models of inflation expectations formation a comparison of household and economist forecasts the recent appreciation of the critical role played by expectations of inflation in the behavior of macromodels has stimulated empirical studies of the formation of expectations by different groups time series survey data on expectations of inflation exist now for economists households and businesses these data have been used as independent variables in explaining wage behavior gordon 16 turnovsky and wachter 34 and de menil and bhatta 5 prices turnovsky and wachter 34 and wachtel 36 interest rates gibson 14 hendershott and van horne 19 pearce 30 and mishkin 27 and consumption wachtel 36 generally with a significant improvement in explanatory power they have also been used as dependent variables in attempts to determine how expectations are formed by gordon 15 mullineaux 28 jacobs and jones 20 and figlewski and wachtel 9 for the economist survey van duyne 35 for the household survey and leonard 23 and de leeuw and mckelvey 4 for businesses given their different levels of knowlege of economics and perspectives one might expect that the models used by the different groups to forecast inflation would

reinterpreting the role of inflation in politico economic models the author attempting to analyze the interplay between politics and economics is faced with a large number of problems ranging from an always too small and idiosyncratic data set to the lack of any generally accepted theory of the process which has testable implications my aims have been 1 to show that past studies have typically treated inflation in an extremely naive way disregarding the fact that it may have political pluses if unanticipated and 2 to test the sensitivity of established formulations to what i believe is the more useful view of voter behavior given in model ii since model i and model ii represent polar extremes of amnesiac and eidetic behavior tests of intermediate lag structures are clearly in order because of administration peculiarities however lost data points will pose a serious problem

rational irrationality and the microfoundations of political failure models of inefficient political failure have been criticized forimplicitly assuming the irrationality of voters wittman 1989 1995 1999 coate and morris 1995 building on caplan s 1999a 1999b model of rational irrationality the current papermaintains that the assumption of voter irrationality is boththeoretically and empirically plausible it then examinesmicrofoundational criticisms of four classes of political failuremodels rent seeking pork barrel politics bureaucracy andeconomic reform in each of the four cases incorporating simpleforms of privately costless irrationality makes it possibleto clearly derive the models standard conclusions moreover itfollows that efforts to mitigate political failures will besocially suboptimal as most of the literature implicitlyassumes it is a mistake to discount the empirical evidence forthese models on theoretical grounds

how efficient is the voting market it is by now well established that good macroeconomic conditions benefit the incumbent president and his congressional party confreres at the polls this result is not unanimous see for example stigler or arcelus and meltzer2 and may not be universal 3 however the basic results in kramer 4 the progenitor of the modern literature on the effect of economic conditions on elections seem to have stood the test of time the broad consensus of this literature is that voters in presidential and congressional elections 1 reward income growth and punish unemployment and inflation 2 probably give greater weight to income growth than to unemployment and inflation and 3 myopically ignore any information beyond the recent past say prior to the election year 5 so far however the data have outrun interpretation while economic conditions seem to matter we do not know why they matter or how plausibly to characterize the process by which voters translate information about economic conditions into voting decisions this article tries to fill that gap though it extends the empirical literature to gubernatorial elections its main con

