weighing the costs and benefits of state renewables portfolio standards in the united states a comparative analysis of state level policy impact projections abstract state renewables portfolio standards rps have emerged as one of the most important policy drivers of renewable energy capacity expansion in the u s as rps policies have been proposed or adopted in an increasing number of states a growing number of studies have attempted to quantify the potential impacts of these policies focusing primarily on cost impacts but sometimes also estimating macroeconomic risk reduction and environmental effects this article synthesizes and analyzes the results and methodologies of 31 distinct state or utility level rps cost impact analyses completed since 1998 together these studies model proposed or adopted rps policies in 20 different states we highlight the key findings of these studies on the projected costs of state rps policies examine the sensitivity of projected costs to model assumptions evaluate the reasonableness of key input assumptions and suggest possible areas of improvement for future rps analyses we conclude that while there is considerable uncertainty in the study results the majority of the studies project modest cost impacts seventy percent of the state rps cost studies project retail electricity rate increases of no greater than 1 nonetheless there is considerable room for improving the analytic methods and therefore accuracy of these estimates

a positive theory of social security based on reputation we construct a general equilibrium model in which a pay as you go social security system can be adopted and sustained as a political and economic equilibrium we alalyze the welfare implictions of this system and compare general equilibrium welfare measure to the commonly used notion of actuarial fairness

are contributions to public pension programmes a tax on employment many studies describe the potentially adverse impact on employment of the payroll costs of financing public pension programmes conventionally empirical studies treat contributions to public pension programmes as a pure tax in for example calculations of the tax wedge by oecd but this approach ignores any future rights to benefits that are perceived by contributors in fact public pension programmes contain both an actuarial and a redistributive component the former closer to saving the latter a tax the paper constructs indicators of the tax component of pension programmes both between and within generations across a range of oecd countries and time periods it uses these measures in a cross country panel analysis of the determinants of age and gender specific economic activity rates the results reveal robust evidence that when public pension programme contributions are broken down into a tax component and a savings component the tax component of the payroll contribution reduces economic activity rates among women while a higher retirement saving component has the opposite effect there is little evidence that average tax rates however constructed have any adverse impact on the economic activity rates of men richard disney

intergenerational aspects of ecotax reforms an application to germany in a model of overlapping generations and majority voting we analyze an ecotax reform consisting of the tax rate and the budgetary rule revenue can be recycled through a lump sum transfer or a reduction in pension contributions our theoretical results as well as the calibration of our model to the german economy show that the median voter s preferred tax rate may exceed the efficient rate this holds whenever income of the decisive voter is sufficiently high compared to the average income as rich individuals benefit more from a reduction in pension contributions than they are harmed by an increase in ecotaxes the calibration confirms that the median voter prefers the earmarking of tax revenue for reductions in pension contributions to the alternative lump sum transfer this is quite an accurate prediction of the situation in germany aging of society as expected for germany lowers the ecotax in the political equilibrium below its optimal level

markovian social security in unequal societies in this paper we develop a dynamic political economic theory of social security we analytically characterize a markov perfect equilibrium and find that the interaction between markovian tax policy and tax distortion on private investment in human capital shapes an intertemporal policy rule linking taxes positively over time by allowing current taxpayers to influence their own future social security benefits the positive intertemporal tax linkage provides political support for social security moreover this positive tax linkage leads to a negative correlation between wage inequality and the size of a nation s social security system consistent with the empirical pattern observed across oecd countries

the triple bottom line meeting ecological economic and social goals with individual transferable quotas this paper deals with the sustainable management of a renewable resource based on individual and transferable quotas itqs when agents differ in terms of harvesting costs or catch capability in a dynamic bio economic model we determine the feasibility conditions under which a fishery manager can achieve sustainability objectives which simultaneously account for stock conservation economic efficiency and maintenance of fishing activity for the agents along time we show how the viability of quota management strategies based on itq depends on the degree of heterogeneity of users in the fishery the current status and the dynamics of the stock together with the selection of tac schedules in particular for a given stock we compute the maximin effort for a given set of agents and we derive the maximal number of active agents for a given guaranteed effort an application to the nephrops fishery in the bay of biscay illustrates the results

