political cycles and economic performance in oecd countries empirical evidence from 1951 2006 this paper examines whether electoral motives and government ideology influence short term economic performance i employ data on annual gdp growth in 21 oecd countries over the 1951 2006 period and provide a battery of empirical tests in countries with two party systems gdp growth is boosted before elections and under leftwing governments in the first two years of a legislative period these findings indicate that political cycles are more prevalent in two party systems because voters can clearly punish or reward political parties for governmental performance my findings imply that we need more elaborate theories of how government ideology and electoral motives influence short term economic performance

do soccer players play the mixed strategy nash equilibrium mixed strategy nash equilibrium msne is a commonly used solution concept in game theoretic models in various fields in economics management and other disciplines but the experimental results whether the msne predicts well actual play in games is mixed consequently the evidence for naturally occurring games in which the msne predicts the outcome well is of great importance as it can justify the vast use of msne in models the game between the kicker and the goalkeeper in soccer penalty kicks is a real world game that can be used to examine the application of the msne concept or its accuracy because payoffs are a common knowledge the players have huge incentives to play correctly the game is simple enough to analyse its nash equilibrium is in mixed strategies and players actions can be observed we collected and analysed the data on the direction of kicks and jumps in penalty kicks in various top leagues and tournaments our analysis suggests that the msne predictions are the closest to the act

information percolation with equilibrium search dynamics we solve for the equilibrium dynamics of information sharing in a large population each agent is endowed with signals regarding the likely outcome of a random variable of common concern individuals choose the effort with which they search for others from whom they can gather additional information when two agents meet they share their information the information gathered is further shared at subsequent meetings and so on equilibria exist in which agents search maximally until they acquire sufficient information precision and then search minimally a tax whose proceeds are used to subsidize the costs of search improves information sharing and can in some cases increase welfare on the other hand endowing agents with public signals reduces information sharing and can in some cases decrease welfare

the relative contributions of private information sharing and public information releases to information aggregation we calculate learning rates when agents are informed through public and private observation of other agents actions we characterize the evolution of the distribution of posterior beliefs if the private learning channel is present convergence of the distribution of beliefs to the perfect information limit is exponential at a rate equal to the sum of the mean arrival rate of public information and the mean rate at which individual agents are randomly matched with other agents if however there is no private information sharing then convergence is exponential at a rate strictly lower than the mean arrival rate of public information c 2009 elsevier inc all rights reserved

expressive vs strategic voters an empirical assessment abstract leading theories of how voters choose between candidates are rooted in two very different paradigms with starkly different behavioral implications exploiting the incentive structure of germany s electoral system i develop a novel set of empirical tests that pit the canonical pivotal voter model against alternative accounts according to which individuals derive expressive utility from supporting their most preferred candidate the results show that neither paradigm can explain the most salient features of the data in addition the evidence suggests that voters cannot be neatly categorized into sincere and strategic types

learning from prices public communication and welfare we study the effect of releasing public information about productivity or monetary shocks using a micro founded macroeconomic model in which agents learn from the distribution of nominal prices while a public release has the direct beneficial effect of providing new information it also has the indirect adverse effect of reducing the informational efficiency of the price system we show that the negative indirect effect can dominate thus the public information release may increase uncertainty about the monetary shock and reduce welfare we find that the optimal communication policy is always to release either all or none of the information

