improving prediction market forecasts by detecting and correcting possible over reaction to price movements abstract we examine the impact of price trends on the accuracy of forecasts from prediction markets in particular we study an electronic betting exchange market and construct independent variables from market price odds time series from 6058 individual markets a dataset consisting of over 8 4 million price points using a conditional logit model we find that a systematic relationship exists between trends in odds and the accuracy of odds implied event probabilities the relationship is consistent with participants over reacting to price movements in particular in different time segments of the market increasing and decreasing odds lead respectively to under and over estimation of odds implied probabilities we develop a methodology to detect and correct the erroneous forecasts associated with these trends in odds in order to considerably improve the quality of forecasts generated in prediction markets

methodical madness technical analysis and the irrationality of exchange rate forecasts substantial empirical research documents that exchange rate forecasts are not formed rationally this paper identifies a common technical trading signal the head and shoulders pattern as a potential source of departures from rationality in exchange rate forecasts forecasts based on this pattern are evaluated for daily dollar exchange rates over 1973 to 1994 using two criteria for rationality profitability and efficiency resulting profits replicable in real time are tested for statistical significance using a bootstrap technique we find that the rule is profitable but not efficient since it is dominated by simpler trading rules

exchange rate overshooting the trade balance and rational expectations abstract this paper presents a model of exchange rate determination characterized by imperfect asset substitutability between domestic and foreign bonds sticky goods market prices and rational expectations the model is used to analyze the response of the exchange rate to a step change in relative money supplies the assumption of imperfect asset substitutability permits introduction into the analysis of trade flows which respond to relative price changes these flows create non monotonic exchange rate adjustments to long run equilibrium these non monotonic adjustments are consistent with rationality and may lead to short run undershooting or overshooting

information and efficiency goal arrival in soccer betting an efficient market incorporates news into prices immediately and fully tests for efficiency in financial markets have been undermined by information leakage we test for efficiency in sports betting markets real world markets where news breaks remarkably cleanly applying a novel identification to high frequency data we investigate the reaction of prices to goals scored on the cusp of half time this strategy allows us to separate the market s response to major news a goal from its reaction to the continual flow of minor game time news on our evidence prices update swiftly and fully

the effect of fast trading on price discovery and efficiency evidence from a betting exchange abstract we examine how the presence of fast traders impacts price discovery and efficiency in a real world setting i e courtsiding the activity of live betting from a tennis stadium this setting allows us to isolate the activity of fast acting traders who have a short term monopolistic access to important information with respect to other traders who trade based on delayed tv images using live tennis betting data combined with detailed point by point match data our results show that courtsider trading promotes quick price discovery and correctly incorporates new information into prices we estimate that a simple trading strategy yields a positive trading return to fast traders after the occurrence of important informational events

theoretical relations between risk premiums and conditional variances many statistical models of time varying risk premiums including the autoregressive conditional heteroscedasticity arch in mean attempt to exploit a relation between risk premiums and conditional variances or covariances of asset returns we examine this relation in numerical versions of a dynamic asset pricing theory and show that it can be increasing decreasing flat or nonmonotonic its shape depends on both the preferences of the representative agent and the stochastic structure of the economy without additional structure the theory does not provide either a general foundation for arch in mean specifications or a simple interpretation of their parameters

market efficiency in agricultural futures markets market efficiency and unbiasedness are tested in four agricultural commodity futures markets live cattle hogs corn and soybean meal using cointegration and error correction models with gqarch in mean processes results indicate each market is unbiased in the long run although cattle hogs and corn futures markets exhibit short run inefficiencies and pricing biases models for cattle and corn outperform futures prices in out of sample forecasting results also suggest short run time varying risk premiums in cattle and hog futures markets

in search of the exchange risk premium a six currency test assuming mean variance optimization abstract a number of authors examining deviations of actual rates of currency depreciation from forward discounts have claimed to find evidence of risk premiums if these deviations are indeed partly due to risk premiums rather than being entirely due to expectational errors then they should be systematically related to those variables on which risk premiums are thought to depend finance theory tells us that if investors optimize with respect to mean and variance the risk premium depends in a specific way on 1 the supplies of assets denominated in the various currencies 2 the variance covariance matrix of the rates of return and 3 the coefficient of risk aversion the null hypothesis of this paper is that the coefficient of risk aversion is zero countries assets are perfect substitutes and risk premiums are nonexistent the alternative hypothesis is that rates of return are systematically related to asset supplies by a macroeconomic portfolio balance function the maximum likelihood technique used dominates previous attempts to find such a relationship in that the parameters of the portfolio balance function are constrained to depend on the variance covariance matrix as the finance theory says they should on the other hand the technique also dominates previous applications of the finance theory in that the expected returns are allowed to vary over time as the macroeconomic portfolio balance theory says they should the paper s finding is a statistical inability to reject the null hypothesis for a portfolio of six currencies although this could be due to low power in the test

