causes of the forward bias non rational expectations versus risk premia the sources of the systematic forward bias in the foreign exchange market are sought a theoretical framework based on some well known international parity conditions is developed in order to derive testable hypotheses these are a only risk premia account for the observed deviations between forward and future sport rate c anticipated real exchange rate changes explain part of the bias the provided evidence is not consistent with any of these hypotheses which in turn implies that part of the bias may be due to non rational expectations

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

testing the unbiasedness hypothesis in the forward foreign exchange market a specification analysis abstract this paper evaluates two popular regression methods of testing the unbiasedness hypothesis in the forward foreign exchange market for the 30 day canada united states forward foreign exchange market the evidence overwhelmingly indicates that it is inappropriate to treat the structure of the systematic and stochastic components of the test relations as constant over time hence conclusions inferred from parameter significance testing based upon full sample estimation can be very misleading accordingly we argue for a specification analysis of the test relations and more explicit modelling of market fundamentals

are experts expectations rational a multicurrency analysis is the exchange rate expectation formation process rational this age old question is looked at with survey data on exchange rate expectations at multiple forecast horizons this helps to circumvent the risk premium issue and isolate the exchange rate expectational rationality factor the econometric procedure used is the phillips hansen fully modified ordinary least squares test this allows one to conduct an unrestricted cointegration analysis and also differentiate between strong and weak forms of rationality to do this separate tests are made of the bivariate two currencies and the multivariate multicurrency systems approach rationality in the exchange rate expectation formation process is not upheld in either the weak or strong form test at any forecast horizon

rational expectations as long run equilibria tests for indian securities abstract it is recommended that the standard bias test for muth rational expectations should be augmented in the form of a dynamic model amongst other advantages this approach permits the researcher to test unbiasedness as a long run equilibrium of the underlying dynamic adjustment process relating expectations to realizations the approach is applied to a new data set on traders expectations in the madras stock exchange although bias is generally found in the short run the long run equilibrium is consistent with rational expectations in about half the cases studied significant steady state biases are indicated for the remainder

testing the efficiency of the canadian u s exchange market under the assumption of no risk premium the efficiency of the canadian u s exchange market for the current float is examined more extensively than previously semi strong form tests which admit the lagged spot rate as a predictor are considered in addition to the standard weak form test these stronger tests reject the joint null hypothesis of an efficient exchange market and no risk premium for the period ending in october 1976 although not for the entire period for almost every year the current spot rate provided a better forecast of the future spot rate than did the current forward rate there is now an extensive empirical literature on testing the efficiency of various foreign exchange markets see 16 for a survey yet almost all of these tests are weak form tests or tests of the bias of the forward exchange rate as a predictor of the future spot rate such tests in the canadian u s exchange market can be found in the work of porter 20 eastman 5 kaserman 10 kohihagen 11 cornell 3 and levich 14 for the canadian float of the 1950s porter 20 and kaserman 10 found that one could not reject the unbiasedness of the forward rate eastman 5 and kohlhagen 11 rejected the unbiasedness of the forward rate for the floating period although not for the subsequent fixed period but their use of overlapping contracts means that their standard errors are biased cornell 3 and levich 14 found that in terms of the root meansquared error criterion the lagged spot rate and the lagged forward rate predicted the current spot rate equally well for more recent periods this paper examines the efficiency of the canadian u s exchange market for the current float july 1970 to december 1978 in a more extensive way than it has been previously examined from the weak form test the paper proceeds to two semi strong form tests which admit the lagged spot rate as a possible predictor throughout the paper various subperiods are considered in addition to the period as a whole

relative factor endowments and international portfolio choice we present a model of international portfolio choice based on cross country differences in relative factor abundance countries have varying degrees of similarity in their factor endowment ratios and are subject to aggregate productivity shocks risk averse consumers can insure against these shocks by investing their wealth at home and abroad in a many good setup the change in factor prices after a positive shock in a particular country provides insurance to countries that have dissimilar factor endowment ratios but is bad news for countries with similar factor endowment ratios since their incomes will worsen therefore countries with similar relative factor endowments have a stronger incentive to invest in one another for insurance purposes than countries with dissimilar endowments the importance of this effect depends on the size of countries empirical evidence linking bilateral international equity investment positions to a proxy for relative factor endowments supports our theory the similarity of host and source countries in their relative capital labor ratios has a positive effect on the source country s investment position in the host country the effect of similarity is enhanced by the size of host countries

international investment positions a cross sectional analysis abstract we explore some empirical properties of the level and composition of gross international investment positions in a cross section of countries we find that more open countries with larger domestic financial markets tend to hold greater quantities of foreign assets and liabilities there is some evidence that cross holdings are positively correlated with inflation volatility but negatively correlated with terms of trade volatility

