economic deregulation days of reckoning for microeconomists economic deregulation of american industry is one of the most important experiments in economic policy of our time 1 in 1977 17 percent of u s gnp was produced by fully regulated industries 2 by 1988 following ten years of partial and complete economic deregulation of large parts of the transportation communications energy and financial industries that total had been cut significantly to 6 6 percent of gnp 3 the political forces behind the decision to change the market conditions under which roughly 600 billion of u s output is produced were strong and varied but according to political scientists martha derthick and paul quirk 1985 p 36 deregulation would never have occurred if economists especially microeconomists had not generally supported it through their research 4 in retrospect it is fair to ask were microeconomists able to develop a theoretical and empirical framework to explain regulation and its effects and to form predictions of deregulation s effects were they able to predict the actual effects of deregulation this paper surveys the evidence to address these questions and of

to float or to fix evidence on the impact of exchange rate regimes on growth we study the relationship between exchange rate regimes and economic growth for a sample of 183 countries over the post bretton woods period using a new de facto classification of regimes based on the actual behavior of the relevant macroeconomic variables in contrast with previous studies we find that for developing countries less flexible exchange rate regimes are associated with slower growth as well as with greater output volatility for industrial countries regimes do not appear to have any significant impact on growth the results are robust to endogeneity corrections and a number of alternative specifications borrowed from the growth literature

quantile serial dependence in crude oil markets evidence from improved quantilogram analysis with quantile wild bootstrapping we examine the quantile serial dependence in crude oil prices based on the linton and whang s quantile based portmanteau test which we improved by means of quantile wild bootstrapping qwb through monte carlo simulation we find that the quantile wild bootstrap based portmanteau test performs better than the bound testing procedure suggested by linton and whang we apply the improved test to examine the efficiency of two crude oil markets wti and brent we also examine if the dependence is stable via rolling sample tests our results show that both wti and brent are serially dependent in all except the median quantiles these findings suggest that it may be misleading to examine the efficiency of crude oil markets in terms of mean or median returns only these crude oil markets are relatively more serially dependent in non median ranges

was the emergence of the international gold standard expected evidence from indian government securities abstract the emergence of the gold standard has for a long time been viewed as inevitable we analyze agents expectations using the spread between gold and silver bonds issued by the indian government we find that bimetallism was credible until france surprised markets by suspending domestic operation of bimetallism triggering a run away from silver thereafter markets began demanding a premium to hold silver bonds indicating their belief that silver would depreciate in the future as more countries moved on gold

chaos in oil prices evidence from futures markets abstract we test for the presence of low dimensional chaotic structure in crude oil heating oil and unleaded gasoline futures prices from the early 1980s evidence on chaos will have important implications for regulators and short term trading strategies while we find strong evidence of non linear dependencies the evidence is not consistent with chaos our test results indicate that arch type processes with controls for seasonal variation in prices generally explain the non linearities in the data we also demonstrate that employing seasonally adjusted price series contributes to obtaining robust results via the existing tests for chaotic structure maximum likelihood methodologies that are robust to the non linear dynamics lend support for samuelson s hypothesis on contract maturity effects in futures price changes however the tests for chaos are not found to be sensitive to the maturity effects in the futures contracts the results are robust to controls for the oil shocks of 1986 and 1991

neoclassical and marxian conceptions of production incorporating information deficiencies into the neoclassical paradigm has introduced some broad similarities with the marxian analysis of the labor process both approaches predict the existence of a variety of contractual regimes and that workers with equal productivities can be adjudged unequal in the market place and while the marxian approach sees unemployment as inevitable the new neoclassical models also allow for equilibrium unemployment these similarities and areas of divergence in the assessment of productive efficiency and welfare are explored a crucial difference arises from the individualism of the neoclassical model as opposed to the class approach in the marxian model copyright 1988 by oxford university press

asymmetric price adjustments a supply side approach using a model of dynamic price competition we provide an explanation from the supply side for the well established observation that output prices react faster in response to input cost increases than to decreases when costs decline the opportunity of profitable storing in anticipation of higher future costs allows competitive firms to coordinate on prices above current marginal costs the initial price response is only partial and profitable storing relaxes competition conversely when costs rise storing is not beneficial in anticipation of lower future costs and firms immediately adjust their prices to current marginal costs which entails the standard bertrand outcome our results shed new light on the empirical evidence about asymmetric pricing and can stimulate further empirical investigation on this puzzle

is wti crude oil market becoming weakly efficient over time new evidence from multiscale analysis based on detrended fluctuation analysis abstract this paper extends the work in tabak and cajueiro are the crude oil markets becoming weakly efficient over time energy economics 29 2007 28 36 and alvarez ramirez et al short term predictability of crude oil markets a detrended fluctuation analysis approach energy economics 30 2008 2645 2656 in this paper we test for the efficiency of wti crude oil market through observing the dynamic of local hurst exponents employing the method of rolling window based on multiscale detrended fluctuation analysis empirical results show that short term medium term and long term behaviors were generally turning into efficient behavior over time however in this way the results also show that the market did not evolve along stable conditions for long times multiscale analysis is also implemented based on multifractal detrended fluctuation analysis we found that the small fluctuations of wti crude oil market were persistent however the large fluctuations had high instability both in the short and long terms our discussion is also extended by incorporating arguments from the crude oil market structure for explaining the different correlation dynamics

the relationship between spot and futures oil prices do structural breaks matter abstract this paper examines the effect of structural breaks on the spot futures oil prices relationship we explore the impact of structural breaks on four critical issues including cointegrating relationships market efficiency under the expectation hypothesis and the no arbitrage rule causalities and forecasting performance of futures oil volatility as far as our empirical results exhibit the structural break we detect endogenously causes some influences on these issues which is in sharp contrast to the conclusions of existing studies our findings offer some implications and suggestions to researchers investors and policymakers

on the launching of a new currency this paper studies the appropriate way of launching a new fiat currency within a dual currency search theoretic framework we demonstrate that legal tender laws may not be sufficient to guarantee the acceptability of the new currency and that the old currency may continue to circulate if the enforcement power of legal tender laws is weak and the fraction of individuals endowed with the new currency is too low the possibility of converting the old currency into the new one can ease the transition to the new currency only if it is combined with strict legal tender laws finally a network externality may generate inefficiencies in the decision to switch to the new currency