endogenous risk in a portfolio balance rational expectations model of the deutschemark dollar rate abstract a portfolio balance model of the dm s rate under rational expectations is specified in which systematic risk induced deviations from uncovered interest parity are allowed this leads to a reduced from containing a potentially time varying risk premium which we approximate and estimate using an arch in mean approach the maximum likelihood estimator and a lagrande multiplier test for arch in mean are developed the estimation results indicate a small but non negligible time varying risk premium

a portfolio balance rational expectations model of the dollar mark exchange rate abstract a model is developed in which current account imbalances can be financed through transfers of bonds denominated in either currency the reduced form links the current spot rate to the expected future spot rate via a risk premium which depends on the global currency mix of outside assets that governments impose on private portfolios through budget deficits and interventions and on the global distribution of private wealth among regions with different portfolio preferences an iterative procedure generates rational expectations forecasts of the dollar mark rate which perform somewhat better than forward rates in predicting monthly changes in the spot rate

risk response in the beef marketing channel a multivariate generalized arch m approach a model of the farm retail price spread for beef is specified under rational expectations in which systematic risk response on the part of marketing intermediaries is allowed the three equation structural model contains potentially time varying risk terms in margin and supply equations which i approximate and estimate using a multivariate garch in mean approach the estimated model is used to infer relative risk premia in beef margins and to simulate short run equilibrium risk effects results indicate that price risk has at times had substantial impacts on farm and retail beef prices and production

relative pricing of binary options in live soccer betting markets abstract live soccer betting markets differ from other binary options markets in that all fundamental information is observable the options mature in less than two hours and the markets are highly liquid this study presents a new method for the identification of hidden information in market prices the method is based on two independent poisson distributions and on a numerical algorithm for the aggregation of all market price information into one rational number the method is applied to an empirical dataset of real time market prices in 29 413 soccer games the results indicate that the method selects the most profitable markets and allows for a significant improvement in average investment returns

predicting catastrophe risk evidence from catastrophe bond markets abstract compared to the past literature on prediction markets that uses small scale observational field data or experiments this present research examines the efficiency of such markets by studying catastrophe cat bonds we collect actual catastrophe loss data match them with the defined trigger events of each cat bond contract and then employ an empirical pricing framework to obtain the excess cat premiums in order to represent the market based forecasts our results indeed show that market based forecasts have more significant predictive content for future cat losses than professional forecasts that use natural catastrophe risk models although the predictive information for cat events is specialized and complex our evidence supports that cat bond markets are successful prediction markets that efficiently aggregate information about future cat losses our resultsalso highlight that actual cat losses in future periods can explain the excess cat bond spreads in the primary market and provide support for market efficiency when pricing cat risk

rational expectations and the aggregation of diverse information in laboratory security markets the idea that markets might aggregate and disseminate information and also resolve conflicts is central to the literature on decentralization hurwicz 1972 and rational expectations lucas 1972 we report on three series of experiments all of which were predicted to have performed identically by the theory of rational expectations in two of the three series one in which participants trade a complete set of arrow debreu securities and a second in which all participants have identical preferences double auction trading leads to efficient aggregation of diverse information and rational expectations equilibrium failure of the third series to exhibit such convergence demonstrates the importance of market institutions and trading instruments in achievement of equilibrium

asset pricing and foreign exchange risk econometric evidence for the g 7 abstract this paper uses an error correction model ecm to examine the dynamic behavioural relationship between the excess returns of foreign exchange and the variables that measure the stock market risk factor the test results for the major currencies of the g 7 over the period january 1982 to january 1994 support the hypothesis that the excess foreign exchange returns are related to relative risks of the two national equity markets and hence supports the notion of a risk premium in foreign exchange markets in addition we find evidence of non monotonic adjustment in some of the equations with respect to the us dollar which suggests some short run exchange rate overshooting

the ideology of efficiency searching for a theory of policy analysis the potential pareto improvement criterion and other measures of economic efficiency do not pass the test of consistency and coherence within economic theory nor do such measures accord with what public decision makers seek in policy advice from economists such efficiency measures are nonetheless durable components of the ideology of economics in general and benefit cost analysis in particular the objectivity of the policy scientist has been confused with the objectivity of the science while economic efficiency has no claim to objectivity the policy scientist can be an objective analyst of policy choices

