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Thursday, October 17, 2019

Losing the Future: The Decline of U.S. Saving and Investment

AI Summary. U.S. saving and investment have declined as a share of GDP over four decades, with investment persistently exceeding saving, leaving a net international investment position of negative $4.6tn and roughly $26.5tn of U.S. capital stock held by foreign investors. The authors argue the tax code discourages saving and investment, and that reform could raise productivity and wage growth.

Alan Cole The Tax Foundation
Date Posted:
October 17, 2019
Is Database:
Database

U.S. saving and investment have declined significantly as a % of GDP over the past 40 years, with investment persistently outpacing saving.

U.S. saving and investment have declined significantly as a % of GDP over the past 40 years, with investment persistently...

Does the U.S. tax code discourage saving and investment?

Core argument: The U.S. net international investment position stands at negative $4.6tn, meaning foreigners own $4.6tn more of American assets than Americans own abroad, with foreign investors holding roughly $26.5tn of the U.S. capital stock.

Over the past 40 years, U.S. saving and investment have declined significantly as a % of GDP, with investment persistently outpacing saving. This trend is evident in the U.S. net international investment position (NIIP), which stands at negative $4.6tn, indicating that foreigners own $4.6tn more of American assets than Americans own abroad. Foreign investors hold about $26.5tn of U.S. capital stock, highlighting America's reliance on foreign savings to fund domestic investments. While openness to foreign investment is beneficial, the U.S. would be better off if it saved enough to own more domestic capital. The current tax code exacerbates this issue by discouraging saving and investment, suggesting that tax reform could help the U.S. save and invest at more prudent rates, ultimately enhancing productivity and wage growth.

Takeaways by Macro Roundup® AI

  1. The U.S. net international investment position stands at negative $4.6tn, meaning foreigners own $4.6tn more of American assets than Americans own abroad, with foreign investors holding roughly $26.5tn of the U.S. capital stock.
  2. U.S. saving and investment have both declined significantly as a share of GDP over the past 40 years, with investment persistently outpacing saving and America relying on foreign savings to fund domestic investment.
  3. The U.S. tax code discourages saving and investment, and tax reform could help the country save and invest at more prudent rates, enhancing productivity and wage growth.

"... America Does Not Save Enough to Cover its Domestic Investments American investment has remained persistently higher than American saving.This is because,despite its lack of saving, America is a fairly good place to own investments, and foreign savers recognize this.The physical manifestation of this economic trend is that foreign investors own more property in America than Americans own abroad. A particularly visible example is on the New York skyline. The Chrysler Building, the iconic 77-story tower on Lexington Avenue, is 90 percent owned by the Abu Dhabi Investment Council. There is nothing particularly special about this transaction; it is one of many. But it is representative of the trend that Americans do not save enough to own the capital contained within America. Openness to foreign investment is a good thing, a hallmark of a free and open society. The flow of rent—from American tenants in New York to landlords in Abu Dhabi—is perhaps no big deal in the grand scheme of things. But it is a missed opportunity. America would be strictly better off, of course, if it had saved enough money to continue owning the building itself. Collectively, transactions like this one create a bigger picture where America owns less of the outside world than the outside world owns of America. There is a measure of this phenomenon called net international investment position (NIIP.) The U.S. NIIP is about negative $4.6 trillion, meaning that foreigners own about $4.6 trillion more of American assets than Americans own of foreign assets. Foreign investors own about $26.5 trillion of the stock of investments in the United States. Economists call this the capital stock. But not all of the capital stock can be financed from abroad, and in any case, there are cross-border transaction costs. The U.S. may be a bit over-reliant on foreign saving to supply it with the investments it needs to be productive...Investment Increases Wages.... The benefits of a high capital stock are shared broadly. As a country attracts high amounts of capital, workers become more productive. Additionally, local workers gain more bargaining power as more high-value employers enter the area. When a billion-dollar automobile assembly plant is built in a city, the corporation that owns the plant has a strong, permanent stake in competing for local workers, even if it requires substantially higher wages. The upward pressure on wages becomes even stronger with more investment. This is a principle that applies to all kinds of capital-rich areas, and most workers understand it intuitively....”
Alan Cole, "Losing the Future: The Decline of U.S. Saving and Investment," The Tax Foundation, October 1, 2014, https://taxfoundation.org/losing-future-decline-us-saving-and-investment/