testing mixed strategy equilibria when players are heterogeneous the case of penalty kicks in soccer the concept of mixed strategy is a fundamental component of game theory and its normative importance is undisputed however its empirical relevance has sometimes been viewed with skepticism the main concern over the practical usefulness of mixed strategies relates to the indifference property of a mixedstrategy equilibrium in order to be willing to play a mixed strategy an agent must be indifferent between each of the pure strategies that are played with positive probability in the mixed strategy as well as any combination of those strategies given that the agent is indifferent across these many strategies there is no bene t to selecting precisely the strategy that induces the opponent to be indifferent as required for equilibrium why an agent would in the absence of communication between players choose exactly one particular randomization is not clear of course whether agents in real life actually play nash equilibrium mixed strategies is ultimately an empirical question the evidence to date on this issue is based almost exclusively on laboratory experiments e g barry o neill 1987 amnon rapoport and richard b boebel 1992 dilip mookherjee and barry sopher 1994 jack ochs 1995 kevin a mccabe et al 2000 the results of these experiments are mixed o neill 1987 concludes that his experimental evidence is consistent with nash mixed strategies but that conclusion was contested by james n brown and robert w rosenthal 1990 with the exception of mccabe et al 2000 which looks at a three person game the other papers generally reject the nash mixedstrategy equilibrium while much has been learned in the laboratory there are inherent limitations to such studies it is sometimes argued that behavior in the simpli ed arti cial setting of games played in such experiments need not mimic real life behavior in addition even if individuals behave in ways that are inconsistent with optimizing behavior in the lab market forces may discipline such behavior in the real world finally interpretation of experiments rely on the assumption that the subjects are maximizing the monetary outcome of the game whereas there may be other preferences at work among subjects e g attempting to avoid looking foolish that distort the results tests of mixed strategies in nonexperimental data are quite scarce in real life the games played are typically quite complex with large strategy spaces that are not fully speci ed ex ante in addition preferences of the actors may not be perfectly known we are aware of only one paper in a similar spirit to our own research using data from classic tennis matches mark walker and john wooders 2001 test whether the probability the player who serves the ball wins the point is equal for serves to the right and chiappori department of economics university of chicago 1126 east 59th street chicago il 60637 levitt department of economics university of chicago groseclose graduate school of business stanford university 518 memorial way stanford ca 94305 the paper was presented at games 2000 in bilbao and at seminars in paris and chicago we thank d braun j m conterno r guesnerie d heller d mengual p reny b salanie and especially j l ettori for comments and suggestions and m mazzocco and f bos for excellent research assistance any errors are ours 1 the theoretical arguments given in defense of the concept of mixed strategy equilibria relate either to puri cation john c harsanyi 1973 or to the minimax property of the equilibrium strategy in zero sum games for recent elaborations on these ideas see authur j robson 1994 and phil reny and robson 2001 2 the ultimatum game is one instance in which experimental play of subjects diverges substantially from the predicted nash equilibrium robert slonim and alvin e roth 1998 demonstrate that raising the monetary payoffs to experiment participants induces behavior closer to that predicted by theory although some disparity persists

exploitable actions of believers in the law of small numbers in repeated constant sum games abstract in repeated fixed pair constant sum games with unique equilibria in mixed strategies such as matching pennies the subgame perfect equilibrium is repeating the stage game mixed strategy equilibrium action in such games rational players avoid strategies that are exploitable in that current actions either deviate systematically from the equilibrium action probabilities or fail to be serially independent of past actions i revisit classic experiments and find that subjects actions are sometimes exploitable because they are serially dependent subjects have difficulty in producing serially independent actions and in recognizing serially dependent sequences due to a bias called local representativeness

rationality in extensive form games let us adopt the classical point of view that a theory of games is a description of rational behavior consequently equipped with a book entitled theory of games any individual in any strategic situation need only consult the book to make a rational decision one of the questions to address in this context is indeed whether or not strategies other than those provided by backward induction can ever appear in such a book in offering an answer we shall also explore the logical limits within which any theory of games must operate

a rejoinder to a commentary on does the fed contribute to a political business cycle jerry tempelman public choice 132 433 436 2007 claims that advances in macroeconomic theory and in the implementation of monetary policy make discretionary monetary policy preferable to a rules based system his supporting evidence is based on the performance of the fed during the volcker greenspan regimes his evidence is inappropriate and his conclusion supporting discretion over rules unwarranted