testing for bubbles in exchange markets a case of sparkling rates this paper investigates the possibility that the observed deviations of major bilateral exchange rates from values implied by market fundamentals are a consequence of rational asset market bubbles when a new econometric methodology for detecting asset market bubbles is used the joint hypothesis of no bubbles and stable autoregressive processes for relative money supplies and real incomes is rejected for the dollar deutsche mark and dollar pound ratesusing monthly data over the period 1973 82 additional tests for coefficient stability and for lack of cointegration between exchange rates and market fundamentals suggest that the bubble findings must be interpreted with care

multivariate nearest neighbour forecasts of ems exchange rates exchange rate modelling has been a persistent puzzle for international economists forecasts from popular models for the exchange rate generally fail to improve upon the random walk out of sample while a multivariate nonparametric approach provides useful information about exchange rates the model produces forecasts superior to the random walk for only one of the three ems currencies examined using a statistic developed in mizrach 1991 i find that the forecast improvement a 4 5 percent reduction in mean squared error for the lira in daily returns is not statistically significant a cross validation exercise suggests that the improvement is also not robust

unifying underreaction anomalies this paper asks whether momentum and postevent drift are manifestations of the same underlying mechanism or are separate phenomena we find that both effects can be attributed to persistence in returns following news that affects expected earnings or earnings growth holding these quantities fixed there is no momentum effect nor is there postevent drift for our sample of events which includes seasoned equity offerings repurchases equity financed mergers and dividend initiations and omissions the implication is that return continuation follows fundamental news in general and in aggregate this explains momentum

exchange rate dynamics an empirical investigation this paper estimates a reduced form exchange rate equation whose estimates are used to address questions on exchange rate overshooting intermediate run exchange rate dynamics and long run proportionality relationships between relative money supplies and exchange rates based on swiss u s data from the period 1973 79 the major findings are that following a monetary shock there is short run exchange rate overshooting by a factor of about two and that subsequent exchange rate adjustments to a new long run equilibrium take longer than 2 years and exhibit nonmonotonic patterns

choices without prices without apologies valuing is usually regarded as a process of compressing information about attributes into a single metric armed with this reduced form of compact information the consumer can consider a particular object with a particular price attached or implied and make an informed decision but the process of valuing is less straightforward than we ordinarily suppose when environmental goods and services become the object of information compaction it is possible that important information is lost we comment on the choice problem germane to environmental goods and services and challenge the presumption that environmental choices made without explicit pricing are inferior to those in which hypothetical valuation studies are undertaken

the role of surprise understanding overreaction and underreaction to unanticipated events using in play soccer betting market abstract previous research in finance has found evidences of both overreaction and underreaction to unanticipated events but has yet to explain why investors overreact to certain events while underreacting to others in this paper we hypothesize that while market participants generally underreact to new events due to conservatism the extent of underreaction is moderated by surprise thus causing market participants to overreact to events that are highly surprising we test our hypothesis using data from an in play soccer betting market where new events goals are clearly and exogenously defined and the degree of surprise can be directly quantified goals scored by underdogs are more surprising we provide both statistical and economic evidences in support of our hypothesis

empirical models of the exchange rate separating the wheat from the chaff various popular exchange rate models a standard monetary model a portfolio balance model and sticky price models are estimated and evaluated using u s canadian data for the 1970s nonnested hypothesis tests demonstrate that none are correctly specified the data suggest 1 the exchange rate persistence observed is not fully explained by any of the models 2 the small durbin watson statistics indicate longer lags are required 3 the current account is a useful explanatory variable 4 the portfolio balance model fits the data well but has potentially serious problems measuring the stock of foreign assets this abstract was borrowed from another version of this item

the degree of inefficiency in the football betting market statistical tests abstract this paper tests the hypothesis that the football betting market is efficient our statistical tests are stronger than those in previous studies and we examine both nfl and college data over a sample period of fifteen years our statistical tests detect two specific biases in the nfl market and an unspecified bias in the college market we examine the year to year consistency and magnitudes of the biases and find that the nfl bias against home teams has been nearly eliminated while the bias against underdogs has increased profitable exploitation of the biases depends upon transaction costs

the virtual aquarium commodity fiction and cod fishing abstract this article deals with the commoditization and pricing of environmental goods in particular the practice and social theory of individual transferable quotas itqs in fisheries emphasizing ethnographic material related to the management system introduced in iceland in 1984 icelandic fisheries discourse i argue is increasingly textual and hegemonic dominated by marine scientists resource economists and state officials at the same time the allocation and exchange of quotas are matters of an ongoing moral debate this debate i suggest reflects the politics of independence and equity in icelandic history as well as a deeper concern in western society with the status of money and monetary exchange a concern that has a number of parallels in other parts of the world