would you like to reform the pension system the opinions of european citizens most economists would subscribe to the view that the public pay as you go payg pension systems in many european countries are unsustainable and in need of reform yet such reforms are politically very difficult a recent line of research has tried to understand the nature of these difficulties by analyzing the citizens opinions on different aspects of the welfare state and its redistributive programs here we focus specifically on the pension system reporting the results of a survey conducted in germany and italy in fall 2001 germany and italy are particularly interesting countries in this respect because their payg pension systems are very generous and provide about 85 percent of the average retiree s income germany carried out a reform in 2001 in between two waves of our survey thus we also have a natural experiment to draw upon our questionnaire was designed to shed light on the following issues are citizens aware of the unsustainability of the pension system and informed of its costs are reforms opposed by a majority or by a powerful minority which reform options seem politically more feasible and why which groups of citizens are more likely to favor reforms do citizens opinions reflect their economic self interest as presumed by the literature on political economics here is what we find citizens are aware of unsustainability but lack information about the cost of the payg system the status quo is a majoritarian outcome along many dimensions most reform proposals lack a majority and reformers rarely support more than one reform option later retirement is the easier reform in italy where effective retirement age is lower while lower pensions are more popular in germany where the effective replacement rate is higher preferences over policy options seem to reflect both economic self interest and one s normative view about the role of the state opposition to any reform is high even among those aware of unsustainability this could be procrastination or selfishness shifting the burden onto future generations some answers suggest that the latter could play an important role

the aging population and the size of the welfare state data for the united states and countries in western europe indicate a negative correlation between the dependency ratio and labor tax rates and the generosity of social transfers after other factors that influence the size of the welfare state are controlled for this occurs despite the increased political clout of the dependent population implied by the aging of the population this paper develops an overlapping generations model of intra and intergenerational transfers including old age social security and human capital formation that addresses this seeming puzzle we show that with democratic voting an increase in the dependency ratio can lead to lower taxes or less generous social transfers

social security incentives human capital investment and mobility of labor migration between countries with earnings related and flat rate pay as you go social security systems may change human capital investments in both countries the possibility of emigration boosts investments in human capital in the country with flat rate benefits correspondingly those expecting to migrate from the country with earnings related benefits to a country with flat rate benefits may reduce their investment in education allowing for migration may generate an intertemporal pareto improvement with cross border transfers and the contribution rates satisfying certain conditions however these conditions are not satisfied with those contribution rates that would arise if the governments maximize the welfare of their citizens without migration

spillovers in regional fisheries management do catch shares cause leakage regional councils manage u s fisheries fishermen can participate in fisheries managed by multiple councils and effort controls in one region could lead to effort leakage into another theoretical modeling demonstrates that positive negative and no leakage are possible using difference in differences we test for leakage across regional boundaries for a catch share program in new england and find evidence that the new england groundfish sector program caused spillover into adjacent mid atlantic fisheries aggregate mid atlantic harvest volume increased among sector members after the policy change we find leakage in individual fisheries with similar gear and high market substitutability with sector species

seasonal harvest patterns in multispecies fisheries fishers face multidimensional decisions when to fish what species to target and how much gear to deploy most bioeconomic models assume single species fisheries with perfectly elastic demand and focus on inter seasonal dynamics in real world fisheries vessels hold quotas for multiple species with heterogeneous biological and or market conditions that vary intra seasonally we analyze within season behavior in multispecies fisheries with individual fishing quotas accounting for stock aggregations capacity constraints and downward sloping demand numerical results demonstrate variation in harvest patterns we specifically find 1 harvests for species with downward sloping demand tend to spread out 2 spreading harvest of a high value species can cause lower value species to be harvested earlier in the season and 3 harvest can be unresponsive or even respond negatively to biological aggregation when fishers balance incentives in multispecies settings we test these using panel data from the norwegian multispecies groundfish fishery and find evidence for all three we extend the numerical model to account for transitions to management with individual fishing quotas in multispecies fisheries we show that under some circumstances fishing seasons could contract or spread out

location choice in new england trawl fisheries old habits die hard in his seminal work on common property resources h scott gordon proposed that in a fishery with multiple grounds effort would be distributed such that profit rates would be equal among them gordon s model relies on implicit assumptions that are inaccurate and lead to false conclusions in many cases in this paper we present an empirically estimated model of fishery and location choice for large trawlers in new england using a random utility framework with a nested logit model specification we use the model to test the validity of a behavioral model developed from ethnographic interviews with skippers