an equilibrium politico economic model an equilibrium politico economic model i introduction recent empirical studies by alesina and sachs 1986 and haynes and stone 1987 have found that political elections have significant implications for the time paths of employment and inflation explnations of this phenomenon fall into two general categories political business cycle theories and partisan theories in political business cycle models it is assumed that the government has both the ability and desire to manipulate the economy for electoral purposes partisan theories suggest that if competing parties follow different policies it is the surprise of an election result that causes a response from the economy however partisan theories can only explain why different parties experience different levels of employment and output early in an electoral term here a partisan model is developed in which economic and political shocks before an election have asymmetric effects on inflation employment and voting behavior depending on which party is in power and which economic variables effect voting ii political structure and voting two political parties compete periodically for control of the government the parties are distinguished by their expected monetary growth rates denoted mu sup h high and mu sup l low the electorate consists of a continuum of voters distributed uniformly on the interval p p individuals located closer to p are more favorably pre disposed to party h let x sub t be an index of the relative popularity of the parties at time t if x sub t 0 party h has a plurality of support if x sub t in nonelection years the expected monetary growth rate will be the incumbents trend rate while in election years it will be the probabilistically weighted average of the two parties expected monetary growth rates iii economic structure the economy is described by a rational expectations macro model unemployment is determined by the surprise phillips curve u sub t eta sub 0 eta sub 1 sub t 1 pi sup e sub t pi sub t epsilon sub t where sub t 1 pi sup e sub t denotes expected inflation and epsilon sub t a real shock distributed epsilon sub t is approx n 0 sigma sup 2 sub epsilon independent over time eta sub 0 is greater than 0 and eta sub 1 is greater than 0 are constants eta sub 0 is the natural rate the rate of inflation is given by pi sub t mu sup s sub t mu sup d sub t where mu sup s sub t and mu sup d sub t are respectively the growth rates of the nominal money supply and demand for real beginning of period cash balances

tests for parameter instability in regressions with i 1 processes this article derives the large sample distributions of lagrange multiplier lm tests for parameter instability against several alternatives of interest in the context of cointegrated regression models the fully modified estimator of phillips and hansen is extended to cover general models with stochastic and deterministic trends the test statistics considered include the supf test of quandt as well as the lm tests of nyblom and of nabeya and tanaka it is found that the asymptotic distributions depend on the nature of the regressor processes that is if the regressors are stochastic or deterministic trends the distributions are noticeably different from the distributions when the data are weakly dependent it is also found that the lack of cointegration is a special case of the alternative hypothesis considered an unstable intercept so the tests proposed here may also be viewed as a test of the null of cointegration against the alternative of no cointegration the tests are applied to three data se

cointegration and causal relationships between energy consumption and output assessing the evidence from australia in this paper we describe our investigation of the cointegration and causal relationships between energy consumption and economic output in australia over a period of five decades the framework used in this paper is the single sector aggregate production function which is the first comprehensive approach used in an australian study of this type to include energy capital and labour as separate inputs of production the empirical evidence points to a cointegration relationship between energy and output and implies that energy is an important variable in the cointegration space as are conventional inputs capital and labour we also find some evidence of bidirectional causality between gdp and energy use although the evidence of causality from energy use to gdp was relatively weak when using the thermal aggregate of energy use once energy consumption was adjusted for energy quality we found strong evidence of granger causality from energy use to gdp in australia over the investigated period the results are robust irrespective of the assumptions of linear trends in the cointegration models and are applicable for different econometric approaches

economic growth and energy consumption causal nexus viewed through a bootstrap rolling window one puzzling results in the literature on energy consumption economic growth causality is the variability of results particularly across sample periods sample sizes and model specification in order overcome these issues this paper analyzes the causal links between energy consumption and economic growth for g 7 countries using bootstrap granger non causality tests with fixed size rolling subsamples the data used includes annual total energy consumption and real gross domestic product gdp series from 1960 to 2006 for g 7 countries excluding germany for which the sample period starts from 1971 using the full sample bootstrap granger causality test we find that there is predictive power from energy consumption to economic growth only for canada however parameter instability tests show that none of the estimated models have constant parameters and hence the full sample results are not reliable analogous to the full sample results the results obtained from the bootstrap rolling window estimation indicate no consistent causal links between energy consumption and economic growth we however find that causal links are present between the series in various subsamples furthermore these subsample periods correspond to significant economic events indicating that the findings are not statistical artefacts but correspond to real economic changes our results encompass previous findings and offer an explanation to varying findings