the pitch rather than the pit investor inattention trading activity and fifa world cup matches this paper analyzes stock market trading in 15 countries during the 2010 and 2014 soccer fifa world cups we find evidence for substantial investor inattention during these major sporting events the lack of attention for the trading pit is particularly large when the national soccer team is competing with traded volumes declining by as much as 48 during national team matches prices on local stock markets can temporarily decouple from global financial market developments these findings suggest that major sporting events can act as a laboratory in which to investigate investor inattention

the tradable permits approach to protecting the commons lessons for climate change tradable permit approaches for rationing access to the commons have been applied to many different types of resources in many different countries this essay reviews the experience with three main applications of tradable permit systems air pollution control water supply and fisheries management as well as some unique related programmes the purpose of the review is to draw together what we have learned about tradable permits in practice that might offer some useful insights for the implementation of the three tradable permit mechanisms that are part of the kyoto protocol copyright 2003 oxford university press

internet based virtual stock markets for business forecasting the application of internet based virtual stock markets vsms is an additional approach that can be used to predict short and medium term market developments the basic concept involves bringing a group of participants together via the internet and allowing them to trade shares of virtual stocks these stocks represent a bet on the outcome of future market situations and their value depends on the realization of these market situations in this process a vsm elicits and aggregates the assessments of its participants concerning future market developments the aim of this article is to evaluate the potential use and the different design possibilities as well as the forecast accuracy and performance of vsms compared to expert predictions for their application to business forecasting after introducing the basic idea of using vsms for business forecasting we discuss the different design possibilities for such vsms in three real world applications we analyze the feasibility and forecast accuracy of vsms compare the performance of vsms to expert predictions and propose a new validity test for vsm forecasts finally we draw conclusions and provide suggestions for future research

a test for speculative bubbles in the sterling dollar exchange rate 1981 84 the u s dollar price of the u k pound sterling is tested for a speculative bubble defined as a period with a nonzero median in excessreturns a nonparametric procedure is developed which controls for data mining over the period of flexible exchange rates and finds a negative bubble in the excess return to holding sterling rather than dollar assets during the period 1981 84 possible interpretations arebootstrap equilibria rational bubbles nonsym metric fundamentals and nonrational expectations copyright 1986 by american economic association

information processing constraints and asset mispricing i analyse a series of natural quasi experiments centred on betting exchange data on the wimbledon tennis championships to determine whether information processing constraints are partially responsible for mispricing in asset markets i find that the arrival of information during each match leads to substantial mispricing between two equivalent assets and that part of this mispricing can be attributed to differences in the frequency with which the two prices are updated inplay this suggests that information processing constraints force the periodic neglect of one of the assets thereby causing substantial albeit temporary mispricing in this simple asset market

the usury debate the sustainability debate and the call for a moral economy abstract this article attempts to contribute ethical to perspectives on sustainability initiatives by comparing the relationship between economy and society in the usury debate in early modern england and the sustainability debate in the late 20th century this comparison highlights is the changing relationship between economy and society has been a self conscious and hotly debated struggle among various groups at various times in history the article concludes that if sustainability is going to be a viable ethical project it may have to reclaim access to social and political relations which have been increasingly privatized in market economy throughout the modern period

estimates of the variance of u s inflation based upon the arch model it is generally agreed that the unpredictability of future inflation is a major component of the welfare loss associated with inflation perfectly predicted inflation might induce some costs through institutional rigidities governmental interference and transaction costs but in the long run these should be rather minimal as these institutions adopt various forms of indexing when inflation is unpredictable risk averse economic agents will incur a loss even if prices and quantities are perfectly flexible in all markets inflation is a measure of the relative price of goods today and goods tomorrow thus uncertainty in tomorrow s price impairs the efficiency of today s allocation decisions friedman in his nobel lecture 8 argues convincingly that higher variability of inflation would lead to decreased output ceteris paribus he then conjectures that higher rates of inflation are generally associated with higher variability of inflation and presumably greater uncertainty about future rates if this is true then higher rates of inflation would also be associated with low levels of output which implies a positively sloped phillips curve this paper uses a new statistical technique arch to estimate the conditional mean and variance of inflation from u s time series data the main finding is that the variance of inflation in the seventies was only slightly greater than in the sixties

conditional variance and the risk premium in the foreign exchange market abstract we investigate the existence of a risk premium in the foreign exchange market based on the conditional variance of market forecast errors the forecast errors are assumed to follow the arch process introduced by engle 1982 estimation and diagnostic testing of the model are discussed and results are presented for the currencies of the united kingdom france germany japan and switzerland