private property and economic efficiency a study of a common pool resource abstract the british columbia halibut fishery provides a natural experiment of the effects of privatizing the commons using firm level data from the fishery 2 years before private harvesting rights were introduced the year they were implemented and 3 years afterward a stochastic frontier is estimated to test for changes in technical allocative and economic efficiency the study indicates that 1 the short run efficiency gains from privatization may take several years to materialize and can be compromised by restrictions on transferability duration and divisibility of the property right 2 substantial long run gains in efficiency can be jeopardized by preexisting regulations and the bundling of the property right to the capital stock and 3 the gains from privatization are not just in terms of cost efficiency but include important benefits in revenue and product form

political economy of pension plans impact of institutions gender and culture abstract national pension systems are an important part of financial intermediation and worker welfare in most countries but how and why do they differ internationally controlling for important political economic and social institutions we document that international differences in pension progressivity or how pensions reflect lifetime earnings are negatively related to masculinity uncertainty avoidance individualism long term orientation employment rights average pension levels social trust and economic inequality we also find that pension progressivity is positively related to the economic and societal role of women the extent of catholicism as well as political voice and accountability these results provide important insights for both public policy and mnc managers

life expectancy heterogeneity and the political support for collective annuities individuals differing in productivity and life expectancy vote over the size and type of a collective annuity its type is represented by the fraction of the contributive bismarckian component based on the worker s past earnings as opposed to the non contributive beveridgean part based on average contribution the equilibrium collective annuity is either a large mostly bismarckian program a smaller pure beveridgean one in accordance with empirical evidence or nil a larger correlation between longevity and productivity or a larger average life expectancy both make the equilibrium collective annuity program more beveridgean although at the expense of its size

dissecting the tragedy a spatial model of behavior in the commons abstract much of the discussion of the tragedy of the commons focuses on aggregate impacts often in data poor developing country settings few non experimental empirical studies shed light on contextual circumstances driving the extent of rent dissipation and overexploitation we utilize a high resolution data set to estimate a behavioral model of fishermen s spatial choices a unique policy setting allows us to measure the degree to which individual fishermen s choices appear aimed at mitigating the tragedy of the commons in a small numbers setting we find evidence of partial mitigation in excess of what we would expect under pure self interest but short of what would occur under group maximizing behavior we also examine how contextual factors in the fishery shape the degree of cooperation within the fishing season and find evidence that competition for the common pool resource distorts fishermen s implicit cost of distance creating a form of common property inertia

the redistributive design of social security systems countries with low intragenerational redistribution in social security systems bismarckian are associated with larger public pension expenditures a smaller fraction of private pension and lower income inequality than countries with more redistributive social security beveridgean this article introduces a bidimensional voting model to account for these features agents different in age income and in their ability to invest in the capital market vote on the degree of redistribution of the social security system and on the size of the transfer in an economy with three income groups a small beveridgean system is supported by low income agents who gain from its redistributive feature and high income individuals who seek to minimise their tax contribution and to invest in a private scheme middle income individuals instead favour a large bismarckian system

political sustainability and the design of social insurance this paper examines how the issue of political support affects the design of social insurance it distinguishes between redistributive character and size of social protection three main results emerge first it may be appropriate to adopt a system which is less redistributive than otherwise optimal in order to ensure political support for an adequate level of coverage in the second voting stage second supplementary private insurance may increase the welfare of the poor even if it is effectively bought only by the rich third the case for prohibiting supplementary private insurance may become stronger when the efficiency of private insurance markets increases

