fixing exchange rates a virtual quest for fundamentals abstract fixed exchange rates are less volatile than floating rates but the volatility of macroeconomic variables such as money and output does not change very much across exchange rate regimes this suggests that exchange rate models based only on macroeconomic fundamentals are unlikely to be very successful it also suggests that there is no clear tradeoff between reduced exchange rate volatility and macroeconomic stability

are all central bank interventions created equal an empirical investigation abstract this study investigates the relationship between central bank interventions and technical trading rule profitability in the spot foreign exchange market because interventions are not necessarily exogenous events we analyze the relationships between interventions by the g 3 central banks financial market conditions changes in monetary policy and technical trading profitability by considering announced unannounced unilateral and coordinated interventions separately we provide more insight into the interrelationships between these factors than previous studies we find that the level of technical trading profits and market uncertainty increase preceding and remain high during interventions especially announced and coordinated but decrease afterward a preliminary investigation of the possible role of a time varying risk premium around interventions cannot be rejected

foreign currency denominated borrowing in the absence of operating incentives abstract it is well known that corporations issue foreign currency denominated debt to hedge foreign currency cash flows with offsetting interest payments we test an alternative opportunistic motive for foreign currency denominated borrowing we do so by constructing a comprehensive sample of foreign currency denominated bonds issued by sovereign government and agency issuers with no foreign currency cash flows or foreign operations we find strong and consistent evidence that the borrowers in our sample consider cross currency differences in covered and uncovered interest yields in choosing the currency in which to denominate their international debt we estimate the average gains to opportunistic covered yield borrowing to be 4 to 18 basis points interestingly we also find that the average bond offering in our sample precedes a large and beneficial depreciation of the issue currency over the course of the following year these results support what has been a frequent conjecture in the foreign debt market

the dark side of buyer power supplier exploitation and the role of ethical climates media increasingly accuse firms of exploiting suppliers and these allegations often result in lurid headlines that threaten the reputations and therefore business successes of these firms neither has the phenomenon of supplier exploitation been investigated from a rigorous ethical standpoint nor have answers been provided regarding why some firms pursue exploitative approaches by systemically contrasting economic liberalism and just prices as two divergent perspectives on supplier exploitation we introduce a distinction of common business practice and unethical supplier exploitation since supplier exploitation is based on power we elucidate several levels of power as antecedents and investigate the role of ethical climate as a moderator this study extends victor and cullen s 1988 ethical climate matrix according to a supply chain dimension and is summarized in an integrated conceptual model of five propositions for future theory testing results provide a frame of reference for executives and scholars who can now delineate unethical exploitation and understand important antecedents of the phenomenon better

women on the board and managers pay evidence from spain the current literature shows great interest in the issue of gender diversity on boards of directors some studies have hypothesized a direct relationship between diversity and the value of the firm but not many examine the intermediate mechanisms that may exert an influence on such relationships we employ two stages of gmm estimation methodology to exhibit evidences of the relationship between gender diversity and compensation of top managers in the spanish context results show that gender diversity positively affects the effectiveness of boards in terms of composition structure size and functioning influencing a proper design of top managers compensation linked to company performance evidences suggest that legislative actions aimed at increasing the presence of women on boards of directors are justified not only for ethical reasons but also for reasons of economic efficiency

relationships among exchange rates intervention and interest rates an empirical investigation abstract this study uses herefore unavailable daily data on official intervention to test the joint hypotheses of perfect asset substitutability and exchange market efficiency this joint hypothesis is generally soundly rejected for six exchange rates over various sample periods in contrast to evidence elsewhere from weekly or monthly data lagged intervention is a significant determinant of realized profits in about half the cases this evidence is consistent with existence of a portfolio balance channel at least in the short run other evidence indicates that coordinated intervention sometimes may have an impact significantly different from intervention by one central bank alone

exchange rate volatility international trade and resource allocation a perspective on recent research abstract recent research on the effects of exchange rate volatility is discussed and directions for future research are explored the need to pay more attention to the effects of diversification and firms characteristic is emphasized it is suggested that while international risk has risen substantially since floating the differential between international and domestic risk may not this could help explain the failure of international trade to fall drastically and suggests that exchange rate volatility has been more a reflection than an independent cause of underlying instability

