cooperative and noncooperative r d in duopoly with spillovers contrary to the usual assumption made in most oligopoly models relations among firms are seldom of a wholly cooperative or noncooperative type in many situations they compete in some fields while they cooperate in others an important example is the case of cooperative research efforts bringing fierce competitors together two types of agreement are observed first r d cooperation can take place at the so called precompetitive stage companies share basic information and efforts in the r d stage but remain rivals in the market place 1 a second type of agreement involves an extended collusion between partners creating common policies at the product level the usual justifications of this extension are the difficulties of protecting intellectual property the idea is then to allow partners who have achieved inventions together to also control together the processes and products which embody the results of their collaboration in order to recuperate jointly their r d investments 2 what could be expected from these types of agreement is a reduction in r d expenditures because of less wasteful duplication and a reduction of total production because of more reprinted from the american economic review 78 5 1133 1137 1988 center for operations research econometrics 1348 louvain la neuve belgium we are grateful to jean

progressive taxation and income inequality in dynamic competitive equilibrium abstract this paper establishes the existence of a non degenerate distribution of income in a simple dynamic economy when agents who are heterogeneous in their rates of impatience face a progressive tax system in this dynamic setting income inequality can vary positively with the degree of tax progressivity moreover the inherent heterogeneity in agents behavior can explain why measures of inequality such as the standard deviation of income or atkinson s gini tend to be dynamically much more sluggish than aggregate measures such as total income finally the adjustment in the degree of inequality resulting from an exogenous change in tax policy may take some time before becoming effective this result also arises from agents asymmetric responses to policy changes

reforming taxes and raising revenue part of the fiscal solution this paper reviews the fiscal outlook in the united states discusses why revenue increases are a critical aspect of any enduring fiscal solution and outlines constructive policies to reform the tax system and simultaneously raise revenues in particular this paper highlights the merits of curtailing income tax expenditures introducing a value added tax and imposing levies on consumption and production of non renewable energy copyright 2011 oxford university press

valuing lost home production of dual earner couples using a life cycle model in which women divide their time between home and market work we establish a link between retirement wealth and the value of forgone home production we use data from the health and retirement study to estimate the model s parameters and adjust the growth rate of gdp to reflect reductions in non market output we find that the value of forgone home production is modest about 25 percent of women s measured earnings

fiscal consolidation and climate policy an overlapping generations perspective abstract this paper examines the distributional and efficiency impacts of public debt consolidation financed through a carbon tax employing a dynamic general equilibrium model with overlapping generations of the u s economy the numerical model features government taxes and spending and a multi sectoral production structure including intermediate production specific detail on the energy sector both in terms of primary energy carriers and energy intensive industries and sector and fuel specific carbon inputs in contrast to revenue neutral carbon tax swaps using the carbon revenue for deficit reduction implies a relaxation of future public budgets as debt repayment results in lower future interest obligations while intergenerational welfare impacts depend importantly on what tax recycling instrument is used we find that combining public debt consolidation with a carbon policy entails the possibility of sustained welfare gains for future generations if social discount rates are sufficiently low or if social preferences exhibit a large aversion with respect to intergenerational inequality combining fiscal consolidation and climate policy may offer the chance for societal gains even without considering potential benefits from averted climate change

can progressive taxation account for cross country variation in labor supply abstract the difference between average hours worked in the us and average hours worked in continental european countries has been increasing since the early 1970s to explain this phenomenon this paper develops an endogenous growth model with two key properties agents are heterogeneous in their rates of time preference and labor skills and the model incorporates progressive income taxes the model is calibrated to us and german data for the periods 1971 1974 and 1986 1989 our findings suggest that the degree of progressivity is a major factor in explaining the patterns of the us and german labor supply over time predictions of the model also match the distributional trends in both countries during this time period

unfunded liabilities and uncertain fiscal financing we develop a rational expectations framework to study the consequences of alternative means to resolve the unfunded liabilities problem the projected exponential growth in federal social security medicare and medicaid spending with no known plan for financing the transfers resolution requires specifying a probability distribution for how and when monetary and fiscal policies will change as the economy evolves through the 21st century beliefs based on that distribution determine the existence of and the nature of equilibrium we consider policies that in expectation combine reaching a fiscal limit some distorting taxation modest inflation and some reneging on the government s promised transfers in the equilibrium inflation targeting monetary policy and debt targeting tax policy cannot anchor expectations on those target variables expectational effects are always present but need not have large impacts on inflation and interest rates in the short and medium runs in the economy s stationary distribution the capital stock may grow or shrink and substantial probability falls on little or no reneging

gradual tax reforms if you like it you can keep it abstract one of the key practical challenges facing by tax reforms are their short run welfare consequences in this paper i focus on a consumption based tax reform for which despite long run welfare gains it generates welfare for some groups such as retirees or the working poor falls during transition between steady states using a life cycle model with heterogeneous households i show how to devise a transition path from the current u s federal tax system to a consumption based tax system that improves the welfare of current as well as future generations in a nutshell all households alive at the time of the policy change can choose when they want to switch to the new tax system or whether they want to switch at all i find that implementing a tax reform with this feature improves the welfare of 95 of population in the short run compared to less than a quarter of population in the conventional case with no choice it takes about twenty years for half of the population to pay their taxes under the new tax code

an empirical model of labor supply in a life cycle setting this paper formulates and estimates a structural intertemporal model of labor supply using theoretical characterizations derived from an economic model of lifetime behavior a two step empirical analysis yields estimates of intertemporal and uncompensated substitution effects which provide the information needed to predict the response of hours of work to life cycle wage growth and shifts in the lifetime wage path

