Mar 2nd 2018

Economists vs. Scientists on Long-Term Growth

by Kenneth Rogoff

Kenneth Rogoff is Professor of Economics and Public Policy at Harvard University, and was formerly chief economist at the IMF.

CAMBRIDGE – Most economic forecasters have largely shrugged off recent advances in artificial intelligence (for example, the quantum leap demonstrated by DeepMind’s self-learning chess program last December), seeing little impact on longer-term trend growth. Such pessimism is surely one of the reasons why real (inflation-adjusted) interest rates remain extremely low, even if the bellwether US ten-year bond rate has ticked up half a percentage point in the last few months. If supply-side pessimism is appropriate, the recent massive tax and spending packages in the United States will likely do much more to raise inflation than to boost investment.

There are plenty of reasons to object to recent US fiscal policy, even if lowering the corporate-tax rate made sense (albeit not by the amount enacted). Above all, we live in an era of rising inequality and falling income shares for labor relative to capital. Governments need to do more, not less, to redistribute income and wealth.

It is hard to know what US President Donald Trump is thinking when he boasts that his policies will deliver up to 6% growth (unless he is talking about prices, not output!). But if inflationary pressures do indeed materialize, current growth might last significantly longer than forecasters and markets believe.

In any case, the focus of economists’ pessimism is long-term growth. Their stance is underpinned by the belief that advanced economies cannot hope to repeat the dynamism that the US enjoyed from 1995-2005 (and other advanced economies a bit later), much less the salad days of the 1950s and 1960s.

But the doubters ought to consider the fact that many scientists, across many disciplines, see things differently. Young researchers, in particular, believe that advances in basic knowledge are coming as fast as ever, even if practical applications are taking a long time to develop. Indeed, a small but influential cult touts the Hungarian-American mathematician John von Neumann’s “singularity” theory. Someday, thinking machines will become so sophisticated that they will be able to invent other machines without any human intervention, and suddenly technology will advance exponentially.

If so, perhaps we should be far more worried about the ethical and social implications of material growth that is faster than humans can spiritually absorb. The angst over AI mostly focuses on inequality and the future of work. But as science fiction writers have long warned us, the potential threats arising from the birth of silicon-based “life” forms are truly frightening.

It is hard to know who is right: neither economists nor scientists have a great track record when it comes to making long-term predictions. But right now, and leaving aside the possibility of an existential battle between man and machine, it seems quite plausible to expect a significant pickup in productivity growth over the next five years.

Consider that the main components of economic growth are increases in the labor force, increases in investment (both public and private), and “productivity,” namely the output than can be produced with a given amount of inputs, thanks to new ideas. Over the past 10-15 years, all three have been dismally low in the advanced economies.

Labor force growth has slowed sharply, owing to declining birth rates, with immigration failing to compensate even in pre-Trump America. The influx of women into the labor force played a major role in boosting growth in the latter part of the twentieth century. But now that has largely played out, although governments could do more to support female labor force participation and pay equity.

Similarly, global investment has collapsed since the 2008 financial crisis (though not in China), lowering potential growth. And measured productivity growth has declined everywhere, falling roughly by half in the US since the tech boom of the mid-1990s. No wonder global real interest rates are so low, with high post-crisis savings chasing a smaller supply of investment opportunities.

Still, the best bet is that AI and other new technologies will eventually come to have a much larger impact on growth than they have up to now. It is well known that it can take a very long time for businesses to reimagine productive processes to exploit new technologies: railroads and electricity are two leading examples. The pickup in global growth is likely to be a catalyst for change, creating incentives for firms to invest and introduce new technologies, some of which will substitute for labor, offsetting the slowdown in the growth of the workforce.

With the after-effects of the financial crisis fading, and AI perhaps starting to gain traction, trend US output growth can easily stay strong for the next several years (though, of course, a recession is also possible). The likely corresponding rise in real global interest rates will be tricky for central bankers to navigate. In the best case, they will be able to “ride the wave,” as Alan Greenspan famously did in the 1990s, though more inflation is likely this time.

The bottom line is that neither policymakers nor markets should be betting on the slow growth of the past decade carrying over to the next. But that might not be entirely welcome news. If the scientists are right, we may come to regret the growth we get.


Kenneth Rogoff, a former chief economist of the IMF, is Professor of Economics and Public Policy at Harvard University.

Copyright: Project Syndicate, 2018.
www.project-syndicate.org

 


This article is brought to you by Project Syndicate that is a not for profit organization.