the statistical properties of daily foreign exchange rates 1974 1983 abstract this paper examines the statistical properties of daily rates of change of five foreign currencies from 1974 to 1983 the main purpose is to discriminate between two competing explanations for the observed heavy tails of the distribution that the data are independently drawn from a heavy tail distribution which remains fixed over time and that the data come from distributions which vary over time evidence point to the rejection of the first hypothesis further investigations show that the rejection can be attributed to changing means and variances in the data which can be described by a simple statistical model

currency swaps and long term covered interest parity abstract the present study employs daily data as opposed to weekly data used in previous studies to examine whether long term covered interest parity holds when a currency swap is used as a hedging instrument we find that large deviations were not rare during the late 1980s but such deviations have diminished in recent years

the microstructure of exchange rate management fx intervention and capital controls in brazil this article uses a microstructure approach to analyse the effectiveness of capital controls introduced in brazil to counter an appreciation of the real based on a rich data set from the brazilian foreign exchange market we estimate a reduced form var to characterize the interaction of the central bank financial and commercial customers in times of regulatory policy measures we find that capital controls change market participants behaviour and that central bank interventions elicit a significant response in financial order flow referring to the source of order flow we find no direct price impact by financial flows and thus no evidence that the appreciation of the real is driven by financial customers activity instead commercial customers seem to be a primary driver of the real within our model

an economic analysis of interest rate swaps interest rate swaps a financial innovation in recent years are based upon the principle of comparative advantage an interest rate swap is a useful tool for active liability management and for hedging against interest rate risk the purpose of this paper is to provide a simple economic analysis of interest rate swaps alternative uses of and the appropriate valuation procedure for interest rate swaps are described the significant increase in both the levels and the volatilities of market interest rates since the late 70 s has resulted in substantially higher interest rate risks faced by business firms and financial institutions the problem and consequences of interest rate risk exposure are particularly serious for firms in which the duration of assets does not match the duration of the liabilities for instance most financial institutions and many corporations financed long term fixed rate assets with short term floating rate liabilities such firms lose when the shortterm interest rates in the market rise unexpectedly because for given fixed rates of return on their assets the short term interest costs that they have to pay rise with the market interest rates conversely these firms gain from an unexpected decline in short term market interest rates in recent years the introduction and the development of new financial products in the capital markets such as interest rate futures interest rate options and interest rate swaps represent logical responses to the increased need to reduce firms exposure to interest rate risk

fuzzy adaptive decision making for boundedly rational traders in speculative stock markets abstract the development of new models that would enhance predictability for time series with dynamic time varying nonlinear features is a major challenge for speculators boundedly rational investors called chartists use advanced heuristics and rules of thumb to make profit by trading or even hedge against potential market risks this paper introduces a hybrid neurofuzzy system for decision making and trading under uncertainty the efficiency of a technical trading strategy based on the neurofuzzy model is investigated in order to predict the direction of the market for 10 of the most prominent stock indices of u s a europe and southeast asia it is demonstrated via an extensive empirical analysis that the neurofuzzy model allows technical analysts to earn significantly higher returns by providing valid information for a potential turning point on the next trading day the total profit of the proposed neurofuzzy model including transaction costs is consistently superior to a recurrent neural network and a buy hold strategy for all indices particularly for the highly speculative emerging southeast asian markets optimal prediction is based on the dynamic update and adaptive calibration of the heuristic fuzzy learning rules which reflect the psychological and behavioral patterns of the traders

the significance of technical trading rule profits in the foreign exchange market a bootstrap approach abstract in this paper we present new evidence on the profitability and statistical significance of technical trading rules in the foreign exchange market we utilize a new data base currency futures contracts for the period 1976 1990 and we implement a new testing procedure based on bootstrap methodology our results suggest that simple technical trading rules have very often led to profits that are highly unusual splitting the entire sample period into three 5 year periods reveals that on average the profitability of some trading rules declined in the latest period although profits remained positive on average and significant in many cases jel f31 f47 g15