Losing the Future: The Decline of U.S. Saving and Investment

Key Findings

  • Saving and investment are necessary for a society to adequately provide for its future.
  • Saving and investment have declined substantially as a percentage of GDP over the last 40 years, and have collapsed almost entirely since the financial crisis.
  • American private saving barely keeps pace with total government deficits. On the whole, the country saves very little.
  • American investment barely keeps pace with depreciation; U.S. private and public capital stock and infrastructure deteriorates almost as quickly as it can be repaired or replaced with new investment.
  • The U.S., overall, does not save enough money to fund all of the worthwhile domestic investments and relies substantially on foreign investors to make up the difference.
  • Tax reform could help the U.S. become a forward-looking economy that invests and saves at more prudent rates.

    Introduction

    A society provides for its future by accumulating both physical and financial assets with lasting value. The United States, one of the wealthiest countries in the world, has long been a forward-thinking country that builds for tomorrow through saving and investment.

    However, over the last fifty years, U.S. saving and investment have eroded substantially, and during the most recent financial crisis, they collapsed almost completely. At the national level, the U.S. is essentially treading water. Citizens are barely running enough household surplus to make up for government deficits, and businesses are barely investing enough new capital to make up for the depreciation of old capital.

    Saving gives us security, while investment gives us rising incomes through enhanced productivity. America could do well with a great deal more of both.

    Currently, the U.S. tax code places substantial burdens on saving and investment. As the world has globalized, other nations have made themselves more attractive destinations for investment by changing their tax codes. The United States would be wise to follow suit.

    National Saving Is American Ownership of Assets and Freedom from Liabilities

    One way for a society to provide for its future is by saving—diverting some of its income into assets with lasting value rather than using it all for immediate consumption. This process can start, for example, when a family puts aside some of its earnings into a saving account at a bank. The bank can then lends the money out to a business, which purchases new equipment.

    This is a creation of assets and liabilities. The family owns a bank deposit, an asset. The bank owes the family money—a liability—but the bank owns the corporate bond, which counts as an asset. Finally, the business owes the bank—a liability—but it also owns new equipment, which counts as an asset.

    Frequently, as with the bank’s loan to the business, one American’s asset is another American’s liability, and they cancel out. But on net, real wealth was saved in this example. The family ultimately enabled the purchase of the business equipment, a tangible representation of real wealth. The family has an asset—the saving account—and no liabilities. The way America saves, then, is if the whole country—individuals, organizations, and governments—acquires more assets than liabilities.

    Assets are things like homes, shares of corporations, physical capital (such as machinery and factory buildings), and foreign bonds. Liabilities are things like debts, both private (mortgages) and public (treasury bills). Assets and liabilities are not just important as a measure of static wealth. They are important because of the capital income that flows from them. People who lend collect interest. People who borrow pay interest. Landlords receive the rent that tenants pay. Ownership is both a barometer of current financial success and a tool to enable future financial success.

    When America as a whole accumulates more assets than liabilities, it becomes richer. Furthermore, it can expect returns on those assets, providing it with sources of income in the future. If America wants to become wealthier, saving helps. Unfortunately, the United States has done a poor job with this, both in the lead up to the financial crisis and in the years since.

    The Last Decade in Saving

    Over the last ten years—both before and after the Great Recession—the private sector has accumulated more assets than liabilities. It has saved. Meanwhile, the government has accumulated more liabilities than assets—the opposite of saving, or “dissaving.” This is primarily represented by government deficits.

    Stay Informed on Tax Policy Research and Analysis

    Note in Figure 1 that government dissaving is frequently about as large as—or, in the case of the years 2008 to 2011, larger than—private sector saving. National savings is the sum of both public and private saving. On net, America is saving only a small percentage of its income; less than 4 percent for every year between 2004 and 2013, and less than 0 percent for several of them.

    This is not to contrast a virtuous public with a spendthrift government. Rather, it is to show that, on the whole, large changes in government deficits were matched by an equal and opposite reaction in the private sector.

    Incidentally, this reveals some of the limits of fiscal stimulus. Some government spending—particularly “automatic stabilizers” like means-tested benefits—can stabilize the consumption of people hit hardest by recessions. However, much of that stimulus ends up in banks, which may invest in the very same treasury bonds issued to create the fiscal stimulus in the first place. In the end, the banks owe the depositors, the government owes the banks, and the citizens are taxed by the government, resulting in no change in American wealth of any kind.

