public employment and the welfare state in sweden this is a nontechnical summary of a much longer study which will appear with the same title in richard freeman birgitta swedenborg and robert topel eds forthcoming i am especially indebted to henry ohlsson and birgitta swedenborg and to stan engerman vic fuchs assar lindbeck stephen lundgren and agnar sandmo for comments on initial drafts i alone am responsible for the views expressed here

guarding the guardians good government requires some restraints on the powerful but how can those be impose if there is no one above them this paper studies the equilibrium allocation of power and resources established by self interested incumbents under the threat of rebellions from inside and outside the group in power commitment to uphold individuals rights can only be achieved if power is not as concentrated as incumbents would like it to be ex post power sharing endogenously enables incumbents to commit to otherwise time inconsistent laws by ensuring more people receive rents under the status quo and thus want to defend it

pillage and property this paper introduces a class of coalitional games called pillage games as a model of hobbesian anarchy any coalition can pillage costlessly and with certainty any less powerful coalition power is endogenous so a pillage game does not have a characteristic function but pillage provides a domination concept that defines a stable set which represents an endogenous balance of power every stable set contains only finitely many allocations and can be represented as a farsighted core additional results are obtained for particular games including the game in which the power of each coalition is determined by its total wealth

delegating climate policy to a supranational authority a theoretical assessment abstract this paper studies the delegation of climate policy to a supranational environmental authority we develop a simple model of a world consisting of a large number of countries which derive utility from energy consumption countries suffer from global warming and local air pollution both caused by the combustion of fossil fuels and decide individually on investments in clean technologies for energy production a supranational environmental authority decides for each country on the maximally permitted amount of greenhouse gas emissions we demonstrate that the authority faces a dynamic inconsistency problem that leads to welfare losses but these losses can be kept small if the authority is endowed with an optimally designed mandate the optimal mandate penalizes the cost of local air pollution very heavily relative to the cost of global warming however delegation of climate policy faces a further difficulty as countries have a recurrent incentive to change the authority s mandate over time

why do governments subsidise investment and not employment abstract the governments of nearly all industrialised countries use subsidies to support the economic development of specific sectors or regions with high rates of unemployment conventional economic wisdom would suggest that the most efficient way to support these regions or sectors is to pay employment subsidies we present evidence showing that capital subsidies are empirically much more important than employment subsidies we then develop a simple model with unemployment to explain this phenomenon in our model unemployment arises due to bargaining between unions and heterogenous firms that differ with respect to their productivity union bargaining power raises wage costs and leads to a socially inefficient collapse of low productivity firms and a corresponding job loss union firm bargaining also gives rise to underinvestment it turns out that an investment subsidy dominates an employment subsidy in terms of welfare if there is bargaining over wages and employment on the firm level if bargaining is over wages only results are ambiguous but capital subsidies may still be preferable

is unemployment lower if unions bargain over employment would there be more employment if unions bargained over employment and not only over wages most economists seem to answer yes 1

dynamic processes of social and economic interactions on the persistence of inefficiencies an economy with a finite number of agents and a finite number of states is considered an exogenous institutional rule prescribes which moves from one state to another are feasible to each coalition at each time an agent is called to act with some exogenous probability and he chooses a coalition a feasible new state to move the economy to and side payments between the agents in the coalition the setup can be applied to various dynamic processes of social and economic interactions such as legislative bargaining coalition formation or exchange economies whenever agents are unable to write long term contracts but are otherwise unconstrained both in their ability to write arbitrary spot contracts and in their ability to collude there can be long run inefficiencies with cycles or inefficient steady states however when agents are sufficiently patient the initial state from which the process starts plays no role in the long run moreover when there exists an efficient state that is free of negat

a mechanism design approach to climate change agreements we take a mechanism design perspective to investigate how environmental agreements should account for multilateral externalities incentive compatibility and voluntary participation by sovereign countries the optimal mechanism involves a tradeoff between a free rider problem in the effort provision of participating countries and the necessity of inducing countries to ratify the agreement this mechanism can be approximated by a simple menu with attractive implementation and robustness properties limits on enforcement and commitment might nevertheless hinder the performance of this menu making the business as usual scenario more likely

do binding agreements solve the social dilemma we investigate whether binding agreements can provide a solution to the social dilemma that arises in the presence of pure public goods by signing a binding agreement players can prevent free riding by the contributors to a public good however a well known theoretical result is that the outcome of the endogenous formation of agreements is not necessarily efficient in our setting the individual level of contribution to the public good increases with the size of the coalition reaching an agreement and the global coalition is always the socially optimal structure agreements form sequentially and the equilibrium outcome is an asymmetric structure which consists of two coalitions our experiment therefore lends force to the theoretical result that outcomes may be inefficient in fact we observe an outcome which is even less efficient than that predicted by the equilibrium agreement structure however it seems that when subjects reach agreements they do so with the intention of cooperating rather than free riding furthermore it seems that they learn to cooperate over time and reach the global agreement more often towards the end of sessions keywords

incomplete contracts and strategic ambiguity why are observed contracts so often incomplete in the sense that they leave contracting parties obligations vague or unspecified traditional answers to this question invoke transaction costs or bounded rationality in contrast the authors argue that such incompleteness is often an essential feature of a well designed contract specifically once some aspects of performance are unverifiable it is often optimal to leave other verifiable aspects of performance unspecified the authors explore the conditions under which this occurs and investigate the structure of optimal contracts when these conditions are satisfied copyright 1998 by american economic association