oil price shocks economic policy uncertainty and industry stock returns in china asymmetric effects with quantile regression abstract this paper investigates the impact of crude oil shocks and china s economic policy uncertainty on stock returns at different locations on the return distributions based on monthly data from 1995 1 to 2016 3 we address this issue by employing the quantile regression technique this approach enables a more detailed investigation in different market circumstances namely bearish normal and bullish markets empirical results indicate that the effects of oil price shocks and economic policy uncertainty are asymmetric and highly related to stock market conditions moreover both the nexus of oil and economic policy uncertainty stock are changed at the onset of a crisis specially rising oil prices have greater negative effects on stock returns when stock markets are bullish extreme higher quantiles before a crisis whereas the effects are significantly positive under different market conditions after the onset of the crisis falling oil prices lower stock returns when stock markets are bullish and normal before the crisis whereas lower stock returns under different market conditions except extreme bullish after the onset of the crisis these findings might be related to the optimistic or pessimistic investor sentiments and investors might become more frightened after the crisis

is the us dollar a suitable anchor for the newly proposed gcc currency responses of inflation and non oil output growth from the gulf cooperation council gcc countries to monetary policy shocks from the united states us were estimated to determine whether there is evidence to support the us dollar as the anchor for the proposed unified currency a structural vector autoregression identified with short run restrictions was employed for each country with fed funds rate as the us monetary policy instrument non oil output growth and inflation the main results suggest that for inflation the gcc countries show synchronised responses to monetary policy shocks from the us which are similar to inflation in the us and for non oil output growth there is no clear indication that us monetary policy can be as effective for the gcc countries as it is domestically consequently importing us monetary policy via a dollar peg may guarantee only stable inflation for the gcc countries not necessarily stable non oil output growth if the non oil output response is made conscientiously and there are concerns over the dollar s ability to perform its role as a store of value a basket peg with both the us dollar and the euro may be a sound alternative as confirmed by the variance decomposition analysis of our augmented svar with a proxy for the european short term interest rate

testing for common features in north american energy markets abstract using recent advances in the field of applied econometrics we explore the strength of shared trends and shared cycles between north american natural gas and crude oil markets in doing so we use daily data from january 1991 to april 2001 on spot u s henry hub natural gas and wti crude oil prices the results show that there has been decoupling of the prices of these two sources of energy as a result of oil and gas deregulation in the united states we also investigate the interconnectedness of north american natural gas markets and find that north american natural gas prices are largely defined by the u s henry hub price trends

installed base and compatibility innovation product preannouncements and predation a good is often more valuable to any user the more others use compatible goods the authors show that this effect may inhibit innovation if an installed base exists and transition to a new standard must be gradual early adopters bear a disproportionate share of transient incompatibility costs this can produce excess inertia the installed base however is stranded if the new standard is adopted this may create excess momentum these dynamic effects have strategic implications temporary price cutting can permanently prevent entry and product preannouncements can be critical in innovation these strategic actions have ambiguous welfare effects

the relationship of wages to the value of labour power in marx s labour market having explicitly rejected malthus law of population marx asserted in his early writings that it was competition that would keep wages fluctuating the value of labor power even though he did not consider the production of labor power to be a capitalist process this paper notes the inconsistency in this approach and then proposes that implicit in marx s mature works there is a consistent mechanism through which wages gravitate toward the value of labor power this uses both the flexible historical and moral element of the value of labor power and the reserve army hypothesis this combination explains why wages follow a relatively even path over time a model of the labor market is developed which appears to be consistent with marx s mature writing copyright 1991 by oxford university press

time varying predictability in crude oil markets the case of gcc countries abstract this paper uses a time varying parameter model with generalized autoregressive conditional heteroscedasticity effects to examine the dynamic behavior of crude oil prices for the period february 7 1997 january 8 2010 using data from four countries of the gulf cooperation council we find evidence of short term predictability in oil price changes over time except for several short sub periods however the hypothesis of convergence towards weak form informational efficiency is rejected for all markets in addition we explore the possibility of structural breaks in the time paths of the estimated predictability indices and detect only one breakpoint for the oil markets in qatar and the united arab emirates our empirical results therefore call for new empirical research to further gauge the predictability characteristics and the determinants of oil price changes

the organization of work a historical dimension abstract an evaluation of the organizational efficiencies of various modes of production by o e williamson has led him to conclude that given identical technologies the factory was more efficient than the putting out system the superior organizational efficiency of the former he maintains was one reason for the transition to factory production during the nineteenth century this paper challenges that view it is argued that the way in which williamson evaluates efficiency is open to methodological and other objections and that there is limited empirical support for his hypothesis given an identical technology the evidence suggests that the putting out system was usually able to compete with the factory

the choice of exchange rate regimes in developing countries a multinomial panel analysis abstract this paper analyses the choices of exchange rate regimes in developing countries since 1980 static and dynamic random effects multinomial panel models are estimated using simulation based techniques explanatory variables include oca fundamentals stabilization considerations currency crises factors and political and institutional features the results reveal strong state dependence in regime choices we also find evidence for non monotonic relationship between regime determinants and the degree of regime flexibility

impact of the financial crisis on indian commodity markets structural breaks and volatility dynamics the shocks transmitted across the financial markets during the financial crisis resulted in structural changes in commodity volatility hence understanding volatility dynamics in changing scenario is vital for derivative pricing risk management and monetary policy stabilization this paper studies the impact of the financial crisis by analyzing the following aspects 1 presence of structural break regime shift in volatility by deploying markov and wavelet model during financial crisis and 2 crisis impact on volatility dynamic behavior such as persistence leverage and long memory by deploying hybrid wavelet egarch and fractional integration spot prices of 18 commodities were examined including all sub sectors of energy metals and agriculture indian commodity indices sub indices global benchmark indices and also stock indices such as sp agricultural commodities showed faster convergence to long run equilibrium while metal and energy experienced higher persistence and attracted more financial speculation the impact of the crisis on agricultural commodities was limited to internationally traded commodities such as sugar and rubber the common breaks and different volatility dynamics have been attributed to systematic risk and to idiosyncratic components respectively it was also found that during and after the crisis more than idiosyncratic risk it was systematic risk that contributed significantly to the volatility patterns of indian commodity markets

currency competition a hayekian perspective on international monetary integration currency internationalization is examined from the vantage point of friedrich hayek s contributions in the 1970s compared with received commentaries in which only an idealized case for private money is attributed to hayek this paper underscores other dimensions of hayek s work on money and currency hayek s case for choice in currency draws on his theory of competition anticipates competition between government suppliers of fiat money accommodates many aspects of international monetary integration and embodies a distinctive approach to monetary independence choice of exchange rate regime and the transnationalization of currency hayekian predictions are outlined for future developments in currency competition

forecasting volatility of crude oil markets abstract this article investigates the efficacy of a volatility model for three crude oil markets brent dubai and west texas intermediate wti with regard to its ability to forecast and identify volatility stylized facts in particular volatility persistence or long memory in this context we assess persistence in the volatility of the three crude oil prices using conditional volatility models the cgarch and figarch models are better equipped to capture persistence than are the garch and igarch models the cgarch and figarch models also provide superior performance in out of sample volatility forecasts we conclude that the cgarch and figarch models are useful for modeling and forecasting persistence in the volatility of crude oil prices