a few good companies rethinking firms responsibilities toward common pool resources while a significant body of literature has highlighted the moral obligations of companies regarding the sustainable use of common pool resources business activities that contribute to the sustenance of common pool resources remain embryonic studies in this area have largely focused on environmental stimuli rather than on the complex motivational structures that drive or hinder businesses contributions to common pool resources we explore the different motives and behaviors of businesses and their contributions to common pool resources and propose four roles by which companies motives and behaviors toward common pool resources can be categorized namely free riders followers believers and altruists we shift the focus from moral reasoning to platt s am psychol 28 8 641 651 1973 notion of social trapping and his ways out as platt s ways out include propositions that address not only environmental stimuli but also companies motives both types of propositions are important for businesses to be able to respond rapidly to the scarcity of certain common pool resources and to use and maintain common pool resources in a sustainable way based on our categorization and platt s typology of social traps and ways out we propose a theoretical framework by which companies and other stakeholders are provided with a differentiating perspective that allows for propositions addressing the complex nature of motivational structures and common pool resources our framework helps business leaders institutions and policy makers decide on actions that can contribute to the sustainability of common pool resources and that differ from actions that solely serve organizational self interests

long term covered interest parity evidence from currency swaps abstract this paper constructs long term arbitrage conditions using a now well developed mechanism for hedging long term currency positions the currency swap using the arbitrage conditions bond yields denominated in different currencies are compared across the onshore markets of canada japan germany switzerland the united kingdom and the united states and within the euromarket the evidence indicates that long term financial capital is as mobile across these markets as is short term capital this appears to be the case both within the euromarket and across political jurisdictions

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

swap covered interest parity in long date capital markets using the currency swap as the forward exchange risk hedge the covered interest parity condition in the long date capital markets is evaluated of interest is the extent to which deviations from parity can be attributed to transactions costs the empirical conclusions presented in the paper suggest that although on average transactions costs account for deviations from parity net deviations in excess of transactions costs are neither rare nor short lived yet an analysis of the variance structure of covered interest parity reveals that these profit opportunities diminish over time and eventually disappear copyright 1996 by mit press

assessing the credibility of a target zone evidence from the ems this paper provides some new evidence on the credibility of the exchange rate mechanism erm of the european monetary system ems the study differs from previous research in the literature in three main respects first the main contribution is the use of several credibility indicators some of which have never been applied before to all of the currencies under study this allows one to strengthen the results obtained in this paper second a longer period than that of previous studies is analysed covering the complete ems history third a comparison has been made of the prediction qualities of the different indicators in order to explore their ability to capture the main erm events realignments changes in the fluctuations bands and speculative pressures fourth the indicators are applied to the experience of the new modified erm linking the currencies of non euro area member states to the euro showing the relevance of this approach in the near future with the enlargement of the european union

lessons from the evolution of foreign exchange trading strategies abstract the adaptive markets hypothesis posits that trading strategies evolve as traders adapt their behavior to changing circumstances this paper studies the evolution of trading strategies for a hypothetical trader who chooses portfolios from foreign exchange forex technical rules in major and emerging markets the carry trade and us equities the results show that a backtesting procedure to choose optimal portfolios improves upon the performance of nonadaptive rules we also find that forex trading alone dramatically outperforms the s p 500 with much larger sharpe ratios over the whole sample but there is little gain to coordinating forex and equity strategies which explains why practitioners consider these tools separately forex trading returns dip significantly in the 1990s but recover by the end of the decade and have been markedly superior to an equity position since 1998 overall trading rule returns still exist in forex markets with substantial stability in the types of rules though they have migrated to emerging markets to a considerable degree