the growth of income and energy consumption in six developing countries this paper reexamines the inter temporal link between energy consumption and income in six developing countries with diverse economic backgrounds and energy statistics in a production function framework we employ the generalized variance decompositions and generalized impulse response techniques to see if the growth of income and energy consumption contains considerable information to predict each other in all countries energy appears as an essential factor of production results indicate that energy may be a relatively more important input than labor and or capital in some countries hence neutrality of energy does not seem to hold

exploring the relationship between energy use and economic growth with bivariate models new evidence from g 7 countries abstract there is a rapidly growing literature on the interaction between energy use and economic development with many analysts drawing policy conclusions on the basis of granger causality tests that involve only an energy and an economic variable this paper attempts to demonstrate empirically that such studies although useful for certain applications may be of limited use for policy purposes after outlining theoretical and methodological issues associated with such approaches i apply bivariate energy economy causality tests for canada france germany italy japan the united kingdom and the united states using aggregate and sectoral data and three different modern econometric methods the results which are often contradictory or economically implausible illustrate explicitly that one should be cautious when drawing policy implications with the aid of bivariate causality tests on small samples i therefore underline the importance of utilizing as large sample sizes as possible and using multivariate models which are closer to economic theory accommodate several mechanisms and causality channels and provide a better representation of real world interactions between energy use and economic growth

energy consumption and economic growth evidence from the economic community of west african states ecowas access to modern energy is believed to be a prerequisite for sustainable development poverty alleviation and the achievement of the millennium development goals however theoretical models and empirical results offer conflicting evidence on the relationship between energy consumption and economic growth that we remain largely unsure of the cause and effect nature of this relationship if indeed a relationship exists at all this paper tests in a panel context the long run relationship between energy access and economic growth for fifteen african countries from 1980 to 2008 by using recently developed panel cointegration techniques we adopt a three stage approach consisting of panel unit root panel cointegration and granger causality tests to study the dynamic causal relationships between energy consumption energy prices and growth as well as relationship between electricity consumption prices and growth results show that gdp and energy consumption as well as gdp and electricity move together in the long run by estimating these long run relationships and testing for causality using panel based error correction models we found unidirectional long run and short run causality the causality is running from gdp to energy consumption in the short run and from energy consumption to gdp in the long run there is also evidence of unidirectional causality running from electricity consumption to gdp in the long run this study thus provides empirical evidence of long run and causal relationships between energy consumption and economic growth for our sample of fifteen countries suggesting that lack or limited access to modern energy services could hamper economic growth and compromise the development prospects of these countries

the relationship between energy and gnp further results this paper reexamines the casuality between gnp and energy consumption by using updated us data for the period 1947 1979 as a secondary contribution we investigate the causal relationship between energy consumption and employment applying sims technique we find no causal relationship between gnp and energy consumption we find further that there is a slight unidirectional flow running from employment to energy consumption economic interpretations of the empirical results are also presented

rational expectations in the aggregate this paper investigates the relationship between the way rational expectations is employed in practice and the argument initially put forth to justify its use in practice rational expectations has meant that the expectations of each agent taken separately is consistent with the predictions of the theory this is different than the argument frequently used by proponents of rational expectations that on an aggregate level expectations should be consistent with the theory the primary findings are that standard and aggregate rational expectations typically yield systematically different equilibria and that the size of the difference depends positively on the degree of synergism

is the political business cycle really dead a decade ago in this journal mccallum 26 proclaimed the theory of the political business cycle 30 25 17 to be dominated by the emergence of the rational expectations literature 23 24 34 clearly the two theories are inconsistent when a strong view of rational expectations sees governments unable to manipulate real variables to create booms in election years since then new developments in macroeconomics have occasioned serious doubts as to whether the strong version of rational expectations is supported by the data 28 2 1 31 12 furthermore new advances in the political business cycle literature 36 4 have attempted to reconciliate the two theories by emphasizing that expectation errors may result from the presence of party dependent policy reaction functions and uncertainty about election outcomes the purpose of this paper is to step back and reconsider whether or not the empirical evidence presented by mccallum favoring rational expectations for the u s was really that strong and could be generalized to other countries here the u k given that the rational expectations hypothesis has been rejected at least in the strong mccallum and sargent version 26 34 it