long memory in stock market trading volume this article examines consistent estimation of the long memory parameters of stock market trading volume and volatility the analysis is carried out in the frequency domain by tapering the data instead of detrending them the main theoretical contribution of the article is to prove a central limit theorem for a multivariate two step estimator of the memory parameters of a nonstationary vector process using robust semiparametric procedures the long memory properties of trading volume for the 30 stocks in the dow jones industrial average index are analyzed two empirical results are found first there is strong evidence that stock market trading volume exhibits long memory second although it is found that volatility and volume exhibit the same degree of long memory for most of the stocks there is no evidence that both processes share the same long memory component

taxation and household labor supply we evaluate reforms to the u s tax system in a life cycle setup with heterogeneous married and single households and with an operative extensive margin in labor supply we restrict our model with observations on gender and skill premia labor force participation of married females across skill groups children and the structure of marital sorting we concentrate on two revenue neutral tax reforms a proportional income tax and a reform in which married individuals flle taxes separately separate flling our flndings indicate that tax reforms are accompanied by large increases in labor supply that difier across demographic groups with the bulk of the increase coming from married females under a proportional income tax reform married females account for more than 50 of the changes in hours across steady states while under separate flling reform married females account for all the change in hours

tax progressivity and tax incidence of the rich and the poor with the labor supply being flexible a revenue neutral increase in the tax progressivity decreases the tax incidence of the rich and increases the tax incidence of the poor if the tax scheme is highly progressive

tax policy and the financing of innovation we study tax policy in a schumpeterian growth model with asymmetric information in the financing of innovation investors cannot a priori distinguish between more or less talented entrepreneurs net worth allows talented entrepreneurs to self invest and avoid being pooled with less talented entrepreneurs in the credit market increasing net worth boosts innovation even when financed through higher profit taxes taxing consumption effectively raises net worth and subsidizes profits simultaneously sufficiently taxing consumption implements the social optimum free of adverse selection if forced to tax consumption less the government implements a second best allocation with adverse selection when boosting net worth enough to avoid adverse selection requires taxing profits excessively

the surprising power of age dependent taxes this paper provides a new empirically driven application of the dynamic mirrleesian framework by studying a feasible and potentially powerful tax reform age dependent labour income taxation i show analytically how age dependence improves policy on both the intratemporal and intertemporal margins i use detailed numerical simulations calibrated with data from the u s panel study of income dynamics to generate robust policy implications age dependence 1 lowers marginal taxes on average and especially on high income young workers and 2 lowers average taxes on all young workers relative to older workers when private saving and borrowing are restricted finally i calculate and characterize the welfare gains from age dependence despite its simplicity age dependence generates a welfare gain equal to between 0 6 and 1 5 of aggregate annual consumption and it captures more than 60 of the gain from reform to the dynamic optimal policy the gains are due to substantial increases in both efficiency and equity when age dependence is restricted to be pareto improving the welfare gain is nearly as large

existence and uniqueness of steady state equilibrium in a two sector overlapping generations model abstract in his seminal paper galor a two sector overlapping generations model a global characterization of the dynamical system econometrica 60 1992 1351 1386 establishes conditions for the existence of equilibrium in the two sector overlapping generations olg model although appealing theoretically these conditions are implicit and not easy to apply this paper develops new theorems on the existence and uniqueness of steady state equilibrium in the two sector olg model we provide explicit conditions on the utility and production functions for the existence and uniqueness of equilibrium with which one only needs to check the derivatives of the production and utility functions and their interactions without requiring solving for the savings function and its derivatives we present detailed steps to check the existence and uniqueness of equilibrium and provide illustrative examples

mitigating america s demographic dilemma by pre funding social security abstract financing social security benefits at current levels implies significant increases in payroll taxes within the next 20 years under current us demographic developments using a general equilibrium overlapping generations model with realistic patterns of fertility and lifespan extension this study shows that future generations would be harmed during the demographic transition due to rising payroll taxes which crowd out savings and slow real wage growth below the rate of technological progress a faster rate of technological progress would mitigate only some of the payroll tax increase and its economic consequences but could not overcome them addressing the financing problem by reducing social security benefits as needed or by raising the eligibility age for benefits imposes major welfare losses on current or near term retirees by contrast a pre funding of social security financed with consumption taxes more evenly spreads the welfare losses across generations and it helps future generations especially the poor by stimulating capital formation

marginal welfare costs of taxation with human and physical capital i introduction marginal welfare cost of taxation is the amount by which the social cost of an additional tax dollar differs from 1 because of distortionary taxation browning and johnson 1984 stuart 1984 browning 1987 ballard 1988 and allgood and snow 1998 use static models of the u s economy in which labor supplies adjust but the stocks of human and physical capital are fixed to calculate estimates of this welfare cost relevant to cost benefit analysis the studies by lucas 1990 and perroni 1995 incorporate human and physical capital into calculations of excess burden for the purpose of comparing alternative tax systems but do not address the welfare costs of marginal tax and spending reforms ballard et al 1985 and judd 1987 provide estimates of welfare cost using models that allow the stock of physical capital to change in response to marginal reforms but the stock of human capital is exogenous in these studies however judd 2001 argues that there is ample evidence indicating that human capital investment decisions have a significant effect on the cost of altering the tax system which suggests that these decisions could also have an important influence on marginal welfare cost in this article we present estimates of welfare costs for marginal reforms to government tax and spending policies when labor supply saving and education decisions are all endogenous we focus our analysis on marginal reforms because as skinner and slemrod 1985 observe most policy reforms enacted do not involve replacing one tax or spending system with another but instead typically entail marginal adjustments in tax laws and government appropriations using a perfect foresight overlapping generations model with a three period life cycle we derive analytical expressions for the changes in labor supply saving and education and use them to calculate marginal welfare cost as shown by auerbach et al 1983 in overlapping generations models steady state welfare comparisons of alternative tax policies are biased unless households are compensated for intergenerational redistribution along the transition path to arrive at our steady state estimates of welfare costs we adapt the compensation method introduced by gravelle 1991 for analyzing fundamental tax reforms to the context of incremental tax and spending reforms in a static one consumer model triest 1990 has shown that marginal welfare cost mwc is positive solely because of tax leakage the decline in tax revenue caused by reductions in the tax base we extend this insight to an intertemporal context that incorporates tax leakage arising from changes in both human and physical capital investment we evaluate three sets of reforms first a revenue neutral reduction in the tax on capital income funded by a higher tax on labor income second spending on a public good financed by either a higher tax on labor or interest income third a per capita lump sum transfer or demogrant also funded by either a higher tax on labor or interest income we find that marginal welfare costs are uniformly lower in the dynamic model where investment decisions are endogenous than in the static model where investment decisions are fixed and that the majority of the difference between the dynamic and static estimates is attributable to human capital decisions the principal reason is that a reallocation of time between labor hours and human capital investment has opposing and potentially offsetting effects on effective labor supply as a result labor supply responds less elastically in the dynamic model and changes in labor supply are the main source of tax leakage because wage taxation is the main source of tax revenue we also find that shifting marginal financing from capital to labor results in a lower welfare cost the reason being that such a change encourages saving which increases wage rates and stimulates labor supply leading to a reduction in marginal welfare costs