local economic development agglomeration economies and the big push 100 years of evidence from the tennessee valley authority we study the long run eects of one of the most ambitious place based economic development policies in u s history the tennessee valley authority using a rich panel dataset of counties we conduct an evaluation of the dynamic eects of the tva on local economies in the seventy years following the program s inception we nd that the tva led to short run gains in agricultural employment that were eventually reversed while impacts on manufacturing employment continued to intensify well after the program s subsidies had lapsed a pattern consistent with the presence of strong agglomeration economies in the manufacturing sector economists have long cautioned that the local gains created by place based policies may be oset by losses elsewhere yielding ambiguous eects on the u s as a whole building on the framework in glaeser and gottlieb 2008 we develop a novel approach to assessing the aggregate consequences of shifting the spatial distribution of manufacturing employment our ndings suggest the aggregate productivity gains associated with relocating manufacturing activity to the tva region were probably minimal

singapore and the new regionalism bilateral trade linkages with japan and the us free trade areas ftas have recently become an integral part of singapore trade policy this paper discusses the reasons behind singapore s recent embracement of new regionalism with particular reference to the proposals to form ftas with japan and the us the paper goes on to examine various aspects of singapore s trade linkages with the two economic superpowers in some detail popular discussion of ftas gives one the appearance that such a trade policy is entirely benign the paper sounds a cautionary note highlighting some reasons to be concerned with singapore s recent embracement of the new regionalism

associative sustainable business models cases in the bean to bar chocolate industry abstract this study contributes to the growing literature of sustainability business models sbm by introducing a new category coined as associative sustainability business models asbm we theorize that this category encompasses firms with innovative business models that rely on partnership association and collaboration to create value in the triple bottom line and address pressing sustainability challenges following an inductive research approach we analyze four case studies of asbm ventures in the chocolate industry our findings reveal the emergence of two key theoretical constructs firm location and claimant identity that help to identify differences across asbm designs and lead to four different subcategories of asbm in addition drawing on the literature of sustainable business models we develop theoretical propositions that link our four subcategories of asbm to the business case for sustainability therefore we extend the literature on sbm by providing new insights on how business model innovations based on strong association and collaboration can generate solutions to social and environmental challenges

the links between international parity conditions and granger causality a study of exchange rates and prices this article investigates granger causality between exchange rates and prices for the us and four of its trading partners canada germany japan and the uk we emphasize the distinction between direct and indirect granger causality exchange rates directly cause prices if movements in exchange rates lead movement in prices and exchange rates indirectly cause prices if deviations from the purchasing power parity ppp condition can help forecast movement in prices but only by including the interest rate differential in our error correction model do we obtain results that align with economic theory the economic theory of ppp suggests that exchange rates and prices are cointegrated with exchange rates moving proportionally to prices in the long run in general we find either direct or indirect feedback mechanisms between exchange rates and prices

beating the foreign exchange market filter rule profits found in foreign exchange markets in the early days of the current managed float persist in later periods as shown by statistical tests developed and implemented here the test is consistent with but independent of a wide variety of asset pricing models the profits found cannot be explained by risk if risk premia are constant over time inclusion of the home foreign interest rate differential in computing profits has little effect on the comparison of filter returns to those of buy and hold in the early years of the generalized managed floating that began in march 1973 filter rule profits in excess of buy and hold were found for many countries logue sweeney and willett 18 dooley and shafer 6 cornell and dietrich 5 it was unclear however whether such profits indicated inefficiencies first it was not clear that risk was adequately handled in such tests and often risk was ignored second there was no evidence such profits would be available postsample and third there was no statistical test of the significance of these profits this paper uses the logic of risk return tradeoffs to analyze the role of risk in such tests and illustrates the logic in a discussion using the sharpe lintner capital asset pricing model capm although a breeden consumption based capm a merton intertemporal capm or an arbitrage pricing model apm could easily be used the paper develops a test of statistical significance appropriate to foreign exchange markets section i analyzing the rate of return on foreign exchange speculation less the foreign domestic interest rate differential the test explicitly assumes that risk premia are constant over the sample the excess rates of return observable in using filters in going from a risk free dollar asset to a risk free deutsche mark dm asset persist into the 1980 s section ii and this is true even when taking account of transactions costs it turns out that these results for the dm case do not depend very much on the interestrate differential but primarily on exchange rate behavior this is useful to know because it is often quite difficult to find matching interest rate data of high quality for a sample of nine other currencies using only exchange rates section iii shows that the excess returns made in the first 610 days of the float persist in the next 1 220 days into the 1980 s dooley and shafer 7 find similar persistence in experiments that do not use buy and hold and have no significance tests when filter rule profits have been found in spot exchange markets it has often been argued that the profits are due to risk this paper uses the capm to analyze rates of return both to buy and hold and to filter strategies it turns out that the claremont mckenna college and claremont graduate school arthur d warga douglas joines and thomas d willett offered helpful comments and ning ning koo provided research assistance