rational ignorance rational voter expectations and public policy a discrete informational foundation for fiscal illusion this paper demonstrates that rational ignorance properly defined allows the possibility that fiscal illusion affects policies in a democracy the implications of rational ignorance are examined in a setting where voters are assumed to completely understand the fiscal environment and make perfect use of any information that they possess in this setting it is demonstrated that ignorance may be rational manipulated and generate biased expectations over fiscal parameters

the use of knowledge about society abstract selection of efficient institutions or policies in politics requires constituents to estimate the net benefits of political reforms political competition fails to inform constituents of the costs of forgone political alternatives ignorance of political opportunity costs prevents the adoption of welfare enhancing reforms of public institutions and policies the empirical record supports this contention

unanticipated money and the political business cycle six different series of one period forecasts for money growth are generated for each year 1960 through 1984 the prediction errors are analyzed to see whet herthe authorities attempted to expand the economy in election years by unexpectedly raising money growth while there is no evidence of attempts to fool the public throughout the entire 1960 84 period such fooling may have been tried through 1974 it is speculated that the public discussion of expectations formation and of politicians motivations since then may have signaled officials that further attempts to mislead the public would be prohibitively costly copyright 1986 by ohio state university press

systematically biased beliefs about economics robust evidence of judgemental anomalies from the survey of americans and economists on the economy differences between the general public s positive economic views and economists resemble other judgemental anomalies laypeople and experts systematically disagree i analyse this puzzle using data from the survey of americans and economists on the economy the paper first tests and decisively rejects the hypothesis that the differences solely reflect economists self serving bias then it examines whether economists political ideology and party loyalties explain the disagreement if anything this slightly increases their magnitude the effect of economic training clearly falls but remains large after adding education to the set of control variables apparent biases robustness suggests that the anomaly is real

political parties and the business cycle in the united states 1948 1984 this paper tests the existence and the extent of a politically induced business cycle in the u s in the post world war ii period the cycle described in this paper is different from the traditional political business cycle of nordhaus it is based on a systematic difference between the monetary policies of the two parties in a model with labor contracts from an explicit optimization problem we derive a system of equations for output and money growth then we successfully test the non linear restriction imposed by the theory on the parameters of the system of equations we cannot reject the hypothesis that money growth has been systematically different under the two types of administration and that this difference contributes to explain output fluctuations

carbon emissions energy consumption and output a threshold analysis on the causal dynamics in emerging african economies abstract following the recent global economic downturn attention has gradually shifted towards emerging economies which have experienced robust growth amidst sluggish growth of the world economy a significant number of these emerging economies are in africa rising growth in these economies is associated with surging demand for energy to propel the engines of growth with direct implications on emissions into the atmosphere further these economies are constantly being shaped by series of structural reforms with direct and indirect effects on growth demand for energy etc to this end this paper examines the causal dynamics among energy use real gdp and co2 emissions in the presence of regime shifts in six emerging african economies using the gregory and hansen 1996a j econ 70 99 126 threshold cointegration and the toda and yamamoto 1995 j econometrics 66 225 250 granger causality techniques results confirm the presence of regime shift effects in the long run inter linkages among energy use real gdp and co2 emissions in the countries considered thus indicating that structural changes have both economic and environmental effects hence integration of energy and environmental policies into development plans is imperative towards attaining sustainable growth and development

origin of predictable behavior further modeling and applications economic theory is founded on the assumption that agents act as if they are able to maximize according to well behaved preferences regardless of how complex their decision problems might be consequently the theory has never investigated the consequences of a genuine gap between an agent s decision making competence and the difficulty of a decision problem called a c d gap in a recent paper 1983 hereafter called the origin paper i outlined a general theory for investigating the latter possibility a major theme was that recurrent pattern in behavior arises because of decision making uncertainty due to a c d gap so that uncertainty becomes the basic source of predictable behavior here i discuss certain theory topics that were only sketched in the origin paper and briefly suggest a few related applications to pursue these objectives i begin with a short restatement of the reliability condition introduced in the origin paper