a model of endogenous government formation political parties bargain over the allocation of cabinet portfolios when forming coalition governments noncooperative theories of legislative bargaining typically predict that the formateur enjoys a disproportionate share of government ministry positions however empirical evidence indicates that parties receive shares of portfolios proportional to their share of legislative seats that a government party contributes to the government coalition in support of gamson s law of portfolio allocation this article examines government formation as a process in which both the government coalition and the formateur are determined endogenously in equilibrium if parties have similar preferences over cabinet portfolios the share of seats they are allocated is proportional to the parties sizes

the strategy structure of some coalition formation games in coalitional games with side payments the core predicts which coalitions form and how benefits are shared the predictions however run into difficulties if the core is empty or if some coalitions benefit from not blocking truthfully these difficulties are analyzed in games in which an a priori given collection of coalitions can form as the collection of pairs of buyer seller in an assignment game the incentive properties of the core and of its selections are investigated in function of the collection furthermore the relationships with vickrey clarke groves mechanisms are drawn

unions oligopoly and the natural range of employment a simple two sector general equilibrium macromodel is presented wi th oligopolistic price determination in the product market and a unionized labor market in the first stage unions set the nominal wage and in the second stage firms choose outputs given wages by altering the balance of fiscal policy between the two sectors the government can achieve a continuum of aggregate employment levels the natural range of employment a unique natural rate will occur only i f one requires fiscal policy to be the same in both sectors this indicates that the natural rate property of some single or representative sect or macromodels is a special case

bargaining in legislatures bargaining in legislatures is conducted according to formal rules specifying who may make proposals and how they will be decided legislative outcomes depend on those rules and on the structure of the legislature although the social choice literature provides theories about voting equilibria it does not endogenize the formation of the agenda on which the voting is based and rarely takes into account the institutional structure found in legislatures in our theory members of the legislature act noncooperatively in choosing strategies to serve their own districts explicitly taking into account the strategies members adopt in response to the sequential nature of proposal making and voting the model permits the characterization of a legislative equilibrium reflecting the structure of the legislature and also allows consideration of the choice of elements of that structure in a context in which the standard institution free model of social choice theory yields no equilibrium

political selection and persistence of bad governments we study dynamic selection of governments under different political institutions with a special focus on institutional flexibility a government consists of a subset of the individuals in the society the competence level of the government in office determines collective utilities e g by determining the amount and quality of public goods and each individual derives additional utility from being part of the government e g rents from holding office we characterize the dynamic evolution of governments and determine the structure of stable governments which arise and persist in equilibrium in our model perfect democracy where current members of the government do not have veto power over changes in governments always leads to the emergence of the most competent government however any deviation from perfect democracy to any regime with incumbency veto power destroys this result there is always at least one other less competent government that is also stable and can persist forever and even the least competent government can persist forever in office we also show that there is a nonmonotonic relationship between the degree of incumbency veto power and the quality of government in contrast in the presence of stochastic shocks or changes in the environment a regime with less incumbency veto power has greater flexibility and greater probability that high competence governments will come to power this result suggests that a particular advantage of democratic regimes with a limited number of veto players may be their greater adaptability to changes rather than their performance under given conditions finally we show that royalty like dictatorships may be more successful than junta like dictatorships because in these regimes veto players are less afraid of change

farsighted coalitional stability abstract i define the largest consistent set a solution concept which applies to situations in which coalitions freely form but cannot make binding contracts act publicly and are fully farsighted in that a coalition considers the possibility that once it acts another coalition might react a third coalition might in turn react and so on without limit i establish weak nonemptiness conditions and apply it to strategic and coalitional form games and majority rule voting i argue that it improves on the von neumann morgenstern stable set as it is usually defined but is consistent with a generalization of the stable set as in the theory of social situations journal of economic literature classification numbers c70 c71

determinants of college major choice identification using an information experiment this article studies the determinants of college major choice using an experimentally generated panel of beliefs obtained by providing students with information on the true population distribution of various major specific characteristics students logically revise their beliefs in response to the information and their subjective beliefs about future major choice are associated with beliefs about their own earnings and ability we estimate a rich model of college major choice using the panel of beliefs data while expected earnings and perceived ability are a significant determinant of major choice heterogeneous tastes are the dominant factor in the choice of major analyses that ignore the correlation in tastes with earnings expectations inflate the role of earnings in college major choices we conclude by computing the welfare gains from the information experiment and find positive average welfare gains

does voluntary participation undermine the coase theorem abstract the coase theorem states that costless enforcement of voluntary agreements yields efficient outcomes we argue that previous treatments fail to recognize the full meaning of voluntary it requires a two stage game a non cooperative participation decision followed by coaseian bargaining only among those who choose to participate we illustrate this in a simple public goods model and find outcomes ranging from extremely inefficient to fully efficient however the efficient equilibrium is not robust to even very small transaction costs thus we cast doubt on coaseian claims of universal efficiency finally we outline a kind of coercion that restores efficiency

climate cooperation with technology investments and border carbon adjustment a central question in climate policy is whether early investments in low carbon technologies are a useful first step towards a more effective climate agreement in the future we introduce a climate cooperation model with endogenous r d investments where countries protect their international competitiveness via border carbon adjustments bca bca raises the scope for cooperation and leads to a non trivial relation between countries prior r d investments and participation in the coalition we find that early investments in r d render free riding more attractive therefore with delayed cooperation on emission abatement and ex ante r d investments the outcome is often characterized by high participation but inefficiently low technology investments and abatement