the effect of errors in variables on tests for a risk premium in forward exchange rates conventional tests for a risk premium in the price of forward exchange use the subsequently realized spot rate as a proxy for prior expectations use of this proxy creates a serious errors in variables problem which makes it difficult to reject the null hypothesis of zero risk premium use of a better proxy for expectations indicates the presence of a risk premium in the forward exchange rate of all countries analyzed if there is zero risk premium in the price of forward exchange the forward rate will equal agents expectations of the future spot rate since the expected future spot rate is not observed investigators have had to construct an expectations proxy in order to test for a risk premium the standard approach has been to use the subsequently realized spot rate as a proxy for prior expectations this approach is justified by invoking the theory of rational expectations if agents efficiently process all information then the realized spot rate will differ from prior expectations by a zero mean serially uncorrelated random variable given this expectations proxy the presence of a risk premium is tested by regressing the future realized spot rate on the forward rate intercept and slope regression coefficients which are not significantly different from zero and unity respectively imply a zero risk premium such tests have generally been unable to reject the hypothesis of zero risk premium 1 it is the contention of this paper that the subsequently realized spot rate is a poor proxy for the prior expectations of rational agents use of this proxy creates a serious errors in variables problem in tests for a risk premium and this makes it difficult to reject the null hypothesis when a better proxy for expectations is employed we find evidence of a risk premium in the price of forward exchange as a result the forward rate uncorrected for the risk premium does not provide unbiased market implicit forecasts of the future spot rate 2

value of time speeding behavior and gasoline prices abstract value of time vot is a key parameter in economics and policy this paper presents an alternative method to estimate vot by analyzing an hourly dataset on drivers speeding behavior as a function of the gasoline price our identification strategy is novel as it is based on the intensive margin in comparison previous studies reveal vot on the extensive margin but choice alternatives have multiple attributes thereby potentially confounding estimates consistent with the range of the prior literature we find a vot of about 50 of the wage rate and analyze sources of bias from accidents and traffic tickets these bias functions suggest that previous stated preference vot estimates are likely downward whereas previous revealed preference estimates are likely upward biased

international capital mobility net versus gross stocks and flows abstract feldstein and horioka 1980 observed that net capital flows have been small in relation to domestic saving and investment flows for oecd countries in the post war period which they interpreted as evidence of low capital mobility this paper argues that the correlation between gross domestic and international financial flows can be a better indicator of capital mobilitythan net capital flows contrary to the conventional wisdom among international economists gross flows have been small in relation to gross domestic asset creation for oecd countries although by this measure the degree of capital mobility increased in the 1980s

predictability in financial markets what do survey expectations tell us abstract there is widespread evidence of excess return predictability in financial markets for the foreign exchange market a number of studies have documented that the predictability of excess returns is closely related to the predictability of expectational errors of excess returns in this paper we investigate the link between the predictability of excess returns and expectational errors in a much broader set of financial markets using data on survey expectations of market participants in the stock market the foreign exchange market the bond market and money markets in various countries the results are striking first in markets where there is significant excess return predictability expectational errors of excess returns are predictable as well with the same sign and often even with similar magnitude this is the case for foreign exchange stock and bond markets second in the only market where excess returns are generally not predictable the money market expectational errors are not predictable either these findings suggest that an explanation for the predictability of excess returns must be closely linked to an explanation for the predictability of expectational errors

simple monetary policy rules and exchange rate uncertainty abstract we analyze the performance and robustness of some common simple rules for monetary policy in a new keynesian open economy model under different assumptions about the exchange rate model adding the exchange rate to an optimized taylor rule that responds to cpi inflation gives only small improvements in terms of economic stability in most model configurations the taylor rule is also slightly more robust to uncertainty about the exchange rate model than are rules that respond to the rate of exchange rate depreciation our results thus indicate that the taylor rule is sufficient to stabilize a small open economy also under exchange rate model uncertainty

exchange rate variability and asset trade in popular discussion about the merits of different international monetary arrangements it is often maintained that increased exchange rate variability has a negative influence on international tra

a note on exchange rate expectations and nominal interest differentials a test of the fisher hypothesis this note tests the hypothesis that nominal interest differentials between similar assets denominated in different currencies can be explained entirely by the expected change in the exchange rate over the holding period this proposition often called the fisher open hypothesis or the hypothesis of perfect asset substitutability has been a major component of recent theories of exchange rate determination and has important implications for monetary policy 1 the fisher hypothesis differs from the covered interest parity theorem enunciated by keynes 11 while covered interest parity equates the nominal interest differential between financial centers to a known premium or discount on forward foreign exchange and is thus in principle riskless fisher parity involves risk in an essential way the two conditions are equivalent only when forward exchange rates equal expected future spot rates recent theoretical work for example that of grauer litzenberger and stehle 8 kouri 12 and frankel 6 shows that this need not be the case when market participants are risk averse thus while covered interest parity must always hold exactly in an informationally efficient asset market with no transactions costs fisher parity need not nominal interest differentials may reflect risk premia in addition to expected exchange rate movements 2 it should be emphasized at the outset that the tests conducted in this paper are really joint tests of the fisher hypothesis and a weak form of foreign exchange market informational efficiency levich 14 has argued that tests of market efficiency are always joint tests involving some hypothesized structure of normal equilibrium returns below we assume informational efficiency and instead test fisher s hypothesized arbitrage condition that nominal interest differentials equal expected percentage changes in exchange rates