earnings test non actuarial adjustments and flexible retirement abstract in response to the challenges of increasing longevity many countries have introduced flexibility reforms for their public pension systems a key measure of these reforms is the abolishment of earnings tests it is claimed that these reforms increase labor supply and therefore the financial sustainability of pension systems we build a simulation model to show that abolishing an earnings test may indeed create more labor supply but simultaneously reduce the average claiming age when adjustments remain less than actuarial as is the case in most european pension systems flexibility reforms may therefore worsen rather than improve the sustainability of public pension systems

optimal residual based tests for fractional cointegration and exchange rate dynamics a lagrange multiplier test of the null hypothesis of cointegration in fractionally cointegrated models is proposed the test statistic uses fully modified residuals to cancel the endogeneity and serial correlation biases and standard asymptotic properties apply under the null and under local alternatives with iid gaussian errors the asymptotic gaussian power envelope of all unbiased tests is achieved by the one sided two sided test the finite sample properties are illustrated by a monte carlo study in an application to the dynamics among exchange rates for seven major currencies against the u s dollar mixed evidence of the existence of a cointegrating relation is found

the effect of long memory in volatility on stock market fluctuations abstract recent empirical evidence demonstrates the presence of an important long memory component in realized asset return volatility we specify and estimate multivariate models for the joint dynamics of stock returns and volatility that allow for long memory in volatility without imposing this property on returns asset pricing theory imposes testable cross equation restrictions on the system that are not rejected in our preferred specifications which include a strong financial leverage effect we show that the impact of volatility shocks on stock prices is small and short lived in spite of a positive risk return tradeoff and long memory in volatility

growth effects of flat rate taxes recent estimates of the potential growth effects of tax reform vary wildly ranging from zero to eight percentage points using an endogenous growth model we assess which model features and parameter values are important for determining the quantitative impact of tax reform we find that the critical parameters are factor shares depreciation rates the elasticity of intertemporal substitution and the elasticity of labor supply the elasticities of substitution in production on the other hand are relatively unimportant the quantitative estimates in several recent papers are compared with each other and with some of the evidence from u s experience we find that robert lucas s conclusion that tax reform would have little or no effect on the u s growth rate is theoretically robust and consistent with the evidence

economic effects of fundamental tax reform brookings institution the tax system profoundly affects countless aspects of private behavior it is a powerful policy influence on the distribution of income and it is the one aspect of government that almost every citizen cannot avoid with tax reform high on the political agenda this book brings together studies of leading tax economists and lawyers to assess the various reform proposals and examine the effects of tax reform in several distinct areas together these studies and comments on them present a balanced evaluation of professional opinion on the issues that will be critical in the tax reform debate the book addresses annual and lifetime distributional effects saving investment transitional problems simplification home ownership and housing prices charitable groups international taxation financial intermediaries and insurance labor supply and health insurance

endogenous trading volume and momentum in stock return volatility this article examines the ability of volume data to shed light on the source of persistence in stock return volatility a mixture model in which a latent common factor restricts the joint density of volume and returns is used to relax the assumption of exogenous volume used in previous studies we use a point in time signal extraction procedure to identify this latent process and a calibrated simulation to conduct analysis of the viability of the model to explain important properties of the data using daily returns and volume on individual stocks our procedure cannot accommodate serial dependence in squared returns

the effects of progressive taxation on labor supply when hours and wages are jointly determined this paper extends a standard intertemporal labor supply model to account for progressive taxation as well as the joint determination of hourly wages and hours worked we show that these two factors can have implications for both estimating labor supply elasticities as well as for using these elasticities in tax analysis failure to account for wage hours ties and progressive taxation may cause the hours response to marginal tax rate changes to be understated by 5 to 30 percent for men

tax deferred saving accounts heterogeneity and policy reforms abstract tax deferred saving accounts tda are systematically used in many countries in the united states households access to tda exhibits substantial heterogeneity 401 k has a higher contribution limit than ira but only 50 of workers are eligibility for it i developed an overlapping generations model that captures the tax benefits of tda and the heterogeneity in 401 k eligibility to investigate the quantitative impacts of tda on the aggregate economy and their implications on policy reforms experiment results show that ira already provides sufficient tax benefits for most households the effects of providing universal 401 k are relatively insignificant because households who can benefit from 401 k already have access to it on the other hand raising the tda contribution limit allows high income households to increase their use of tda and results in stronger effects on the economy when households use of tda is considered the u s income tax system is less distortionary and the welfare gain from a consumption tax reform is reduced by more than half