environment kuznets curve for co2 emissions a cointegration analysis for china abstract this study examines the long run relationship between carbon emissions and energy consumption income and foreign trade in the case of china by employing time series data of 1975 2005 in particular the study aims at testing whether environmental kuznets curve ekc relationship between co 2 emissions and per capita real gdp holds in the long run or not auto regressive distributed lag ardl methodology is employed for empirical analysis a quadratic relationship between income and co 2 emission has been found for the sample period supporting ekc relationship the results of granger causality tests indicate one way causality runs through economic growth to co 2 emissions the results of this study also indicate that the carbon emissions are mainly determined by income and energy consumption in the long run trade has a positive but statistically insignificant impact on co 2 emissions

the origin of predictable dynamic behavior abstract nonlinear dynamic theory implies optimal decisions often behave like random chaos such random target motion is impossible for imperfect agents to follow without error however they can still gradually approach the optimal target if and only if they partially adjust toward its perceived location so as to induce their behavior to converge to an equilibrium reducing dynamic errors through partial adjustment thereby induces a stable regularity in behavior that otherwise may never evolve this result agrees with the stability properties observed in experimental markets including cobweb auction and asset markets whose dynamics before reaching equilibrium exhibit adaptive rather than rational expectations

limited rationality and strategic complements the implications for macroeconomics this paper considers the implications of heterogeneity in information processing abilities for macroeconomic models that exhibit strategic complements the latter is the same concept that has received much attention in the recent macro literature under the headings keynesian coordination problems and positive trading externalities we consider environments in which agents vary in terms of their ability to form expectations and ask whether it is the sophisticated agents or the naive agents who have a disproportionately large effect on macroeconomic equilibrium we find that if macroeconomic interaction exhibits strategic complementarity then it is the naive agents who have a disproportionate impact

informational limits to democratic public policy the jury theorem yardstick competition and ignorance condorcet s jury theorem provides a possible explanation for the success of democracies relative to other forms of government in its modern form the jury theorem predicts that majority decisions are well informed because they are based upon far more information than possessed by any single individual on the other hand it is evident that democratic politicians and policies are not always as good as the jury theorem implies they should be

legislator voting and shirking a critical review of the literature we set out to critically review the progress in answering two related questions what determines how legislators vote and how can shirking by legislators be measured in the first category the hypothesis that legislators shirk in order to indulge their personal ideological preferences has led researchers astray the theoretical underpinning is shaky on two counts first legislators who indulge their preferences at the expense of their constituents preferences put themselves at a competitive electoral disadvantage second the original two stage procedure used to measure ideological shirking is severely flawed among many other problems the residual measure of shirking implicitly assumes that the median voter is the relevant constituent principal for the legislator agent

sources of inefficiency in a representative democracy a dynamic analysis this paper studies the efficiency of policy choice in representative democracies it extends the citizen candidate model of democratic policy making to a dynamic environment equilibrium policy choices are shown to be efficient in the sense that in each period conditional on future policies being selected through the democratic process there exists no alternative current policy choices which can raise the expected utilities of all citizens however policies that would be declared efficient by standard economic criteria are not necessarily adopted in political equilibrium the paper argues that these divergencies are legitimately viewed as politicalfailures