the loser s curse and information aggregation in common value auctions we consider an auction in which k identical objects of unknown value are auctioned off to n bidders the k highest bidders get an object and pay the k 1st bid bidders receive a signal that provides information about the value of the object we characterize the unique symmetric equilibrium of this auction we then consider a sequence of auctions a r with n r bidders and k r objects we show that price converges in probability to the true value of the object if and only if both k r and n r k r i e both the number of objects and the number of bidders who do not receive an object go to infinity

do professionals choke under pressure high rewards or the threat of severe punishment provide strong motivation but also create psychological pressure which might induce performance decrements by analyzing the performance of professional football players in penalty kick situations the paper provides empirical evidence for the existence of detrimental incentive effects two pressure variables are considered in particular 1 the importance of success and 2 the presence of spectators there are plenty of situations in which pressure arises in the workplace knowing how individuals perform under pressure conditions is crucial because it has implications for the design of the workplace and the design of incentive schemes

professionals play minimax the implications of the minimax theorem are tested using natural data the tests use a unique data set from penalty kicks in professional soccer games in this natural setting experts play a one shot two person zero sum game the results of the tests are remarkably consistent with equilibrium play in every respect i winning probabilities are statistically identical across strategies for players ii players choices are serially independent the tests have substantial power to distinguish equilibrium play from disequilibrium alternatives these results represent the first time that both implications of von neumann s minimax theorem are supported under natural conditions during the last few decades game theory has contributed to a reshaping of important aspects of the methodology of economics and other social sciences in a large part this is because the language concepts and techniques of non cooperative game theory have become central to many areas of the discipline undoubtedly studying the interaction of ideally rational players greatly aids our understanding of the behaviour of real individuals firms and other agents moreover as kreps 1991 remarks studying the former should aim at understanding the latter the point of game theory is to help economists understand and predict what will happen in economic social and political contexts theoretical contributions should thus feed back to empirical analysis however testing the implications of the theory has proven extremely difficult in the literature the primary reason is that many predictions often hinge on properties of the utility functions and the values of the rewards used even when predictions are invariant over classes of preferences data on rewards are seldom available in natural settings moreover there is often great difficulty in determining strategy sets and in measuring individuals choices effort levels and the incentive structures they face as a result even the most fundamental predictions of game theoretical models have not yet been supported empirically in real situations in view of the substantial problems associated with testing theoretical predictions using natural data many authors have been compelled to test them in experimental settings interestingly enough despite the controlled structure of experiments the results of many experiments during the last few decades typically reject the assumption that subjects are playing according to the theoretical implications of equilibrium play for instance a number of experiments have evaluated the empirical validity of von neumann s minimax theory for two person zero sum games a theory that occupies a central position in our understanding of strategic situations the results have been mixed and are often rather negative see for instance brown and rosenthal 1990 rapoport and boebel 1992 camerer 2003 and the references therein

