on the optimality of the nordic system of dual income taxation abstract in recent years the nordic countries have introduced a so called dual income tax which combines a proportional tax on capital income with progressive taxation of labour income the paper argues that this asymmetric treatment of the two types of income can be defended on pure efficiency grounds because the progressivity of the labour income tax serves to reduce the private return to human capital investment thereby offsetting the tendency of a proportional comprehensive income tax to discriminate in favour of such investment the analysis is based on an overlapping generations model of a small open economy where consumers face a trade off between investment in human capital and investment in non human capital extended versions of the model allow for liquidity constraints and an endogenous labour leisure choice

taxation and excess burden a life cycle perspective a lifetime perspective is appropriate in assessing the welfare implications of government tax policies although a number of attempts have been made to ex amine the excess burden of taxation in life cycle models these have tended to ignore the role of human capital accumulation and or the leisure income choice in this paper we do numerical simulations with a model that takes both of these phenomena into account we find that under reasonable assumptions the failure to take into account distortions of human capital decisions produces substantial underestimates of the excess burden of income taxation in addition allowing for the endogeneity of human capital increases the efficiency of a personal consumption tax relative to that of an equal yield income tax this abstract was borrowed from another version of this item

economies of scale and barriers to entry dixit has recently presented a model in which established firms select capacity to discourage entry but cannot employ threats they would not rationally execute after entry entry deterrence in a slight modification of this model involves the classical limit price output under linear or concave demand however the capital cost of a firm of minimum efficient scale is an upper bound on the present value of the monopoly profit stream that can be shielded from entry it is argued that this suggests the general unimportance of entry barriers erected by scale economies

protectionism trade and measures of damage from exotic species introductions unintentional introductions of nonindigenous plants animals and microbes cause significant ecological and agricultural crop damage worldwide trade in both manufactured and agricultural goods is a primary vector for such introductions fusing simple models of trade and biological introductions we explore the links between trade protectionism and damage arising from exotic species introductions we show that it is possible for freer trade to reduce damage arising from exotic species invasions we also show how current measures of damage heavily weighted toward agricultural damage serve as misleading indicators of how restrictions to trade affect total losses arising from exotic species

interpreting the results of empirical analyses of intertemporal allocation an identification problem abstract empirical analyses of household behaviour often find that behaviour is intertemporally non additive in the sense that past state variables affect current behaviour this may be because preferences are nonadditive because of habits or satiation or because budgets are non additive for example because of human capital formation or imperfections in credit markets in this note i show that there is a fundamental identification problem in that we cannot infer from observed quantities and prices whether any nonadditivity in behaviour is coming from the budget constraint or the utility function

the principle of minimum differentiation holds under sufficient heterogeneity the so called principle of minimum differentiation stated by hotelling has been challenged by many authors this paper restores the principle by showing that n firms locate at the center of the market and charge prices higher than the marginal cost of production when heterogeneity in consumers tastes is large enough

price protection and productivity growth this study provides empirical evidence on the relationship between price protection and productivity growth from theoretical considerations it is concluded that the impact of price protection on productivity growth is ambiguous although protectionism may in some instances stimulate investment and adoption of new technologies efficiency may decrease particularly when farm prices and income are high empirical evidence from the new zealand beef sheep industry indicates that high protection during the 1975 85 period produced negative productivity growth following market liberalization in 1985 productivity growth increased substantially

a household hedonic model of rice traits economic values from farmers in west africa abstract new crop varieties often have been promoted in developing countries based upon superior yield vis a vis locally available varieties this research presents a hedonic price model for upland rice by drawing upon the input characteristics and consumer good characteristics model literature model specification tests determine that a combination of production and consumption characteristics best explains the willingness to pay for new upland rice varieties the household model specification determined that five traits explain the willingness to pay for new rice varieties plant cycle length plant height grain colour elongation swelling and tenderness yield was not a significant explanatory variable of the willingness to pay for seed the implications of this model are two fold first varietal development and promotion must include post harvest characteristics in addition to production traits when determining which varieties to promote for official release secondly non yield production characteristics such as plant height and cycle length are significant factors in producer s assessments of the value of a new variety overall this paper provides an alternative explanation for limited adoption of modern upland rice varieties in west africa varietal evaluation programs have focused too narrowly on yield evaluation and have not promoted varieties with superior non yield characteristics than locally available varieties