    Low Personal Saving Contributed to the Great Recession

    Consider the finances of buying a home. A home is an asset, but a mortgage is a liability. One critical characteristic of the subprime loans issued in the last decade were low (or no) down payments. In fact, the National Association of Realtors reported in 2006 that the median first-time homebuyer financed 98 percent of the purchase price of the home.

    The accounting for this kind of transaction is fairly straightforward. The house and the mortgage virtually cancel each other out as an asset and a liability. The net saving is only the amount of the down payment. With only 2 percent down, even a minimal fall in price creates an underwater mortgage situation.

    Borrowing in order to buy something is called “leveraging.” Leveraging can help finance useful activity, like home ownership, but it also comes with risks. Life becomes very difficult if the value of the asset you bought declines; if that happens, your asset is worth less but the value of your debt remains the same, and you might not be able to repay it.

    Dangerously high leverage is the only way for people to finance high levels of consumption without saving first. In 2008, that high leverage proved itself disastrous when house prices fell. While this simple feature of subprime mortgages is only part of the story of the financial crisis, it is an important part. People with savings can insulate themselves from hard times in a way that people without savings cannot.

    Saving Contributes to Investment

    While the primary benefit of saving comes to the saver, national saving also allows us to invest in physical assets that help everyone. In the example of saving described above—where a family saves money and deposits it into the bank, and the bank lends that money to a business for the purchase of a new machine—the machine is what economists call investment.

    Investment is the process by which financial savings are turned into real assets. Investment is important because it allows the benefits of individual saving to be shared more broadly. The purchase of equipment makes the workers at the business more productive, raising their wages, and helps the economy produce more goods overall for consumers to use.

    As saving has declined in the U.S., though, so has investment.

    Figure 2 (above) includes all saving and investment in the U.S. as a percentage of GDP, including both the private and public sectors. Over the last four decades, saving and investment have continued on a downward trend, falling from over 10 percent of GDP to less than 4 percent today.

    Saving and investment move in similar patterns overall. In general, saving is necessary to enable investment. But saving and investment are not exactly the same thing; in the U.S., investment outpaces saving. This discrepancy exists because the United States has an open economy. Foreign savers can purchase investments in our nation, and vice versa. Much of the investment in America is financed from abroad. Foreign savers, in other words, are stepping in with their savings to fund the investments that American savers cannot afford.

    There are limits to how much foreign savers can step in, though. Small businesses, like sole proprietorships, almost certainly must be owned domestically. Public investments, like highways, are owned by the government. And owner-occupied housing, by definition, must be owned by someone who lives here. For many of our investments, the financing must come from within.

    America Does Not Save Enough to Cover its Domestic Investments

    American investment has remained persistently higher than American saving. This is because, despite its lack of saving, America is a fairly good place to own investments, and foreign savers recognize this. The physical manifestation of this economic trend is that foreign investors own more property in America than Americans own abroad.

    A particularly visible example is on the New York skyline. The Chrysler Building, the iconic 77-story tower on Lexington Avenue, is 90 percent owned by the Abu Dhabi Investment Council. There is nothing particularly special about this transaction; it is one of many. But it is representative of the trend that Americans do not save enough to own the capital contained within America.

    Openness to foreign investment is a good thing, a hallmark of a free and open society. The flow of rent—from American tenants in New York to landlords in Abu Dhabi—is perhaps no big deal in the grand scheme of things. But it is a missed opportunity.

    America would be strictly better off, of course, if it had saved enough money to continue owning the building itself. Collectively, transactions like this one create a bigger picture where America owns less of the outside world than the outside world owns of America. There is a measure of this phenomenon called net international investment position (NIIP.) The U.S. NIIP is about negative $4.6 trillion, meaning that foreigners own about $4.6 trillion more of American assets than Americans own of foreign assets.

    Foreign investors own about $26.5 trillion of the stock of investments in the United States. Economists call this the capital stock. But not all of the capital stock can be financed from abroad, and in any case, there are cross-border transaction costs. The U.S. may be a bit over-reliant on foreign saving to supply it with the investments it needs to be productive.

    Investment Increases Wages

    The benefits of a high capital stock are shared broadly. As a country attracts high amounts of capital, workers become more productive. Additionally, local workers gain more bargaining power as more high-value employers enter the area. When a billion-dollar automobile assembly plant is built in a city, the corporation that owns the plant has a strong, permanent stake in competing for local workers, even if it requires substantially higher wages. The upward pressure on wages becomes even stronger with more investment.