political business cycles in the new keynesian model i know there s the myth of the autonomous fed nixon barked a quick laugh richard nixon talking to arthur burns on october 23 1969 just after burns s nomination to the fed had been announced 1 i d like to see another lowering of interest rates i think there s room to do that i can understand people worrying about inflation but i don t think that s the big problem now george h w bush interview with new york times june 24 1992 i introduction economic conditions before elections affect election outcomes 2 rational politicians who recognize this regularity may therefore be tempted to try to influence the economy in the quarters preceding an election date to maximize their chances of being reelected the literature on political business cycles pbc has developed models that rationalize economic fluctuations induced by political cycles nordhaus 1975 presented a model of opportunistic political cycles the party in power stimulates the economy before elections to improve its reelection probability others have observed that different parties may have different preferences over inflation and output or unemployment outcomes and therefore we should observe partisan political cycles hibbs 1977 was the first to introduce the partisan cycle model in which left wing parties were assumed to have at least one of the following a higher output target a higher inflation target or a higher relative weight on minimizing output rather than inflation deviations from the targets compared with right wing parties several papers test for the existence of opportunistic or partisan cycles in the united states alesina cohen and roubini 1992 and alesina roubini and cohen 1997 find only weak evidence of an opportunistic political cycle looking at m1 growth rates grier 1989 and beck 1987 instead find support for the effect of political variables on m1 growth rates for the 1960 1980 period but not on the mean level of the federal funds rate as discussed in drazen 2000a 2000b there is basically no evidence instead that political cycles matter for macroeconomic outcomes by looking at data on unemployment and output growth grier 2008 is a recent exception and only weak evidence for inflation empirical tests of the partisan cycle model alesina roubini and cohen 1997 faust and irons 1999 find partisan differences in output growth rates but no support for partisan cycles in inflation and monetary policy tests of pbc typically assume monetary policy as the main tool that is exploited by politicians to manipulate the economy these studies usually focus on comparing the level of inflation output money growth rates or interest rates across political cycles or they add a political dummy variable to the relevant regression and test its significance this paper offers a different approach the paper aims to empirically test various political business cycle theories adopting an optimizing new keynesian model with a monetary and fiscal policy mix as the main setting the inclusion of both fiscal and monetary policy is motivated by drazen 2000b 3 the new keynesian model is a baseline setting for the analysis of monetary policy but it has not been widely used to study pbc an advantage of this paper with respect to most of the previous pbc literature lies in the use of a general equilibrium framework this is in fact necessary when testing the importance of politically motivated policy choices to effectively control for differences in the macroeconomic conditions the set of shocks or the private sector expectations that prevail when the policy decision is taken the monetary and fiscal policy rule parameters as well as the parameters that reflect the frequency of price adjustment by firms and the steady state level of inflation are allowed to depend on the observed political regime

bargaining under incomplete information this paper presents and analyzes a bargaining model of bilateral monopoly under uncertainty under the bargaining rule proposed the buyer and the seller each submit sealed offers that determine whether the good in question is sold and the transfer price the nash equilibrium solution of this bargaining game implies an offer strategy of each party that is monotonic in its own reservation price and depends on its assessment of the opponent s reservation price issues of relative bargaining advantage and efficiency are examined for a number of special cases finally we discuss the appropriateness of the nash solution concept

electoral politics and monetary policy does the bank of canada contribute to a political business cycle in this paper i apply the work of abrams and iossifov public choice 129 249 262 2006 to monetary policy in canada to see if same political party affiliation is needed to produce evidence of political opportunism after modifying their analysis to maintain the time series consistency of their variables for canada i find that both an error correction model and a taylor rule reformulation of their test generate evidence consistent with same party political opportunism but only weakly so on the other hand i also find the presence of more traditional indicators of political influence in particular the data suggest that the election of a liberal party government a decrease in the degree of political competition and to a lesser extent the election of a minority government all positively influence the expansiveness of canadian monetary policy

reprint of information percolation in segmented markets we study equilibria of dynamic over the counter markets in which agents are distinguished by their preferences and information over time agents are privately informed by bids and offers investors differ with respect to information quality including initial information precision and also in terms of market connectivity the expected frequency of their bilateral trading opportunities we characterize endogenous information acquisition and show how learning externalities affect information gathering incentives more liquid markets lead to higher equilibrium information acquisition when the gains from trade and market duration are sufficiently large on the other hand for a small market duration the opposite may occur if agents vary sufficiently in terms of their market connectivity c 2014 published by elsevier inc

a commentary on does the fed contribute to a political business cycle abrams and iossifov 2006 find that during 1957 2004 monetary policy turned significantly more expansionary prior to u s presidential elections when the federal reserve chairman and the incumbent president belonged to the same political party however their long sample period obscures changes in trends during the period stemming from advances in macroeconomic theory and in the implementation of monetary policy indeed when one considers only the volcker greenspan era 1979 2004 there is insufficient evidence to accept the notion of a political business cycle effect