mistakes in cooperation the stochastic stability of edgeworth s recontracting in an exchange economywith a finite number of indivisible goods we analyze a dynamic trading process of coalitional recontracting where agents may make mistakes with small probability we show first that the recurrent classes of the unperturbed mistake free process consist of i all core allocations as absorbing states and ii cycles of non core allocations next we introduce a perturbed process where the resistance of each transition is a function of the number of agents that make mistakes do not improve in the transition and of the seriousness of each mistake if preferences are always strict we show that the unique stochasticallystable state of the perturbed process is the walrasian allocation in economies with indifferences non core cycles are sometimes stochastically stable while some core allocations are not

allocating value among farsighted players in network formation we study the stability of networks when players are farsighted and allocations are determined endogenously the set of strongly efficient networks is the unique von neumann morgenstern farsightedly stable set with bargaining if the value function is anonymous component additive and top convex and the allocation rule is anonymous and component efficient moreover the componentwise egalitarian allocation rule emerges endogenously

dynamic mechanism design for a global commons we model dynamic mechanisms for a global commons countries value both consumption and conservation of an open access resource a country s relative value of consumption to conservation is privately observed and evolves stochastically an optimal quota maximizes world welfare subject to being implementable by perfect bayesian equilibria with complete information the optimal quota is first best it allocates more of the resource each period to countries with high consumption value under incomplete information the optimal quota is fully compressed identical countries receive the same quota even as environmental costs and resource needs differ this is true even when private information is negligible

negotiating a uniform emissions tax in international environmental agreements abstract a consensus appears to be emerging that a global carbon tax is the best policy for managing greenhouse gas emissions emissions tax systems are relatively straightforward cost effective and can generate revenues used to offset other distortionary taxes moreover recent theoretical research weitzman 2014 has demonstrated that under some conditions the globally efficient tax rate can be implemented through a majority voting rule we extend this area of research by examining a uniform emissions tax system in the framework of an international environmental agreement in which only countries that voluntarily participate are subject to the tax we show that in the simplest situation in which countries have identical marginal benefit and cost functions the largest stable agreement consists of two countries and the tax system has little impact on abatement levels our analysis highlights that by ignoring the participation decision and assuming commitment by all parties the efficiency gains from a uniform emissions tax system are overstated

voting for voters a model of electoral evolution we model the decision problems faced by the members of societies whose new members are determined by vote we adopt a number of simplifying assumptions the founders and the candidates are fixed the society operates for k periods and holds elections at the beginning of each period one vote is sufficient for admission and voters can support as many candidates as they wish voters assess the value of the streams of agents with whom they share the society while they belong to it in spite of these simplifications we show that interesting strategic behavior is implied by the dynamic structure of the problem the vote for friends may be postponed and it may be advantageous to vote for enemies we discuss the existence of different types of equilibria in pure strategies and point out interesting equilibria in mixed strategies

differentiated payroll taxes unemployment and welfare abstract this paper investigates the impact of payroll taxes on unemployment and welfare in a two sector economy characterised by imperfect competition in product and labour markets the two sectors differ in market competitiveness it turns out that only the relative tax pressure affects unemployment and welfare unemployment can be reduced by having the less competitive sector pay higher taxes moreover differentiated payroll taxes will in general improve efficiency which sector to tax relatively more is however not clear the government faces a trade off in the sense that unemployment is reduced only at the expense of reduced efficiency in the output mix

international environmental agreements with mixed strategies and investment abstract we modify a canonical participation game used to study international environmental agreements iea considering both mixed and pure strategies at the participation stage and including a prior cost reducing investment stage the use of mixed strategies at the participation stage reverses a familiar result and also reverses the policy implication of that result with mixed strategies equilibrium participation and welfare are higher in equilibria that involve higher investment

equilibrium binding agreements abstract we study equilibrium binding agreements the coalition structures that form under such agreements and the efficiency of the outcomes that result we analyze such agreements in a context where the payoff to each player depends on the actions of all other players thus a game in strategic form is a natural starting point unlike the device of a characteristic function explicit attention is paid to the behavior of the complementary set of players when a coalition blocks a proposed agreement a solution concept and its applications are discussed journal of economic literature classification numbers c70 c71

a theory of wage and promotion dynamics inside firms we show that a framework that integrates job assignment human capital acquisition and learning captures several empirical findings concerning wage and promotion dynamics inside firms including the following first real wage decreases are not rare but demotions are second wage increases are serially correlated third promotions are associated with large wage increases fourth wage increases at promotion are small relative to the difference between average wages across levels of the job ladder fifth workers who receive large wage increases early in their stay at one level of the job ladder are promoted quickly to the next

inefficiency in legislative policymaking a dynamic analysis this paper develops an infinite horizon model of public spending and taxation in which policy decisions are determined by legislative bargaining the policy space incorporates both productive and distributive public spending and distortionary taxation the productive spending is investing in a public good that benefits all citizens e g national defense and the distributive spending is district specific transfers e g pork barrel spending investment in the public good creates a dynamic linkage across policymaking periods the analysis explores the dynamics of legislative policy choices focusing on the efficiency of the steady state level of

do women shy away from competition do men compete too much we examine whether men and women of the same ability differ in their selection into a competitive environment participants in a laboratory experiment solve a real task first under a noncompetitive piece rate and then a competitive tournament incentive scheme although there are no gender differences in performance men select the tournament twice as much as women when choosing their compensation scheme for the next performance while 73 percent of the men select the tournament only 35 percent of the women make this choice this gender gap in tournament entry is not explained by performance and factors such as risk and feedback aversion only playa negligible role instead the tournament entry gap is driven by men being more overconfident and by gender differences in preferences for performing in a competition the result is that women shy away from competition and men embrace it