an intertemporal model of international capital market segmentation this paper develops an intertemporal model of international capital market segmentation within the model under various forms of segmentation integration the equilibrium asset prices and allocations the risk free interest rate and the intertemporal consumption behavior and welfares of two countries are derived and compared it is shown that the equilibrium interest rate is increased on integration and that integrating markets may be significantly welfare decreasing for one of the countries conditions that may lead to a decrease in welfare are investigated the conclusions as to the effects of segmentation on asset prices in the mean variance model of the existing finance segmentation literature are also shown to break down in an intertemporal model

the unbiased forward rate hypothesis re examined abstract this paper examines the unbiased forward rate hypothesis using an error correction model ecm previous tests have utilized mainly two specifications differences and levels the advantage of the ecm is that the parameters of the level specification appear in the error correction term and hence the ecm provides a direct link to the levels specification in this paper we fully exploit this link and demonstrate that both specifications yield essentially the same results when the ecm is explicitly derived from a levels specification and the levels parameters are estimated simultaneously with other parameters of the ecm

how reliable are hog futures as forecasts the chicago mercantile exchange hog futures contract was revamped in 1997 and it is one of the largest futures markets for a nonstorable commodity the literature is divided on whether or not futures prices for nonstorables provide reliable forecasts of cash prices we find that from 1998 to 2004 the hog futures market was an unbiased predictor of cash prices copyright 2008 oxford university press

using survey data to test standard propositions regarding exchange rate expectations survey data provide a measure of exchange rate expectations superior to the forward rate in that no risk premium interferes we estimate extrapolative adaptive and regressive models of expectations static or random walk expectations and bandwagon expectations are rejected current appreciation generates the expectation of future depreciation because variables other than the contemporaneous spot rate receive weight in comparing expectations to the process governing the spot rate we find statistically significant bias no variable is as ubiquitous in international financial theory and yet as elusive empirically as investors expectations regarding exchange rates in the past expectations have been modeled in an ad hoc way often by using the forward exchange rate there is however a serious problem with using the forward discount as the measure of the expected change in the exchange rate in that the two may not be equal the gap that may separate the forward discount and expected depreciation is generally interpreted as a risk premium most of the large empirical literature testing the unbiasedness of the forward exchange rate for example has found it necessary either arbitrarily to assume away the existence of the risk premium if the aim

trading strategies with implied forward credit default swap spreads credit default risk for an obligor can be hedged with either a credit default swap cds or a constant maturity credit default swap cmcds we find strong evidence of persistent differences in the hedging cost associated with the two comparable contracts between 2001 and 2006 it would have been more profitable to sell cds and buy cmcds while after the crisis between 2008 and 2013 the opposite strategy was profitable panel data tests indicate that for our sample period the implied forward cds rates are unbiased estimates of future spot cds rates the changes in the company implied volatility is the main determinant of trading inefficiencies followed by the changes in gdp and in the interest rates before the crisis and the changes in sentiment index and in the vix after the crisis

explaining the absence of international factor price convergence abstract as capital markets have become integrated factor prices have not converged as expected this paper provides an explanation the key observation is that non specific output risks are borne by capital making international portfolio diversification a dominant strategy capital market integration can elicit many patterns of factor price response under this circumstance factor prices will move in parallel if countries are identical when countries differ factor prices may diverge or even have their relative sizes reversed the integration of capital markets affects welfare through changes in risk and in overall returns to savings welfare need not improve

integration cointegration and the forecast consistency of structural exchange rate models abstract we propose an alternative set of criteria for evaluating forecast rationality the forecast and the actual series 1 have the same order of integration 2 are cointegrated and 3 have a cointegrating vector consistent with long run unitary elasticity of expectations we denote forecasts that meet these criteria as consistent forecasts generated from monetary models generally pass 1 however using the johansen procedure cointegration fails to hold the longer the horizon of the cointegrated pairs 3 is not generally rejected using the horvath watson procedure imposing the unitary coefficient restriction we find fewer instances of consistency although a higher proportion of the cases of consistency are found at the longer horizons

the carry trade and fundamentals nothing to fear but feer itself the carry trade is the investment strategy of going long in high yield target currencies and short in low yield funding currencies recently this nave trade has seen very high returns for long periods followed by large crash losses after large depreciations of the target currencies based on low sharpe ratios and negative skew these trades could appear unattractive even when diversied across many currencies but more sophisticated conditional trading strategies exhibit more favorable payos we apply novel within economics binary outcome classication tests to show that our directional trading forecasts are informa tive and out of sample loss function analysis to examine trading performance the critical conditioning variable we argue is the fundamental equilibrium exchange rate feer expected returns are lower all else equal when the target currency is overvalued like traders researchers should incorporate this information when evaluating trading strategies when we do so some questions are resolved negative skewness is purged and market volatility vix is uncorrelated with returns other puzzles remain the more sophisticated strategy has a very high sharpe ratio suggesting market ineciency

