market itself. For example, there’s good evidence, for example, that declining labor mobility is a sign of declining labor demand in the U.S. economy, as Mike Konzcal and Marshall Steinbaum at the Roosevelt Institute lay out. Clearly this diagnosis leads to a different understanding of how to boost labor market fluidity. And given the potential consequences of inaction on this issue, it’s important to get the diagnosis right.

Must-Read: William Buiter (2009): The Unfortunate Uselessness of Most ‘State of the Art’ Academic Monetary Economics

Must-Read: William Buiter (2009): The Unfortunate Uselessness of Most ‘State of the Art’ Academic Monetary Economics:

If one were to hold one’s nose and agree to play with the New Classical or New Keynesian complete markets toolkit, it would soon become clear that any potentially policy-relevant model would be highly non-linear….

The interaction of these non-linearities and uncertainty makes for deep conceptual and technical problems. Macroeconomists… took these non-linear stochastic dynamic general equilibrium models into the basement and beat them with a rubber hose until they behaved.  This was achieved by completely stripping the model of its non-linearities and by achieving the transsubstantiation of complex convolutions of random variables and non-linear mappings into well-behaved additive stochastic disturbances. Those of us who have marvelled at the non-linear feedback loops between asset prices in illiquid markets and the funding illiquidity of financial institutions exposed to these asset prices through mark-to-market accounting, margin requirements, calls for additional collateral etc.  will appreciate what is lost by this castration…. Threshold effects, critical mass, tipping points, non-linear accelerators–they are all out of the window.  Those of us who worry about endogenous uncertainty arising from the interactions of boundedly rational market participants cannot but scratch our heads….

When you linearize a model, and shock it with additive random disturbances, an unfortunate by-product is that the resulting linearised model behaves either in a very strongly stabilising fashion or in a relentlessly explosive manner.  There is no ‘bounded instability’ in such models.  The dynamic stochastic general equilibrium (DSGE) crowd saw that the economy had not exploded without bound in the past, and concluded from this that it made sense to rule out, in the linearized model, the explosive solution trajectories.  What they were left with was something that, following an exogenous random disturbance, would return to the deterministic steady state pretty smartly. No L-shaped recessions.  No processes of cumulative causation and bounded but persistent decline or expansion.  Just nice V-shaped recessions….

The practice of removing all non-linearities and most of the interesting aspects of uncertainty from the models that were then let loose on actual numerical policy analysis, was a major step backwards.  I trust it has been relegated to the dustbin of history by now in those central banks that matter…. Charles Goodhart… once said of the Dynamic Stochastic General Equilibrium approach which for a while was the staple of central banks’ internal modelling: “It excludes everything I am interested in”. He was right…. The Bank of England in 2007 faced the onset of the credit crunch with too much Robert Lucas, Michael Woodford and Robert Merton in its intellectual cupboard.  A drastic but chaotic re-education took place and is continuing…

Must-Read: Robert Novy-Marx: Is Momentum Really Momentum?

Must-Read: Robert Novy-Marx: Is Momentum Really Momentum?:

Momentum is primarily driven by firms’ performance 12 to seven months prior to portfolio formation…

…not by a tendency of rising and falling stocks to keep rising and falling. Strategies based on recent past performance generate positive returns but are less profitable than those based on intermediate horizon past performance, especially among the largest, most liquid stocks. These facts are not particular to the momentum observed in the cross section of US equities. Similar results hold for momentum strategies trading international equity indices, commodities, and currencies…

Must-Read: Marc Dordal i Carreras, Olivier Coibion, Yuriy Gorodnichenko, and Johannes Wieland: Rethinking Inflation Targets for Long ZLB Episodes

Must-Read: Marc Dordal i Carreras, Olivier Coibion, Yuriy Gorodnichenko, and Johannes Wieland: Rethinking Inflation Targets for Long ZLB Episodes:

The estimated frequencies and durations are quite sensitive to individual country experiences…

For example, excluding Japan reduces the frequency and duration to 6% and just under three years respectively, lowering the optimal rate of inflation to 2% per year. Excluding the period 1968-1984 when inflation and nominal interest rates were too high for the ZLB to be practically reached, on the other hand, raises the estimated frequency and duration of ZLB episodes to 10% and four and half years respectively, thereby raising the optimal inflation rate to almost 4% per year, the level advocated by economists like Olivier Blanchard and Paul Krugman.

In summary, the specific optimal rate of inflation implied by the model remains very sensitive to one’s beliefs about the frequency and duration of ZLB episodes, values for which history provides only limited guidance. Given the uncertainty associated with measuring historical frequencies and durations of ZLB episodes, the wide range of plausible outcomes that can be reached for the optimal inflation rate implies that profound humility is called for by anyone advocating a specific inflation target.

Must-Reads: September 21, 2016


Should Reads:

Equitable Growth’s inaugural grantee conference

Today Equitable Growth hosts our inaugural grantee conference, with researchers presenting work funded through our competitive grants program. The research being presented covers areas ranging from secular stagnation and debt overhangs to declining income mobility, and from unpredictable work schedules to patents and entrepreneurism.

Equitable Growth’s competitive grants program has funded three rounds of grantees so far. Some of the research projects are already completed, some are in preliminary stages, and others are still in progress. The hope is that our grantees’ research will help not only other researchers better understand the workings of the economy but policymakers as well. The great work that our grantees have and will continue to do can have a great impact within their fields of research, but that impact can be expanded by forging a link between the academy and the policymaking world. There’s already a connection there, but it can be stronger.

Of course, today’s conference is just a start, though it builds on what we’ve been focused on since our launch in 2013. It’s the first time we’ve gathered our grantees together to present research, yet all along we’ve worked to better understand the potential connections between inequality, economic growth, and stability—and convey those findings to policymakers.

Later this fall we’ll release our fourth Request for Proposals and start the process of selecting new research to fund. For anyone interested in helping to increase our knowledge in these areas, be on the lookout over the next few months for more details. We’ll be looking forward to finding our future grantees.