buy coal a case for supply side environmental policy free riding is at the core of environmental problems if a climate coalition reduces its emissions world prices change and nonparticipants typically emit more they may also extract the dirtiest type of fossil fuel and invest too little in green technology the coalition s second best policy distorts trade and is not time consistent however suppose that the countries can trade the rights to exploit fossil fuel deposits as soon as the market clears the above mentioned problems vanish and the first best is implemented in short the coalition s best policy is to simply buy foreign deposits and conserve them

a model of agreements in strategic form games abstract because in a strategic form game all the possibilities of communication available to the players must be explicitly listed in the strategy spaces coalitions and coalitional behaviour are not very often taken into account in noncooperative games however it may be desirable especially in applications to separate the basic strategic features of a situation from those strategic features added as a consequence of the possibility of coalitional behaviour we define an equilibrium for the bargaining procedure called by greenberg the theory of solid situations an alternative game theoretic approach cambridge university press cambridge uk 1990 coalitional contingent threat situation we argue that the crucial problem of expectations on the counterdeviations following a deviation can be addressed by defining coalitional strategies and studying the equilibrium of the extended game journal of economic literatureclassification numbers c70 c71

dynamic effects on the stability of international environmental agreements abstract in terms of the number of signatories one observes both large and small international environmental agreements the theoretical literature based on game theory discusses different concepts and mechanisms regarding stability of coalitions the conclusion has been reached that in all circumstances under farsightedness both large and small stable coalitions can occur this theory is based on behavioural reaction patterns but does not take account of the interaction with the dynamics of emission adjustments this paper shows that when these two dynamical processes are integrated large and small stable coalitions can still occur but only if the costs of emissions are relatively unimportant as compared with the costs of abatement

limited farsightedness in network formation pairwise stability jackson and wolinsky 1996 is the standard stability concept in network formation it assumes myopic behavior of the agents in the sense that they do not forecast how others might react to their actions assuming that agents are perfectly farsighted related stability concepts have been proposed we design a simple network formation experiment to test these extreme theories but find evidence against both of them the subjects are consistent with an intermediate rule of behavior which we interpret as a form of limited farsightedness on aggregate the selection among multiple pairwise stable networks and the performance of farsighted stability crucially depends on the level of farsightedness needed to sustain them and not on efficiency or cooperative considerations individual behavior analysis corroborates this interpretation and suggests in general a low level of farsightedness around two steps on the part of the agents

equity development and climate change control the paper analyzes the effects of different equity principles on the decision of developing countries to join a world coalition whose aim is to control greenhouse gas emissions a game theoretic framework is proposed to assess the incentives for different countries to sign an international treaty on climate change control then the effects of different equity rules on these incentives are evaluated by using a dynamic integrated growth and climate model policy proposals based on transfers from developed to developing countries are also analyzed jel c7 h0 h3 q38

farsightedness changing stock location and the stability of international fisheries agreements changes in stock location may affect the stability of international fisheries agreements this paper offers a theoretical analysis of the stability of regional fisheries management organisations rfmos in a non cooperative coalition formation game based on the classic gordon schaefer model we employ a new stability concept which modifies farsighted stability chwe j econ theory 63 299 325 1994 we call this concept farsighted downwards stability fds we also employ the internal stability is concept for comparison analytical results regarding fds for symmetric players without changing stock location show stable grand coalitions for n le 4 player games and the possibility for partial cooperation sensitivity analysis deals with changing stock location and cost asymmetry stability decreases in n increases when costs are asymmetric and increases when fds is employed farsighted conjectures on behalf of rfmo members can thus help to maintain cooperation as stock location changes however fds is more sensitive to changes in stock location than is

coalition formation as a dynamic process abstract we study coalition formation as an ongoing dynamic process with payoffs generated as coalitions form disintegrate or regroup a process of coalition formation pcf is an equilibrium if a coalitional move to some other state can be justified by the expectation of higher future value compared to inaction this future value in turn is endogenous it depends on coalitional movements at each node we study existence of equilibrium pcfs we connect deterministic equilibrium pcfs with unique absorbing state to the core and equilibrium pcfs with multiple absorbing states to the largest consistent set in addition we study cyclical as well as stochastic equilibrium pcfs

why are the returns to schooling higher for women than for men many studies have found that the impact of schooling on earnings is greater for females than for males despite the fact that females tend to earn less both absolutely and controlling for personal characteristics this study investigates possible reasons for this effect using data from the national longitudinal survey of youth 1979 one explanation is that education appears to have a double effect on the earnings of women it increases their skills and productivity as it does with men and in addition it appears to reduce the gap in male and female earnings attributable to factors such as discrimination tastes and circumstances the latter appear to account for about half of the differential in the returns to schooling

cooperation on climate change mitigation abstract we analyze conditions under which it is possible to achieve efficient mitigation of greenhouse gas emissions with a self enforcing international agreement in which all countries find it in their self interest to abide by the agreement we model the choice of emissions by countries as a dynamic game we use a two part punishment scheme for deviations from an agreement that is renegotiation proof and show when this scheme supports the efficient outcome as a subgame perfect equilibrium using numerical examples we show that an efficient subgame perfect equilibrium exists for a range of reasonable parameter values the existence of such equilibrium may be non monotonic in the discount rate and the ratio of slope of marginal abatement cost and marginal damages