toward a strategic foundation for rational expectations equilibrium a step toward a strategic foundation for rational expectations equilibrium is taken by considering a double auction with n buyers and m sellers with interdependent values and affiliated private information if there are sufficiently many buyers and sellers and their bids are restricted to a sufficiently fine discrete set of prices then generically there is an equilibrium in nondecreasing bidding functions that is arbitrarily close to the unique fully revealing rational expectations equilibrium of the limit market with unrestricted bids and a continuum of agents in particular the large double auction equilibrium is almost efficient and almost fully aggregates the agents information

on the existence of a political monetary cycle this paper examines electoral influence on monetary policy as measured by ml money growth i find a significant four year electoral cycle in money growth even when controlling for the influence of interest rates income and budget deficits further the residual electoral cycle produces the income and inflation movements associated with the political business cycle when it is used in simulations of simple reduced form macro models the paper concludes by discussing the difficulties in rationalizing cyclical monetary policy with rational expectations

competing for loyalty the dynamics of rallying support abstract we consider a class of dynamic collective action problems in which either a single principal or two competing principals vie for the support of members of a group we focus on the dynamic problem that emerges when agents negotiate and commit their support to principals sequentially we show that competition reduces agents welfare with public goods or if and only if there are positive externalities on uncommitted agents and increases agents welfare with public bads we apply the model to the study of corporate takeovers vote buying and exclusive deals jel d42 d62 d72 d82 g34 h41

equilibrium play and adaptive learning in a three person centipede game the two person centipede game is one of the most celebrated paradoxes of backward induction in complete information extensive form games an experimental investigation of a three person centipede game shows that the paradoxical results are strongly affected by the size of the stakes when the number of players in the game is increased from two to three and the game is played for unusually high stakes with group composition being randomly changed from trial to trial the paradox is considerably weakened as players approach equilibrium play with multiple iterations of the stage game when the game is played with low stakes there is no evidence for equilibrium play or learning across iterations of the stage game an adaptive learning model that assumes updating of the individual probabilities of choice outperforms alternative static and dynamic models in accounting for the major results observed in the high stake experiment

rational expectations information acquisition and competitive bidding most rational expectations market equilibrium models are not models of price formation and naive mechanisms leading to such equilibria can be severely manipulable in this paper a bidding model is developed which has the market like features that bidders act as price takers and that prices convey information higher equilibrium prices convey more favorable information about the quality of the objects being sold than do lower prices bidders can benefit from trading only if they have a transactions motive or if they have access to inside information apart from exceptional cases prices are not fully revealing a two stage model is developed in which bidders may acquire information at a cost before bidding and for which the equilibrium price is fully revealing resolving a well known paradox

does the fed contribute to a political business cycle in contrast to findings of other studies evidence is presented to support the existence of a federal reserve induced political monetary cycle that corresponds to the u s presidential election cycle using various taylor rules we find support for the view that fed policy turns significantly more expansionary in the seven quarters prior to the election but only when the fed chair and incumbent presidential party have partisan affiliations

vote buying general elections we examine the consequences of vote buying assuming this practice were allowed and free of stigma two parties compete in a binary election and may purchase votes in a sequential bidding game via up front binding payments and or campaign promises platforms that are contingent on the outcome of the election we analyze the role of the parties and voters preferences in determining the winner and the payments to voters

neoclassical theory versus prospect theory evidence from the marketplace several experimental studies have provided evidence that suggest indifference curves have a kink around the current endowment level these results which clearly contradict closely held economic doctrines have led some influential commentators to call for an entirely new economic paradigm to displace conventional neoclassical theory e g prospect theory which invokes psychological effects this paper pits neoclassical theory against prospect theory by investigating data drawn from more than 375 subjects actively participating in a well functioning marketplace the pattern of results suggests that prospect theory adequately organizes behavior among inexperienced consumers but consumers with intense market experience behave largely in accordance with neoclassical predictions moreover the data are consistent with the notion that consumers learn to overcome the endowment effect in situations beyond specific problems they have previously encountered this transference of behavior across domains has important implications in both a positive and normative sense