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

assessing the dynamic efficiency gains of tax reform when human capital is endogenous this paper develops a life cycle growth model with endogenous human capital accumulation and variable leisure which is employed to simulate dynamic equal yield changes from an income tax to a consumption tax although endogenizing human capital investment decisions raises partial equilibrium estimates of the efficiency costs of capital income taxation general equilibrium welfare impacts of unanticipated tax changes are little affected by the inclusion of endogenous human capital this finding cannot be fully explained by the presence of general equilibrium adjustments in factor prices and can be attributed in part to the existence of transitional rigidities in capital stocks copyright 1995 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

demographic change and income distribution this paper examines the interactions between demographic change and income distribution especially in the context of government starting from a simple descriptive life cycle model of individual income this paper established an explicit link between the age composition of a population and the personal distribution of incomes demographic effects on income inequality are derived next 2 income maintenance programs are introduced a redistributive tax transfer scheme and a pay as you go financed state pension system the resulting government budget constraints entail interrelations between fiscal and demographic variables causing an additional indirect demographic impact on the distribution this is shown not only to change but in some cases even to reverse the distributional incidence of demographic trends the superimposition of different age structures on populations of otherwise identical characteristics is non neutral with respect to income distribution disregarding state interventions population aging increases income inequality this result may no longer generally hold if redistribution policies are taken into account the paper provides an example of how indirect demographic effects may lead to a reversal of sign in the absence of any government program a higher ratio of pensioners to active workers raises income inequality in the presence of a redistributive tax transfer scheme and pay as you go financed state pension system a higher dependency ratio decreases income dispersion the restoration of government budget equilibrium induces unintended distributional effects which put the incidence of demographic shifts in a different light varying important aging indicator with realistic forecast bounds leads to inequality fluctuations up to 35 this illustrates the quantitative scale and hence the political importance of demographically caused inequality distortions

the intercountry agricultural production function another view factor productivity in agriculture is estimated from repeated observations on a sample of fifty eight countries under the assumption that all countries have access to the same technology technology is viewed as a collection of techniques each technique is represented by a production function the choice of the implemented techniques is determined by the state variables which represent the physical and economic environment within which the firms operate the statistical model is that of varying coefficients and it is estimated by a method which utilizes principal components and multiple comparisons

the existence of equilibrium in discontinuous economic games ii applications in part i of this study we established two existence theorems for mixed strategy equilibrium in games with discontinuous payoff functions see theorems 4 4 and 5 5 in dasgupta and maskin 1986 hereafter d m 1986 in this second part we use the second of these two theorems to prove the existence of mixed strategy equilibrium in some wellknown discontinuous economic games that fail to have pure strategy equilibria the models we analyse are the bertrand edgeworth example of price setting duopolists with capacity constraints see section 2 2 price competition among firms producing differentiated products hotelling 1929 and d aspremont gabszewicz and thisse 1979 see section 2 3 spatial competition eaton and lipsey 1975 and shaked 1975 see section 3 and models of market dependent information rothschild and stiglitz 1976 and wilson 1977 section 4 the paper concludes section 5 with a classification of these models

hotelling s spatial competition as a model of sales abstract hotelling s spatial competition model is used to explain the existence of sales it is shown that 1 an equilibrium in randomized strategies exists when a pure strategy equilibrium fails to exist 2 with more dissimilarity among brands prices are chosen from a wider interval