banking crises and exchange rate regimes is there a link the authors investigate the links between banking crises and exchange rate regimes using a comprehensive data set that includes developed and developing countries over the last two decades in particular they examine whether the choice of exchange rate regime affects the likelihood cost and duration of banking crises empirical results indicate that adopting a fixed exchange rate diminishes the likelihood of a banking crisis in developing countries but once a banking crisis occurs its real costs in terms of forgone output growth are higher for countries with more stringent exchange rate requirements the duration of crises seems not to be affected by exchange rate policy instead it is influenced mainly by the size of the credit boom before the crisis

toward efficiency in the crude oil market the official opec prices of crude oil before the collapse in the oil market in the mid 1980s can be interpreted as contract prices and analysed on the basis of the theory of futures or forward markets this paper uses the generalized method of moments estimation technique to test for efficiency in the relationship between the official prices and the ex post spot prices at the time of delivery efficiency is rejected for the sample period 1978 1985 as a whole but evidence is found of improvements over time further the gmm wald and hansen tests although asymptotically equivalent are shown to differ greatly when applied to a small sample of monthly oil price data

the choice of an exchange rate system and macroeconomic stability the recent theoretical literature regarding the choice of an exchange rate system has focused on how the choice of an exchange rate regime will affect the stability of the economy while the methodology and emphasis of the various theoretical arguments differ the common thread that runs through all is the notion that the appropriate exchange rate system will differ with the nature of the disturbance to the economy the substantive differences existing among the various studies are to a certain extent due to different criteria used for exchange system choice it is not surprising that one s beliefs with regard to the effect of exogenous shocks on exchange system choice will be sensitive to the objective function used for instance fischer 1977 and frenkel and aizenman 1982 focus on the minimization of real consumption shocks and derive the result that the greater the domestic money shocks the more likely is a float alternatively flood 1979 and aizenman 1983 with an objective of minimizing domestic price shocks conclude that the greater the domestic money shocks the more preferred is a fixed exchange rate while the evidence presented below will indicate which approach is more consistent with actual country practice we should first consider the rationale behind the criteria considered fischer appeals to basic micro theory when he says that concavity of utility functions expressed as a function of consumption justifies concern with the stability of consumption but it is not obvious that price stability is of itself undesirable

an identification robust test for time varying parameters in the dynamics of energy prices summary we test for the presence of time varying parameters tvp in the long run dynamics of energy prices for oil natural gas and coal within a standard class of mean reverting models we also propose residual based diagnostic tests and examine out of sample forecasts in sample lr tests support the tvp model for coal and gas but not for oil though companion diagnostics suggest that the model is too restrictive to conclusively fit the data out of sample analysis suggests a random walk specification for oil price and tvp models for both real time forecasting in the case of gas and long run forecasting in the case of coal copyright 2010 john wiley sons ltd

exploring different views of exchange rate regime choice the empirical distinction between de facto and de jure exchange rate regimes raises a number of interesting questions which factors may induce a de facto peg why do countries enforce a peg but do not announce it why do countries break their promises we show that a stable socio political environment and an efficient political decision making process are a necessary prerequisite for choosing a peg and sticking to it challenging the view that sees the exchange rate as a commitment device policymakers seem rather concerned with regime sustainability in the face of adverse economic and socio political fundamentals

voting on standardisation this paper analyses equilibria of voting on commodity standards within the framework of a farrell saloner model which takes into consideration the trade off between network effects and losses from a reduction of variety social welfare implications are derived and discussed with respect to manipulations of majority rules the findings indicate that welfare implications of standards are highly sensitive to the decision procedure and that the choice of the decision rule is non trivial as it can at least prevent worst outcomes if not guarantee optimal results

forecasting the conditional volatility of oil spot and futures prices with structural breaks and long memory models this paper extends previous studies by investigating the relevance of structural breaks and long memory in modeling and forecasting the conditional volatility of oil spot and futures prices using a variety of garch type models our results can be summarized as follows first we provide evidence of parameter instability in five out of nine garch based conditional volatility processes for energy prices second long memory is effectively present in all the series considered and a figarch model seems to better fit the data but the degree of volatility persistence diminishes significantly after adjusting for structural breaks finally the out of sample analysis shows that volatility models accommodating instability and long memory characteristics of the data provide the best volatility forecasts for most cases

gender awareness in modeling structural adjustment abstract the macroeconomic models underpinning the design of structural adjustment programs are gender blind this paper discusses strategies for introducing gender analysis into these models and evaluates the strengths and weaknesses of the models from a gender perspective it concludes that besides being blind to gender the models are also blind to the waste of resources and impoverishment that stems from deficient aggregate demand undemocratic decision making and directly unproductive expenditures that buttress male power this waste is however likely to be diminished by moves to more egalitarian systems of gender relations entailing changes in the structure of entitlements and the social matrix in which macroeconomic processes are embedded

efficiency of crude oil markets evidences from informational entropy analysis abstract the role of crude oil as the main energy source for the global economic activity has motivated the discussion about the dynamics and causes of crude oil price changes an accurate understanding of the issue should provide important guidelines for the design of optimal policies and government budget planning using daily data for wti over the period january 1986 march 2011 we analyze the evolution of the informational complexity and efficiency for the crude oil market through multiscale entropy analysis the results indicated that the crude oil market is informationally efficient over the scrutinized period except for two periods that correspond to the early 1990s and late 2000s us recessions overall the results showed that deregulation has improved the operation of the market in the sense of making returns less predictable on the other hand there is some evidence that the probability of having a severe us economic recession increases as the informational efficiency decreases which indicates that returns from crude oil markets are less uncertain during economic downturns

the efficiency of the crude oil markets evidence from variance ratio tests this study examines the random walk hypothesis for the crude oil markets using daily data over the period 1982 2008 the weak form efficient market hypothesis for two crude oil markets uk brent and us west texas intermediate is tested with non parametric variance ratio tests developed by wright j h 2000 alternative variance ratio tests using ranks and signs journal of business and economic statistics 18 1 9 and belaire franch j and contreras d 2004 ranks and signs based multiple variance ratio tests working paper department of economic analysis university of valencia as well as the wild bootstrap variance ratio tests suggested by kim j h 2006 wild bootstrapping variance ratio tests economics letters 92 38 43 we find that the brent crude oil market is weak form efficiency while the wti crude oil market seems to be inefficiency on the 1994 2008 sub period suggesting that the deregulation have not improved the efficiency on the wti crude oil market in the sense of making returns less predictable