backward induction in the wild evidence from sequential voting in the us senate in the us senate roll calls are held in alphabetical order we document that senators early in the order are less likely to vote with the majority of their own party than those whose last name places them at the end of the alphabet to speak to the mechanism behind this result we develop a simple model of sequential voting in which forward looking senators rely on backward induction in order to free ride on their colleagues estimating our model structurally we find that this form of strategic behavior is an important part of equilibrium play we also consider but ultimately dismiss alternative explanations related to learning about common values and vote buying

demand curves for stocks do not slope down evidence using an exogenous supply shock we analyze the price impact of an exogenous share sale of inside blockholders who were forced to sell a part of their shareholdings following a regulatory change in india the affected firms experience a negative excess return of 4 3 during the issue week crucially the price impact reverses within around 16 days of the event our results are consistent with the view that long term demand curves for stocks are flat this view is echoed in classical finance theories the short term price reaction to a sale is probably due to temporary price pressure

bayesian learning in social networks we study the perfect bayesian equilibrium of a sequential learning model over a general social network each individual receives a signal about the underlying state of the world observes the past actions of a stochastically generated neighbourhood of individuals and chooses one of two possible actions the stochastic process generating the neighbourhoods defines the network topology we characterize pure strategy equilibria for arbitrary stochastic and deterministic social networks and characterize the conditions under which there will be asymptotic learning convergence in probability to the right action as the social network becomes large we show that when private beliefs are unbounded meaning that the implied likelihood ratios are unbounded there will be asymptotic learning as long as there is some minimal amount of expansion in observations we also characterize conditions under which there will be asymptotic learning when private beliefs are bounded

bandwagons and momentum in sequential voting in this paper i show that an equilibrium exists to the sequential voting game in which a bandwagon begins with probability 1 these bandwagons are driven by a combination of beliefs and the desire of voters to vote for the winning candidate significantly in this equilibrium the pivot probability for each voter is non zero even in an infinite population consequently the bandwagons do not always start after one or at most two favourable decisions as do economic cascades and varying levels of informative voting are observed consistent with observations from sequential voting in u s presidential primaries further voters are exposed to counterintuitive incentives referred to as buyers remorse that have been attributed to real primary voters i also derive equilibrium behaviour in this environment when voting is simultaneous and compare the quality of information aggregation within each mechanism i relate the conclusions to u s presidential primaries and find they are consistent with a common conclusion about the front loading of the primary process that in tight elections with no front runner simultaneous voting is preferred whereas in lopsided elections sequential voting is preferred the superior performance of sequential voting in lopsided races is precisely because bandwagons occur copyright 2007 wiley blackwell

equilibria of the sealed bid mechanism for bargaining with incomplete information we study the nash equilibria of the sealed bid bargaining mechanism with incomplete information a nonzero sum game for the case of uniform priors we describe two uncountably numerous families of equilibria the first has differentiable strategies in the second the strategies are step functions the efficiencies of these equilibria range from second best to zero for independent nonuniform priors we show that a similar situation obtains these results seem discouraging with regard to using the sealed bid mechanism in practice the mechanism might be salvaged however if bargainers turn out to confine themselves to linear strategy equilibria

from inflation to more inflation disinflation and low inflation volume 2 of a history of the federal reserve forthcoming covers the years of inflation and disinflation followed by a return to relatively low inflation it addresses four questions why did inflation start why did it continue for 15 or more years from 1965 to about 1982 why did it end why did it not return as we look back to the 1950s and 1960s two of the many changes in the federal reserve system affecting inflation deserve comment first in the 1950s the goal was price stability and zero reported inflation not inflation of about 2 percent the 1959 1960 disinflation brought reported consumer price index cpi inflation measured as a 12 month moving average to less than 1 percent from march through august 1959 this measure again was below 1 percent through most of 1961 and it did not reach 2 percent until early 1966 properly measured and adjusted for biases in the price index the true price level probably declined modestly during this period this period of deflation was also a period of sustained economic growth it and several periods of deflation discussed in volume 1 of a history of the federal reserve 2003 show no evidence of the liquidity trap that absorbed much recent attention in the united states and japan a second major change is the role of economists and economic research at the federal reserve board and in the federal reserve banks in the 1950s the board had no economists as members and there were few economists as