the transition of punjab agriculture a choice of technique approach the introduction of modern crop varieties in punjab india led to rapid income growth adoption rate and level of the new varieties is examined using a choice of technique approach in which techniques of production are identified by crop variety season of growth and method of production modeling the dynamic effects of technology resource availability and incentives reveals a consistent picture of the transition process the results show the importance of incentives and availability of quasi fixed inputs such as irrigation fertilizers and roads by the late 1970s the long run aggregate supply elasticity was between 1 3 1 5

spatial competition and price leadership in the stackelberg price leader price follower model each firm is typically better off as a follower than as a leader in this paper we show that introducing the spatial dimension provides a means of endogenising the role of price leadership furthermore the leader follower framework yields existence of a price and location equilibrium in the hotelling spatial model of competition where none exists under the original specification we first analyse the original hotelling model by determining reaction functions for firms this approach allows the model to be fully characterised and affords an intuitive explanation of the non existence of a price equilibrium for certain locations the reaction functions are then used to determine the solution when one firm adopts the stackelberg leadership role contrary to the existing predictions of the simple spatial duopoly model it is found that the outcome is asymmetric in terms of stackelberg equilibrium locations prices and profits with the first firm in the market enjoying higher profits than the subsequent entrant the equilibrium involves one firm locating at the mid point of the market this outcome is also appealing as it corresponds to the entry deterring and monopoly solutions

the effect of taxation on human capital this study finds a significant negative effect of proportional income taxation on human capital of the few earlier studies to address this issue most suggested a negligible effect of taxation on investment in human capital this earlier conclusion is shown to be incorrect by using a model that is more general in several respects than the models used previously

taxation and long run growth abstract a number of recent papers have investigated the growth effects of tax reforms in the context of neoclassical growth models with human capital growth effects were found to be large but highly sensitive to parameter choices this paper shows that growth effects are smaller and much less sensitive in models that generate realistic life cycle behavior which requires that households are finitely lived but generations may be altruistically linked and face diminishing point in time returns in human capital accumulation reasonable upper bounds for growth effects in such models are less than one third of some values reported in the literature

marketing reforms market development and agricultural production in china abstract chinese agricultural reforms have consisted of two transitional stages initially decollectivization in the late 1970s followed by market liberalization in the mid 1980s while much research has been conducted on the initial stage of increasing the incentives for farmers in collective cultivation little quantitative evidence exists on how marketing reforms and the development of rural markets has affected agricultural production decisions using more accurate and disaggregated measures of the reform and market development components of liberalization than previous research this study examined the effects of these liberalization policies on the agricultural production decisions in shaanxi province procurement quota levels were found to be positively associated with the area planted to grain crops thus quotas represent an effective way of increasing grain production and thereby also a means of achieving food self sufficiency which remains an important policy objective for the chinese government the involvement of state grain stations in free market grain trade and the expansion of rural markets has increased the area planted to the two potential cash crops soybeans and wheat and reduced the sown area of the subsistence crop corn reflecting the reduced need to plant corn as a self insurance mechanism for smoothing consumption an increase in procurement quotas increases fertilizer use on grain crops due to the policy of linking quotas to access to below market priced fertilizer but decreases the use of labor which shifts to other more profitable enterprises market development has increased these off farm employment opportunities and the earnings associated with them thereby promoting the shift of labor out of crop production and increased the use of fertilizer which has also become more available

estimating the supply response of cotton and cereal crops in smallholder production systems recent evidence from mali cotton is one of the most important crops in west africa and is a major catalyst of economic development in rural areas but the sector has suffered from a decline in the world cotton price after 1999 this article exploits an unusual data set following 82 farmers over 14 years from 1994 through 2007 to estimate a nerlovian supply response model for cotton maize sorghum and millet in long term rotation the resulting system of equations is estimated with two stage least squares 2sls showing that this sample of malian cotton producers have responded to prices in a relatively inelastic manner with supply elasticities only about one half of those estimated for producers in developed countries policy reforms could help producers respond more easily to prices changes as well as to raise average productivity levels