labor market segmentation to what paradigm does it belong the dictionary defines a paradigm as a model or pattern in grammar an example of a conjugation or declension showing a word in all its inflectional forms a paradigm is thus a practical example which perfectly illustrates an abstract principle its hallmark in this dictionary definition is the complete correspondence between the abstract and the applied between theory and praxis the term was adapted to the discussion of scientific theory by thomas kuhn and its current vogue in economics is attributable directly to his book as kuhn used the term paradigm retains its double meaning of theory and of praxis but the relationship between the two becomes ambiguous scientists believe kuhn seems to argue that their inquiry is based upon a theory of how the world operates and how the investigation of its operation ought to proceed but normal science is in fact largely a set of practices in which members of a given scientific community customarily engage students seeking to follow their professors in careers in which the latter will judge them and ultimately determine their fate are not encouraged to andertake projects which depart radically from those which their professors conceive for them when suggestions for such projects trise either from students or competing nembers of the community they are as often reated by sarcasm and ridicule as the subect of seasoned discourse and debate in this rocess what students acquire is less an abtract understanding of what they are doing han a set of habits or instincts about what constitutes a legitimate mode of inquiry or a plausible explanation the disjuncture between theory and practice which arises in this way creates the potential for a scientific revolution to ask in this context about the paradigm to which notions of labor market segmentation belong is thus to ask a question about the relationship between that mode of research and the theory and practice of normal economics i never considered myself a revolutionary indeed quite the contrary but as an exponent of labor market segmentation in the community of normal economics i can assure you that labor market segmentation does not fit the paradigm the sentiments and reactions which kuhn tells us greet the abnormal and aparadigmatic in a discipline that is fury disdain resentment sarcasm and condescension have definitely greeted labor market segmentation this is a matter of fact an observation about praxis the question is then what aspect of the conceptual structure of the discipline accounts for this practical result in most discussions labor market segmentation is contrasted with human capital theory but this does not account for the hostile reception it has received it fails first because the treatment accorded market segmentation by the profession is not that different from the treatment accorded human capital when it first appeared gary becker describes his personal experience on this score in the introduction to his book of essays the economic approach to human behavior and the disdain and antagonism which he attributes to his colleagues are at least as great as anything experienced by the proponents of segmentation but perhaps more fundamentally the two views are not as we shall see shortly necessarily in conflict professor of economics mitsui professor for probems of contemporary technology massachusetts intitute of technology

a multinomial logit approach to exchange rate policy classification with an application to growth we model a country s de jure exchange rate policy as the choice from a multinomial logit response conditioned on the volatility of its bilateral exchange rate the volatility of its international reserves and the volatility of its effective exchange rate the category with the highest predictive probability implied by the logit regressions serves as our de facto exchange rate policy an empirical investigation into the relationship between the de facto classifications and gdp growth finds that growth is higher under stable currency value policies for non industrialized countries a more nuanced characterization of exchange rate policy finds that those who exhibit fear of floating experience significantly higher growth

on the short and long run efficiency of energy and precious metal markets this article contributes to the related literature by empirically investigating the efficiency of nine energy and precious metal markets over the last decades employing several pronounced models we test for both short and the long run efficiency using in addition to linear cointegration models nonlinear cointegration and error correction models ecms which allow the efficiency intensity to change per regime our findings can be summarized as follows i futures prices are found to be cointegrated with spot prices but they do not constitute unbiased predictors of future spot prices ii the hypothesis of risk neutrality is rejected iii the short run efficiency hypothesis is rejected suggesting that using past futures price returns improves the modeling and forecasting of future spot prices and iv the nonlinear modeling suggests the presence of two distinct regimes wherein the first regime the efficiency hypothesis is supported whereas in the second it is rejected the empirical findings have important implications for producers hedgers speculators and policymakers

on the welfare benefits of an international currency abstract is it beneficial for a country s currency to be used internationally and if so can we quantify the benefit since the emergence of the euro there has been great interest in the consequences of a transfer of the dollar s premier international role to the euro this paper presents a novel model based approach towards assessing the welfare benefits associated with the international use of a country s currency apart from the familiar benefits associated with seigniorage residents of the issuing country experience an increase in the purchasing power of their currency both at home and abroad in the calibration exercise carried out in this paper we find the benefits of an international currency to be quantitatively significant the welfare gain for the euro area in having the euro internationally used ranges from 1 9 to 2 3 of consumption depending on relative inflation rates the rest of the world is not indifferent as to which currency circulates as the dominant international currency conditional on their currency not being used internationally their preference is for the dominant international currency to be the one with the lowest inflation rate

determining global currency bloc equilibria an empirical strategy based on estimates of anchor currency choice the study presents an empirical strategy for determining global currency bloc equilibria the procedure includes first a nested logit estimation of the combined determinants of currency regime and anchor currency choice second a test for a welfare maximizing regime decision in which estimates of the relative welfare of alternative regimes are inferred from the results of the first step estimation and third taking the path dependency of regime choice into account a currency bloc equilibrium is derived in equilibrium the dollar bloc is somewhat smaller and the euro bloc larger than at present counterfactual exercises assess among others the potential for a renminbi bloc

value at risk estimations of energy commodities via long memory asymmetry and fat tailed garch models abstract in this paper we evaluate the value at risk var and the expected shortfalls for some major crude oil and gas commodities for both short and long trading positions classical var estimations as well as riskmetrics and other extensions to cases considering for long range memory asymmetry and fat tail in energy markets volatility were conducted we computed the var for three arch garch type models including figarch fiaparch and hygarch these models were estimated in the presence of three alternative innovation s distributions normal student and skewed student our results show that considering for long range memory fat tails and asymmetry performs better in predicting a one day ahead var for both short and long trading positions moreover the fiaparch model outperforms the other models in the var s prediction these results present several potential implications for energy markets risk quantifications and hedging strategies

modeling and forecasting crude oil markets using arch type models this study investigates the time varying volatility of two major crude oil markets the west texas intermediate wti and europe brent a flexible autoregressive conditional heteroskedasticity arch model is used to take into account the stylized volatility facts such as clustering volatility asymmetric news impact and long memory volatility among others the empirical results indicate that the intensity of long persistence volatility in the wti is greater than in the brent it is also found that for the wti the appreciation and depreciation shocks of the wti have similar impact on the resulting volatility however a leverage effect is found in brent although both the estimation and diagnostic evaluations are in favor of an asymmetric long memory arch model only the wti models provide superior in the out of sample forecasts on the other hand from the empirical out of sample forecasts it appears that the simplest parsimonious generalized arch provides the best forecasted evaluations for the brent crude oil data

is efficiency of crude oil market affected by multifractality evidence from the wti crude oil market in this paper we investigate the dynamics of relationship between efficiency and multifractality of wti crude oil market based on the cross correlation analysis and the nonlinear granger causality analysis we find that the inefficiency and multifractality of the wti crude oil returns interact positively in a nonlinear mechanism this suggests that the increase of multifractality degree will lead to the lower degree of market efficiency and vice versa our findings have some important implications for oil price forecasting and portfolio management