social security and individual welfare precautionary saving borrowing constraints and the payroll tax this paper examines the impact of social security on national saving and individual welfare in the presence of realistic capital market imperfections market failure in the private provision of annuities and restrictions on borrowing against anticipated future wages the introduction of social security increases lifetime welfare and reduces national saving if borrowing restrictions are absent however the increase in individual welfare is reduced and in some cases eliminated when borrowing constraints are taken into consideration the substantial difference suggests the importance of reexamining the proportional payroll tax finance of social security copyright 1987 by american economic association

public education reform community or national funding of education abstract i use a political economy model of public funding of education to evaluate the welfare implications of a move from a community to a nation wide funding policy broadening the scope of education finance has intragenerational redistribution effects as well as intergenerational effects previous studies have emphasized the intragenerational redistribution effects of moving from local to state financed systems while holding factor prices fixed the model in this paper includes a social security system and allows factor prices to vary endogenously i examine the welfare effects of broadening the scope of financing from a community to a nation wide system and find that there are very large welfare gains as voters internalize the effect of the education policy on both factor prices and social security benefits i also focus on the intergenerational distributional effects finding that significant welfare gains occur despite the displacement of the median voter to an older agent that cares less about children s well being

on the consequences of demographic change for rates of returns to capital and the distribution of wealth and welfare in the industrialized world the population is aging over time reducing the fraction of the population in working age consequently labor is expected to be scarce relative to capital with an ensuing decline in the real return on capital this paper uses demographic projections together with a large scale multi country overlapping generations model with uninsurable idiosyncratic uncertainty to quantify the distributional and welfare consequences of these changes in factor prices induced by the demographic transition in our model capital can freely flow between different regions in the oecd the u s the eu and the rest of the oecd thus international capital flows may in principle mitigate the decline in rates of returns one would expect in the u s if it were a closed economy we find exactly the opposite in the u s as an open economy rates of return are predicted to decline by 86 basis points between 2005 and 2080 if the u s were a closed economy this decline would amount to only 78 basis points this result is due to the fact that other regions in the oecd will age even more rapidly therefore the u s is importing the more severe aging problem from these regions especially europe a similar conclusion is reached if we let capital flow freely between the oecd and the rest of the world row while row currently has a younger population structure it is predicted to age even more severely in the next decades giving rise to an even more pronounced decline in world rates of return to capital in order to evaluate the welfare consequences of the demographic transition we ask the following hypothetical question suppose a household economically born in 2005 would live through the economic transition with changing factor prices induced by the demographic change but keeping her own survival probabilities constant at their 2005 values how would its welfare have changed relative to a situation without a demographic transition we find that households experience significant welfare losses due to the demographic transition in the order of 2 5 of consumption depending on their initial productivity level and the design of the pension system these losses are mainly due to the fact that lower future returns to capital make it harder for households to save for retirement on the other hand if the oecd suddenly opens up to row in 2005 and row has higher returns to capital before the world capital market integration then these losses are reduced to 1 5 2 5

optimal fiscal policy with consumption taxation we characterise optimal fiscal policies in a general equilibrium model with monopolistic competition and endogenous public spending the government can tax consumption as alternative to labour income taxes consumption taxation acts as indirect taxation of prots intratemporal gains of taxing consumption and enables the policy maker to manage the burden of public debt more efficiently intertemporal gains of taxing consumption we show analytically that these two gains imply that the optimal share of government spending is higher under consumption taxation than with labour income taxation then we quantify numerically each of these gains by calibrating the model on the us economy

social security reform and investment in education is there scope for a pareto improvement we propose a pareto improving policy which reduces the overall wage tax burden in an economy with intergenerational trade in a fixed factor of production here labelled as land we analyse a second best environment in which the government cannot resort to non distortionary land taxes reducing the social security contribution rate encourages investment in human capital future efficiency gains accruing to complementary land are capitalized in its value the capital gains may compensate land owning pensioners for reduced benefits we also explain why the unfunded pension system may have lost its appeal even for pensioners after its introduction

social security universal versus earnings dependent benefits i compare the welfare implications of bismarckian earnings dependent benefits and beveridgean universal benefits social security systems agents are better off with a beveridgean system than with a comparable bismarckian system in an environment with intragenerational homogeneity the latter results in a larger decrease in net wages with intragenerational skill heterogeneity most agents benefit from the more redistributive beveridgean system when agents vote for the replacement rates with intragenerational homogeneity the resulting bismarckian system is larger than the beveridgean system with intragenerational skill heterogeneity the beveridgean system is larger overall agents are worse off with the larger system

horizontal concentration and european merger policy in the second section of this policy paper the main theoretical arguments concerning the costs and benefits of horizontal mergers as a way of modifying market conditions are identified as well as the exploration of some indicators that could be used to evaluate the probability of these costs and benefits in a european context

marginal tax rates and income inequality in a life cycle model in this paper we perform computational counterfactual experiments to examine the quantitative impact of marginal tax rates on the distribution of income our methodology builds on previous simulation models developed by auerbach and kotlikoff and fullerton and rogers and uses an algorithm that allows us to examine marginal tax rate structures in their literal form we find that distortions associated with particular marginal tax rate structures have sizable effects on income inequality in a reasonably quantified life cycle setting in our baseline experiments the change in steady state income inequality under 1989 u s income tax rates vis a vis 1984 rates is about half as large as the change actually seen in the data over those two years when measured in terms of a monetary metric derived from gini coefficients