does government ideology matter in monetary policy a panel data analysis for oecd countries this paper examines whether government ideology has influenced monetary policy in oecd countries we use quarterly data in the 1980 1 2005 4 period and exclude emu countries our taylor rule specification focuses on the interactions of a new time variant index of central bank independence with government ideology the results show that leftist governments have somewhat lower short term nominal interest rates than rightwing governments when central bank independence is low in contrast short term nominal interest rates are higher under leftist governments when central bank independence is high the effect is more pronounced when exchange rates are flexible our findings are compatible with the view that leftist governments in an attempt to deflect blame of their traditional constituencies have pushed market oriented policies by delegating monetary policy to conservative central bankers

information acquisition in financial markets tions agents have exponential utility and random variables are normally distributed these assumptions are often necessary to obtain closed form solutions we present an example with alternative assumptions and demonstrate that some of the conclusions from previous literature fail to hold in particular we show that in our example as more agents acquire information prices do not necessarily become more informative and agents may have greater incentive to acquire informatioln learning can therefore be a strategic complement allowing for the possibility of multiple equilibria

a decentralized market with common values uncertainty non steady states we analyse a market where i trade proceeds by random and anonymous pairwise meetings with bargaining ii agents are asymmetrically informed about the value of the traded good and iii no new entrants are allowed once the market is open we show that information revelation and efficiency never obtain in equilibrium even as discounting is removed this holds whether the asymmetry is two sided or one sided in some cases there exist equilibria where a substantial amount goes untraded this contrasts with the earlier literature which was based on the steadystate equilibria of a model where agents enter the market every period

when collective ignorance is bliss theory and experiment on voting for learning abstract when do groups and societies choose to be uninformed we study a committee that needs to vote on a reform which will give every member a private state dependent payoff the committee can vote to learn the state at no cost we show that the committee votes not to learn the state whenever independent voters are more divided than partisans this implies that groups with conflicting preferences tend to seek less information a laboratory experiment shows that committees are substantially more likely to vote against acquiring information when the theory predicts them to do so we also observe deviations from theory that are largely explained by cognitive limitations at the same time subjects with more experience or with greater strategic competence are more likely to vote in line with the theory providing evidence for external validity of the model

information revelation in a market with pairwise meetings the paper presents a simple pairwise meetings model of trade the new feature is that agents have asymmetric information about the true state of the world the focus is on the transmission of the information through the process of trade the qualitative question is to what extent is the information revealed to uninformed agents through the trading process when the market is in some sense frictionless in particular does the decentralized process give rise to full revelation results as derived by the literature on rational expectations for centralized and competitive environments in the context of the model of this paper it turns out that the information is not fully revealed to uninformed agents even when the market is in some sense approximately frictionless

sequential sales learning and cascades when ipo shares are sold sequentially later potential investors can learn from the purchasing decisions of earlier investors this can lead rapidly to cascades in which subsequent investors optimally ignore their private information and imitate earlier investors although rationing in this situation gives rise to a winner s curse it is irrelevant the model predicts that 1 offerings succeed or fail rapidly 2 demand can be so elastic that even risk neutral issuers underprice to completely avoid failure 3 issuers with good inside information can price their shares so high that they sometimes fail 4 an underwriter may want to reduce the communication among investors by spreading the selling effort over a more segmented market consider a scenario in which an issuer is selling a new security of uncertain value for example an ipo initial public offering of stock or high yield debt through an underwriter the s e c has banned variable price sales while the value of this new security is highly uncertain to individual market participants investors hold perfectly accurate information when aggregated moreover there are many potential investors and a small number of these investors can jointly determine the value of the firm or its project with high precision it would seem that in this scenario underpriced offerings would succeed and overpriced offerings would fail nevertheless this paper shows that if the distribution channels of invest ment banks are limited underpriced offerings can fail and overpriced offer ings can succeed with limited distribution channels it takes the under writer time to approach interested investors therefore later investors can observe how well an offering has sold to date or at least how successful it has sold relative to offerings previously undertaken by this underwriter