daily seasonality in crude oil returns and volatilities abstract in this article we test for the existence of daily seasonality in returns and volatilities of crude oil using a dummy augmented garch specification for the period from may 1987 to october 2013 our key findings are as follows i volatilities on mondays are significantly higher than on all other weekdays providing the important insight that seasonal effects should be considered when forecasting crude oil volatility ii returns on the other hand tend to be lower on mondays than on other weekdays suggesting profitable investment strategies based on this seasonal pattern in fact the analysis of a simple long short trading rule based on the monday effect provides some evidence that it can outperform a passive buy and hold approach however it cannot do so to an extent that is statistically significant iii our seasonality results are fairly robust to the choice of other frequently used garch model variants like garch m tgarch and cgarch

price discount inventories and the distortion of wti benchmark abstract applying a rolling estimation to the hasbrouck information share model this study investigates the changing status of wti benchmark over time results show the ability of wti in reflecting market conditions decreases sharply and wti s efficiency in processing information has been surpassed by brent s since the second half of 2004 in the short run the wti distortion is related to its price discount problem but the distortion cannot be indicated by contangos in the long run wti s price discount problem coexists with a positive forward curve and both have harmed the price discovery role of wti the rising inventories in cushing significantly deteriorate wti s ability in serving as a world benchmark

unemployment and the efficiency wage hypothesis there has been much recent discussion of the reasons why prices in certain markets and in particular in labour markets may not adjust to eliminate excess supply the absence of speedy adjustment of prices is an essential feature of the recent models of disequilibrium macroeconomics but for the most part no explanation for this absence is provided from within those models one explanation that has been around in the literature for some time and has been receiving increasing attention recently is the efficiency wage hypothesis initially applied to developing economies see leibenstein i957 it has more recently been adapted to developed economies by weiss i 980 and used in the context of a keynesian macroeconomic model by hart i 980 similar concepts have been applied to the credit market by stiglitz and weiss i98i the purpose of the present paper is to explore further the conditions under which the notion of an efficiency wage is applicable and can provide an explanation of involuntary unemployment the essential feature of the efficiency wage hypothesis is that the productivity of a firm s employees increases as their wage is increased at least over an economically relevant part of its range if the wage paid by the firm is denoted by w the number of employees by l and the productivity of each employee by p w where p w o then the effective labour force of the firm e can be represented by

currency competition network externalities and switching costs towards an alternative view of optimum currency areas existing models of currency competition and monetary union ignore network effects and switching costs this paper develops a simple model that incorporates these features and shows how it can be used to shed light on observed monetary experience and current issues in international monetary relations it explains why agents will often be reluctant to switch currencies highlights the role of expectations and sheds light on the nature of currency competition and the effect of legal restrictions copyright 1993 by royal economic society

adaptive learning and the transition to fiat money this article explores some implications of adaptive learning for monetary evolution using a search theoretic framework that allows for media of exchange network effects adaptive learning precludes any voluntary transition to a fiat standard from a non monetary state of nature and can account for the historically observed tendency for fiat monetary standards to emerge only following the prior appearance of commodity money and the widespread employment of redeemable banknotes adaptive learning can also account for governments frequent resort to coercive measures to force a switch to fiat money and for their ability to affect such a switch even when doing so is not pareto optimal exchange media fall into the general category of products for which the utility that a user of the good derives from use of the good increases with the number of other agents using the good katz and shapiro 1985 p 424 there are two reasons for these positive network effects 1 indirect the more agents who employ a particular medium of exchange the more likely it is that prices will be quoted in terms of that medium of exchange i e that the medium of exchange will also serve as the economy s principle medium of account the costs of exchange are less for a medium of exchange that trades at par this indirect external effect is analogous to one encountered in computer hardware the more purchasers of a particular kind of hardware the more likely manufacturers of software are to supply compatible products 2 direct the more persons who use a particular exchange medium the better its quality or performance this direct network effect is analogous to one encountered in communications technologies such as telephones the analogy is especially close for fiat money which is useless to an isolated individual this article examines some ways in which media of exchange network effects influence the evolution of monetary standards and especially their role in determining both when and how a transition may occur from barter or commodity money to fiat money the approach taken here emphasises the role of adaptive learning where agents select exchange strategies that reflect static expectations concerning other agents preferred strategies although the exchange game agents play generally has multiple nash equilibria including one in which all agents accept fiat money adaptive learning precludes a spontaneous transition from barter to a fiat monetary standard even where a fiat standard would be welfare enhancing yet such learning does not rule out the spontaneous evolution of a commodity money standard or the eventual substitution of redeemable banknotes for commodity money readers familiar with the literature on network effects will recognise this

are the crude oil markets becoming weakly efficient over time a test for time varying long range dependence in prices and volatility this paper analyzes the efficiency of crude oil markets brent and west texas intermediate by means of estimating the fractal structure of these time series we test for time varying degrees of long range dependence using the rescaled range hurst analysis and find evidence that this market has become more efficient over time these results are robust for controlling for short term autocorrelation by means of a shuffling procedure

the parallel currency approach to asian monetary integration since the crisis of 1997 1998 there has been a proliferation of proposals for fostering asian monetary integration asian countries it is suggested should collectively peg their currencies to the dollar the yen or a dollar yen euro basket or establish a multilateral currency grid like the european monetary system ems the resulting exchange rate stability would promote intraregional trade simplify investment planning and encourage cross border participation in local bond markets experience with establishing and maintaining a system of stable exchange rates would help ready the region for the introduction of a single currency asia in this view should emulate europe s approach to regional monetary integration along with the attractions of the european example however there are also dangers defending a system of currency pegs in the presence of high capital mobility requires the close convergence of policies and the maintenance of confidence if either precondition is disturbed a country will require extensive financial support in order to defend its peg or to undertake an orderly realignment in practice asian countries possess neither the willingness to subordinate other policies to these imperatives nor the solidarity needed to offer extensive financial supports absent an appetite for political integration there is little readiness to create a regional central bank like the european central bank since there is no counterpart to the european parliament to hold it accountable for its actions hence there is little prospect of early monetary union to tie down expectations a system of asian currency pegs would consequently be fragile and crisis prone as a road to monetary unification it would be a dead end it would be better for governments to create an asian currency unit acu constituted as a weighted average of asian currencies and allow it to circulate alongside their national currencies this would have three advantages first it would not be necessary to stabilize exchange rates between the currencies comprising the basket hence fragility would be less second the parallel currency would be more stable than any one national currency in terms of aggregate asian production and exports it would thus be a vehicle for encouraging intraregional trade and investment third the decision to move to a single currency could be driven by economics rather than politics only when a critical mass of producers exporters and investors had adopted the parallel currency would it be clear that asian economies were ready for monetary unification