    This is a principle that applies to all kinds of capital-rich areas, and most workers understand it intuitively. There is a reason why skilled pile driver operators are paid well; if a company is willing to pay $700,000 for a pile driving rig, it will pay a premium to make sure the equipment is operated properly. This principle is, in fact, one of the primary reasons that American workers are paid so well by worldwide standards.

    Investment Collapsed During the Recession

    Since the Great Recession, American investment has come to a standstill, slowing wage growth. Even well into the recovery, America’s gross investment is still not much different than it was a decade ago.

    Real American investment, prior to the recession, tended to increase with time. However, the last ten years have been a sort of lost decade for America; gross investment was $3.03 trillion in 2004, and it was $3.03 trillion in 2013. The last peak in investment came in the period of 2005 to 2006 just after the 2003 tax cuts reduced the cost of capital but before the housing bubble burst.

    Unfortunately, this picture looks far worse when we remember the depreciation, or wearing down, of former capital investments. Bridges develop structural faults and need to be shored up. Buildings need repair. Industrial equipment reaches the end of its usable life and requires replacement.

    When we subtract depreciation from gross investment to look at net investment, we see a bleak picture of what the 2008 recession did to investment in the United States. Much of that gross investment (or, in some sectors, all of that gross investment) is offset by depreciation, resulting in no net increase in wealth.

    The most obvious trend is the housing bubble; net investment in housing was strong, but then it took a dramatic turn toward zero as the crisis developed. But the construction of plants and equipment—the stuff of industry—faltered as well, with greater levels of depreciation than investment. Even government—though it might be a small portion of national investment—invested less.

    There is a place in this country for debate over what investments should be private and what investments should be public. It’s quite another thing to make barely any new net investments at all. A common perception of our economic malaise is that even if things aren’t getting worse anymore, they aren’t getting better, either. A great deal of this has to do with the fact that our capital stock is barely holding steady. Our possessions are falling into disrepair almost as fast as we build new ones.

    It is also no wonder that talk about business in America is about “disruption” and innovative ideas; we aren’t getting rich the old-fashioned way anymore by building better physical infrastructure. The only sort of “capital” that has gained substantially over the last few years is intellectual property, which is great for the innovators in Silicon Valley and consumers all over the country, but hardly beneficial for the vast majority of workers employed outside of high-tech industries.

    A One-Marshmallow Nation

    In thinking about America’s slow economic growth, the Stanford marshmallow experiment comes to mind. In Walter Mischel’s famous series of studies on delayed gratification, participants were offered the choice between one marshmallow immediately or two marshmallows in the future. In other words, it was a very literal tradeoff between current and future consumption. In follow-up studies, researchers found that the patience to wait for the larger reward was correlated with all kinds of superior outcomes later in life, like higher educational attainment or SAT score. In light of this framework, the United States should perhaps consider more ways to become a two-marshmallow nation—one that defers immediate rewards for greater gains in the future.

    Unfortunately, the incentives offered by the tax code have the opposite effect. Capital gains taxes are high—well above the OECD average—which creates a bias against saving. Corporate taxes provide small, short-term revenue gains, but make the U.S. unattractive for investment. In a sample of 163 countries or tax jurisdictions, the U.S. top corporate rate was third highest in the world, behind only the United Arab Emirates and Chad.

    These taxes on capital income lower the after-tax return on capital; in effect, they change the tradeoff between tomorrow and today, making it less beneficial to wait for tomorrow. A fair way to tax capital income that does not change the tradeoff between tomorrow and today would be something more similar to the treatment of Traditional IRA contributions. The money in the IRA is taxed once, at ordinary rates, when it is withdrawn.

    The non-neutrality of the tax code is a strong contributing factor in the decline of U.S. saving and investment. The U.S. could improve its saving and investment by reducing these taxes, moving to a territorial corporate tax system like those used in the rest of the world, or improving capital allowances in the corporate code.

    Conclusion

    Declining saving and investment are a long-term trend in the United States. No individual policy, presidential administration, or event bears sole responsibility for the problem. Tax reform, however, is part of the solution.