Project Syndicate brings original, engaging, and thought-provoking commentaries by esteemed leaders and thinkers from around the world to readers everywhere. By offering incisive perspectives on our changing world from those who are shaping its economics, politics, science, and culture, Project Syndicate has created an unrivalled venue for informed public debate. Please see: www.project-syndicate.org.

Should you want to support Project Syndicate you can do it by using the PayPal icon below. Your donation is paid to Project Syndicate in full after PayPal has deducted its transaction fee. Facts & Arts neither receives information about your donation nor a commission.

 

 

Browse articles by author

More Current Affairs

Jun 19th 2021
EXTRACT: "Xi Jinping’s call for friendship gives us an opportunity to examine Chinese politics on both the domestic and international stage. On the face of it, it suggests the possibility of rapprochement between the rich liberal democracies represented by the G7 and the authoritarian Chinese state. However, despite appearances of a call for a closer relationship, there is more than one way of being friends – and Xi’s idea might be somewhat different to what many in countries attending the G7 might expect."
Jun 12th 2021
EXTRACT: "China’s recently published census, showing that its population has almost stopped growing, brought warnings of severe problems for the country. “Such numbers make grim reading for the party,” reported The Economist. This “could have a disastrous impact on the country,” wrote Huang Wenzheng, a fellow at the Center for China and Globalization in Beijing, in the Financial Times. But a comment posted on China’s Weibo was more insightful. “The declining fertility rate actually reflects the progress in the thinking of Chinese people – women are no longer a fertility tool.” "
Jun 12th 2021
EXTRACT: " I remember recounting fellow leaders of the story of a Rwanda schoolboy caught up in the genocide of the 1990s and now immortalized in the Kigali Genocide Memorial museum, where, in a section devoted to children, one can find his photograph and a plaque that reads: ----- David, age 11 ...... Ambition: to be a doctor ...... Favorite sport: football ...... Favorite hobby: making people laugh ...... Death: by mutilation ...... Last words: the UN are coming to save us ----- In his idealism and innocence, David believed the international community would save him and his mother. We didn’t. "
Jun 8th 2021
EXTRACT: " While many conservative Republicans opposed Trump and saw that he posed a danger to their party and democracy itself, they were hesitant to buck the mass movement they had created, fearing that it would turn against them. Some of these same conservatives assumed that with Trump's defeat, the horror of January 6th, and the former president's banishment from social media, the time had come to restore sanity to their party. But the GOP leadership’s continued cowering in the face of what they now call "Trump's base" has caused them to circle the wagons and purge their ranks of those who call for sanity. "
May 26th 2021
Editor's Note: This article is about the Federal Reserve, inflation in the 1970's, and possible similarities to today.
May 25th 2021
EXTRACT: "Netanyahu claims to be acting in the name of the Jewish people. He certainly is not. Many Jews around the world, including me, despise Netanyahu’s racist politics. As an American, I am also deeply troubled by the US government’s knee-jerk support of Israel. Fortunately, I am not alone in this view. A growing number of Democratic Congressmen, Jews and non-Jews alike, have called on the United States to stop supporting Israel’s lawlessness. The truth is that the US government’s uncritical support for Israel has come to depend more on evangelical Christians, such as former US Secretary of State Michael Pompeo, than on American Jews, who are deeply divided by Netanyahu’s actions. And the evangelicals’ real interest in Zionism is not Jews’ security, but Armageddon, the end of the world, which they believe will come only when all Jews are in Israel."
May 18th 2021
EXTRACT: "This period in US history could go down as the moment when America’s democratic system for electing a president – the most consequential duty of US citizens – was broken, perhaps for good."
May 16th 2021
EXTRACT: "While reading Human Rights Watch’s (HRW) monumental report “A Threshold Crossed,” I felt a range of emotions. It also left me with one big question. I was deeply impressed by the report’s rigorous scholarship. At the same time, it brought to the surface feelings of anger and profound sadness. It’s an extraordinarily complete study detailing not only the many ways Israel has violated a broad range of Palestinian human rights, but the ideology of racial superiority and entitlement that Israel has used to justify its repression." ..... "My advice to both Israel’s defenders and weak-kneed liberals is​, “Read the damn report.” "
May 16th 2021
EXTRACTS: .... "He transformed a transitioning market economy into a stable statist project that rests on an alliance of his inner circle," ..... "He transformed Russia from a respected member of the international community into a rogue state" .... ". He energized NATO by providing it with the adversary it lacked after the end of the cold war," ..... "He befriended hopelessly corrupt, dysfunctional, and unstable dictatorships..." ..... "He forged a quasi-alliance with China, thereby enhancing Russia’s dependence on the one country that might have reason to appropriate those Russian territories inhabited by Chinese."