deadweight costs and the size of government abstract we provide a model for analyzing effects of the tax system and spending programs on the determination of government spending and taxpayer welfare an improvement in the efficiency of either taxes or spending would reduce political pressure for suppressing the growth of government and thereby increase total tax revenue and spending we demonstrate the similarity of the political responses to revenue shocks spending shocks changes in tax efficiency and changes in spending program efficiency empirical analysis of oil shocks intergovernmental grants and other autonomous changes in taxes or spending indicates that cause and effect is not only from spending to tax structures

stock prices and volume the authors undertake a comprehensive investigation of price and volume co movement using daily new york stock exchange data from 1928 to 1987 they adjust the data to take into account well known calendar effects and long run trends to describe the process they use a seminonparametric estimate of the joint density of current price change and volume conditional on past price changes and volume four empirical regularities are found 1 positive correlation between conditional volatility and volume 2 large price movements are followed by high volume 3 conditioning on lagged volume substantially attenuates the leverage effect and 4 after conditioning on lagged volume there is a positive risk return relation article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

population aging social security and fiscal limits abstract we use an overlapping generations olg life cycle model with distortionary taxation on labor and capital to derive a threshold dependency ratio i e a point in the cross section distribution of the population beyond which tax revenues can no longer sustain the planned level of transfers to retirees we quantify the level of the threshold the distance of the economy from the threshold and the probability of reaching the threshold at some point in the future the model is calibrated on the united states and fourteen european countries which have dependency ratios among the highest in the world we examine the effects on the threshold and welfare of a number of policies often advocated to improve the sustainability of pension systems new tax data on dynamic laffer effects are provided

order aggressiveness pre trade transparency and long memory in an order driven market abstract recent empirical research has documented that the state of the limit order book influences stock investors strategies investors place more aggressive orders when the same side of the order book is thicker and less aggressive orders when it is thinner we conjecture and demonstrate that this behavior is related to long memories of trading volume volatility and order signs in stock markets we investigate our conjecture in two types of artificial stock markets a transparent market in which agents observe all limit orders on both sides of the book and order volumes at those prices before they trade and a less transparent market in which agents observe only the best five bid and ask quotes with the depth available at these limit prices the first market structure resembles certain actual stock exchanges in the level of pre trade transparency such as the australian stock exchange nyse openbook and the london stock exchange whereas the second market structure is consistent with stock exchanges such as euronext paris the toronto stock exchange the tokyo stock exchange and hong kong exchanges and clearing we demonstrate that our long memory results are robust with different levels of pre trade transparency implying that the strategy constructed by the state of the order book is key for explaining long memories in many actual stock exchanges

competition cooperation and mergers economic and policy issues abstract this paper contrasts two types of european community competition policies with respect to joint ventures namely concentrative joint ventures ccjv which fall under the merger control regulation and cooperative joint ventures cpjv which fall under article 85 1 the contrast occurs at different levels procedural jurisdictional and substantive it provides firms with bargains and trade off opportunities for the choice of the more convenient jurisdiction for their transactions the paper presents a model illustrating how these bargains and trade offs can operate in the context of an endogenous choice between a ccjv and a cpjv

the role of intergenerational transfers in aggregate capital accumulation this paper uses historical u s data to directly estimate the contribution of intergenerational transfers to aggregate capital accumulation the evidence presented indicates that intergenerational transfers account for the vast majority of aggregate u s capital formation only a negligible fraction of actual capital accumulation can be traced to life cycle or hump savings a major difference between this study and previous investigations of this issue is the use of more accurate longitudinal age earnings and age consumption profiles these profiles are simply too flat to generate substantial life cycle savings this paper suggests the importance of and need for substantially greater research and data collection on intergenerational transfers life cycle models of savings that emphasize savings for retirement as the dominant form of capital accumulation should give way to models that illuminate the determinants of intergenerational transfers

understanding the fisher equation it is argued that univariate long memory estimates based on ex post data tend to underestimate the persistence of ex ante variables and hence that of the ex post variables themselves because of the presence of unanticipated shocks whose short run volatility masks the degree of long range dependence in the data empirical estimates of long range dependence in the fisher equation are shown to manifest this problem and lead to an apparent imbalance in the memory characteristics of the variables in the fisher equation evidence in support of this typical underestimation is provided by results obtained with inflation forecast survey data and by direct calculation of the finite sample biases to address the problem of bias the paper introduces a bivariate exact whittle bew estimator that explicitly allows for the presence of short memory noise in the data the new procedure enhances the empirical capacity to separate low frequency behaviour from high frequency fluctuations and it produces estimates of long range dependence that are much less biased when there is noise contaminated data empirical estimates from the bew method suggest that the three fisher variables are integrated of the same order with memory parameter in the range 0 75 1 since the integration orders are balanced the ex ante real rate has the same degree of persistence as expected inflation thereby furnishing evidence against the existence of a fractional cointegrating relation among the fisher variables and correspondingly showing little support for a long run form of fisher hypothesis copyright 2004 john wiley sons ltd

speculative behavior and the dynamics of interacting stock markets abstract we develop a simple agent based financial market model in which heterogeneous speculators apply technical and fundamental analysis to trade in two different stock markets speculators strategy market selections are repeated at each time step and depend on predisposition effects herding behavior and market circumstances simulations reveal that our model is able to explain a number of nontrivial statistical properties of and between international stock markets including bubbles and crashes fat tailed return distributions volatility clustering persistent trading volume coevolving stock prices and cross correlated volatilities against this background our model may be deemed to have been validated

social security reform and intertemporal smoothing abstract this paper examines the welfare and distributional impact of switching from a defined benefit pension system like social security to a defined contribution system of personal retirement accounts pras while such a switch would do away with the transfers that low wage workers receive through social security it would have the benefit of reducing labor supply distortions moreover a particular kind of pra suggested in this paper one that has very low or zero contribution rates early in life substantially enhances life cycle patterns of consumption and labor supply by making more resources available to credit constrained young workers simulations of a life cycle model show that in welfare terms these pras significantly outperform conventional pras because of this enhanced intertemporal smoothing