    The current tax code is a one-marshmallow tax code. It encourages Americans to consume their income immediately by artificially lowering the rates of return on saving. It is non-neutral between present consumption and saving for future consumption. That non-neutral treatment is a violation of a principle of good tax policy; good tax policy treats all economic activity equally. Yet it is also a violation of a greater principle: the principle that we ought to leave a better world for our children than the one given to us. We are a wiser people than what these trends represent.

    American workers are highly productive. They are industrious, entrepreneurial, and innovative, and they will continue to earn high wages, even under a poor tax regime. But the country would have greater prosperity in its future if it saved and invested more judiciously today. A better tax regime would contribute substantially to that better future.

    National Association of Realtors, 2006 National Association of Realtors Profile of Home Buyers and Sellers (Nov. 2006).

    This is a separate idea from the vernacular idea of “investment,” in which, for example, an individual purchases shares of stock or real estate. National accounts call only the construction of the asset “investment,” such that the asset doesn’t get double-counted as it changes hands.

    In an entirely closed economy, such as the planet Earth, saving and investment would be entirely equal as a matter of accounting identity.

    Charles V. Bagli, Abu Dhabi Buys 90% Stake in Chrysler Building, New York Times, July 10, 2008, http://www.nytimes.com/2008/07/10/nyregion/10chrysler.html.

    Bureau of Economic Analysis, International Data, International Transactions and International Investment Position Tables, Table 1.1. U.S. International Transactions, http://www.bea.gov/iTable/iTableHtml.cfm.

    Kyle Pomerleau, The High Burden of State and Federal Capital Gains Tax Rates, Tax Foundation Fiscal Fact No. 414 (Feb. 11, 2014), https://taxfoundation.org/article/high-burden-state-and-federal-capital-gains-tax-rates.

    Kyle Pomerleau, Corporate Income Tax Rates around the World, 2014, Tax Foundation Fiscal Fact No. 436 (Aug. 20, 2014), https://taxfoundation.org/article/corporate-income-tax-rates-around-world-2014.

    Will McBride, How Tax Reform Can Address America’s Diminishing Investment and Economic Growth, Tax Foundation Fiscal Fact No. 395 (Sept. 23, 2013), https://taxfoundation.org/article/how-tax-reform-can-address-america-s-diminishing-investment-and-economic-growth.

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Friday, October 18, 2019

Measuring Income Concentration - A Guide for the Confused

AI Summary. Two leading estimates of US income concentration diverge sharply: one finds the top 1% income share rose from 9.1% to 15.6% over roughly three decades, while the other finds a smaller increase from 7.2% to 8.5%. The authors attribute about 80% of the gap to differing treatment of underreported income, retirement income, and sales taxes.

Scott Winship United States Congress Joint Economic Committee
Date Posted:
October 18, 2019
Is Database:
Database

The debate btw Auten/Gerald/Splinter (AS) and Saez/Zucman (PSZ) on income inequality reveals significant differences in methodology and results. PSZ report a rise in the top 1% income share from 9.1% to 15.6% btw 1979 and 2015, while AS find a smaller increase from 7.2% to 8.5%.

Why do leading estimates of top income shares differ so much?

Core argument: Piketty-Saez-Zucman report the top 1% income share rising from 9.1% to 15.6% between 1979 and 2015, while Auten-Gerald-Splinter find a smaller increase from 7.2% to 8.5% over the same period.

The debate between Auten/Gerald/Splinter (AS) and Saez/Zucman (PSZ) on income inequality reveals significant differences in methodology and results. PSZ report a rise in the top 1% income share from 9.1% to 15.6% between 1979 and 2015, while AS find a smaller increase from 7.2% to 8.5%. Key discrepancies arise from how underreported income, retirement income, and sales taxes are treated. AS attribute 80% of the gap to these factors, noting PSZ's allocation of corporate retained earnings and sales taxes may overstate inequality. AS's reliance on IRS audit studies and their treatment of offshore wealth suggest a more modest rise in inequality. The choice of unit analysis and ranking methodology further explains the divergence, with AS focusing on individuals ranked by size-adjusted income. These methodological differences underscore the complexity of measuring income concentration and highlight the importance of transparency in economic research.