the determinants of cross border equity flows abstract we explore a new panel data set on bilateral gross cross border equity flows between 14 countries 1989 1996 we show that a gravity model explains international transactions in financial assets at least as well as goods trade transactions gross transaction flows depend on market size in source and destination country as well as trading costs in which both information and the transaction technology play a role distance proxies some information costs and other variables explicitly represent information transmission an information asymmetry between domestic and foreign investors and the efficiency of transactions the geography of information is the main determinant of the pattern of international transactions while there is weak support in our data for the diversification motive once we control for the informational friction we broaden the scope of our results by presenting some evidence linking the results on equity transactions to equity holdings

cointegration and forward and spot exchange rate regressions abstract we investigate the relationship between cointegration models of the current spot exchange rate s t and the current forward rate f t and cointegration models of the future spot rate s t 1 and f t and the implications of this relationship for tests of the forward rate unbiasedness hypothesis fruh we show that simple models of cointegration between s t and f t imply complicated models of cointegration between s t 1 and f t consequently standard methods are often inappropriate for modeling the cointegrated behavior of s t 1 f t and we show that the use of such methods can lead to erroneous inferences regarding the fruh

international interest rate linkages and the exchange rate regime abstract return differentials between instruments denominated in canadian dollars and instruments denominated in american dollars are investigated the study compares the properties of return differentials in the period of fixed exchange rates during the 1960s and in the period of flexible exchange rates during the 1970s and 1980s both real and nominal return differentials are investigated the results indicate that the change in exchange rate regime is not associated with a change in the average level of ex post return differentials between canada and the united states models which predict ex ante return differentials from available information in a rational expectations framework show a surprisingly large amount of structural stability across the regime change the major impact of the flexible exchange rate regime is on the variance of ex post return differentials and not on the average level of ex post or ex ante return differentials jel e42 e58 g15

exchange rate expectations and functional misspecification the authors employ the cooley prescott adaptive model to examine for functional misspecification in three commonly used exchange rate expectation models they also test for heterogeneity among forecasts the authors find no serious misspecification problem but some heterogeneity in expectations these test results are confirmed by various other regression specification tests copyright 1994 by mit press

does britain or the united states have the right gasoline tax this paper develops an analytical framework to assess the second best optimal level of gasoline taxation taking into account unpriced pollution congestion and accident externalities as well as interactions with the broader fiscal system we provide calculations of the optimal taxes for the us and the uk under a variety of parameter scenarios under our central parameter values the second best optimal gasoline tax is 1 01 gal for the us and 1 34 gal for the uk current tax rates are much lower than this in the us and higher in the uk the calculations are moderately sensitive to alternative parameter assumptions the congestion externality is the largest component in both nations revenue raising needs also play a significant role as do accident externalities and local air pollution potential welfare gains from reducing the current uk tax rate are estimated at nearly one fourth the production cost of all gasoline used in the uk even larger gains could be achieved by switching to a tax on vehicle miles with equal revenue yield for the us the welfare gains from optimizing the gasoline tax are smaller but those from switching to an optimal tax on vehicle miles are very large

lm cointegration tests allowing for an unknown number of breaks implications for the forward rate unbiasedness hypothesis abstractthis article extends the lagrange multiplier lm cointegration test proposed by westerlund and edgerton we 2007 by allowing for an unknown number of breaks monte carlo simulations provide two main results first a loss of power in the lm cointegration tests is detected when potential multiple breaks are ignored second the modified testing procedures do not affect the asymptotic distribution and major properties of the tests of we under the null but noticeably increase their testing power in presence of multiple breaks we also provide empirical applications of the proposed tests for the forward rate unbiasedness hypothesis fruh the results reveal that the fruh does hold when the effects of the multiple structural breaks are taken into account

should congested cities reduce their speed limits evidence from sao paulo brazil abstract road accidents are the leading cause of unnatural deaths worldwide cities are experimenting with more stringent speed limits in an effort to reduce them the impacts of these policies are unclear in many developing country cities where a disproportionate share of accident damages occur but also where speed regulations could exacerbate already high levels of congestion we evaluate a speed limit reduction program in sao paulo brazil using a dynamic event study design and measurements of 125 thousand traffic accidents 38 million traffic tickets issued by monitoring cameras and 1 4 million repeat observations of real time trip durations before and after a regulatory change we find that the program resulted in 1889 averted accidents within the first 18 months and reduced accidents by 21 7 on treated roads with larger effects on roads with camera based enforcement the program also affected travel times on treated roads 5 5 though the social benefits from reduced accidents are at least 1 32 times larger than the social costs of longer trip times the benefits of accident reductions accrue largely to lower income pedestrians and motorcyclists indicating that speed limit reductions may have important impacts on low income residents in developing country cities

on the consistency of short run and long run exchange rate expectations abstract this paper examines whether short term exchange rate expectations overreact by comparing them with long term expectations we develop a set of nonlinear restrictions linking expectations at different forecast horizons the restrictions impose consistency a property weaker than rationality we use exchange rate survey data to measure expectations and then test whether consistency holds the data show that a current positive exchange rate shock leads investors to expect a higher long run future spot rate when iterating forward their short term expectations than when thinking directly about the long run in this sense short horizon expectations may overreact to current exchange rate changes