May 15th 2021
EXTRACT: "On the face of it, the latest escalation of violence is following the template of all inter-ethnic wars. Muslims observing Ramadan shouted nationalist slogans and clashed with Israeli right-wing groups chanting “Death to the Arabs.” The Israelis haughtily marched with their national flag on Jerusalem Day, marking Israel’s capture in 1967 of East Jerusalem and the Temple Mount, the site of the biblical Second Temple, and of Al-Aqsa, completed in the year 705. Battles in and around the Al-Aqsa compound erupted, with worshipers inside throwing stones at the Israeli police, who responded by firing rubber-tipped bullets and other projectiles, wounding hundreds."
May 13th 2021
"Regardless of how the current and future violent conflicts between Israel and the Palestinians in Jerusalem will end, there will be no Israeli-Palestinian peace unless East Jerusalem becomes the capital of a Palestinian state while the city remains united."
May 7th 2021
EXTRACT: " Would the United States be prepared to risk a catastrophic war with the People’s Republic of China to protect the Republic of China, better known as Taiwan? "
May 5th 2021
EXTRACT: "Human history, ancient and contemporary, is replete with instances of genocide – that is, the effort to eradicate a people, erase their history, denigrate their culture, and destroy their physical presence. Many of these atrocities have been recognized by the victims and other nations who support them. But, with the notable exception of the German acknowledgment of the Holocaust, rarely have the perpetrators of these crimes accepted responsibility and offer recompense "
May 2nd 2021
EXTRACT: "The best way to defend liberal democracy is to practice it at home and abroad with the “courage and self-confidence” that Kennan touted at the dawn of the Cold War. This is also the best way to ensure the survival of our own conception of human freedom. And survive it will."
May 1st 2021
EXTRACT: "Ann Arbor (Informed Comment) – Sammy Roth at the LA Times/ Boiling Point Newsletter reports that California’s main power grid was powered for several hours last Saturday by 90% renewables. For just four seconds that day, the grid, which covers 4/5s of the state, reached 94.5% generation by green energy. California is the world’s fifth largest economy. The main grid does not cover Los Angeles County. On the other hand, these figures do not include the electricity generated by the Diablo Canyon nuclear plant, which is not counted as renewable but which is also very low-carbon."
Apr 23rd 2021
EXTRACT: "It is no accident that there has been an economic divergence in Central and Eastern Europe. Those countries that have joined the European Union have improved their economic governance, and GDP has begun to converge with Western Europe. Between 2014 and 2019, Hungary, Poland, and Romania grew at an annual average rate of 3.9%, 4.1%, and 4.7%, respectively. Meanwhile, Belarus and Ukraine experienced minimal growth during this period, and Russia’s economy expanded at an average annual rate of just 0.7%. Though Russia had a higher per capita GDP (in terms of purchasing power parity) than Croatia, Poland, Romania, and Turkey as recently as 2009, all of these countries have since overtaken it. Russians today are shocked to learn that they are worse off than Romanians and Turks. Among EU member states, only Bulgaria is still poorer than Russia. With its close proximity to the EU single market, Russia could have had higher growth if it had pursued sound economic policies. Instead,..... "
Apr 22nd 2021
EXTRACT: "As far as anyone can tell, the US military is not on the verge of an internal breakdown, let alone primed to stage a coup d’état. But few predicted anything like the US Capitol riot before protesters equipped with body armor, stun guns, and zip-ties breached the building. Before the US is blindsided again, its leaders must act resolutely to root out extremism in the military."
Apr 17th 2021
EXTRACT: "The new report on 2020 by the International Renewable Energy Agency reveals that the world’s renewable energy generation capacity increased by an astonishing 10.3% in 2020 despite the global economic slowdown during the coronavirus pandemic." .... "In 2020, the global net increase in renewables was 261 gigawatts (GW). That is the nameplate capacity of some 300 nuclear power plants! There are actually only 440 nuclear power plants in the whole world, with a generation capacity of 390 gigwatts. So let’s just underline this point. The world put in 2/3s as much renewable energy in one year as is produced by all the existing nuclear plants!"
Apr 16th 2021
EXTRACT: "When we examined the development of nations worldwide since 1820, we found that among rich Western countries like the United States, the Netherlands and France, improvements in income, education, safety and health tracked or even outpaced rising gross domestic product for over a century. But in the 1950s, even as economic growth accelerated after World War II, well-being in these countries lagged.
Apr 11th 2021
EXTRACT: "Some presidents indulge in the “Mount Rushmore syndrome” making an obvious effort to achieve greatness. Normally soft-spoken and apparently modest Biden is making his own bid for immortality."