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Kopczuk, Wojciech

Works: 38 works in 253 publications in 1 language and 1,455 library holdings
Genres: History 
Roles: Author
Classifications: HB1, 330.072
Publication Timeline
Publications about Wojciech Kopczuk
Publications by Wojciech Kopczuk
Most widely held works by Wojciech Kopczuk
The optimal elasticity of taxable income by Joel Slemrod( Book )
16 editions published between 1998 and 2000 in English and held by 67 libraries worldwide
The strength of the behavioral response to a tax rate change depends on the environment individuals operate in, and may be manipulated by instruments controlled by the government. We first derive a measure of the social benefit to affecting this elasticity. The paper then examines this effect in the solution to the optimal income taxation problem when such an instrument is available, first in a general model and then in an example when the government chooses the income tax base
The impact of the estate tax on the wealth accumulation and avoidance behavior of donors by Wojciech Kopczuk( Book )
14 editions published in 2000 in English and held by 66 libraries worldwide
Using estate tax return data from 1916 to 1996, we investigate the impact of the estate tax on reported estates, which reflects the impact of the tax on both wealth accumulation and avoidance. An aggregate measure of reported estates is generally negatively correlated with summary measures of the level of estate taxation, holding constant other influences. In pooled cross-sectional analysis that makes use of individual decedent information, the relationship between the concurrent tax rate and the reported estate is fragile and sensitive to the set of instruments that are used to capture exogenous tax rate variation. However, the negative effect of taxes appears to be stronger for those who die at a more advanced age and with a will, both of which are consistent with the theory of how estate taxes affect altruistic individuals. Finally, we find that the tax rate that prevailed at age 45 or ten years before death is more clearly (negatively) associated with reported estates than the tax rate prevailing at death. Future research should concentrate on developing lifetime measures of the effective tax rates and on better measurements of the effective tax rate for married couples
Dying to save taxes : evidence from estate tax returns on the death elasticity by Wojciech Kopczuk( Book )
13 editions published in 2001 in English and held by 61 libraries worldwide
This paper examines data from U.S. federal tax returns to shed light on whether the timing of death is responsive to its tax consequences. We investigate the temporal pattern of deaths around the time of changes in the estate tax system periods when living longer, or dying sooner, could significantly affect estate tax liability. We find some evidence that there is a small death elasticity, although we cannot rule out that what we have uncovered is ex post doctoring of the reported date of death. However, the fact that we find that postponement, rather than acceleration, of death is more likely to occur suggests that this phenomenon is at last partly a real (albeit timing) response to taxation
Why world redistribution fails by Wojciech Kopczuk( Book )
11 editions published in 2002 in English and held by 61 libraries worldwide
An optimal linear world income tax that maximizes a border-neutral social welfare function provides a drastic reduction in world consumption inequality, dropping the Gini coefficient from 0.69 to 0.25. In contrast an optimal decentralized (i.e., within countries) redistribution has miniscule effect on world income inequality. Thus, the traditional public finance concern about the excess burden of redistribution cannot explain why there is so little world redistribution. Actual foreign aid is vastly lower than the transfers under the simulated world income tax, suggesting that countries such as the United States either place a much lower value on the welfare of foreigners or else expect that a very significant fraction of cross-border transfers is wasted. The product of the welfare weight and one minus the share of transfers that are wasted constitutes an implied weight that the United States assigns to foreigners. We calculate that value to be as low as 1/2000 of the value put on the welfare of an American, suggesting that U.S. policy implicitly assumes either that essentially all transfers are wasted or places essentially no value on the welfare of the citizens of the poorest countries
The trick is to live : is the estate tax social security for the rich? by Wojciech Kopczuk( Book )
12 editions published in 2002 in English and held by 60 libraries worldwide
Because estate tax liability usually depends on how long one lives, it implicitly provides annuity income. In the absence of annuity markets, lump-sum estate taxation may be used to achieve the first-best solution for individuals with a sufficiently strong bequest motive. Calculations of the annuity embedded in the U.S. estate tax show that people with $10 million of assets may be effectively receiving more than $100,000 a year financed at actuarially fair rates by their tax payments. According to my calibrations, the insurance effect reduces the marginal cost of funds (MCF) for the estate tax by as much as 30% and the resulting MCF is within the range of estimates for the marginal cost of funds for the income tax
Tax bases, tax rates and the elasticity of reported income by Wojciech Kopczuk( Book )
11 editions published in 2003 in English and held by 50 libraries worldwide
Tax reforms usually change both tax rates and tax bases. Using a panel of income tax returns spanning the two major U.S. tax reforms of the 1980s and a number of smaller tax law changes, I find that the elasticity of income reported on personal income tax returns depends on the available deductions. This highlights that this key behavioral elasticity is not a structural parameter but rather that it can be to some extent controlled by policy makers. The results suggest that base broadening reduces the marginal efficiency cost of taxation. The point estimates indicate that the Tax Reform Act of 1986 reduced the marginal cost of collecting a dollar of tax revenue by 2 cents, with roughly half of this reduction due to the base broadening and the other half due to the tax rate reduction. As a by-product, the analysis in this paper offers a reconciliation of disparate estimates obtained by previous studies of the tax responsiveness of income
