By Edward Conard, an American Enterprise Institute visiting scholar. Excerpt:
"During Saez’s exalted period from
1950 to 1980, for example, when high marginal tax rates ruled America,
growth of total factor productivity — the portion of growth driven by
innovation, which is the chief source of growth today — fell from nearly
3.5 percent per year in the decade prior to the 1950s to less than
0.5 percent per year by the 1970s. America reduced marginal tax rates
during the 1980s, and total factor productivity growth doubled to about
0.75 percent per year. That hardly makes his case that lower marginal
taxes, higher income inequality, and greater influence by successful
investors over the government necessarily endanger democracy and
threaten prosperity."
See also
Marginal Tax Rate above 30% Likely Suboptimizes Social Welfare by Edward Conard. Excerpt:
"Stanford’s Charles Jones corrects glaring shortcomings in the Diamond/Saez’s
optimal tax analysis to show why top marginal tax rates of 30% or less
likely maximize social welfare in an innovation-driven economy. Jones
concludes:
“Because ideas are nonrival, each
person’s wage is an increasing function of the entire stock of ideas. A
distortion that reduces the production of new ideas therefore impacts
everyone’s income, not just the income of the inventor herself. These
conditions lead to a new term in the Saez (2001) formula for the optimal
top tax rate: by slowing the creation of the new ideas that drive
aggregate GDP, top income taxation reduces everyone’s income, not just
the income at the top. When the creation of ideas is the ultimate source
of economic growth, this force sharply constrains both
revenue-maximizing and welfare-maximizing top tax rates. For example, in
a baseline calculation, the revenue-maximizing top tax rate that
ignores the innovation spillover is 92%. In contrast, the rate that
incorporates innovation and maximizes a utilitarian social welfare
function is just 29%. Moreover, if ideas play an even more important
role than assumed in this baseline, it is possible for the optimal top
income tax rate to turn negative: the increase in everyone’s income
associated with subsidizing innovation exceeds the gains associated with
redistribution.”"
See also
Taxing Top Incomes in a World of Ideas by Charles I. Jones of Stanford & NBER. Here is the abstract:
"This paper considers the taxation of top incomes when the fol
lowing conditions
apply: (i) new ideas drive economic growth, (ii) the reward f
or creating a successful
innovation is a top income, and (iii) innovation cannot be perfectly targeted by a
separate research subsidy — think about the business method
s of Walmart, the
creation of Uber, or the “idea” of Amazon.com. These conditions lead to a new
term in the Saez (2001) formula for the optimal top tax rate: by slowing the creation
of the new ideas that drive aggregate GDP, top income taxation reduces everyone’s
income, not just the income at the top. When the creation of ideas is the ultimate
source of economic growth, this force sharply constrains both revenue-maximizing
and welfare-maximizing top tax rates. For example, for extreme parameter values, maximizing the welfare of the middle class requires a
negative
top tax rate:
the higher income that results from the subsidy to innovation more than makes
up for the lost redistribution. More generally, the calibrated model suggests that
incorporating ideas and economic growth cuts the optimal to
p marginal tax rate
substantially relative to the basic Saez calculation."
Evidence Indicates 75% of Business Pass-Through Income Is Owners’ Labor Income by Conrad.
"Contrary to Thomas Piketty’s far-fetched claim that “[human capital] is far less consequential than one might imagine,” a new NBER paper
finds “top earners are predominantly working rich,” mainly
“undiversified working-age owners of midmarket firms in skill-intensive
industries,” who “derive most of their income from human capital, not
physical or financial capital,” and that, “Less than 13% of people in
the 99.9th percentile derive most of their income from interest, rents, and other capital income.”
“Match[ing] 83% of top 1% individuals
born in 1980-1982 to their parents,” and “classif[ing] an individual as
self-made if her parents were not in the top 1%,” the researchers find,
“More than three out of four of these top earners did not have top 1%
parents.” They authors note, “This is a conservative classification, as
many children of the top 1% do not work for their parents’ firms and do
not receive especially large financial inheritances.”
To estimate the share of business income
attributable to owners’ labor, the researchers measure the effects of
owner deaths and retirements on firm profitably. They find a “-72:9%
impact of top 1% owner-deaths [on profits] and a noisier -92:3% impact
of top 0.1% owner-deaths.” Their “preferred owner-retirement percentage
impact of -82:5% … is nearly identical to [their] owner-deaths estimate.
From this, they conclude, “Three-quarters of private business profit”
is “human capital income.” They caution, “We may in fact understate the
working-rich share of top owners because pass-through income is not the
only form of “capital” income that includes disguised wages.”
Superior firm profitability is a
persistent and systematic characteristic of high earners. Firms owned by
top 0.1% earners enjoy profitability ($14K per worker) that is over
twice as large as the profitability ($5K per worker) of firms owned by
individuals in the bottom half of the top decile.
The authors note:
Our
classification of three-quarters of pass-through income as labor income
reverses the earlier finding in [Piketty, Saez and Zucman] that a
minority (45%) of top 1% imputed national income is labor income. Even
among million-dollar earners, 71% of fiscal income and 50% of imputed
national income is labor income. In the top 0.1%, labor income shares
fall to the still large numbers of 69% and 46%, respectively.
Turning to growth in the share of business income, the authors conclude:
Growth in
entrepreneurial income is explained by both rising labor productivity
and a rising share of value added accruing to owners. In contrast, after
accounting for the growth due to organizational form changes, rising
firm scale in the form of employment plays no role in the growth of top
entrepreneurial income. From 2001 to 2014…63% of the growth in top 1%
entrepreneurial income … comes from rising labor productivity, -24%
comes from lower employment, and the remaining 61% comes from a growing
owner share of value added.
The authors note:
If 0% of
pass-through income is labor income…a minority of top-earners are wage
earners. For example, among million-dollar earners … 46.8% are wage
earners in the fiscal income definition and only 34.6% are wage earners
in the imputed national income definition. That conclusion reverses when
classifying 75% of pass-through income as labor income. For example,
among million-dollar earners, 89.2% are working in the fiscal income
definition and 69.8% are working in the imputed national income
definition. Even among the top 0.1% in the imputed national income
series, 59.3% are working.
They explain their reasoning for using two estimates:
Fiscal income
has the advantage of being directly observed on personal income tax
returns, but has the disadvantage of understating top capital income
because some components do not appear on personal tax returns. Imputed
national income has the advantage that it sums to national income, but
has the disadvantage of relying on imputation assumptions. Retained
earnings ($649bn in 2014) are a substantial part of national income but
do not appear on personal tax returns and thus are not in fiscal income.
PSZ allocate the household share of aggregate retained earnings to
individuals in proportion to the sum of the individual’s observed
dividends and realized capital gains. However, published IRS reports
indicate that at least 25% and as much as 75% of realized capital gains
are not from the sale of C-corporate stock and are instead gains from
real estate and other asset sales or carried interest. This fact can
explain how total realized capital gains ($732B in 2014) vastly exceeds
the total household share of retained earnings ($306B in 2014). Realized
capital gains are much larger than dividends and much more concentrated
among top earners. Hence, imputing retained earnings in proportion to
each individual’s sum of dividends and 100% of realized capital gains
may allocate too much retained earnings to top earners and not enough to
lower earners. These competing considerations motivate the presentation
of our findings in both series, likely (in our view) bounding the
truth."