The Saving Glut of the Rich and the Rise in Household Debt
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The “saving glut of the rich” in the US has mirrored the global saving glut but without a corresponding rise in investment, linked to “dis-saving” of the bottom 90%.
Atif Mian, Ludwig Straub and Amir Sufi, "The Saving Glut of the Rich and the Rise in Household Debt," Harvard University, November 2019, https://scholar.harvard.edu/files/straub/files/mss_richsavingglut.pdf
"....Rising income inequality since 1980 in the United States has generated a large increase in saving by the top of the income distribution, which we call the saving glut of the rich. The saving glut of the rich has been on the same order of magnitude as the global saving glut, and it has not been associated with an increase in investment.An examination of thedistribution of income and wealth reveals that a large fraction of the rise in household borrowing by non-rich households has been financed by rich households through this saving glut...From a national accounting perspective, the saving glut of the rich must have been absorbed by some other part of the economy...investment actually declined from 1980 to 2014, and government deficits were stable until the Great Recession....the net foreign account moves in the opposite direction. The United States as a whole borrowed more from the rest of the world during this time period... This leaves only one remaining margin: the rest of the U.S. household sector must have reduced saving substantially. This is what the analysis finds. Saving by the bottom 90% of the income distribution fell significantly over this time frame. The rise in saving of the top 1% was associated with a substantial dis-saving by the bottom 90%.... The results show that the rise in household debt owed as a liability was driven by the bottom 90% of the income distribution, where as the rise in house hold debt held as a financial asset was driven by the top of the wealth distribution. This suggests that a better measure of house hold debt claims across the wealth distribution is net household debt owed, which is defined as gross household debt owed minus household debt held as a financial asset. Net household debt positions clarify that the post 1980 period was one in which rich Americans increasingly financed the borrowing of non-rich Americans. The net household debt position of the top 1% fell by 20 percentage points of national income since 1980 which reflected their accumulation of house hold debt held as a financial asset. In contrast, the net house hold debt position of the bottom 90%increased by 40 percentage points.... Analysis using variation across states in the rise in top income shares shows that income growth at the top of the income distribution can explain 75%of the accumulation of household debt held as a financial asset by households in the United States. After the Great Recession, evidence suggests that the saving glut of the rich has been financing government deficits to a greater degree…”
new Mian/Sufi on the "savings glut of the rich" which they argue domestic rich savers (with a qualifier "may be") linked to the "dis-saving" of the bottom 90%.



Ed Comment:“I gave the paper a quick read. It's a valuable contribution. But it's a small piece of a larger macro picture. Of course as the income of the top1% grows relative to GDP, so too will their savings. The riskiness of the economy has grown significantly since the 1960s as well as our understanding of those risks. No surprise risk underwriters are carrying more low-risk assets. That said, I agree that's not the only reason. In the 60s, manufacturing was having an enormous positive impact of the economy -- see Gordon's book. There was little offshore competition, especially from $3 an hour labor. We thought the US was invincible. Growth reduces risk. Growth was largely driven by low risk expansions of existing capacities. Unlike Gordon's book on Intel in the 1990s, (Only the Paranoid Survive) which is all about competition, Alfred Sloan's landmark 1960s book on GM is about organization. Competition was barely on his radar. The rest of the world has grown more competitive. Growth has slowed. Risky innovation now largely drives growth on its own. So does the growth of risky intangible investments overlooked in the paper. Employees and entrepreneurs underwrite risk through options, equity, and startups. Undiversified risk of this sort is much riskier to hold. Government policy is more f-ed up. And over time, we recognize more of these risks. Statisticians barely considered fat tail risks in the 1960s. No surprise risk-underwriters increasing hold low-risk assets to offset the risks they are bearing. My guess is if you do something to discourage that, they will find other ways to dial back risk--better more cash than less innovation. Most policy is the mistaken analysis of a world too complex to analyze, which results in unintended consequences. Mutation, survival of the fittest, and gradual evolution is far more likely to produce more optimal and robust results. That's why I favor free markets over dangerous armchair second guessing. The latter is highly likely to be wrong. Mian and Sufi don't have their noses far enough off the paper to recognize the factors I raise here much less to have considered them fully. They are great data analysts but sloppy macroeconomists.”