a dynamic theory of public spending taxation and debt this paper presents a dynamic political economy theory of public spending taxation and debt policy choices are made by a legislature consisting of representatives elected by geographically defined districts the legislature can raise revenues via a distortionary income tax and by borrowing these revenues can be used tofinance a national public good and district specific transfers interpreted as pork barrel spending the value of the public good is stochastic reflecting shocks such as wars or natural disasters in equilibrium policy making cycles between two distinct regimes business as usual in which legislators bargain over the allocation of pork and responsible policy making in which policies maximize the collective good transitions between the two regimes are brought about by shocks in the value of the public good in the long run equilibrium tax rates are too high and too volatile public good provision is too low and debt levels are too high in some environments a balanced budget requirement can improve citizen welfare

after kyoto alternative mechanisms to control global warming after more than a decade of negotiations and planning under the framework convention on climate change fccc the first binding international agreement to control the emissions of greenhouse gases has come into effect in the kyoto protocol the first budget period of 2008 2012 is at hand moreover the scientific evidence on greenhouse warming strengthens steadily as observational evidence of warming accumulates the institutional framework of the protocol has taken hold solidly in the european union s emissions trading scheme ets which covers almost half of europe s carbon dioxide emissions notwithstanding this apparent success the kyoto protocol is widely seen as somewhere between troubled and terminal early troubles came with the failure to include the major developing countries along with lack of an agreedupon mechanism to include new countries and extend the agreement to new periods the major blow came when the united states withdrew from the treaty in 2001 by 2002 the protocol covered only 30 percent of global emissions while the hard enforcement mechanism in the ets accounts for about 8 percent of global emissions even if the current protocol is extended models indicate that it will have little impact on global temperature change unless there is a dramatic breakthrough or a new design the protocol threatens to be seen as a monument to institutional overreach nations are now beginning to consider the structure of climate change policies for the period after 2008 to 2012 some countries states cities companies and even universities are adopting their own climate change policies are there in fact alternatives to the scheme of tradable emissions permits embodied in the protocol the fact is that alternative approaches have not had a serious hearing among natural scientists or among policymakers what are some alternatives for global public goods there are three potential approaches command and control regulation quantity oriented market approaches and taxor price based regimes of these only the tradable quantity and the price like regimes have any hope of being reasonably efficient under a tradable quantity approach an agreement proceeds by setting limits on emissions by different countries the limits are partially or wholly transferable among countries this is the approach taken under the kyoto protocol this approach has very limited international experience under existing protocols such as the cfc chlorofluorocarbon mechanisms and somewhat broader experience under national trading regimes such as the u s sulfur dioxide regime a radically different approach is to use harmonized prices fees or taxes as a method of coordinating policies among countries this approach has no international experience in the environmental area although it has modest experience nationally in such areas as the u s tax on ozone depleting chemicals on the other hand the use of harmonized price type measures has extensive international experience in fiscal and trade policies such as with the harmonization of taxes in the european union and harmonized tariffs in international trade these thoughts on the structure of international agreements to control global warming should not be regarded as negotiating strategies

domestic policies national sovereignty and international economic institutions to what extent must nations cede control over their economic and social policies if global efe ciency is to be achieved in an interdependent world this question is at the center of the debate over the future role of the wto formerly gatt in the realm of labor and environmental standards in this paper we establish that the market access focus of current wto rules is well equipped to handle the problems associated with choices over labor and environmental standards in principle with relatively modest changes that grant governments more sovereignty not less these rules can deliver globally efe cient outcomes i introduction to what extent must nations cede control over their economic and social policies if global efe ciency is to be achieved in an interdependent world at a broad level this question probes the limits of any international economic institution whether geared toward real or e nancial concerns that is designed to promote global efe ciency while respecting national sovereignty naturally the answer depends upon the particular problem that the institution is meant to solve in other words the answer depends upon the inefe ciency that would arise under unilateral policy choices at a more specie c level this question is at the center of the debate concerning the appropriate scope of the world trade organization wto formerly gatt recently member countries have considered ways to broaden the wto s orientation beyond conventional trade policy measures to include labor and environmental standards there are now initiatives to introduce the issue of labor standards directly onto the negotiating agenda of the wto with the purpose of creating a wto social clause the social clause would specify a set of minimum international labor standards and then permit restrictions to be placed against imports from countries not complying with these minimum standards with regard to environmental policies a wto committee on trade and environment has been established to identify the relationships between trade and environmental measures and to

the sports business as a labor market laboratory with superior data on compensation and productivity as well as the occurrence of abrupt dramatic market structure and player allocation rules changes sports labor markets offer an excellent setting in which to test economic hypotheses this paper reviews evidence from sports in four areas employer monopsony discrimination the coase theorem and incentive contracts supervision and performance there is considerable evidence of monopsony as well as for the existence of some forms of discrimination against minority athletes incentive contracts have strong effects on player performance and behavior and there is mixed evidence on the predictions of the coase theorem

career choices and the evolution of the college gender gap the opportunity cost for men of pursuing a college degree has been rising due to the increase in the rewards to becoming a superstar in occupations typically dominated by men like professional spo