To leave or not to leave : the distribution of bequest motives by Wojciech Kopczuk( Book )
15 editions published between 2004 and 2005 in English and held by 45 libraries worldwide
In this paper, we examine the effect of observed and unobserved heterogeneity in the desire to die with positive net worth. Using a structural life-cycle model nested in a switching regression with unknown sample separation, we find that roughly three-fourths of the elderly single population has a bequest motive that may or may not have an appreciable effect on spending depending on the level of resources. Both the presence and the magnitude of the bequest motive are statistically and economically significant. On average, households with a bequest motive spend about 25 percent less on consumption expenditures. We conclude that, among the elderly single households in our sample, about four-fifths of their net wealth will be bequeathed and approximately half of this is due to a bequest motive
Top wealth shares in the United States, 1916-2000 : evidence from estate tax returns by Wojciech Kopczuk( Book )
10 editions published in 2004 in English and held by 42 libraries worldwide
This paper presents new homogeneous series on top wealth shares from 1916 to 2000 in the United States using estate tax return data. Top wealth shares were very high at the beginning of the period but have been hit sharply by the Great Depression, the New Deal, and World War II shocks. Those shocks have had permanent effects. Following a decline in the 1970s, top wealth shares recovered in the early 1980s, but they are still much lower in 2000 than in the early decades of the century. Most of the changes we document are concentrated among the very top wealth holders with much smaller movements for groups below the top 0.1%. Consistent with the Survey of Consumer Finances results, top wealth shares estimated from Estate Tax Returns display no significant increase since 1995. Evidence from the Forbes 400 richest Americans suggests that only the super-rich have experienced significant gains relative to the average over the last decade. Our results are consistent with the decreased importance of capital income at the top of the income distribution documented by Piketty and Saez (2003) and suggest that the rentier class of the early century is not yet reconstituted. The most plausible explanations for the facts are perhaps the development of progressive income and estate taxation which has dramatically impaired the ability of large wealth holders to maintain their fortunes, and the democratization of stock ownership which now spreads stock market gains and losses much more widely than in the past
Electronic filing, tax preparers, and participation in the earned income tax credit by Wojciech Kopczuk( Book )
10 editions published in 2005 in English and held by 36 libraries worldwide
In 2002 more than 18 million low-income individual taxpayers received the Earned Income Tax Credit (EITC). Despite its size, non-participation in this program is a concern and substantial effort is devoted by the IRS, local governments and many non-profits to address it. Most of the tax returns for EITC recipients are filed electronically by paid tax preparers who often charge significant fees for their services. Using variation across states in the introduction of state electronic filing programs, we show that the introduction of electronic filing had a significant effect on participation in the EITC. Our results are robust to accounting for other welfare, EITC and IRS reforms introduced during the same period. We suggest that this effect is due to the impact that electronic filing opportunities had on the tax preparation industry, therefore providing an example of how a market-based approach can be effective in addressing the problem of program non-participation
Denial of death and economic behavior : Wojciech Kopczuk, Joel Slemrod by Wojciech Kopczuk( Book )
10 editions published in 2005 in English and held by 34 libraries worldwide
We model denial of death and its effect on economic behavior. Attempts to reduce death anxiety and the possibility of denial of mortality-relevant information interact with intertemporal choices and may lead to time-inconsistent behavior and other "behavioral" phenomena. In the model, repression of signals of mortality leads to underconsumption for unsophisticated individuals, but forward-sophisticated individuals may over-consume in anticipation of future denial and may seek ways to commit to act according to one's mortality prospects as currently perceived. We show that the mere possibility of engaging in this kind of denial leads to time-inconsistent but efficient behavior. Refusal to face up to the reality of death may help explain a wide range of empirical phenomena, including the underutilization of tax-advanced inter vivos gifts and inadequate purchase of life insurance
Bequest and tax planning : evidence from estate tax returns by Wojciech Kopczuk( Book )
10 editions published in 2006 in English and held by 29 libraries worldwide
I study bequest and wealth accumulation behavior of the wealthy (subject to the estate tax) shortly before death. The onset of a terminal illness leads to a very significant reduction in the value of estates reported on tax returns - 15 to 20% with illness lasting "months to years" and about 5 to 10% in case of illness reported as lasting "days to weeks". I provide evidence suggesting that these findings cannot be explained by real shocks to net worth such as due to medical expenses or lost income, but instead reflect "deathbed" estate planning. The results suggest that wealthy individuals actively care about disposition of their estates, but that this preference is dominated by the desire to hold on to their wealth while alive
