If this is true, the 0.01 percent are most likely benefiting from what economists call “skill-biased technological change”—the increasing return on certain skills in an economy driven by technology and globalization. Under this well-established theory, a shortage of in-demand skills raises the value of those skills in rapidly expanding markets, and new technology helps some workers’ productivity grow much more than others’, exacerbating inequality.
In the Information Age, the change has been particularly pronounced. “In business, you can use technology to do things you couldn’t do 30 years ago,” says Steve Kaplan. “You can scale your business using technology, and you can use people in India and China and all over the world—you couldn’t do that as effectively 30 years ago.” This, he argues, has been spectacularly positive for poorer people in developing countries. In 1990, the World Bank estimated that roughly 35 percent of the world lived in extreme poverty. Today, less than 11 percent of the world’s population is so impoverished.
And it has been good for wealthy residents of developed countries. For them, the result has taken the form of the “superstar” or “winner-take-all” phenomenon, first identified in a landmark 1981 paper by the late Sherwin Rosen, who taught at the University of Chicago. “In certain kinds of economic activity there is concentration of output among a few individuals,” wrote Rosen. “Relatively small numbers of people earn enormous amounts of money and dominate the activities in which they engage.”
Technology, from the internet to media such as ESPN and Bloomberg terminals, has given elite athletes, entertainers, entrepreneurs, and financiers the ability to profit on a much larger, global scale, making the fruits of their labor more valuable than what previous superstars, such as, say, Pelé or Babe Ruth, brought in. Ruth’s peak salary of $80,000 would be worth about $1.1 million in 2016 dollars, around one-thirtieth of the $33 million the highest-paid Major League Baseball player, pitcher Clayton Kershaw of the Los Angeles Dodgers, made in salary alone in 2016.
The world’s hundred highest-paid athletes, led by Cristiano Ronaldo and LeBron James, stars of soccer and basketball, respectively, “banked a cumulative $3.11 billion” over the past 12 months, Forbes calculated this past June. Among entertainers, rapper/entrepreneur Diddy and singer Beyoncé each raked in more than $100 million over the same period, Forbes estimated.
And hedge-fund managers make multiples more than top athletes and entertainers. James Simons of Renaissance Technologies and Ray Dalio of Bridgewater Associates each made more than $1 billion in 2016, even though, as Institutional Investor’s Alpha reported, the top-25 hedge-fund earners took in the least as a group since 2005, largely because of the industry’s overall poor investment performance.
“Technology allows a hedge fund to be able to manage $20 billion and invest it,” says Steve Kaplan. “I don’t think people had the systems and information to do that 20 to 30 years ago. Now they have the systems and the information to do that. That technological change is here and is not going away. If anything, it’s getting stronger.”
What should policy makers do (if anything)?
The question of what, if anything, should be done in response to the spectacular rise of the 0.01 percent is a thorny one, as Mankiw acknowledged. “At the outset, it is worth noting that addressing the issue of rising inequality necessarily involves not just economics but a healthy dose of political philosophy,” he wrote.
When policy makers want to address the concentration of income and wealth, the first place some have looked is the top marginal tax rate, which slid in the US and other developed countries after the Reagan and Thatcher revolutions. The US and UK had tax rates as high as 80 percent, wrote Saez and Piketty in the Guardian in 2013. “The job of economists should be to make a top rate tax level of 80 percent at least ‘thinkable’ again.” But on this, Steve Kaplan disagrees. Raising the top marginal rate could send people and their money scurrying for tax havens, he says, pointing to France as an example.
Raising the top tax rates in the US could also send people to take advantage of more favorable tax rules within the code itself. And closing perceived loopholes can be controversial. For example, some people working in finance benefit from the code’s treatment of carried interest, where income flowing to the general partner of an investment fund is typically treated as capital gains and therefore taxed at a lower rate.