climate contracts a game of emissions investments negotiations and renegotiations the paper presents a dynamic game where players can contribute to a public bad invest in technologies and write incomplete contracts despite the n 1 stocks in the model the analysis is tractable and the symmetric markov perfect equilibrium unique the framework helps to analyze emissions investments and international environmental agreements if only the emission levels are contractible then investments are suboptimally small if the contract is short term or close to its expiration date to encourage investments the optimal contract is more ambitious if it is short term and it is tougher to satisfy close to its expiration date and for countries with small investment costs if renegotiation is possible such an incomplete contract implements the rst best the results have important lessons for how to design a climate treaty

stable farsighted coalitions in competitive markets in this paper we study dynamic alliance formation among agents in competitive markets we look at n agents selling substitutable products competing in a market in this setting we examine models with deterministic and stochastic demand and we use a two stage approach in stage 1 agents form alliances coalitions and in stage 2 coalitions make decisions price and inventory and compete against one another to analyze the stability of coalition structures in stage 1 we use two notions from cooperative games the largest consistent set lcs and the equilibrium process of coalition formation epcf which allow players to be farsighted thus in forming alliances players consider two key phenomena first players trade off the size of the total profit of the system versus their allocation of this total pie and second they weigh the possibility that an immediate beneficial defection can trigger further counter defections that in the end may prove to be worse than the status quo in particular one such example is that of the grand coalition which we show to be stable in the farsighted sense even though players benefit myopically by defecting from it we also provide conditions under which a situation of a few lone players competing against a large coalition is stable we examine the impact of the size of the market n the degree of competition the effect of cost parameters and the variability of the demand process on the prices inventory levels and structure of the market we discuss the possible strategic implications of our results to firms in a competitive market and for new entrants

contracting on time the paper shows how the time considerations especially those concerning contract duration affect incomplete contract theory time is not only a dimension along which the relationship unfolds but also a continuous verifiable variable that can be included in contracts we consider a bilateral trade setting where contracting investment trade and renegotiation take place in continuous time we show that efficient investment can be induced either through a sequence of constantly renegotiated fixed term contracts or through a renegotiation proof evergreen contract a perpetual contract that allows unilateral termination with advance notice we provide a detailed analysis of properties of optimal contracts

farsightedness in a coalitional great fish war we explore the implications of the farsightedness assumption on the conjectures of players in a coalitional great fish war model with symmetric players derived from the seminal model of levhari and mirman bell j econ 11 649 661 1980 the farsightedness assumption for players in a coalitional game acknowledges the fact that a deviation from a single player will lead to the formation of a new coalition structure as the result of possibly successive moves of her rivals in order to improve their payoffs it departs from mainstream game theory in that it relies on the so called rational conjectures as opposed to the traditional nash conjectures formed by players on the behavior of their rivals for values of the biological parameter and the discount factor more plausible than the ones used in the current literature the farsightedness assumption predicts a wide scope for cooperation in non trivial coalitions sustained by credible threats of successive deviations that defeat the shortsighted payoff of any prospective deviator compliance or deterrence of deviations may also be addressed by acknowledging that information on the fish stock or on the catch policies actually implemented may be available only with a delay dynamic farsightedness in that case the requirements are stronger and the sizes and number of possible farsighted stable coalitions are different in the sequential move version which could mimic some characteristics of fishery models the results are not less appealing even if the dominant player or dominant coalition with first move advantage assumption provides a case for cooperation with the traditional nash conjectures

unimprovable allocations in economies with incomplete information abstract the paper considers an exchange economy with incomplete information in which agents can retrade goods until all gains from trade are exhausted unimprovable allocations are defined to be those allocations from which agents would not wish to deviate either by retrading goods or by revealing further information the concept of unimprovability is then used to analyze a lemons market and an adverse selection insurance market in which agents can renegotiate after information has been revealed finally unimprovability is compared to different concepts of efficiency and to the concept of durability journal of economic literature classification number d82

optimal fiscal policy in open economies with labour market distortions abstract we set up a general equilibrium model with unemployment owing to distortions in the labour market it is shown that a public expansion financed by a distortionary income tax may give rise to a decrease in unemployment even if public goods are pure waste such an expansion may give rise to an increase in welfare if it is associated with a decrease in unemployment since part of the gain from a fiscal expansion is achieved at the expense of welfare in other countries non cooperative policies tend to be too expansionary

vertical integration with endogenous contract leadership stability and fair profit allocation abstract this paper studies vertical integration in serial supply chains with a wholesale price contract we consider a business environment where the contracting leader may be endogenously changed before and after forming the integration a cooperative game is formulated to normatively analyze the stable and fair profit allocations under the grand coalition in such an environment our main result demonstrates that vertical integration is stable when all members are pessimistic in the sense that they are sure that they will not become the contracting leader if they deviate from the grand coalition we find that in this case the grand coalition s profit must be allocated more to the retailer and the members with higher costs nevertheless we also show the conditions under which the upstream manufacturer can have strong power as in traditional supply chains

climate treaties and breakthrough technologies an effective climate change treaty must promote the joint supply of two global public goods climate change mitigation and knowledge of new technologies that can lower mitigation costs r d is especially needed to bring about substantial long term reductions in atmospheric concentrations of greenhouse gases for this will require the development and diffusion of revolutionary breakthrough technologies martin i hoffert et al 2002 in principle such an outcome could be realized by the kyoto protocol approach if that agreement were strengthened over time however that response may be inadequate kyoto makes no provision for r d and as i shall demonstrate unlikely to succeed can a treaty system relying directly on targeted r d and the adoption of breakthrough technologies perform better in this same setting of anarchic international relations i will show that as a general rule the answer is no essentially the same forces that undermine kyoto also challenge the r d and technology approach there is one exception to this rule r d leading to breakthrough technologies exhibiting increasing returns can improve dramatically on the kyoto approach even when these technologies are otherwise inferior to the alternatives available this suggests that our approach to treaty design should be strategic