portfolio and welfare consequences of debt market dominance the ability to issue debt that pays in units of the domestic good leads a country to accumulate a large and negative net foreign asset position while maintaining a positive position in equity this debt market advantage also helps to explain the weak relationship between the real exchange rate and relative consumption our stylized model matches the key facts about the u s international portfolio the u s real exchange rate and explains nearly 50 of the observed variation in the valuation effects we find that taxing bond market transactions increases the volatility of the exchange rate capital flows and allocations in contrast taxing equity positions stabilizes the exchange rate and capital flows while having little impact on the allocation lastly the paper describes a global solution method for portfolio problems under incomplete markets

market efficiency and cointegration an application to the sterling and deutschemark exchange markets abstract the assumption that the foreign exchange market is efficient that is that agents are risk neutral and use all available information rationally so that the forward exchange rate is an unbiased predictor of the future spot rate is a property often imposed in theoretical international macroeconomic models although a vast empirical literature has evolved to test market efficiency we use recent developments in the theory of cointegration to provide new methods of testing several aspects of foreign exchange market efficiency we ffind evidence inconsistent with market efficiency for both germany and the united kingdom

on the internal consistency of short term medium term and long term oil price forecasts we derive internal consistency restrictions on short medium and long term oil price forecasts we then analyse whether oil price forecasts extracted from the survey of professional forecasters spf conducted by the european central bank ecb satisfy these internal consistency restrictions we find that neither short term forecasts are consistent with medium term forecasts nor that medium term forecasts are consistent with long term forecasts using a more complex expectation formation structure featuring a distributed lag structure however we find stronger evidence of internal consistency of medium term forecasts with long term forecasts

are foreign exchange forecasts rational an empirical note abstract this paper uses survey data drawn from a high inflation economy israel to directly test the rationality of foreign exchange forecasts the empirical evidence indicates that exchange rate expectations are not rational in the muthian sense

volume volatility and the dispersion of beliefs i examine a two period noisy rational expectations model of a futures market and show that the dispersion of expectations about a weighted average of future prices measures both the additional volatility and the additional expected volume of trade associated with noisy information the role played by dispersion helps clarify several stylized facts concerning volume and price behavior specifically dispersion can be a factor contributing to the positive correlation between volume and absolute price changes and the positive correlation between consecutive absolute price changes article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

liquidity capital controls and exchange rates abstract we present a two country extension of lucas 1990 work on how cash in advance constraints in asset markets affect the pricing of financial assets in the model there is some degree of separation between the goods markets and the asset markets and money is used for transactions in both markets the main results of the paper are the following first the equilibrium level of the exchange rate depends on the share of money used for asset transactions a greater share corresponds to a more appreciated currency second capital controls in the form of taxes on foreign asset acquisitions tend to appreciate the exchange rate third the maturity structure of the public debt affects the equilibrium exchange rate in particular a move towards a longer maturity structure will tend to depreciate the exchange rate jel 31

expectation formation in the foreign exchange market a time varying heterogeneity approach using survey data using consensus economics survey data on jpy usd and gbp usd exchange rate expectations for the 3 and 12 month horizons over the period november 1989 december 2012 we first show that expectations fail the conventional tests of unbiasedness and do not exhibit a learning process towards rationality our approach is consistent with the economically rational expectations theory feige and pearce 1976 which states that information costs and agents aversion to misestimating future exchange rates determine the optimal amounts of information on which they base their expectations the time variability of the cost aversion ratios justifies at the aggregate level a representation of expectations as a linear combination of the traditional extrapolative adaptive and regressive processes augmented by a forward market component whose parameters are allowed to change over time this mixed expectation model with unstable heterogeneity is validated by our kalman filter estimation results for the two currencies and

tests of rational expectations and no risk premium in forward exchange markets abstract this paper tests the simple efficiency hypothesis i e that traders have rational expectations and charge no risk premium in the forward exchange market it uses a statistical procedure which is consistent under a large class of heteroscedasticity and a set of data which takes into account the institutional features of the forward exchange market the results show that this procedure leads to stronger rejections of the simple efficiency hypothesis than do procedures using the standard assumption of homoscedasticity

inefficiency of foreign exchange markets and expectations survey evidence in recent years the finding of a bias has cast doubts on the efficiency of the forward exchange market a large survey of exchange rate expectations in the danish market shows that this inefficiency is mainly due to risk aversion in the market the results contradict the findings of surveys of us and uk forward exchange markets where contribution from biased expectations has been large

testing the rationality of exchange rate and interest rate expectations an empirical study of australian survey based expectations this paper examines the rationality of the australian survey based expectations 1 and 4 week ahead us a exchange rate and 2 and 4 week ahead australian 90 day bank bill and 10 year bond rates the actual and expected variables are found to be cointegrated indicating that the expected future values and the future realizations of the exchange rate and interest rates have long run equilibrium relationships ols estimations with the newey west corrections are employed for testing the unbiased expectations hypothesis ueh where the frequency of the expectations data is finer than the forecast horizons and the exponential garch models that take into account the time varying nature of the forecasterror variance are employed for testing the weak rational expectations hypothesis wreh the evidence shows that the wreh could not be rejected in any case except for the two week ahead forecast of the 90 day interest rate which indicates that all available information is used at the time of forming relevant