crude oil market efficiency and modeling insights from the multiscaling autocorrelation pattern abstract empirical research on market inefficiencies focuses on the detection of autocorrelations in price time series in the case of crude oil markets statistical support is claimed for weak efficiency over a wide range of time scales however the results are still controversial since theoretical arguments point to deviations from efficiency as prices tend to revert towards an equilibrium path this paper studies the efficiency of crude oil markets by using lagged detrended fluctuation analysis dfa to detect delay effects in price autocorrelations quantified in terms of a multiscaling hurst exponent i e autocorrelations are dependent of the time scale results based on spot price data for the period 1986 2009 indicate important deviations from efficiency associated to lagged autocorrelations so imposing the random walk for crude oil prices has pronounced costs for forecasting evidences in favor of price reversion to a continuously evolving mean underscores the importance of adequately incorporating delay effects and multiscaling behavior in the modeling of crude oil price dynamics

exchange rate regimes and inflation only hard pegs make a difference abstract using data from a large sample of developing countries from 1985 to 2001 we confirm that hard pegs currency boards or a shared currency reduce inflation and money growth there is no evidence that soft pegs confer any monetary discipline after other factors are controlled for inflation triggers regime switches under hard pegs monetary growth is unaffected by fiscal deficits or by inflation shocks under soft pegs as under floats increased fiscal deficits and positive inflation shocks are associated with higher monetary growth the apparently slower per capita output growth under hard pegs is explained by their geographical distribution jel classification f41

trends in world energy prices the correct identification of the time series path of non renewable energy resources has far reaching consequences for economists and policymakers alike this study builds on the existing literature by employing a data series that includes a sample period of institutional change and recently developed unit root testing procedures besides crude oil natural gas and coal prices are also examined aiming to further the knowledge of non renewable energy resource time paths in order to inform future research and update the conclusions of past studies the unit root tests allow for structural breaks and are based on the procedures developed by zivot and andrews 1992 lumsdaine and papell 1997 and lee and strazicich 2003 finally we investigate whether the trend changes signs in the regimes which are bounded by the structural breaks and quantify the prevalence of the trends over the sample period considered the results show that the trend is not well represented by a single positive or negative trend the variability of the trend suggests that forecasting energy prices should not typically occur about a single trend

disentangling the determinants of real oil prices in this study we quantify the impacts of economic fundamentals and derivative market speculation on the real price of crude oil using a structural var with sign restriction we determine that oil demand from the us and china particularly the latter one plays a crucial role in oil price changes after the year 2000 the contribution of speculation does not exceed 10 of oil price variations in our sample period

multiscale entropy analysis of crude oil price dynamics abstract price formation in crude oil markets is the result of the action of many participants e g producers governments speculators etc whose effects are perceived at different time scales from days to years the diversity of participants as well as the occurrence of extreme socio political events yields a market with complex price evolution this paper uses entropy methods to monitor the evolution of crude oil price movements as the complexity of the price can depend of the time horizon entropy computations are performed for different time scales via low pass filtering of the price difference dynamics the results are interpreted in term of relative market efficiency concepts in the sense that high entropy values should be related to a more complex and hence less predictable market evolution it is shown that the highest market efficiency is found for small time scales up to one or two weeks the multiscale entropy pattern for high time scales longer than one quarter is interesting as it shows alternating periods of high and low entropy levels interestingly this alternating pattern has a dominant spectral component of about 4 3 years which could be related to macroeconomic kitchin business cycles it is shown that u s recessions in the recent 25 years are coincident with periods of reduced entropy levels meaning that during economic downturn the long run market complexity is drastically reduced the possible effects of extreme events e g iraq war are analyzed in terms of the relative market efficiency suggesting that some events have affected the short term but not the long term market complexity overall these results show that methods based on entropy concepts can shed light on the structure of crude oil markets as well as on its link to macroeconomic conditions and socio political extreme events

the inefficiency of unemployment the supervision perspective we study an example economy with costly labor monitoring under a wage cum supervision arrangement where workers utilities are not equalized across sectors workers are identical to each other our main task is to look for and find a set of flat taxes and subsidies that bring about a pareto improvement over the laissez faire solution we show that any of such welfare improving schemes involves a tax on labor income from those workers whose utility is the lowest

the economic determinants of the choice of an exchange rate regime a probit analysis abstract probit models were used to analyze the choice of exchange rate regimes by developing countries in the period 1977 1995 the results show the preeminence of criteria postulated in the theory of optimum currency areas i e individual structural characteristics

national culture and the choice of exchange rate regime abstract based on the social analysis framework of williamson we argue that national culture especially the individualism collectivism dimension located in the social embeddedness level can guide behaviors and decisions in a country including the choice of exchange rate regime we argue that individualistic societies are more likely to choose floating regimes because their economic agents are independent overconfident and have higher levels of risk tolerance individualistic societies are also associated with better financial development fewer capital controls and more democratic institutions which are all tied to a higher probability of choosing a floating exchange rate regime we use data on 78 countries over the 1976 2014 period and we control for common determinants of exchange rate regimes we find that individualistic countries have a significantly higher probability of implementing a floating regime than a fixed regime our evidence is robust to using an instrumental variables approach an alternative estimation technique an alternative regime classification alternative proxies for culture a subsample analysis and additional controls we also find that other cultural dimensions uncertainty avoidance power distance and masculinity can influence the choice of exchange rate regime but their effect is weaker than that of individualism

measuring the brazilian ethanol and gasoline market efficiency using dfa hurst and fractal dimension abstract the ethanol and petroleum represent important energy commodities brazil is one of the world s largest producers of ethanol and became one of the ten largest global oil explorers in 2018 this paper proposes the detrended fluctuation analysis dfa hurst exponent h and fractal dimension d to investigate the dynamic behavior of ethanol and gasoline prices series in brazil furthermore a new market efficiency measure namely the efficiency index ei is also proposed some on going change toward a more efficient market in the follow up of an institutional political change is analyzed the data series are obtained from the national agency of petroleum and the natural gas and biofuels anp weekly spot prices are used for time windows covering two periods the first period p 1 precedes the brazilian presidential impeachment occurred in 2016 and includes data from january 2011 to december 2015 the second p 2 addresses the period from july 2016 to july 2018 covering the post impeachment scenario with new government policies in the energy sector the results indicate a subtle path toward market efficiency for the ethanol and a clear moving toward better efficiency for the gasoline market after changes in the fuel policy of brazil moreover the h and d indices prove to be useful tools for tackling the price dynamics of the fuel market and to build the new measure ei