energy consumption and economic growth the experience of african countries revisited abstract the aim of this paper is to re examine the causal relationship between energy consumption and economic growth for seventeen african countries in a multivariate framework by including labor and capital as additional variables we apply the variance decomposition analysis due to pesaran and shin pesaran m h and shin y generalised impulse response analysis in linear multivariate models economics letters 1998 58 17 29 to evaluate how important is the causal impact of energy consumption on economic growth relative to labor and capital the results of our multivariate modified granger causality analysis due to toda and yamamoto toda h y and yamamoto t statistical inference in vector autoregressions with possibly integrated process journal of econometrics 1995 66 225 250 tend to reject the neutrality hypothesis for the energy income relationship in fifteen out of the seventeen countries in contrast results of our variance decomposition analyses show that in eleven out of the seventeen countries energy is no more than a contributing factor to output growth and not an important one when compared to capital and labor labor and capital are the most important factors in output growth in fifteen out of the seventeen countries however these results should be interpreted with care as they may not be sufficiently robust enough to support the inference that energy consumption plays a minor role in the economic growth of african countries

energy consumption carbon emissions and economic growth in china abstract this paper investigates the existence and direction of granger causality between economic growth energy consumption and carbon emissions in china applying a multivariate model of economic growth energy use carbon emissions capital and urban population empirical results for china over the period 1960 2007 suggest a unidirectional granger causality running from gdp to energy consumption and a unidirectional granger causality running from energy consumption to carbon emissions in the long run evidence shows that neither carbon emissions nor energy consumption leads economic growth therefore the government of china can purse conservative energy policy and carbon emissions reduction policy in the long run without impeding economic growth

presidential elections and federal reserve policy an empirical test traditional macro economic models of federal reserve fed behavior typically assume that the fed enjoys a well defined objective function based on social welfare and generally predict counter cyclical monetary policy the increasing observation of procyclical monetary policy has led many researchers to investigate new models of fed behavior several recent papers imply that procyclical fed behavior is due to a lack of political accountability friedman 7 toma 23 and shughart and tollison 21 all attribute considerable bureaucratic discretion to the fed and seek to explain monetary policy by examining typical bureaucratic objectives other papers such as pierce 19 20 weintraub 26 and kane 10 11 argue that the fed operates in an arena filled with political constraints that cause sub optimal monetary policy but these constraints are not modeled explicitly one possible political constraint on fed behavior is the incumbent president s desire for re election in the political business cycle pbc literature presidential re election opportunities are enhanced by the production of a precise set of inflation and unemployment outcomes leading up to the election thus to the extent that presidents desire cyclical macro economic outcomes there will be executive pressure on the fed to create or accommodate such outcomes the effect this pressure will have on fed policy is ultimately an empirical question but most models deal with it by assumption traditional macro modeling assumes a zero effect while the pbc models implicitly assume that a favorable election cycle is a primary goal of all economic policymakers this paper examines presidential influence on the federal reserve by testing for an election cycle in money growth the major result is the identification of a regular 16 quarter cycle in money growth corresponding with presidential elections this cyclical effect is found to be stable over time and significant under a wide range of model specifications further when the cyclical component of money growth is used to simulate a simple macro model it produces a classic political business cycle in inflation and real output growth