differential interpretation of information in inflation forecasts we test the hypothesis associated with a standard assumption in the theoretical literature on learning that economic agents interpret information identically we use a data set based on a survey o

financial intermediation international risk sharing and reserve currencies abstract i model the equilibrium risk sharing between countries with varying financial development the most financially developed country takes greater risks because its financial intermediaries deal with funding problems better in good times the more financially developed country consumes more and runs a trade deficit financed by the higher financial income that it earns as compensation for taking greater risk during global crises it suffers heavier losses its currency emerges as the reserve currency because it appreciates during crises thus providing a good hedge i provide evidence that financial net worth plays a crucial role in understanding this asymmetric risk sharing jel e44 f14 f32 g01 g15 g21

unbiasedness and time varying risk premia in the crude oil futures market abstract this paper presents some empirical evidence on market efficiency and unbiasedness in the crude oil futures market and some related issues on the basis of monthly observations on spot and futures prices of the west texas intermediate wti crude oil several tests are carried out on the relevant hypotheses the evidence suggests that futures prices are neither unbiased nor efficient forecasters of spot prices furthermore a garch m 1 1 model reveals the existence of a time varying risk premium

are foreign exchange forecasts rational new evidence from survey data abstract tests of rationality in foreign exchange markets have been inconclusive because of disagreement over the relevant asset pricing model this paper uses a newly available set of data on foreign exchange expectations to directly test the rationality of four foreign currency markets overall the results reject the rational expectations hypothesis

rationality of survey data and tests for market efficiency in the foreign exchange markets abstract this paper tests the rational expectations hypothesis reh and the market efficiency hypothesis meh in the foreign exchange markets using survey data on expectations our results show that the spot exchange rates expected exchange rates and the forward rates all follow a random walk process hence the cointegration theory is employed to test the reh and meh all the test statistics support the reh but fail to support the meh we use survey data on expectations to identify the causes behind this failure of the meh jel f31 g14

using mandated speed limits to measure the value of a statistical life in 1987 the federal government permitted states to raise the speed limit on their rural interstate roads but not on their urban interstate roads from 55 mph to 65 mph since the states that adopted the higher speed limit must have valued the travel hours they saved more than the fatalities incurred this institutional change provides an opportunity to estimate an upper bound on the public s willingness to trade off wealth for a change in the probability of death our estimates indicate that the adoption of the 65 mph limit increased speeds by approximately 4 percent or 2 5 mph and fatality rates by roughly 35 percent together the estimates suggest that about 125 000 hours were saved per lost life when the time saved is valued at the average hourly wage the estimates imply that adopting states were willing to accept risks that resulted in a savings of 1 54 million 1997 dollars per fatality with a sampling error roughly one third this value we set out a simple model of states decisions to adop

foreign exchange rate expectations micro survey data this paper analyzes the panel data of biweekly surveys on the yen dollar exchange rate expectations of forty four institutions for two years and contains four major findings first market participants are heterogeneous that is significant individual effects exist in their expectation formation second the individual effects have a characteristic of wishful expectations exporters expect yen depreciation and importers expect yen appreciation relative to others third many violate the rational expectations hypothesis fourth forecasts with long horizons show less yen appreciation than those with short horizons cross equation constraints implied by the consistency of the forecast term structure are strongly rejected in the data copyright 1990 by american economic association

a re examination of the unbiased forward rate hypothesis in the presence of multiple unknown structural breaks we test the unbiased forward rate ufr hypothesis using new tests for cointegration developed by hatemi j 2008a that allows for multiple unknown structural breaks we analyse the australian dollar aud euro eur british pound gbp and japanese yen jpy versus the us dollar usd spot rates and forward rates relationship during the period 5 january 1999 to 28 december 2006 we find that the ufr does hold when the effects of the unknown structural breaks are taken into account the parameters that we obtained were close to unity hence taking into account transaction cost and the existence of a risk premium earning arbitrage profits may still not be possible thus the markets for these currencies may still be considered as efficient

what is the optimal speed limit on freeways abstract when choosing his speed a driver faces a trade off between private benefits time savings and private costs fuel cost and own damage and injury driving faster also has external costs pollution adverse health impacts and injury to other drivers this paper uses large scale speed limit increases in the western united states in 1987 and 1996 to address three related questions first do the social benefits of raising speed limits exceed the social costs second do the private benefits of driving faster exceed the private costs third what is the optimal speed limit i find that a 10 mph speed limit increase on highways leads to a 3 4 mph increase in travel speed 9 15 more accidents 34 60 more fatal accidents and elevated pollutant concentrations of 14 24 carbon monoxide 8 15 nitrogen oxides 1 11 ozone and 9 higher fetal death rates around the affected freeways using these estimates i find that the social costs of speed limit increases are two to seven times larger than the social benefits in contrast many individual drivers would enjoy a net private benefit from driving faster privately a value of a statistical life vsl of 6 0 million or less justifies driving faster but the social planner s vsl could be at most 0 9 2 0 million to justify higher speed limits i conclude that the optimal speed limit was lower but not much lower than 55 mph