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

an empirical approach to ecosystem based fishery management abstract marine scientists and policymakers are encouraging ecosystem based fishery management ebfm but there is limited guidance on how to operationalize the concept we adapt financial portfolio theory as a method for ebfm that accounts for species interdependencies uncertainty and sustainability constraints illustrating our method with routinely collected data available from the chesapeake bay we demonstrate the gains from taking into account variances and covariances of gross fishing revenues in setting species total allowable catches we find over the period from 1962 2003 that managers could have increased the revenues from fishing and reduced the variance by employing ebfm frontiers in setting catch levels

ends against the middle determining public service provision when there are private alternatives abstract public provision of a service coexists with private market provision the quality of public provision is determined by majority vote preferences are not single peaked owing to the presence of private alternatives we identify two cases in one majority voting equilibrium always exists and the median income voter is pivotal in the other a necessary condition for equilibrium indentifies the pivotal voter who must have income below the median when equilibrium exists a coalition of middle income households who consume the public alternative will be opposed by a coalition of rich and poor households with the rich choosing private consumption

viewpoint induced innovation in fisheries and aquaculture abstract some classical economists most notably malthus predicted that scarcity would undermine long term human well being john stuart mill in contrast predicted that the threat of scarcity creates incentives for innovation that help to avoid some of the worst outcomes popular claims of marine ecologists often apply the malthusian narrative to supplies of seafood yet global supplies have continued to grow we examine the modern seafood industry and evaluate mill s claims about innovation we argue that the mechanisms that mill discusses innovation in response to and in anticipation of scarcity account for much of what we see scarcities induce technological policy and market innovations that enable seafood supplies to grow and these innovations can build on each other the challenge for policy makers is to avoid knee jerk responses to malthusian narratives and craft policy responses that encourage innovation while recognizing physical limits of ocean resources

political intergenerational risk sharing abstract in a stochastic two period olg model featuring an aggregate shock to the economy ex ante optimality requires intergenerational risk sharing we compare the level of intergenerational risk sharing chosen by a benevolent government and by an office seeking politician in our political system the transfer of resources across generations is determined as a markov equilibrium of a probabilistic voting game low realized returns on the risky asset induce politicians to compensate the old through a payg system this political system typically generates an intergenerational risk sharing scheme that is i larger ii more persistent and iii less responsive to the realization of the shock than the social optimum this is because the current politician anticipates her transfers to the elderly to be compensated by future politicians through offsetting transfers and hence overspends

fishing quota markets abstract in 1986 new zealand responded to the open access problem by establishing the world s largest individual transferable quota itq system using a 15 year panel dataset from new zealand that covers 33 species and more than 150 markets for fishing quotas we assess trends in market activity price dispersion and the fundamentals determining quota prices we find that market activity is sufficiently high in the economically important markets and that price dispersion has decreased we also find evidence of economically rational behavior through the relationship between quota lease and sale prices and fishing output and input prices ecological variability and market interest rates controlling for these factors our results show a greater increase in quota prices for fish stocks that faced significant reductions consistent with increased profitability due to rationalization overall this suggests that these markets are operating reasonably well implying that itqs can be effective instruments for efficient fisheries management

social insurance majority voting and labor mobility abstract this paper presents a political economy approach to payroll tax competition between two countries choosing their respective systems of social insurance in a context of labor mobility it considers a class of social insurance systems which includes two interesting polar cases one where benefits are linked to contributions bismarck and one where benefits are flat beveridge the type of social insurance is chosen behind the veil of ignorance at a first constitutional stage in the second stage the generosity of social insurance as measured by the payroll tax rate is chosen by the majority given that some have the possibility to move the main results are as follows first the type of mobility namely poor vs rich has a significant impact on the second stage tax competition migration equilibrium second more bismarckian systems are not necessarily more tax competition proof third the process will result in social insurance systems with a stronger than optimal link between earnings and benefits put differently at the constitutional stage the countries will tend to adopt systems which are too bismarckian

positive arithmetic of the welfare state abstract this paper argues that social security enjoys wider political support than other welfare programs because i retirees constitute the most homogeneous voting group and ii the intragenerational redistribution component of social security induces low income young to support this system in a dynamically efficient overlapping generation economy with earnings heterogeneity we show that for sufficient income inequality and enough elderly in the population a welfare system composed of a within cohort redistribution scheme and an unfunded social security system represents the political equilibrium of a two dimensional majoritarian election social security is sustained by retirees and low income young while intragenerational redistribution by low income young unlike unidimensional voting model our model suggests that to assess how changes in inequality affect the welfare state the income distribution should be decomposed by age groups