wealth inequality and altruistic bequests this paper examines the role of bequests and inter vivos gifts in the u s economy considering their importance in determining i the economy s aggregate capital stock ii the distribution of private net worth and iii public policy outcomes and options it focuses on several recent calibrated simulations this abstract was borrowed from another version of this item

merger policy in open economies abstract we extend farrell and shapiro s 1990 analysis of horizontal mergers to the case of an open economy we show how the rules for approving a merger ought to be adapted to account for the fact that the regulator is only concerned with domestic welfare that is ignores the effect of the merger on foreign firms and consumers we also explore the consequences of this externality in a model of a single market which includes consumers and producers of different countries in particular we provide conditions under which a decentralized process of evaluating merger proposals a la farrell shapiro can survive the externality mentioned above

retirement pensions and ageing we study the effects of demographic shocks and changes in the pension system on the macroeconomic performance of an advanced small open economy facing a given world interest rate we construct an overlapping generations model which includes a realistic description of the mortality process individual agents choose their optimal retirement age taking into account the time and age profiles of wages taxes and the public pension system the early retirement provision in most pension systems acts as a trap inducing most workers to retire well before the normal retirement age simulations show that pension reform must be drastic for it to have any effects on the retirement behaviour of workers

intergenerational policy and the measurement of tax incidence we evaluate the ability of generational accounting to assess the potential welfare implications of policy reforms in an intergenerational context policy reforms usually have redistributive efficiency and general equilibrium implications our analysis shows that when the policy reform implies changes in economic efficiency generational accounts can be misleading not only about the magnitude of welfare changes but also about the identity of who wins and who losses in contrast the generational accounts correctly identify welfare changes when the policy reform has only a pure intergenerational redistribution component we illustrate and quantify this issue in the context of widely considered policy reforms substitution of consumption for labor taxation and the increase of retirement age and in a more general context of optimal policy

volatility persistence in stock market by using the unique dataset that consists of all brokers daily trading information i propose an empirical methodology to construct a granger causality financial network to study the relationship between dynamics of volatility and information diffusion in a stock market the financial network i proposed not only provides a new way to describe mutual interconnectedness of brokers in the market but the empirical results also show the financial network density is positively correlated to the realized volatility of the market

growth effects of shifting from a graduated rate tax system to a flat tax i introduction recently the debate concerning fundamental u s tax reform has led to a number of proposals that involve a shift toward a consumption based system 1 one such proposal is the so called flat tax of hall and rabushka 1995 the flat tax would apply a single tax rate to all labor income above a given threshold and to all capital income after fully expensing investment expenditures hall and rabushka 1995 argue that the adoption of their proposal would provide an enormous boost to the u s economy by dramatically improving incentives to engage in productive activities and would save taxpayers hundreds of billions of dollars in compliance and administration costs 2 in this article we develop a quantitative general equilibrium model to assess the growth effects of adopting a flat tax plan similar to the one proposed by hall and rabushka 1995 the model captures many of the features of the current u s tax code such as graduated personal tax rates a standard personal deduction separate tax rates applied to personal and business income double taxation of business income and differential tax treatment of physical and human capital under appropriate parameter settings the model can exhibit either endogenous or exogenous long run growth our choice of functional forms facilitates a closed form solution to the model this allows us to characterize explicitly the economy s transition path following the reform a central issue in the debate over fundamental tax reform is the effect that such a reform would have on economic growth the present analysis builds on the work of stokey and rebelo 1995 who use an endogenous growth framework to identify the key model features and parameters that are important for determining the quantitative impacts of distortionary taxes on long run growth 3 our study differs from theirs and the bulk of the dynamic tax literature in one fundamental respect here we evaluate the growth effects of shifting from a graduatedrate tax system to a flat rate system stokey and rebelo 1995 consider only flat rate systems in which the marginal tax rate is equal to the average tax rate we approximate the graduated rate tax system in the u s economy by an empirical tax rate function that allows the personal tax rate to depend positively on household taxable income in equilibrium household decisions are influenced by both the level and slope of the tax schedule to implement the flat tax reform we shift the parameters of the tax rate function to flatten the marginal tax schedule while maintaining revenue neutrality our methodology treats the hall rabushka proposal as one that in effect moves a representative household from one tax rate schedule to another we view this setup as a reasonable approximation to gauge the growth effects of tax reform at the macro level a more elaborate setup would of course allow for household heterogeneity at a given point in time in this regard we note that caucutt et al 2003 have recently examined the growth effects of graduated rate taxes in a two period overlapping generations model that includes both skilled and unskilled agents in their model a flatter tax schedule increases the fraction of skilled agents in the economy the share of total output devoted to education rises accordingly and the economy s long run growth rate is observed to increase the quantitative implications of their model are difficult to compare to ours however because their two period framework implies a very long time horizon between household decisions about 30 years moreover their model abstracts from many of the features of the u s tax code that we include here in addition to examining the consequences of flattening the marginal tax schedule we investigate the growth effects attributable to other parts of the flat tax proposal such as allowing full investment expensing eliminating the double taxation of business income and increasing the standard personal deduction

opting out of social security abstract the liability facing a pay as you go social security system can be calculated in several ways many conversions including that which took place in chile and in many plans to convert the u s system assume the largest measure known as the shutdown liability this measure pays many workers who have contributed to the public system more money than the public system is actually worth to them thereby placing a larger burden on future generations but other liability measures are hard to implement due to an information asymmetry between the government and individuals about an individual s skill level this paper demonstrates that a very simple reform plan simply letting people opt out of social security generates a truthful revelation equilibrium in which agents reveal private information about their skill levels the new assumed liability measure is much smaller since it more accurately assigns a liability to each individual a smaller liability therefore is passed onto future generations which also generates quicker transition paths it also does a better job protecting the welfare of the initial elderly when general revenue is used to pay for the transition simulation evidence is provided using a large scale lifecycle model with heterogeneous skill levels