Takeaways by Macro Roundup® AI

  1. Piketty-Saez-Zucman report the top 1% income share rising from 9.1% to 15.6% between 1979 and 2015, while Auten-Gerald-Splinter find a smaller increase from 7.2% to 8.5% over the same period.
  2. Auten-Gerald-Splinter attribute 80% of the gap between the two estimates to the treatment of underreported income, retirement income, and sales taxes, arguing that Piketty-Saez-Zucman's allocation of corporate retained earnings and sales taxes may overstate inequality.
  3. Auten-Gerald-Splinter rank individuals by size-adjusted income and rely on IRS audit studies and their own treatment of offshore wealth, choices that account for part of the divergence from Piketty-Saez-Zucman.

Winship on Auten/Gerald/Splinter versus Saez/Zucman

"....PSZ find the top one percent share rising 6.5 points, from 9.1 percent to 15.6 percent from 1979 to 2015. In contrast, AS report it increasing only from 7.2 to 8.5 percent....how we have arrived at the present, when one set of researchers can claim that this share rose by 8.5 percentage points from 1979 to 2015, while another can claim a rise of only 1.3 points....In Figure 5, the two middle lines carry over from Figure 1 the income concentration estimates from the two research teams that examine the fiscal income of tax units. As noted earlier, those trends lie very close to one another. The two thick solid lines show trends in the top one percent’s share when using pre-tax income and assessing inequality across individuals rather than tax units. (The other dashed lines show intermediate steps in moving from tax-unit fiscal income to individual pre-tax income. For the PSZ estimates, the intermediate step moves from tax-unit fiscal income to tax-unit pre-tax income. For the AS estimates, it moves from tax-unit fiscal income to individual fiscal income.)Note that the “pre-tax” estimates use the PSZ definition, which is actually more like pre-tax, post-social-insurance income, since it counts Social Security and unemployment insurance but no other transfers. (AS do not include social insurance in their pre-tax measure, but it is possible to allocate it using their spreadsheet.) PSZ find that the top one percent’s share of pre-tax income was 12 percent in 1979 and 20 percent in 2015. The AS estimates suggest an increase from 9 percent to 13 percent in 2015. Thus, inequality is lower in the AS data than in the PSZ data, and it rises less (a four-point rather than an 8.5-point increase from 1979 to 2015). What accounts for these differences? In their paper, AS attempt to reconcile their estimates with those of PSZ. They find that over half of the difference in the 1979-to-2014 increase between the two papers (2.4 points of the 4.3-point gap) derives from differences in how underreported income and retirement income are treated. Discrepancies between how non-retirement corporate income and sales taxes are allocated explain another one point. Together, these four categories explain 80 percent of the gap in inequality growth between the two papers.That leaves the question of which team is closer to the truth. Regarding underreporting, both PSZ and AS allocate unreported income that is incorporated in the US national accounts. AS rely heavily on IRS audit studies, which they note are the basis for the national accounts estimates of underreported income. PSZ have argued that the audit studies fail to account for the underreported income of complex partnerships, citing Cooper et al. (2016). However, in their appendix, AS show that even if half of the income of such partnerships estimated by Cooper et al. was unreported and it all belonged to the top one percent, the top one percent share would only rise by 0.3 percentage points in 2014. In response to PSZ claims that accounting for income from offshore wealth would raise inequality, AS conduct a sensitivity check using estimates of offshore wealth from Saez and Zucman (2016) and rates of return the exceed estimates in the literature. They find that the top one percent’s share would be raised by only a couple of tenths of a percentage point. For their part, AS fault PSZ for allocating too little underreported business income to people with negative reported business income (and thus too much to people with already-high reported business income). PSZ has not responded to this criticism in their papers. Regarding the discrepancies related to retirement income allocation, in the online appendix to their paper,AS cite Devlin-Foltz, Henriques, and Sabelhaus (2016), who find the top one percent own 8 percent of retirement wealth—much closer to AS’s estimate of the top’s share of retirement income (6 percent) than PSZ’s (16 percent). AS note a clear error on the part of PSZ in that they include rollovers on tax returns as income when they back into aggregate retirement wealth, to which they then apply a rate of return to estimate full retirement income. Rollovers in a given year do not represent income generated by wealth in that year and received by retirees; rather they represent wealth itself being transferred between accounts. PSZ has not responded to this criticism in their papers. Regarding sales tax allocation, AS note that PSZ do so on the basis of labor and business income less savings, which takes no account of retirement income, taxes, or transfers and their impact on purchasing power. Arguably, however, rather than coming from the pockets of consumers, sales tax ultimately may come from the pockets of workers and business owners who would see higher