Women, wealth and mobility by Lena Edlund( Book )
9 editions published in 2007 in English and held by 28 libraries worldwide
"The extent of and changes in inter-generational mobility of wealth are central to understanding dynamics of wealth inequality but hard to measure. Using estate tax returns data, we observe that the share of women among the very wealthy (top 0.01%) in the United States peaked in the late 1960s, reaching almost 50%. Three decades on, women's share had declined to one third, a return to pre-war levels. We argue that this pattern mirrors the relative importance of inherited vs. self-made wealth in the economy and thus the gender-composition of the wealthiest may serve as a proxy for inter-generational wealth mobility. This proxy for "dynastic wealth'' suggests that wealth mobility in the past century decreased until the 1970s and rose thereafter, a pattern consistent with technological change driving long term trends in income inequality and mobility. Greater wealth mobility in recent decades is also consistent with the simultaneous rise in top income shares and relatively stable wealth concentration."--Abstract
Uncovering the American dream : inequality and mobility in social security earnings data since 1937 by Wojciech Kopczuk( Book )
7 editions published in 2007 in English and held by 26 libraries worldwide
This paper uses Social Security Administration longitudinal earnings micro data since 1937 to analyze the evolution of inequality and mobility in the United States. Earnings inequality follows a U-shape pattern, decreasing sharply up to 1953 and increasing steadily afterwards. We find that short-term and long-term (rank based) mobility among all workers has been quite stable since 1950 (after a temporary surge during World War II). Therefore, the pattern of annual earnings inequality is very close to the pattern of inequality of longer term earnings. Mobility at the top has also been very stable and has not mitigated the dramatic increase in annual earnings concentration since the 1970s. However, the stability in long-term earnings mobility among all workers masks substantial heterogeneity across demographic groups. The decrease in the gender earnings gap and the substantial increase in upward mobility over a career for women is the driving force behind the relative stability of overall mobility measures which mask declines in mobility among men. In contrast, overall inequality and mobility patterns are not significantly influenced by the changing size and structure of immigration nor by changes in the black/white earnings gaps
Transfer program complexity and the take up of social benefits by Henrik Jacobsen Kleven( Book )
9 editions published in 2008 in English and held by 17 libraries worldwide
This paper models complexity in social programs as a byproduct of efforts to screen between deserving and undeserving applicants. While a more rigorous screening technology may have desirable effects on targeting efficiency, the associated complexity introduces transaction costs into the application process and may induce incomplete take up. The paper integrates the study of take up with the study of classification errors of type I and type II, and argue that incomplete take up can be seen as a form of type I error. We consider a government interested in ensuring a minimum income level for as many deserving individuals as possible, and characterize optimal programs when policy makers can choose the rigor of screening (and associated complexity) along with a benefit level and an eligibility criterion. It is shown that optimal program parameters reflect a trade-off at the margin between type I errors (including non-takeup) and type II errors. Optimal programs that are not universal always feature a high degree of complexity. Although it is generally possible to eliminate take up by the undeserving (type II errors), policies usually involve eligibility criteria that make them eligible and rely on complexity to restrict their participation. Even though the government is interested only in ensuring a minimum benefit level, the optimal policy may feature benefits that are higher than this target minimum. This is because benefits generically screen better than either eligibility criteria or complexity. We present numerical simulations on comparative statics with respect to budget size, ability distribution, complexity costs, and stigma. Our results are discussed in light of empirical findings for public programs in the United States
Economics of estate taxation : a brief review of theory and evidence by Wojciech Kopczuk( Book )
8 editions published in 2010 in English and held by 11 libraries worldwide
This paper provides a non-technical overview of the economic arguments related to the desirability of transfer taxation and a summary of empirical evidence surrounding these issues. Understanding optimal transfer taxation throughout the distribution requires understanding the nature of a bequest motive, a topic on which there is little consensus. However, I argue that progress still can be made on the question of desirability and optimal level of estate taxation at the top of the distribution, because interpersonal externalities implied by the presence of bequest motive are irrelevant from the welfare point of view when the focus is on the wealthy. I also examine the role of negative externalities from wealth concentration in providing justification for considering this type of taxation
Mansion tax : the effect of transfer taxes on the residential real estate market by Wojciech Kopczuk( Book )
9 editions published between 2014 and 2015 in English and held by 8 libraries worldwide
