Government spending redirects real resources in the economy and can crowd out private capital formation. An additional $1 trillion debt this year could decrease GDP by as much as 0.28 percent in 2050.
Public infrastructure investment boosts the productivity of private capital and labor, leading to higher output, but this positive effect can be offset if the investment is financed with additional government borrowing. PWBM estimates that an illustrative 10-year, $2 trillion public investment plan will raise public capital by 4.6 percent but lower private capital by 0.8 percent in 2040, with a net zero effect on GDP in 2040.
We estimate that Sen. Capito’s $330 billion infrastructure package, funded by user fees over 8 years, would increase GDP by about 0.05 percent in 2050. A $579 billion infrastructure investment being considered by a bipartisan group of senators, would increase output in 2050 by 0.1 percent if funded by user fees or have roughly zero net effect on GDP if deficit financed.
PWBM estimates that the learning loss from school closures reduced GDP by 3.6 percent in 2050. Extending the 2021-22 school year by one month would cost about $75 billion nationally but would limit the reduction in GDP to 3.1 percent. This smaller reduction in GDP produces a net present value gain of $1.2 trillion over the next three decades, equal to about a $16 return for each $1 invested in extending the 2021-22 school year.
PWBM projects that the American Families Plan (AFP) would spend $2.3 trillion, about $500 billion more than the White House’s estimate, over the 10-year budget window, 2022-2031. We estimate that AFP would raise 1.3 trillion in new tax revenue over the same period. By 2050, the AFP would increase government debt by about 4 percent and decrease GDP by 0.3 percent.
PWBM estimates that raising the top statutory rate on capital gains to 39.6 percent would decrease revenue by $33 billion over fiscal years 2022-2031. If stepped-up basis were eliminated—as proposed in President Biden’s campaign plan—then raising the top rate to 39.6 percent would instead raise $113 billion over 2022-2031.
While corporations are at historically high levels of debt relative to assets, leverage remains close to its historical average relative to firms’ market value and relative to interest expense as a fraction of cashflow. In PWBM’s dynamic firm model, reducing the deductibility of interest expenses by 10 percentage points decreases corporate output by 0.26 percent while decreasing corporate debt by 6.76 percent.
PWBM projects that the American Jobs Plan proposed by President Biden would spend $2.7 trillion and raise $2.1 trillion dollars over the 10-year budget window 2022-2031. The proposal’s business tax provisions continue past the budget window, decreasing government debt by 6.4 percent and decreasing GDP by 0.8 percent in 2050, relative to current law.
PWBM projects that by 2050, the legalization provisions of the U.S. Citizenship Act proposed by President Biden would increase the size of the U.S. population by 4.21 percent, increase GDP by 0.5 percent, but decrease GDP per capita by 0.2 percent. More specific legalization proposals targeted at farm workers, DACA recipients, and essential workers would each increase GDP per capita by 0.1 percent in 2050.
PWBM projects that vaccinating all those eligible by reducing vaccine hesitancy would prevent up to 8.3 million cases in 2021, increase employment by 2.6 million in December 2021, and boost Q4 2020 to Q4 2021 GDP growth by 2 percentage points. In fact, failure to reduce vaccine hesitancy could lead to a “perfect storm” if people also become optimistic and increase their social contact rates beyond the baseline rates that we previously projected. Indeed, increasing social contact rates to 85 percent of pre-COVID levels by the end of 2021 would lead to up to 4.6 million additional COVID-19 cases in 2021.
