"The paper focuses on the slippage in the net worth ratio among households under age 35 relative to all households between 1983 and 2022 and its phenomenal rise among households aged 75 and over. Based on differential leverage between the two groups (the much higher debt- net worth ratio among younger families compared to older ones), we would have expected exactly the opposite – namely, that the net worth of younger households should have risen relative to older ones. Indeed, the average real rate of return on net worth of the youngest age group over years 1983-2022 was 5.67 percent while that of the oldest was 3.29 percent. What factors explain these seemingly perverse results?
The first is increasing net home equity for the elderly. The increase in the ratio of mean net home equity to the overall level over 1983- 2022 explains a substantial 38.3 percent of the relative gain in net worth of the 75 and over age group but very little for that of the youngest group. The second is surging mortgage debt among the youngest households. This explains 297 percent (.160/.054), of the actual decline in the group’s mean net worth ratio – that, is almost three times the actual decline. Its relative decline also accounts for a significant 35.2 percent of the increase in the oldest group’s mean net worth ratio. However, it should be stressed that these results are not additive across the various factors considered in the analysis.
Third, the homeownership rate might well be close to a “smoking gun” for the oldest age group. It shoots up by 11.5 percentage points for this group, and the group’s relative wealth holdings expand by a sizeable 50.4 percent. Likewise, relative to the overall average homeownership rate, that of the oldest enlarges by 8.9 percentage points from 6.0 to 14.9 percent. The fourth is the fantastic growth in stock holdings among the oldest age group, which could constitute another smoking gun. The value of the group’s stock portfolio relative to the overall average skyrockets from 0.56 to 3.47, which accords with the sharp increase in its relative net worth, and accounts for a staggering 269 percent of its gain in net worth relative to the overall average.
Fifth, among the youngest age group, despite dire press reports, educational loans fail to appear as a significant factor. As a fraction of overall mean student debt, it actually fell from 2.45 in 2007 (the first date of available data) to 1.66 in 2022, so that the trend is contrary to that of the group’s relative net worth. Moreover, subtracting the change in the group’s mean educational debt over 2007- 2022 from its 2007 net worth ratio lowers the group’s mean net worth ratio by a rather trivial 0.006.”
Summary from the paper:
"The paper focuses on the slippage in the net worth ratio among households under age 35 relative to all households between 1983 and 2022 and its phenomenal rise among households aged 75 and over. Based on differential leverage between the two groups (the much higher debt- net worth ratio among younger families compared to older ones), we would have expected exactly the opposite – namely, that the net worth of younger households should have risen relative to older ones. Indeed, the average real rate of return on net worth of the youngest age group over years 1983-2022 was 5.67 percent while that of the oldest was 3.29 percent. What factors explain these seemingly perverse results?
The first is increasing net home equity for the elderly. The increase in the ratio of mean net home equity to the overall level over 1983- 2022 explains a substantial 38.3 percent of the relative gain in net worth of the 75 and over age group but very little for that of the youngest group. The second is surging mortgage debt among the youngest households. This explains 297 percent (.160/.054), of the actual decline in the group’s mean net worth ratio – that, is almost three times the actual decline. Its relative decline also accounts for a significant 35.2 percent of the increase in the oldest group’s mean net worth ratio. However, it should be stressed that these results are not additive across the various factors considered in the analysis.
Third, the homeownership rate might well be close to a “smoking gun” for the oldest age group. It shoots up by 11.5 percentage points for this group, and the group’s relative wealth holdings expand by a sizeable 50.4 percent. Likewise, relative to the overall average homeownership rate, that of the oldest enlarges by 8.9 percentage points from 6.0 to 14.9 percent. The fourth is the fantastic growth in stock holdings among the oldest age group, which could constitute another smoking gun. The value of the group’s stock portfolio relative to the overall average skyrockets from 0.56 to 3.47, which accords with the sharp increase in its relative net worth, and accounts for a staggering 269 percent of its gain in net worth relative to the overall average.
Fifth, among the youngest age group, despite dire press reports, educational loans fail to appear as a significant factor. As a fraction of overall mean student debt, it actually fell from 2.45 in 2007 (the first date of available data) to 1.66 in 2022, so that the trend is contrary to that of the group’s relative net worth. Moreover, subtracting the change in the group’s mean educational debt over 2007- 2022 from its 2007 net worth ratio lowers the group’s mean net worth ratio by a rather trivial 0.006.”