patterns in exchange rate forecasts for twenty five currencies the properties of exchange rate forecasts are investigated with a data set encompassing a broad cross section of currencies over the entire sample expectations appear to be biased this result is robust to the possibility of random measurement error in the survey measures there appear to be statistically significant differences in the degree of bias in subgroupings of the data the bias is lower for the high inflation countries the bias is greater for the major currencies studied in earlier papers and the bias is also greater for the ems currencies copyright 1994 by ohio state university press

further evidence on exchange rate expectations abstract this paper considers a previously unexploited survey data set of exchange rate expectations which allows us to focus on differences between ems and dollar exchange rates we corroborate the earlier finding in the literature that exchange rate forecasts are not rational and that agents do not use all available information efficiently although extrapolative and adaptive expectations formation mechanisms describe non ems exchange rate expectations to a certain extent ems exchange rates forecasts seem to follow long run fundamentals more closely and would suggest that agents believe that ems exchange rate expectations undershoot their long run equilibrium values jel f31

on the restricted cointegration test as a test of the rational expectations hypothesis one of the main consequences of the cointegration revolution on the domain of the direct tests of the rational expectations hypothesis reh was the substitution of the restricted cointegration test rct for the unbiasedness test however the results of a monte carlo study show that a simple t test can be much more powerful than the rct it is argued that the rct is adequate to investigate the asymptotic rationality but that it is not sufficient to assess the muthian rationality of expectations the discussion is empirically illustrated with the test of the reh for the portuguese retail trade inflation expectations

does foreign exchange intervention matter the portfolio effect until recently there was an unusual degree of consensus among economists that intervention by central banks in the foreign exchange market did not offer an effective or lasting instrument for affecting the exchange rate at least not independently of monetary policy this consensus was largely shared among policymakers and participants in the financial markets as well the 1982 g 7 economic summit at versailles commissioned a study of intervention known as the jurgenson report which found that the effects were small and transitory at most we think that the time is ripe for new statistical testing of the question many policymakers and foreign exchange traders believe that the intervention operations that have taken place since the plaza agreement of september 1985 have had an effect especially when operations are coordinated moreover the theoretical case against the effectiveness of intervention is not as clear as a reading of the economics literature might suggest the academic literature is predicated on the distinction between intervention operations that are sterilized and those that are allowed to affect the money supply we study the intervention operations that actually took place between 1982 and 1988 regardless of whether they were sterilized however we do begin in section i with a review of the issues involved 2 there are two possible channels through which intervention whether sterilized or not can influence the foreign exchange rate the portfolio and the expectations channels intervention can even if sterilized influence exchange rates through the portfolio channel provided foreign and domestic bonds are considered imperfect substitutes in investors portfolios intervention operations that for example increase the current relative supply of mark to dollar assets which private investors are obliged to accept into their portfolios will force a decrease in the relative price of mark assets 3 intervention can also influence exchange rates regardless of whether foreign and domestic bonds are imperfect substitutes through the expectations channel the public information that central banks are intervening in support of a currency or are planning to intervene in the future may under certain conditions cause speculators to expect an increase in the price of that currency in the future speculators react to this information by buying the currency today bringing about the change in the exchange rate today in sections ii and iii we describe the econometric problems that arise in the standard portfolio balance estimation equation we derive an alternative portfolio balance dominguez kennedy school of government harvard university 79 j f kennedy street cambridge ma 02138 frankel department of economics university of california 787 evans hall berkeley ca 94720 we thank three anonymous referees for valuable comments and suggestions julia marsh and julia lowell for research assistance and franz scholl at the bundesbank jean pierre roth at the swiss national bank and officials at the u s treasury and the board of governors of the federal reserve system for making the daily intervention data available 1many of the econometric results finding little or no effect were reported in kenneth s rogoff 1984 and dale w henderson and stephanie sampson 1983 2for authoritative statements see henderson 1984 or maurice obstfeld 1990 3the exchange rate reaction to an increase in the relative supply of outside foreign assets may be reduced if there is an increase in their expected rate of return that induces a corresponding increase in demand

trade in nominal assets monetary policy and price level and exchange rate risk in a previous paper trade in risky assets i have analyzed the pattern of international trade in risky real assets between barter economies relying on the law of comparative advantage and using autarky asset price differences to predict the pattern of asset trade in this paper the analysis is extended to international trade in nominal assets assets with returns paid in currencies between monetary economies the risk chracteristics of real returns on nominal assets depend on price level and exchange rate risk and therefore on monetary policy it is examined how different combinations of monetary policies and exchange rate regimes affect nominal assets return risk characteristics their autarky perices and hence their trade pattern when countries differ with respect to their outputs or their attitudes towards risk when world asset markets are incomplete different monetary policies and exchange rate regimes have dramatic effects on risk characteristics of home and foreign currency bonds and on the trade pattern in these assets as well as on aggregate capital and current accounts