the existence of equilibrium in discontinuous economic games i theory the article presents information about the existence of equilibrium in discontinuous economic games in this paper and its sequel presents study the existence of nash equilibrium in games where agents payoff functions are discontinuous the enquiry is motivated by a number of recent studies that have uncovered serious existence problems in seemingly innocuous economic games in the sequel to this paper authors have explained the utility function in the economic games referred to earlier are neither continuous nor quasi concave however they demonstrate that the payoff functions in mildly modified versions of these constructs exhibit two weaker forms of continuity which together with the requirement of quasi concavity suffice for the existence of an equilibrium from this one may conclude that at least in the modified versions of these models discontinuities in the payoff functions are not the real source of the problem rather it is the failure of the payoff functions to the quasi concave which is responsible for the non existence of equilibrium these observations bear on the existence of nash equilibrium in pure strategies

sequential decision making in production models single equation estimates of production models usually are justified by the assumption that production inputs are chosen as part of a one period decision problem yet most production decisions in agriculture are made sequentially in this paper the farmer s optimal input choices are modeled as optimal controls in a stochastic control problem a two period cobb douglas example is used to show that sequential solutions to production problems may yield models which require either single equation or simultaneous equation estimators functional separability stochastic specification and behavior under uncertainty are discussed in the context of dynamic production models

on 64 majority rule introduction d une definition de consensus social base sur deux restrictions une sur les preferences individuelles et l autre sur la distribution des preferences dans ce cas de consensus une regle de majorite a 64 presente de nombreuses proprietes interessantes par opposition aux regles de super majorite possedant des proprietes paradoxales comme les regles electorales americaines

redistribution and education subsidies are siamese twins abstract we develop models of optimal linear and non linear income taxation with endogenous human capital formation to explore optimal education subsidies optimal subsidies on education ensure efficiency in human capital accumulation and thus play an important role in alleviating the tax distortions on learning induced by redistributive policies if the government cannot verify all investments in human capital education policy offsets some but not all tax induced distortions on learning non pecuniary educational costs benefits may increase decrease subsidies on education especially if they are complementary to work effort

product differences and prices abstract under assumptions following hotelling s 1929 paper stability in competition the possibility of constructing an example in which equilibrium prices exist everywhere and the two merchants display tendencies to agglomerate is ruled out

two stage perfect equilibrium in hotelling s model hotelling i 929 suggests that his spatial competition model can be used to describe a wide range of differentiation problems he points to the selection of product variety within an industry as a potential application most of the subsequent work in his tradition has taken the equivalence of the two problems for granted in this note we look more closely at this equivalence we distinguish between two types of differentiated products according to the variety of preferences assumed with respect to those products building on this distinction we recognize that the demand faced by a firm locating on hotelling s line is analogous to the demand faced by a firm selecting a horizontally differentiated product it should be emphasized thus that the equivalence between the geographical and the product selection problem is by no means general and relies on specific assumptions about consumers preferences next we formulate a small model close to hotelling s one in which firms select a horizontally differentiated product within this model it will be shown that a pure strategy price equilibrium exists for every pair of products this statement is to be contrasted with the results of d aspremont et al i979 who have shown that in the original hotelling s setting an equilibrium fails to exist when firms are too close together 1 in addition we will examine the product selection problem faced by firms in a two stage game in the first stage each firm selects a product in the second stage the firm defines a price for its product we will seek the existence of a perfect equilibrium in this game a perfect equilibrium in this context can be viewed as a nash equilibrium in a game in which firms select a product aware of the non cooperative price equilibrium that will occur for each of their choices it will be shown that contrary to hotelling s principle the two firms will maximise their differentiation i e firms will locate at opposite ends of the market

tax reform and external balance abstract this paper examines the effect of a transformation from capital taxation to consumption in an open economy with the residential capital tax rate being endogenous an increase in the domestic consumption tax rate decreases the interest rate increases capital accumulation and increases the domestic country s net foreign asset holdings and trade surplus with the territorial capital tax rate being endogenous an increase in the domestic consumption tax rate may either increase or decrease the domestic country s interest rate net foreign asset holdings and trade surplus depending on the interest elasticity of capital demand