the bias toward zero in identifying relationships reply to kennedy we will argue that rational expectations has considered only the misestimation type of error which can cancel out in the aggregate but that with errors in identifying relationships there is no similar cancelling out effect fremling and lott 1996 276 kennedy 1999 misses much of our point when he extends our two variable case to a three variable case he views agents as exclusively making the traditional specification errors as is well known specification errors concern what variables to include when estimating a regression he fails to address our main contribution that people sometimes do not identify that a relationship even exists when describing our argument kennedy goes so far as to always replace our references to model identification error with the term specification error for instance the way he refers to our footnote 5 p 279 gives the misleading impression that we ourselves are using the term specification errors our footnote clearly uses the term identification errors 1 and it is only because he switches these terms that he is able to conclude that fremling and lott have violated one of their own assumptions in our 1996 paper we showed the following individual actors sometimes are quite clueless as to an economic problem failing to understand that two or more variables are related we extensively described this identification problem on p 278 and we stated the crucial argument in this paper is that at least some people fail to identify a true relationship and therefore never take the next step which is to estimate the strength of it failing to estimate the strength of a relationship is essentially equivalent to estimating it to be zero thus many do not reach the regression step at all when aggregating across individuals making various mistakes economic behavior at the group level resembles a situation where every individual estimates a regression but underestimates the regression coefficient even though all our actors are rational and thus only make non systematic mistakes in what variable s are omitted the aggregate results could equally well have been generated by a group of non rational actors systematically underestimating the regression coefficients in other words when observing aggregate behavior that contains aggregate systematic errors one must be cautious not to erroneously infer irrationality on the part of the individuals now to kennedy s numerical example with two independent variables rather than one how should our analysis be applied we maintain that there exists a total of eight possible cases one of correctly recognizing all three variables as being connected three of missing only one three of missing two one of missing all kennedy only recognizes four of the cases this makes an enormous difference if kennedy had also included the implicit zero coefficients in the remaining four cases he would have found a substantial bias toward zero for the representative individual alpha would have been only 4 05 not 8 09 compared to its true value of 6 kennedy never mentions his estimate of beta but as a careful reader can deduce this estimate is only 2 16 a serious underestimate and including the four other cases with zero s would have yielded a mere average estimate of 1 08 way below its true value of beta 4 in our view kennedy s monte carlo experiment merely confirms our results 2 kennedy makes it appear that his numerical example corresponds to our macroeconomic modeling in section v it does not for he overlooks our explicit assumption that the general price level cannot be perfectly and immediately observed by the workers p 283 this a very classical assumption in macroeconomics and forms the basis for why changes in the nominal wage are sometimes confused with changes in the real wage

specification error prediction bias and rational expectations i introduction in a recent issue of this journal fremling and lott 1996 present a novel explanation of why aggregate forecasts can be biased casting considerable doubt on the applicability of rational expectations their argument is based on some individuals making specification errors which in a misuse of econometric terminology they call identification errors when formulating economic models omitting relevant explanatory variables from estimation of economic relationships this causes these individuals to produce biased coefficient estimates so that when individual coefficient estimates are averaged to obtain the corresponding coefficients in the aggregate or representative individual forecasting relationship the aggregate representative coefficients are biased this in turn creates prediction bias offering an explanation for why empirical evidence tends not to support rational expectations unfortunately fremling and lott s presentation of their argument is misleading in particular they lead readers to believe that the phenomenon they identify results in aggregate representative coefficient estimates biased toward zero and they lead readers to believe that this causes underprediction the purpose of this note is to show that although these results are possible fremling and lott s argument does not guarantee this it is also possible for aggregate coefficient estimates to be biased away from zero and or that overprediction could result ii bias toward zero throughout their paper fremling and lott suggest that their argument shows that coefficient estimates of an aggregate relationship between variables or of a representative individual are biased toward zero bias towards zero appears in the title of their paper the first sentence of their abstract talks of downward biases in the aggregate that are equivalent to the public underestimating the strengths of the true relationships in summarizing their analytical result they state p 279 there should be a bias toward zero for the representative estimate on p 280 they claim that the importance of our argument lies in that the bias created by identification errors is always negative and in contrasting their theory to rational expectations they conclude on p 283 that our theory predicts that if mistakes occur they will involve as the evidence indicates systematic underestimates of the relationship fremling and lott s explanation of this phenomenon rests on the reasonable assumption that some people make specification errors when estimating relationships omitting relevant explanatory variables suppose for example p depends on m and f as in the macroeconomic modeling example in section v of fremling and lott s paper so that we predict delta p by delta p sup alpha sup delta m beta sup delta f where alpha sup and beta sup are ordinary least squares estimates of the corresponding parameters alpha and beta adopting the usual statistical assumptions as noted by fremling and lott in their footnote 4 p 278 if everyone estimates this relationship by regressing delta p on delta m and delta f the aggregate or representative relationship will have unbiased coefficient estimates fremling and lott claim that if some people estimate this relationship omitting am in effect estimating alpha by zero they will cause the aggregate representative relationship to have a coefficient estimate biased toward zero this is their result shown in equation 3 on p 279 unfortunately in reaching this result fremling and lott have violated one of their own assumptions namely that as noted in their footnote 5 p 279 the specification errors are random they have forgotten to account for those individuals who estimate this relationship by omitting delta f these individuals could create upward biased estimates of a that could cause the aggregate representative estimate of alpha to be biased away from zero