consistency of short term and long term expectations abstract this paper provides an alternative derivation of the cross equation restrictions obtained by froot and ito in this issue for the purpose of testing the consistency of short term and long term expectations the derivation offered here is more generally applicable and yields restrictions that are much simpler to deal with in practice

endogenous trade policy and the gains from international financial markets abstract this paper examines the interaction between international financial markets and trade policy when trade policy is endogenous there is a secondary gain from opening up financial markets in addition to the direct risk sharing benefits by breaking the direct link between the terms of trade and welfare international portfolio diversification can allow for a lower level of trade protection in a tariff game between governments we apply the model to an estimation of the welfare gains from international financial markets our results show that these indirect trade gains from financial markets are likely to be much larger than the direct risk sharing gains in the tariff game with financial markets however there are multiple equilibria while one equilibrium allows for complete diversification and complete free trade there are other equilibria in which there is limited diversification and a high level of average protection

automobile externalities and policies this paper discusses the nature and magnitude of externalities associated with automobile use including local and global pollution oil dependence traffic congestion and traffic accidents it then discusses current federal policies affecting these externalities including fuel taxes fuel economy and emissions standards and alternative fuel policies summarizing insofar as possible the welfare effects of those policies finally we discuss emerging pricing policies including congestion tolls and insurance reform and summarize the appropriate combination of policies to address automobile externalities

an evaluation of survey exchange rate forecasts abstract a non parametric test of direction is employed to evaluate the survey forecasts provided by the money market services empirical results suggest that the forecasts are useful for predicting the direction of exchange rate changes the results are consistent with a weaker form of rationality than unbiasedness

equity and tradeoffs in a tax based incomes policy a tax based incomes policy tip is a tax incentive that tries to induce employers and or workers to reduce wage and or price increases it is intended as a complement to the basic anti inflation policy of gradual monetary deceleration and fiscal restraint its purpose is to reduce the capital stock and output loss that would otherwise accompany such a policy see my 1978 1979a articles this article is divided into two sections section i examines the capital stock and output loss under monetary deceleration that is uncomplemented by tip this loss is due primarily to wage growth inertia a central feature of modern capitalist economies such inertia provides not only the rationale for a tip on wage increases but also implies that special effort is required to assure that the design of a complete tip package is fair to labor section ii analyzes the tradeoffs confronting two alternative methods of making tip more equitable to labor profit and or price restraint insurance and a tip on price increases of the largest firms the original tip limited to wage increases at first glance is often perceived as unbalanced and inequitable this section tries to contribute to the development of a balanced equitable tip

trade in risky assets a theory of the international trade pattern in risky assets is developed by applying the law of comparative advantage to asset trade according to this l aw there is a tendency for a country to import assets that have rela tively high autarky prices it is examined how autarky prices are aff ected by international differences in stochastic properties of output endowments the rate of time preference the degree of risk aversion and subjective beliefs and how such differences predict overall ca pital account deficits or surpluses as well as the composition of the capital account into trade in specific risky assets copyright 1988 by american economic association

fiscal policies and the integrated world stock market abstract the paper develops a two country stochastic model of an integrated world stock market in order to address issues concerning the effects of tax and spending policies on savings asset portfolios and stock market valuations general conditions for government finance neutrality under uncertainty are derived and the characteristics of the international transmission of uncertain future spending policies are spelled out they are shown to depend precisely on a transfer problem criterion involving the government and the private sector propensities to spend in different states of nature and on the cross country correlations between shocks to productivity and public spending

common stochastic trends in a system of exchange rates univariate tests reveal strong evidence for the presence of a unit root in the univariate time series representation for seven daily spot and forward exchange rate series furthermore all seven spot and forward rates appear to be cointegrated that is the forward premiums are stationary and one common unit root or stochastic trend is detectable in the multivariate time series models for the seven spot and forward rates respectively this is consistent with the hypothesis that the seven exchange rates possess one longrun relationship and that the disequilibrium error around that relationship partly accounts for subsequent movements in the exchange rates a general consensus has emerged in recent years that many macroeconomic time series such as gnp consumption expenditures disposable income etc can be characterized by a stochastic trend model in particular nelson and plosser 22 described this property as one of being difference stationary so that the first difference of a time series is stationary an alternative trend stationary model where a stationary component is added to a deterministic trend term has generally been found to be less appropriate 1 similarly it has long been recognized that many financial time series such as foreign exchange rates are nonstationary e g in meese and singleton 21 the issue of nonstationary is not merely a statistical curiosity but has several important implications for the modeling of exchange rates for instance many models of exchange rate determination under rational expectations require stationarity assumptions when solving out the expected future values of the fundamentals further there has been some controversy over the appropriate transformations to use when conducting tests of whether the forward rate is an unbiased and efficient predictor of the future spot exchange rate 2 some authors e g frenkel 11 12 have conducted tests in levels while geweke and feige 14