welfare implications of switching to consumption taxation abstract we evaluate a reform of the us tax system switching to consumption taxation instead of income taxation we do so in an environment that allows for progressivity of consumption taxes through differential tax rates between basic and non basic consumption goods the consumption tax system that maximizes aggregate welfare involves a 4 subsidy on basic consumption goods and a 68 tax on non basic goods such a tax scheme generates 10 higher output in the long run with a small increase in inequality nonetheless the benchmark with progressive income taxes and mild consumption taxes provides higher welfare on aggregate in the steady state and even more so if we consider the transition

altruism incomplete markets and tax reform abstract we compute the welfare effects of different revenue neutral tax reforms that eliminate capital income taxation in two general equilibrium models calibrated to the u s economy in our dynastic model the reform with the largest welfare gain is the one that eliminates all income taxation and increases the consumption tax to 35 75 of the population alive at the time of the reform benefit from it individuals use intervivos transfers and bequests to redistribute the long run benefits in a pure life cycle economy that lacks this redistribution technology we find that the same reform would benefit only 9 of the population

looking behind the curtain effects from modernization of european union competition policy abstract the european commission issued a proposal for reform of some aspects of communitary competition policy in particular proposes a shift from ex ante control notification system to an ex post control regime of agreements or decisions conflicting with article 81 ex article 85 we highlight the expected effects of this shift on the type of agreements that firms will implement the type of agreements has been taken as exogenous in most analysis of the reform proposal we contend that significant economic effects may result from recognizing the endogeneity of agreements we predict that the proposed reform will result in general in firms implementing less restrictive agreements

labor dependent capital income taxation abstract capital taxation which is negatively correlated with labor supply is proposed this paper uses a life cycle model of heterogeneous agents that face idiosyncratic productivity shocks and shows that the tax scheme provides a strong work incentive when households possess large assets and high productivity later in the life cycle when they otherwise would work less the system also adds to the saving motive of prime age households and raises aggregate capital the increased economic activities expand the tax base and the revenue neutral reform results in a lower average tax rate the negative cross dependence generates a sizable welfare gain in the long run relative to the tax system that treats labor and capital income separately as a tax base the reform however can hurt the elderly during the transition with a high marginal tax on their capital income

consumption retirement and social security evaluating the efficiency of reform that encourages longer careers abstract this paper proposes and analyzes a social security reform in which individuals no longer face the oasi payroll tax after say age 54 or a career of 34 years and their subsequent earnings have no bearing on their benefits we first estimate parameters of a life cycle model our specification includes non separable preferences and possible disability it predicts a consumption expenditure change at retirement we use the magnitude of the expenditure change together with households retirement age decisions to identify key structural parameters the estimated magnitude of the change in consumption expenditure depends importantly on the treatment of consumption by adult children of the household simulations indicate that the reform could increase retirement ages one year or more equivalent variations could average more than 4000 per household and income tax revenues per household could increase by more than 14 000

tax reform and adjustment costs the impact on investment and market value this paper provides an effective tax rate measure that is valid in the presence of adjustment costs and anticipated tax changes and a measure of the impact of tax changes on market value that may be decomposed into the effects on discounted pure profits and normal returns to capital changes in the value of capital may in turn be decomposed further into changes in the marginal value of new capital and changes in the relative value of new and existing capital these new measures are used to evaluate tax changes similar to those introduced by the recent u s tax reform copyright 1989 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

forecasting volatility and volume in the tokyo stock market long memory fractality and regime switching abstract we investigate the predictability of both volatility and volume for a large sample of japanese stocks the particular emphasis of this paper is on assessing the performance of long memory time series models in comparison to their short memory counterparts since long memory models should have a particular advantage over long forecasting horizons we consider predictions of up to 100 days ahead in most respects the long memory models arfima figarch and the recently introduced multifractal model dominate over garch and arma models however while figarch and arfima also have quite a number of cases with dramatic failures of their forecasts the multifractal model does not suffer from this shortcoming and its performance practically always improves upon the naive forecast provided by historical volatility as a somewhat surprising result we also find that for figarch and arfima models pooled estimates i e averages of parameter estimates from a sample of time series give much better results than individually estimated models

consumption taxes and corporate investment consumers nominally pay the consumption tax but theoretical and empirical evidence is mixed on whether corporations partly shoulder this burden thereby affecting corporate investment using a quasi natural experiment we show that consumption taxes decrease investment firms facing more elastic demand decrease investment more strongly because they bear more of the consumption tax we corroborate the validity of our findings using 86 consumption tax changes in a cross country panel we document two mechanisms underlying the investment response reduced firms profitability and lower aggregate consumption importantly the magnitude of the investment response to consumption taxes is similar to that of corporate taxes received september 25 2017 editorial decision august 26 2018 by editor wei jiang authors have furnished an internet appendix which is available on the oxford university press web site next to the link to the final published paper online