lessons for an aging society the political sustainability of social security systems what is the future of social systems in oecd countries in our view the answer belongs to the realm of politics we evaluate how political constraints shape the social security system in six countries france germany italy spain the uk and the us under population aging two main aspects of the aging process are relevant to the analysis first the increase in the dependency ratio the ratio of retirees of workers reduces the average profitability of the unfunded social security system thereby inducing the agents to reduce the size of the system by substituting their claims towards future pensions with more private savings second an aging electorate leads to larger systems since it increases the relevance of pension spending on the policy makers agenda the overall assessment from our simulations is that the political aspect dominates in all countries albeit with some differences spain the fastest aging country faces the largest increase in the social security contribution rate when labor market considerations are introduced the political effect still dominates but it is less sizeable country specific characteristics not accounted for in our simulations such as the degree of redistribution in the pension system and the existence of family ties in the society may also matter our simulations deliver a strong policy implication an increase in the effective retirement age always decreases the size of the system chosen by the voters while often increasing its generosity finally delegation of pension policy to the ec may reduce political accountability and hence help to reform the systems

a model of regulated open access resource use abstract this paper develops a model of regulated open access resource exploitation the regulatory model assumes that regulators are goal oriented choosing target harvest levels according to a safe stock concept these harvest quotas are implemented by setting season lengths conditioned on the industry fishing capacity the industry enters until rents are dissipated conditioned on season length regulations harvest levels fishing capacity season length and biomass are determined jointly using parameter estimates from the long regulated north pacific halibut fishery predictions of these variables from the regulated open access model are compared to predictions that arise from the gordon model

markets and rent dissipation in regulated open access fisheries abstract using a model of regulated open access resource use with markets we illustrate the potential complexity of interactions between markets product quality excess effort and regulatory behavior in fisheries our model assumes two product types one of which is processed and storable the model describes the equilibrium that results when effort responds to open access incentives and when regulators respond to effort growth by mitigating its potential harmful effects on biomass safety we use numerical simulations to demonstrate a mechanism by which market growth leads to the diversion of raw inputs into the inherently inferior market the result is a scenario in which rents are dissipated not only because excessive inputs raise costs but also because inferior product types reduce revenues we conclude with an illustrative decomposition of rent gains into revenue and cost savings gains from rationalizing a hypothetical fishery demonstrating the potential significance of market side rents

assessing efficiency gains from individual transferable quotas an application to the mid atlantic surf clam and ocean quahog fishery delayed fishing fleet restructuring complicates the assessment of efficiency gains from individual transferable quota itq fisheries management programs this article presents a methodology to estimate harvest sector efficiency gains in lieu of incomplete fleet restructuring the methodology is applied to assess the efficiency gains in the mid atlantic surf clam and ocean quahog fishery itq program while roughly 128 vessels harvested clams under the previous management regime the analysis suggests that 21 25 vessels will remain under ltqs the efficiency gains are estimated to be between 11 1 million and 12 8 million annually 1990 dollars

sushi or fish fingers seafood diversity collapsing fish stocks and multispecies fishery management we present a model of a multispecies fishery and we show the following i consumer preferences for seafood diversity can trigger a sequential collapse of fish stocks under open access fishery ii the stronger the preferences are for diversity the higher is the need for coordinated multispecies regulation iii second best optimal management of only one or a few species is less strict than socially optimal management of the same species iv myopic regulation of one species ignoring spillovers to other species can cause depletion of other stocks that would not be depleted under open access

means testing versus basic income the lack of political support for a universal allowance this paper studies the political economy of a basic income bi versus a means tested welfare scheme we show in a very simple setting that if society votes on the type of system its generosity as well as the severity of means testing if any a bi system could only emerge in the political equilibrium under very strong and empirically implausible conditions instead the political process leads to a means tested system the necessity to draw political support does affect the design of the system but it only implies that means testing becomes less severe so that benefits are extended also to themiddle classes however a fully universal system is rejected by a majority