formation of alliances in internet based supply exchanges in different industries such as automobiles chemicals or retailing competitors are joining forces in establishing electronic marketplaces to reduce inefficiencies in the purchasing process and cut costs by combining their buying power joining such an alliance leads to reduced costs including those of possible rivals because members share the development and operating costs a company that joins an alliance agrees to share its suppliers with others which may lead to more intense competition among the increased number of suppliers and it may further benefit an alliance member at the expense of companies left outside the alliance natural questions that could arise then are when would a firm prefer to take part in an electronic marketplace joint venture when would it prefer that other firms possibly rivals join the venture and what are the financial consequences of either joining an alliance or remaining independent in an attempt to gain a better understanding of the issues we have developed a model of three retailers whose products may have a certain degree of substitutability we provide some conditions in terms of product substitutability and compatibility of retailers that would lead to the formation of a three member alliance or a two member alliance or no alliance at all we also study the effect of alliance structure and compatibility of retailers on the profit of a company

estimating strategic models of international treaty formation this article develops an empirical framework for analysing the timing of international treaties a treaty is modelled as a dynamic game among governments that decide on participation in every period the net benefit of treaty membership increases over time spillovers among members and non members accelerate or delay treaty formation by transforming participation into a strategic complement or substitute respectively the predictions of the model inform the estimation of the structural parameters based on a cross section of treaty ratification dates with this approach i estimate the sign and magnitude of strategic interaction in the ratification of the montreal protocol in the formation of europe s preferential trade agreements and in the growth of germany s network of bilateral investment treaties through a series of counterfactual experiments i explore different mechanisms that give rise to strategic interaction in the formation of these treaties

do investments in specialized knowledge lead to composite good industries we try to understand why firms producing goods by means of complementary components do not merge especially in industries in which investments in component based knowledge matters as audretsch we state that these activities are developed by individuals who do their best to appropriate the return from their knowledge and whose effort is non contractible the organization of the industry into firms is identified to a partition of the set of individuals in this context we prove that an organization in which each individual hold his own firms is both stable with respect to unilateral deviation and optimal in the line of the property right approach if the returns are high enough this structure is even the only one which shares both properties

gender competitiveness and career choices gender differences in competitiveness have been hypothesized as a potential explanation for gender differences in education and labor market outcomes we examine the predictive power of a standard laboratory experimental measure of competitiveness for the later important choice of academic track of secondary school students in the netherlands although boys and girls display similar levels of academic ability boys choose substantially more prestigious academic tracks where more prestigious tracks are more math and science intensive our experimental measure shows that boys are also substantially more competitive than girls we find that competitiveness is strongly positively correlated with choosing more prestigious academic tracks even conditional on academic ability most important we find that the gender difference in competitiveness accounts for a substantial portion about 20 of the gender difference in track choice

participation games and international environmental agreements a non parametric model abstract we examine the size of stable coalitions in a participation game that has been used to model international environmental agreements cartel formation rd based on these examples a consensus has emerged that in this kind of game the equilibrium coalition size is small except possibly when the potential benefits of cooperation are also small in this paper we develop a non parametric approach to the problem and demonstrate that the conventional wisdom is not robust in a general setting we identify conditions under which the equilibrium coalition size can be large even when potential gains are large contrary to previously examined leading special cases we show that reductions in marginal abatement costs in an international environmental game can increase equilibrium membership and we provide a measure of the smallest reduction in costs needed to support a coalition of arbitrary size

duration to first job and the return to schooling estimates from a search matching model this paper investigates the properties of the joint distribution of the duration to the first post schooling full time job and of the accepted wage for that job within a search matchingbargaining theoretic model the model provides an interpretation of the observations on duration to first job and accepted wages that differentiates between behavioural influences and market fundamentals in determining the accepted wage schooling relationship the return to schooling is appropriately measured by differences in the wage offer distribution which depends only on market fundamentals we use data from the 1979 youth cohort of the national longitudinal surveys of labor market experience to follow several school leaving cohorts of young males a model which allows for five types of heterogeneous workers within schooling race groups fits the duration and wage data well for all such groups offer probabilities for all groups are estimated to be close to one mean offered wages are about 1000 less than mean accepted wages and the internal annual rate of return for attending college relative to graduating from high school is 32 for blacks and 17 for whites this paper investigates the properties of the joint distribution of the duration to the first post schooling full time job and of the accepted wage for that job within a search matching bargaining model it is a well established empirical regularity that hazard rates are decreasing with the duration of search unemployment it is also true for the data we use that the sample mean of the accepted wage associated with the first job is not increasing with duration these findings hold for both black and white male youth at all levels of schooling conditional on schooling however the time between leaving school and working at the first full time job is longer for blacks and their accepted mean wage is lower conditional on race the time between leaving school and working at the first full time job is shorter for those with higher levels of schooling and their accepted mean wage is higher interestingly blacks display a similar pattern of duration and accepted wages to whites who are one level of schooling below e g black high school graduates and white high school dropouts

the private provision of excludable public goods an inefficiency result abstract does voluntary contracting suffice for the efficient provision of excludable public goods even in a complete information environment we find that the answer is negative the reason is that some agents may profit from not participating at the provision stage but instead negotiate access ex post