reviews of the 2006 economic report of the president the u s tax system in international perspective a review of the 2006 economic report of the president s tax chapter 1 alan j auerbach university of california berkeley and nber april 12 2006 what can you say about a tax reform proposal that died this was the challenge facing the writers of the chapter on taxation for the 2006 economic report of the president hereafter erp one year ago the erp included a chapter entitled options for tax reform that began with the section heading why do we need tax reform and proceeded to lay out the available options that it suggested could make the u s tax system simpler more equitable and efficient in making the case for tax reform that chapter set the stage for the impending work of the president s advisory panel on tax reform while being careful to leave the president s options open until the panel reported the 2005 chapter twice included the phrase the president has not endorsed any specific proposal and this chapter does not advocate the adoption of any particular prototype for reform in case the reader didn t get the message the first two times the chapter concluded with a reminder that the president has not endorsed any specific proposal 2 that was then in november 2005 the tax reform panel issued its report so one might have anticipated a follow up chapter in this year s erp evaluating the panel s i am grateful to rosanne altshuler bill gale kevin hassett and joel slemrod for comments on an earlier draft slemrod 2005 provides a critical evaluation of the 2005 chapter

consumption taxes and redistribution this study considers replacing the current us tax system with only aflat tax con sumption tax showing in contrast to the literature that such a reform leads to a decline in inequality and increase in welfare for the welfare poor the results are obtained from a simple model that identifies the main channels through which the reform affects the economy it is shown also that these novel results depend on the distribution of wealth and earnings and that they hold for the relevant

real and spurious long memory properties of stock market data we test for the presence of long memory in daily stock returns and their squares using a robust semiparametric procedure of lobato and robinson spurious results can be produced by nonstationarity and aggregation we address these problems by analyzing subperiods of returns and using individual stocks the test results show no evidence of long memory in the returns by contrast there is strong evidence in the squared returns

intergenerational transfers and the accumulation of wealth h t ouseholds acquire wealth from two sources they save out of income they have earned and they receive transfers from other people the first method of wealth accumulation goes under the name of life cycle saving in which people save during their working lives and dissave after retirement the second involves either an inter vivos transfer that is a transfer between living people or a bequest a transfer that occurs at the death of the donor while inter vivos transfers and bequests will arise in dynastic models where preferences include a taste for the well being of one s descendents few empirical life cycle models reflect these concerns indeed a sharp debate has arisen over the ability of the simple life cycle model to explain observed wealth accumulation understanding the relative sizes of these sources of wealth accumulation affects a variety of issues for example the effects of government debt social insurance public transfer programs estate taxes and incentives for charitable giving depend to some extent on the magnitude and nature of private saving and transfers of wealth analyses of the inequality of wealth may depend on whether most of wealth is earned or received as transfers appropriate policies for encouraging private saving may look rather different depending on whether most saving is to be consumed later in life or passed along to the next generation finally evidence on transfer patterns relates to more fundamental

the price variability volume relationship on speculative markets this paper concerns the relationship between the variability of the daily price change and the daily volume of trading on the speculative markets our work extends the theory of speculative markets in two ways first we derive from economic theory the joint probability distribution of the price change and the trading volume over any interval of time within the trading day and second we determine how this joint distribution changes as more traders enter or exit from the market the model s parameters are estimated by fiml using daily data from the 90 day t bills futures market the results of the estimation can reconcile a conflict between the price variability volume relationship for this market and the relationship obtained by previous investigators for other speculative markets this paper concerns the relationship between the variability of the daily price change and the volume of trading on speculative markets previous empirical studies 2 3 6 12 14 16 of both futures and equity markets always find a positive association between price variability as measured by the squared price change ap2 and the trading volume 2 there are two explanations for the relationship clark s 2 explanation which is secondary to his effort to explain why the probability distribution of the daily price change is leptokurtic emphasizes randomness in the number of within day transactions in clark s model the daily price change is the sum of a random number of within day price changes the variance of the daily price change is thus a random variable with a mean proportional to the mean number of daily transactions clark argues that the trading volume is related positively to the number of within day transactions and so the trading volume is related positively to the variability of the price change the second explanation is due to epps and epps 6 their model examines the mechanics of within day trading the change in the market price on each within day transaction or market clearing is the average of the changes in all of the traders reservation prices epps and epps assume there is a positive relationship between the extent to which traders disagree when they revise their reservation prices and the absolute value of the change in the market price that is an increase in the extent to which traders disagree is associated with a larger absolute price change the price variability volume relationship arises then because the volume of trading is positively related to the extent to which traders disagree when they revise their reservation prices

consumption vs wage taxation and the capital levy abstract based on a representative consumer framework it has been argued that wage taxation is inferior to consumption taxation this note shows that the opposite result may emerge in a model where households are heterogeneous and where a uniform poll tax or subsidy is available

simulating fundamental tax reform in the united states this paper uses a new large scale dynamic life cycle simulation model to compare the welfare and macroeconomic effects of transitions to five fundamental alternatives to the u s federal income tax including a proportional consumption tax and a flat tax the model incorporates intragenerational heterogeneity and a detailed specification of alternative tax systems simulation results project significant long run increases in output for some reforms for other reforms namely those that seek to insulate the poor and initial older generations from adverse welfare changes long run output gains are modest

modeling overlapping generations in a complementarity format abstract this paper provides an introduction to numerical simulation of overlapping generations models with perfect foresight and finite lifetimes the exposition presents the fundamental characteristics of this class of problems and gams programs illustrate how models can be formulated in applied research using the complementarity framework issues addressed in the paper include how to calibrate to baseyear data and how to represent international trade bequests government tax and expenditure policies and a labor leisure choice with endogenous retirement

nit picking the macroeconomic effects of a negative income tax i study a revenue neutral reform of the u s income tax and welfare system that involves the adoption of a negative income tax nit the reform is undertaken in a life cycle economy with individual heterogeneity and uninsurable idiosyncratic labor risk the optimal nit consists of a 22 rate and a transfer equivalent to 11 of per capita gdp the ex ante average welfare gain is a 2 1 annual increase of individual consumption i show that a nit outperforms a flat tax reform income tax plus deduction by a considerable margin the key consequence of the reform is that high productivity agents increase their relative importance in the labor supply at the expense of low productivity agents