trading on mean reversion in energy futures markets abstract we study whether simple technical trading strategies enjoying large popularity among practitioners can be employed profitably in the context of hedge portfolios for crude oil natural gas gasoline and heating oil futures the strategies tested are based on mean reverting calendar spread portfolios established with dynamic hedge ratios entry and exit signals are generated by so called bollinger bands the trading system is applied to twenty two years of historical data from 1992 to 2013 for various specifications taking transaction costs into account the significance of the results is evaluated with a bootstrap test in which randomly generated orders are compared to orders placed by the trading system whereas we find most combinations involving the front month and second month futures to be significantly profitable for all commodities tested the best results for the risk adjusted sharpe ratio are obtained for wti crude oil and natural gas with sharpe ratios in excess of 2 for most combinations and a rather smooth performance for all calendar spreads based on our results there is a serious doubt whether energy futures markets can be considered weakly efficient in the short term

are the crude oil markets really becoming more efficient over time some new evidence abstract we replicate the study of tabak cajueiro 2007 are the crude oil markets becoming weakly efficient over time a test for time varying long range dependence in prices and volatility published in energy economics 29 pp 28 36 the results have been mostly confirmed specifically we have confirmed that the crude oil markets efficiency could be rejected up till approximately 1994 and this holds for both studied crude oil commodities brent and wti analyzing an extended dataset up till june 2017 we find that the markets remained efficient at least with respect to long range dependence until the outbreak of the global financial crisis in 2008 this is confirmed by all three applied methods the rescaled range analysis used in the original study and the detrended fluctuation analysis and the geweke porter hudak estimator which were added to strengthen validity of the results the markets returned back to efficiency around 2012 and remained there until 2015 when the hurst exponent started another rally and stayed rather high until the end of the examined sample comparing the two markets the brent crude oil shows stronger signs of inefficiency during the inefficient periods compared to the wti crude oil this is in hand with the results reported in the original study apart from rerunning the analysis on an extended dataset and using two additional methods we also provide a firmer validity check using the moving block bootstrap procedure which outperforms the original shuffling procedure in the provided forecasting study

surprising similarities recent monetary regimes of small economies in contrast to earlier recessions the monetary regimes of many small economies have not changed in the aftermath of the global financial crisis this is due in part to the fact that many small economies continue to use hard exchange rate fixes a reasonably durable regime however most of the new stability is due to countries that float with an inflation target though a few have left to join the eurozone no country has yet abandoned an inflation targeting regime under duress inflation targeting now represents a serious alternative to a hard exchange rate fix for small economies seeking monetary stability are there important differences between the economic outcomes of the two stable regimes i examine a panel of annual data from more than 170 countries from 2007 through 2012 and find that the macroeconomic and financial consequences of regime choice are surprisingly small consistent with the literature business cycles capital flows and other phenomena for hard fixers have been similar to those for inflation targeters during the global financial crisis and its aftermath

what are the categories of geopolitical risks that could drive oil prices higher acts or threats abstract this study characterizes the oil market as a nonlinear switching phenomenon and examines its dynamics in response to changes in geopolitical risks over low and high risk scenarios we separate the shocks due to geopolitical acts from those due to geopolitical threats to address whether the serious effects of geopolitical risks are mostly due to increased threats of adverse events or to their realization as acts while we find the acts to generate a positive and strong impact on oil price dynamics the effect of threats appears to be moderate or non significant imperfect information in the oil price determination the history of oil supply disruptions emanating from geopolitical events the continued rise in populism in the world oil market volatility multifractility and the time varying degree of weak form efficiency have been advanced to explain the unforeseen responses of oil prices to geopolitical threats to accommodate recent oil related events we construct a composite geopolitical risk indicator by accounting for contemporaneous sources of geopolitical risks namely global trade tensions us china relation risks us iran tensions saudi arabia s uncertainty and venezuela s crisis the combined effects have an outsized impact on oil prices

bitcoin and the legitimacy crisis of money the virtual currency and payment project bitcoin intends to challenge the current monetary and payment system that finds itself in a legitimacy crisis in the aftermath of the financial market turmoil of 2008 in examining the governance of the bitcoin system i try to assess its potential to create input and output legitimacy as a payment system and as a monetary system in comparison with current practice

testing the evolution of crude oil market efficiency data have the conn utilising a time varying gar 1 tgarch 1 1 model with different frequency data we investigate the weak form efficiency of major global crude oil spot markets in europe the us the uae and china for the period from december 2001 to august 2013 our empirical results with weekly data indicate that all four markets have reached efficiency with few brief inefficient periods during the past decade whereas the daily crude oil returns series suggest intermittent and inconsistent efficiency we argue that the weekly friday series fit the data better than the average series in autocorrelation tests the evidence suggests that all four markets exhibit asymmetries in return volatility reactions to different information shocks and that they react more strongly to bad news than to good news the 2008 financial crisis has significantly affected the efficiency of oil markets furthermore a comovement phenomenon and volatility spillover effects exist among the oil markets policy recommendations consistent with our empirical results are proposed which address three issues implementing prudential regulations establishing an asian pricing centre and improving transparency in crude oil spot markets

random fractal structures in north american energy markets this paper uses daily observations on west texas intermediate wti crude oil prices at chicago and henry hub natural gas prices at la over the deregulated period of the 1990s and various tests from statistics and dynamical systems theory to support a random fractal structure for north american energy markets in particular this evidence is supported by the vassilicos et al 1993 multifractal structure test and the ghashghaie et al nature 381 1996 767 turbulent behavior test

time varying long range dependence in energy futures markets abstract this study aims to investigate the presence of long range dependence in energy futures markets using a daily dataset covering from 1990 to 2013 which includes crucial events for energy markets such as invasion of iraq and global financial crisis of 2008 we estimate time varying generalized hurst exponents of several energy futures contracts with different times to maturity using a rolling window approach results reveal that efficiency of energy futures markets is clearly time varying and changes drastically over the sample period for futures contracts with 1 4 months to maturities crude oil and gasoline are found to be more efficient compared to others on the other hand for contracts with 5 9 months to maturities crude oil and natural gas futures are more efficient for almost every different month to maturity heating oil and gas oil futures are found to be the least efficient markets moreover in general the efficiency of energy futures markets is found to be decreasing dramatically when time to maturity is increasing several implications are discussed

modeling and forecasting the volatility of petroleum futures prices we investigate volatility models and their forecasting abilities for three types of petroleum futures contracts traded on the new york mercantile exchange west texas intermediate crude oil heating oil 2 and unleaded gasoline and suggest some stylized facts about the volatility of these futures markets particularly in regard to volatility persistence or long memory properties in this context we examine the persistence of market returns and volatility simultaneously using the following arfima garch class models arima garch arfima garch arfima igarch and arfima figarch although the arfima figarch model better captures long memory properties of returns and volatility the out of sample analysis indicates no unique model for all three types of petroleum futures contracts suggesting that investors should be careful when measuring and forecasting the volatility risk of petroleum futures markets