dynamics and stability of constitutions coalitions and clubs a central feature of dynamic collective decision making is that the rules that govern the procedures for future decision making and the distribution of political power across players are determined by current decisions for example current constitutional change must take into account how the new constitution may pave the way for further changes in laws and regulations we develop a general framework for the analysis of this class of dynamic problems under relatively natural acyclicity assumptions we provide a complete characterization of dynamically stable states as functions of the initial state and determine conditions for their uniqueness we show how this framework can be applied in political economy coalition formation and the analysis of the dynamics of clubs the explicit characterization we provide highlights two intuitive features of dynamic collective decision making 1 a social arrangement is made stable by the instability of alternative arrangements that are preferred by sufficiently many members of the society 2 efficiency enhancing changes are often resisted because of further social changes that they will engender

participation and duration of environmental agreements we analyze participation in international environmental agreements in a dynamic game in which countries pollute and invest in green technologies if complete contracts are feasible participants eliminate the holdup problem associated with their investments however most countries prefer to free ride rather than participate if investments are noncontractible countries face a holdup problem every time they negotiate but the free rider problem can be mitigated and significant participation is feasible participation becomes attractive because only large coalitions commit to long term agreements that circumvent the holdup problem under well specified conditions even the first best outcome is possible when the contract is incomplete

the structure of the climate debate first best climate policy is a uniform carbon tax which gradually rises over time civil servants have complicated climate policy to expand bureaucracies politicians to create rents environmentalists have exaggerated climate change to gain influence other activists have joined the climate bandwagon opponents to climate policy have attacked the weaknesses in climate research the climate debate is convoluted and polarized as a result and climate policy complex climate policy should become easier and more rational as the paris agreement has shifted climate policy back towards national governments changing political priorities austerity and a maturing bureaucracy should lead to a more constructive climate debate

coalition bargaining in repeated games we consider an intertemporal game theoretic framework in which different coalitions interact repeatedly over time both the terms of trade and the endogenous cooperation structure arising in this setup are characterized in a protocol free manner provided that just three natural conditions on the outcome are satisfied c1 a coalition is formed with positive probability if and only if the shares obtained in this case by its members weakly exceed their respective share expectations c2 each matched coalition distributes the entire surplus among its members c3 members of any coalition are treated symmetrically with respect to their share expectations when the surplus of this coalition is distributed our analysis primarily focuses on the limit scenario where the game ends each date with vanishing probability we show that in this case the cooperation structure and the shares are unique in an application to trade networks we show that in a complete network a unique price arises and agents specialize in either buying or selling in an incomplete network on the other hand transactions occur generally at multiple prices and some agents become arbitrageurs that buy and sell at different prices

performance in competitive environments gender differences even though the provision of equal opportunities for men and women has been a priority in many countries large gender differences prevail in competitive high ranking positions suggested explanations include discrimination and differences in preferences and human capital in this paper we present experimental evidence in support of an additional factor women may be less effective than men in competitive environments even if they are able to perform similarly in non competitive environments in a laboratory experiment we observe as we increase the competitiveness of the environment a significant increase in performance for men but not for women this results in a significant gender gap in performance in tournaments while there is no gap when participants are paid according to piece rate this effect is stronger when women have to compete against men than in single sex competitive environments this suggests that women may be able to perform in competitive environments per se

macroeconomic implications of cash limits in the public sector a cash limit is a fixed amount of money available for pay prior to the wage negotiations in the public sector this paper examines the macroeconomic implications of cash limits in a unionized economy with decentralized wage bargaining in both private and public sectors i focus in particular on the linkages between changes in the cash limit wage setting and employment in public and private sectors equilibrium unemployment is independent of the size of the public sector if there are no sectoral differences in the unions relative bargaining power in general unemployment may rise or fall by public sector expansion accomplished by means of an increase in the cash limit unemployment increases if unions are relatively more powerful in the public than in the private sector

climate agreements in a mitigation adaptation game abstract we analyze the strategic interaction between mitigation public good and adaptation private good strategies in a climate agreement we show the fear that adaptation will reduce the incentives to mitigate carbon emissions may be unwarranted adaptation can lead to larger self enforcing agreements associated with higher global mitigation levels and welfare if it causes mitigation levels between different countries to be no longer strategic substitutes but complements we argue that our results extend to many public goods the well known problem of easy riding may turn into easy matching if the marginal utility of public good consumption is strongly influenced by private consumption

how responsive is investment in schooling to changes in redistributive policies and in returns this paper uses an unusual pay reform to test the responsiveness of investment in schooling to changes in redistribution schemes that increase the rate of return to education we exploit an episode where different israeli kibbutzim shifted from equal sharing to productivity based wages in different years and find that students in kibbutzim that reformed earlier invested more in high school education and in the long run also in post secondary schooling we further show that the effect is mainly driven by students in kibbutzim that reformed to a larger degree our findings support the prediction that education is highly responsive to changes in the redistribution policy

international aspects of pollution control pollution is a by product of production is only gradually dissolved by the environment and crosses national borders the market outcome ignores the adverse effects of pollution and thus yields higher levels of output and pollution than would prevail under a supranational social planner which does care about pollution in practice governments often do not cooperate and this leads to outcomes of pollution and production in between the market outcomes and the outcomes under supra national social planning absence of precommitment leads to lower emission charges less cleaning up activities and more pollution appropriate levels of emission charges under the various outcomes are a result of this analysis attention is also paid to investment in clean technology the debate between optimists who believe that higher production is compatible with sound environmental policy and pessimists can be analysed in this way