the portfolio composition of asset holdings in the united kingdom an extensive literature has developed on theoretical aspects of portfolio selection one basic model which often serves as a convenient benchmark assumes that individuals choose their portfolio to maximise expected utility in a world of perfect information perfect capital markets and no taxes or transaction costs if these individuals exhibit constant relative risk aversion the optimal asset combination will be one in which the proportion of wealth invested in each type of asset is independent of total wealth the asset proportions are also independent of age if the analysis is extended to a lifecycle framework with an additively separable intertemporal utility function once the stringent preconditions of this benchmark model are relaxed it becomes progressively more difficult to derive any firm predictions regarding the structure of asset portfolios the recognition of such factors as transaction costs indivisibilities capital market imperfections and the vagaries of tax systems as well as the possibility that relative risk aversion may not be constant makes it unlikely that asset proportions will show stability across wealth and age groups but portfolio theory is generally ambiguous about how the pattern of asset holdings is affected 2 it follows that the further analysis of portfolio behaviour needs to be primarily empirically orientated unfortunately data on the asset holdings of individuals or households are notoriously poor in comparison with other important economic variables information is available from sample surveys but there are usually problems with the limited asset coverage suspect valuations and biases arising from the non randomness of response rates furthermore the sample sizes are generally low against these deficiencies has to be set the fact that the surveys contain a range of other economic variables and demographic characteristics whose relationship with asset holdings can be investigated projector and weiss i966 report asset shares for a sample of 2 557 households in the united states and these data have been subsequently used by feldstein i976 to examine the impact of the tax structures on asset holdings using another source uhler and cragg i97i present results on portfolio composition for 965 households focusing in particular on the holdings of money balances exploiting yet

location choice of commercial fishermen with heterogeneous risk preferences location choice of commercial fishermen with heterogeneous risk preferences author s johan a mistiaen and ivar e strand reviewed work s source american journal of agricultural economics vol 82 no 5 proceedings issue dec 2000 pp 1184 1190 published by oxford university press on behalf of the agricultural applied economics association stable url http www jstor org stable 1244248 accessed 25 01 2012 20 19

efficiency risk aversion and portfolio insurance an analysis of financial asset portfolios held by investors in the united kingdom using data for the united kingdom the author shows that investors in six different wealth ranges hold mean variance efficient portfolios of financial assets this result permits him to estimate coefficients of relative risk aversion for investors in each wealth range the author finds that these coefficients are much higher than most previous studies have found this implies that investors 1 are unwilling to hold risky assets unless they are compensated with a sufficiently high risk premium and 2 are willing to pay for portfolio insurance the general nonavailability of portfolio insurance in the united kingdom appears to indicate a supply side rather than a demand side failure copyright 1996 by royal economic society

a positive theory of social security in many countries social security accounts for a large fraction of the government budget why is this so given that at any point in time the number of recipients of social security benefits is smaller than the number of contributors in the overlapping generations model studied in this paper all individuals currently alive vote on social security in every period in equilibrium the size of social security is larger the greater is the proportion of elderly people in the population and the greater is the inequality of pre tax income within each generation both predictions of the theory are supported by the empirical evidence in cross country data

discrete modelling of supply response under uncertainty the case of the fishery abstract in the absence of complete control in a regulated industry effective management requires prediction of firms behavioral responses to public policy this paper develops a discrete choice model of supply response under uncertainty and applies it to fishery choice problems of new england fishing firms while fishermen demonstrate a bias towards remaining within the same fishery sufficient incentives in terms of changes in expected returns and risk are shown to elicit response due to extreme uncertainty concerning population dynamics of fish stocks a satisficing approach to management facilitated by this type of modelling may be more appropriate than bioeconomic optimization

voting over type and generosity of a pension system when some individuals are myopic this paper studies the determination through majority voting of a pension scheme when society consists of far sighted and myopic individuals all individuals have the same basic preferences but myopics tend to adopt a short term view instant gratification when dealing with retirement saving and labor supply consequently they will find themselves with low consumption after retirement and regret their insufficient savings decisions henceforth when voting they tend to commit themselves into forced saving we consider a pension scheme that is characterized by two parameters the payroll tax rate that determines the size or generosity of the system and the bismarckian factor that determines its redistributiveness individuals vote sequentially we examine how the introduction of myopic agents affects the generosity and the redistributiveness of the pension system our main result is that a flat pension system is always chosen when all individuals are of one kind all far sighted or all myopic while a less redistributive system may be chosen if society is composed of both myopic and far sighted agents furthermore while myopic individuals tend to prefer larger payroll taxes than their far sighted counterparts the generosity of the system does not always increase with the proportion of myopics