information percolation in large markets we introduce a simple model of the percolation of information of common interest through a large market as agents encounter each other over time and reveal information to each other some of which they may have received earlier from other agents we are particularly interested in the evolution over time of the cross sectional distribution in the population of the posterior probability assignments of the various agents we provide a market example based on privately held auctions and obtain a relatively explicit solution for the cross sectional distribution of posterior beliefs at each time our results contribute to the literature on information transmission in markets hayek 1945 argues that markets allow information that is dispersed in a population to be revealed through prices grossman s 1981 notion of a rational expectations equilibrium formalizes this idea in a setting with price taking agents milgrom 1981 pesendorfer and swinkels 1997 and reny and perry 2006 provide strategic foundations for the rational expectations equilibrium concept in centralized markets a number of important markets however are decentralized these include over the counter markets and private auction markets wolinsky 1990 and blouin and serrano 2002 study information transmission in decentralized markets in contrast to these two papers equilibrium behavior in our market example leads to full revelation of information we happily acknowledge conversations with manuel amador frank kelly jeremy stein and pierre olivier weill and research assistance from sergey lobanov rubinstein and wolinsky 1985 and gale 1986a 1986b study decentralized markets without asymmetric information satterthwaite and shneyerov 2003 study decentralized market with private value asymmetric information amador and weill 2006 study a more abstract setting regarding transmission of common and private i nformation

decentralized trading with private information the paper studies how asset prices are determined in a decentralized market with asymmetric information about asset values we consider an economy in which a large number of agents trade two assets in bilateral meetings a fraction of the agents has private information about the asset values we show that over time uninformed agents can elicit information from their trading partners by making small offers this form of experimentation allows the uninformed agents to acquire information as long as there are potential gains from trade in the economy as a consequence the economy converges to a pareto efficient allocation

bilateral trade with the sealed bid k double auction existence and efficiency for k in the unit interval the k double auction determines the terms of trade when a buyer and a seller negotiate transfer of an item the buyer submits a bid b and the seller submits an offer s trade occurs if b exceeds s at price kb 1 k s we model trade as a bayesian game in which each trader privately knows his reservation value but only has beliefs about the other trader s value existence of a multiplicity of equilibria is proven for a class of trader s beliefs for generic beliefs however these equilibria are shown to be ex ante inefficient

first in first win evidence on schedule effects in round robin tournaments in mega events the order of actions in contests may have a significant effect on performance in this study we examine the role of the schedule in round robin tournaments with sequential games between three and four contestants our empirical analysis based on soccer fifa world cups and uefa european championships and on two olympic wrestling events reveals that there is a substantial advantage to the contestant who competes in the first and third matches our findings are in line with the hypothesis that winning probabilities in multi stage contests with sequential games are endogenously depending on the schedule of contests as predicted by game theoretical models we also discuss possible ways to reduce the effect of the schedule

the cycle of violence an empirical analysis of fatalities in the palestinian israeli conflict thomas c schelling s the strategy of conflict 1960 laid the groundwork for thinking about conflicts as non zero sum games in which each side may choose to exercise or threaten violence in order to deter or incapacitate the opponent or simply to exact revenge it has been difficult however to test many of the predictions formulated by schelling and others because of the lack of data on the strategic choices of the two sides engaged in a conflict observed at a high enough frequency for statistical tests to have any power this paper uses daily frequency data to analyze the dynamics of violence during four years of the second intifada the most recent outburst of the palestinian israeli conflict