commodity futures and market efficiency we propose a comprehensive treatment of the leverage effect i e the relationship between returns and volatility of a specific asset focusing on energy commodities futures namely brent and wti crude oils natural gas and heating oil after estimating the volatility process without assuming any specific form of its behavior we find the volatility to be long term dependent with the hurst exponent on a verge of stationarity and non stationarity to overcome such complication we utilize the detrended cross correlation and the detrending moving average cross correlation coefficients and we find the standard leverage effect for both crude oils and heating oil for natural gas we find the inverse leverage effect additionally we report that the strength of the leverage effects is scale dependent finally we also show that none of the effects between returns and volatility is detected as the long term cross correlated one these findings can be further utilized to enhance forecasting models and mainly in the risk management and portfolio diversification

tracking euro preparations amongst uk smes this paper tracks levels of euro preparations by uk smes with trade links with the euro currency area using two surveys of the same cross sectional dataset the first study was conducted soon after the initial launch of the euro in 1999 the second study using the same smes sought to see how euro preparations had changed by 2002 following the introduction of euro notes and coins at the univariate level the results showed that the proportion of smes that were totally prepared increased from 31 to 44 3 whilst the proportion not prepared has also increased from 8 9 to 12 2 the multivariate results show that directly trading manufacturers with a parent in the euro area or who are seeking to acquire another company are more likely to have partially prepared for the euro which suggests a compliant just another foreign currency rather than a strategic approach to the euro trade links do not explain all the differences incorporated manufacturing firms are significantly more likely to be partially

do announcements of wto dispute resolution cases matter evidence from the rare earth elements market abstract rare earth elements rees have gained increasing attention recently for several key reasons 1 they are vital to many strategic industries 2 they are relatively scarce 3 they frequently exhibit high price fluctuations 4 china holds a quasi monopoly on their mining and 5 china s ree policy which was overly restrictive and led to a formal complaint from the u s japan and the eu at the world trade organization wto in 2012 this paper investigates whether the announcement of a wto dispute resolution case has the power to fundamentally change market dynamics we find empirical support for this notion because ree prices exhibit a structural break around the announcement of the wto dispute and show lower variance ratios for all tested rees afterward this indicates a tendency toward efficiency although ree prices still do not follow a random walk similarly we find that stock price informativeness of companies in the ree industry increases after the announcement reflecting more firm specific than marketwide information and less governmental influence finally we show that model uncertainty for option pricing models decreases which we measure by the lower pricing differences among them

war peace and private portfolios abstract during civil wars trading is profitable as markets fragment profits may be saved in liquid form because investment is too risky in a successful economic transition to peace these liquid assets are switched into investment continuing fears of insecurity however may keep portfolios liquid we consider three policy consequences the unpredictable return of confidence causes erratic changes in the demand for money complicating monetary targeting government liabilities become unmarketable except at prohibitive interest rates though the state may be able to sell real assets the government can subsidize the act of investment commitment by temporarily undervaluing the exchange rate

critical mass effect and restructuring in the transition towards a market economy abstract restructuring firms in a transition economy produces a sort of network externality in that the profitability of restructuring depends on the number of firms that already adopted this strategy we investigate under what conditions a critical mass exists i e a situation in which such externality is positive and restructuring spurs imitation possibly leading to the eventual transformation of the whole economy we find a critical mass effect when the main effect of restructuring is an increase in value added i e aggregate demand rather than an increase in the firm s ability to compete against rival home firms the critical mass case becomes the typical one when competition spurs firms efficiency

a note on keynesian unemployment as a worker discipline device abstract keynesian sales constraints are introduced into a model with endogeneous wages and involuntary equilibrium umemployment the result is a lower real wage and a higher unemployment rate

open economy macroeconomics developments in theory and policy this paper views developments in open economy macroeconomics through the lens of the debate over european monetary unification the empirical tendency for nominal exchange rate regimes to affect the variability of nominal and real exchange rates alike can be rationalized by sticky price theories or models of asset market liquidity effects but plausible liquidity models have difficulty generating enough persistence to match the data thus the macroeconomic stabilization costs of forgoing the exchange rate realignment option seem pertinent it is argued that our theories of efficiencies due to a common currency remain unsatisfactory despite recent advances the paper concludes by reviewing theories of currency crisis

the worker discipline effect a disaggregative analysis the authors test for the presence of a worker discipline effect wherein macroeconomic conditions influence worker effort and examine interindustry variation in its strength an employment function analysis is first used to find evidence of a worker discipline effect in the majority of u s three digit manufacturing industries a factor analysis of industry firm and labor market characteristics is then used to identify several underlying factors by which industries can be distinguished the authors find that the strength of the worker discipline effect is positively and significantly correlated with the degree to which industries have secondary characteristics copyright 1990 by mit press

are the crude oil markets becoming more efficient over time new evidence from a generalized spectral test this paper utilizes the newly developed method of a generalized spectral test to examine the weak form efficiency of the main worldwide crude oil markets the generalized spectral test unlike other methods can detect both linear and nonlinear serial dependence in the conditional mean and allows for different forms of unknown conditional heteroscedasticity by using a rolling sample approach instead of an analysis of different time periods we find that the efficiency of oil markets may depend on time periods the main global crude oil markets reach weak form efficiency in the long term and the degree of efficiency of global oil markets changes over time among the oil markets examined in this study the brent and the wti oil markets possess the highest efficiency levels whereas the daqing oil market has the lowest efficiency level apparent anti synchronization is detected between the efficiency of brent and wti markets in recent years whereas synchronization is found between the efficiency of daqing and dubai oil markets during the last decade

the modern history of exchange rate arrangements a reinterpretation we develop a novel system of reclassifying historical exchange rate regimes one key difference between our study and previous classifications is that we employ monthly data on market determined parallel exchange rates going back to 1946 for 153 countries our approach differs from the imf official classification which we show to be only a little better than random it also differs radically from all previous attempts at historical reclassification our classification points to a rethinking of economic performance under alternative exchange rate regimes indeed the breakup of bretton woods had less impact on exchange rate regimes than is popularly believed

international currency exposures valuation effects and the global financial crisis abstract we examine the evolution of international currency exposures with a particular focus on the 2002 12 period during the run up to the global financial crisis there was a widespread shift towards positive net foreign currency positions such that relatively few countries exhibited the archetypal emerging market short foreign currency position on the eve of the global financial crisis during the crisis the upheaval in currency markets generated substantial currency generated valuation effects much of which were not reversed there is some evidence that the distribution of valuation effects was stabilizing in the sense of showing a negative covariation pattern with pre crisis net foreign asset positions