the bias towards zero in aggregate perceptions an explanation based on rationally calculating individuals i introduction a central theme in the study of economic behavior is individual rationality or utility maximizing behavior contrary to the accusations of many outside critics the economics assumption of rationality neither denies that information is costly nor implies that decisions are error free rational expectations allows for ignorance but insists on the absence of systematic errors in the aggregate even if some individuals make large underestimates their errors are offset by large overestimates made by others alternatively even if people on average underestimate the effect of some variable during one period they may overestimate its effect at a later date these assumptions form the basis for the standard conclusion that the government cannot systematically outsmart the public the theory and application of rational expectations has generated a vast literature over the last couple of decades it is now well known that the application of rational expectations theory to actual cases may for instance be unsuitable when there are systematic errors in the observed variables when loss functions are not quadratic or when variables are constrained to take only positive values while such limitations may well be problematic these objections have in our view not been very damaging in the sense that rational expectations still provides a natural starting point for much economic analysis like rational expectations this paper takes individual rationality as its central theme yet we reach a radically different conclusion from rational expectations regarding aggregate behavior we demonstrate that individual errors in identifying the relationships among variables cause a downward bias in the aggregate that would be equivalent to the public underestimating the strengths of the true relationships rational expectations has considered the misestimation type of error which can cancel out in the aggregate but with errors in identifying relationships there exists no similar cancelling out effect and thus the public appears to irrationally underestimate the strengths of relationships the paper is organized as follows first we set up a simple formal model to examine the misestimation problem and then contrast it to the identification problem section iii explains why the identification problem can be so important even when a relatively small number of variables are involved section iv reviews empirical evidence of bias in the expectations formation literature as shown in section v our hypothesis can be used to explain political business cycles in a standard aggregate supply and demand framework ii theory in our model individuals acquire knowledge in two steps they first identify the causal relationship between two or more variables and then estimate the strength of that relationship as with herbert a simon s satisficing approach 1959 1979 and the analysis in ronald a heiner 1988 we assume finite intellectual capabilities however our model neither assumes nor implies anything about simon s satisficing approach and the often related concept of bounded rationality instead our inquiry is strictly limited to the consequences of omitting variables and will not address the more ambitious question of what strategies individuals might adopt to improve learning like heiner we distinguish between the reliability of making decisions and the issue of obtaining information heiner shows that while decision making itself might be flawless when individuals face only a very limited amount of information it is optimal for them to choose a larger information set and enter into the imperfect decision zone he provides several different reasons finite channel capacity information complexity and nonlocal information for why the advantage of having much information also translates into more decision error while heiner s model deals with individuals making correct or incorrect decisions his underlying reasoning could equally well be used to motivate our analysis of why a portion of the population fails to appreciate certain economic relationships

energy consumption and economic growth in central america evidence from a panel cointegration and error correction model abstract this study examines the relationship between energy consumption and economic growth for six central american countries over the period 1980 2004 within a multivariate framework given the relatively short span of the time series data a panel cointegration and error correction model is employed to infer the causal relationship based on the heterogeneous panel cointegration test by pedroni pedroni p 1999 critical values for cointegration tests in heterogeneous panels with multiple regressors oxford bulletin of economics and statistics 61 653 670 pedroni p 2004 panel cointegration asymptotic and finite sample properties of pooled time series tests with an application to the ppp hypothesis new results econometric theory 20 597 627 cointegration is present between real gdp energy consumption the labor force and real gross fixed capital formation with the respective coefficients positive and statistically significant the granger causality results indicate the presence of both short run and long run causality from energy consumption to economic growth which supports the growth hypothesis