Houses and apartments sold in New York and New Jersey at prices above $1 million are subject to the so-called 1% "mansion tax" imposed on the full value of the transaction. This policy generates a discontinuity (a "notch") in the overall tax liability. We rely on this and other discontinuities to analyze implications of transfer taxes in the real estate market. Using administrative records of property sales, we find robust evidence of substantial bunching and show that the incidence of this tax for transactions local to the discontinuity falls on sellers, may exceed the value of the tax, and is not explained by tax evasion (although supply-side quality adjustments may play a role). Above the notch, the volume of missing transactions exceeds those bunching below the notch. Interpreting our results in the context of an equilibrium bargaining model, we conclude that the market unravels in the neighborhood of the notch: its presence provides strong incentive for buyers and sellers in the proximity of the threshold not to transact. This effect, the identification and recognition of which is novel to this paper, is above and beyond the standard extensive margin response. When present, unraveling affects interpretation and estimation of bunching estimates. Finally, we show that the presence of the tax affects how the market operates away from the threshold -- taxation increases price reductions during the search process and in the bargaining stage and weakens the relationship between listing and sale prices. We interpret these results as demonstrating that taxation affects the ultimate allocation in this search market
Incentive effects of inheritances and optimal estate taxation by Wojciech Kopczuk( Book )
5 editions published in 2013 in English and held by 8 libraries worldwide
I consider nonlinear taxation of income and bequests with a joy-of-giving bequest motive and explicitly characterize the estate tax rate structure that maximizes social planner's welfare function. The solution trades off correction of externality from giving and discouraging effort of children due to income effect generated by bequests. The analysis shows that optimality of a positive tax on bequests in this context rests on the strength of the effect of bequests on behavior of future generations, and suggests that inheritance rather than estate tax is better suited to implement the corresponding policy -- National Bureau of Economic Research web site
Taxation of intergenerational transfers and wealth by Wojciech Kopczuk( Book )
6 editions published in 2012 in English and held by 8 libraries worldwide
In this chapter, I review empirical and theoretical literature on taxation of intergenerational transfers (estates, bequests, inheritances, inter vivos gifts) and wealth. The main message may be summarized as follows. Empirical evidence on bequest motivations and responses to estate taxation is spotty and much remains be done, but what we know points in the direction of (1) mixed motives (2) heterogeneity of preferences and (3) importance of retaining control over wealth. These patterns are important for normative analysis of taxation toward the top of the distribution. Theoretical work should further focus on understanding implications of inequality of inherited wealth: the topic that has been neglected in the past, even though it is closely related to - more carefully studied, but arguably much less important in practice - externalities from giving. Potential externalities from wealth accumulation and concentration are yet to be seriously addressed
Are Closely-Held Firms Tax Shelters? by Annette Alstadsæter( Book )
6 editions published in 2013 in English and held by 5 libraries worldwide
In 2004 Norwegian authorities announced a reform introducing dividend taxation for personal (but not corporate) owners to take effect starting in 2006. This change provided incentives to maximize dividends in 2004 and 2005, and to retain earnings in the following years. Using Norwegian registry data that cover the universe of non-publicly traded firms, we find that dividend payments responded very strongly to the anticipated reform, but also that much of the response was compensated by re-injecting shareholder equity in the same firms. On the other hand, following the reform firms began to retain earnings. While all categories of assets grow, the increase in durable assets categories that include equipment, machinery, company cars, planes and boats, is particularly striking. We find that personally owned firms and those that pursued aggressive dividend maximization policy in anticipation of the reform exhibit lower profits and economic activity in its aftermath, but retain earnings and accumulated assets at comparable or faster rate than others. The differential effect on assets is concentrated in financial (a potential substitute for private saving) and durable (a potential substitute for private consumption) asset categories. We interpret these results as indicating both the existence of real tax responses and supportive of the notion that in the presence of dividend taxation closely-held firms partially serve as tax shelters
Do the Laws of Tax Incidence Hold? Point of Collection and the Pass-through of State Diesel Taxes by Wojciech Kopczuk( Book )
5 editions published in 2013 in English and held by 5 libraries worldwide
The canonical theory of taxation holds that the incidence of a tax is independent of the side of the market which is responsible for remitting the tax to the government. However, this prediction does not survive in certain circumstances, for example when the ability to evade taxes differs across economic agents. In this paper, we estimate in the context of state diesel fuel taxes how the incidence of a quantity tax depends on the point of tax collection, where the level of the supply chain responsible for remitting the tax varies across states and over time. Our results indicate that moving the point of tax collection from the retail station to higher in the supply chain substantially raises the pass-through of diesel taxes to the retail price. Furthermore, tax revenues respond positively to collecting taxes from the distributor or prime supplier rather than from the retailer, suggesting that evasion is the likely explanation for the incidence result
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Alternative Names
Wojciech Kopczuk économiste polonais
Wojciech Kopczuk Polish economist
Копчук, Войцех
English (196)
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