pay or profits if not for the taxation. PSZ updated their estimates in 2019, and in their latest version they allocate 70 percent of sales taxes across consumers (taking into account retirement income, some taxes, and some transfers), and 30 percent according to labor and business income. Finally, regarding nonretirement corporate income, Smith, Zidar, and Zwick (2019) point out that PSZ likely overstate income concentration by allocating corporate retained earnings on the basis of dividends and realized capital gains (both forms of taxable income from C-corporations), since only some—perhaps a minority—of realized gains come from sale of corporate stock (real estate sales being a primary alternative source of gains). In effect, they are giving corporate retained earnings to well-off people who don’t have ownership in corporations. In the online appendix to their 2018 paper, PSZ enumerated several issues with an earlier draft of the AS paper. Most of these objections were addressed in the latest AS paper. In some cases AS changed their methods in response; in others (noted above) they defended their choices. PSZ’s revised appendix no longer includes the section addressing the earlier AS paper, and it has not been replaced by a new response. Instead, PSZ (2019) approach the revised AS paper through several general criticisms. First, they compare the aggregate amount of national income AS estimate going to the top one percent in 2015 to the amount of fiscal income Piketty and Saez (2003) estimate going to it. They note that AS find less income going to the top than Piketty and Saez, despite national income being more comprehensive than fiscal income. But this is an inappropriate comparison because the Piketty-Saez estimates they cite include realized capital gains. Realized gains reflect undistributed retained earnings (included in national income) but also pure price changes in assets that are unrelated to production (excluded from national income). The latter constitute a substantial amount of fiscal income. PSZ also conduct a back-of-the-envelope exercise suggesting that AS must be allocating untaxed income (as opposed to fiscal income) in ways that imply dramatically falling inequality in untaxed income over time. However, their exercise proceeds from the Piketty-Saez fiscal income estimates (looking at tax units ranked by tax-unit income) as if AS were also looking at tax units ranked by tax-unit income. In actuality, the AS national income estimates report the share of income received by the tax units containing the top one percent of individuals, ranked by size-adjusted tax unit income. The estimates in AS’s Table 1 suggest that a sizable proportion of the reduced rise in inequality they find, relative to the Piketty-Saez estimates, can be attributed to this change in the unit of analysis and ranking methodology—roughly one-fourth of reduction from 1960 to 2015. In their response to PSZ, AS show that the assumptions PSZ use in their back-of-the-envelope exercise about how untaxed income is distributed in the AS estimates are simply wrong. PSZ’s exercise assumes that the share of 2016 untaxed capital income not earned on pension plans that AS give to the top one percent is 10 percent (versus the 40 percent that PSZ use to reproduce their own estimates in a similar exercise). But AS report that this amount is actually 29 percent in their data in 2015. Using the equation on page 26 of AS’s online appendix, one can confirm that the PSZ exercise produces the result that it does (low concentration of untaxed capital income outside pension plans) because they ignore that AS are looking at individuals ranked by size-adjusted income. Setting the top one percent shares of imputed rent and private capital (which, together, constitute capital income outside pension plans) to 10 percent, as in the PSZ exercise, and zeroing out the decline in the top share that is attributable to the change of units and ranking methodology, the aggregate income amount going to the top one percent is consistent with the amount AS actually allocate to them. PSZ have only shown one way to produce, from the distribution of fiscal income by tax unit, a national income concentration trend that happens to align with the AS trend based on ranking individuals by size-adjusted income. To close out this primer, Figure 6 carries over the pre-tax trends from Figure 5 and also displays the post-tax estimates from PSZ and AS. Most of the difference between the post-tax series, in terms of how much inequality rises, is due to the pre-tax estimates diverging. The way that AS allocate government consumption (non-transfer expenditures) and government deficits leads their inequality measure to decline by around one point more than it would if they used the PSZ approach. AS argue that by allocating government consumption strictly by after-tax income, PSZ reject the possibility that public goods benefit everyone equally or that some government consumption expenditures redistribute well-being downward. Regarding (non-Social Security) deficits, AS allocate by federal income taxes. PSZ allocate half by government transfers and half by taxes, which seems a compromise between allocating by who pays for deficits and by who benefits from them...."

Winship, Scott, "Measuring Income Concentration - A Guide for the Confused," United States Congress Joint Economic Committee," October 16, 2019, https://www.jec.senate.gov/public/index.cfm/republicans/analysis

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