on the effectiveness of capital controls the experience of colombia during the 1990s abstract this paper analyzes the effectiveness of capital controls in colombia the evidence presented points towards a relative inability of the measures adopted to reduce the level of capital inflows nonetheless the evidence suggests that non remunerated deposits have been successful in inducing a recomposition of foreign liabilities in favor of long term maturities it is likely that this is a positive result as it has made the country less vulnerable to a reversal in capital flows in this sense controls may be viewed as an effective way of internalizing the negative externality imposed by short term maturities

anomalies foreign exchange most all behavior can be explained by assuming that agents have stable well defined preferences and make rational choices consistent with those preferences in markets that eventually clear an empirical result qualifies as an anomaly if it is difficult to rationalize or if implausible assumptions are necessary to explain it within the paradigm this column will present a series of such anomalies readers are invited to suggest topics for future columns by sending a note with some reference to or better yet copies of the relevant research comments on anomalies printed here are also welcome the address

does compulsory school attendance affect schooling and earnings we establish that season of birth is related to educational attainment because of school start age policy and compulsory school attendance laws individuals born in the beginning of the year start school at an older age and can therefore drop out after completing less schooling than individuals born near the end of the year roughly 25 percent of potential dropouts remain in school because of compulsory schooling laws we estimate the impact of compulsory schooling on earnings by using quarter of birth as an instrument for education the instrumental variables estimate of the return to education is close to the ordinary least squares estimate suggesting that there is little bias in conventional estimates every developed country in the world has a compulsory schooling requirement yet little is known about the effect these laws have on educational attainment and earnings 1 this paper exploits an unusual natural experiment to estimate the impact of compulsory schooling laws in the united states the experiment stems from the fact that children born in different months of the year start school at different ages while compulsory schooling laws generally require students to remain in school until their sixteenth or seventeenth birthday in effect the interaction of school entry requirements and compulsory schooling laws compel students born

are capital controls in the foreign exchange market effective one of the reasons for governments to employ capital controls is to obtain some degree of monetary independence in this paper we test whether capital controls can reduce the link between exchange rates fluctuations and cross border interest differentials recent capital control proxies are used in order to determine the date of capital account liberalization for a panel of western european and emerging countries results show that capital controls have a very limited effect on observed deviations from interest parities even when accounting for the political risk associated with capital controls

currency hedging and goods trade abstract a puzzle in empirical international finance is the difficulty in finding a large and negative effect of exchange rate volatility on international trade a common explanation is the availability of hedging instruments this paper examines the empirical validity of this explanation using data on over 1000 country pairs which countries have currency hedging instruments is not perfectly observable this paper deals with the problem by specifying an endogenous regime switching regression there are two main findings first there is no evidence in the data to support the validity of the hedging hypothesis second for country pairs with large trade potential exchange rate volatility deters goods trade to an extent much larger than that typically has been documented in the literature without using the switching regression specification

the agent ss ethics in the principal agent model this paper evaluates the current use of the principal agent model pam in accounting and finance focusing on the agent ss use of private information the agent ss behavioral norms in the the pam deviate from commonly held ethical values in society from models of man in conventional economic theory and also from behavioral foundations of related business school fields like corporate strategy business ethics and human resource management still it would be unwise to reject the pam solely because of its distasteful ethical assumptions the model does appear to have predictive power but its descriptive or normative qualities remain unexplored the popularity of the pam with its extreme model of man raises fundamental questions about the impact of this model on business school stakeholders and society at large

can markov switching models predict excess foreign exchange returns abstract this paper merges the literature on technical trading rules with the literature on markov switching to develop economically useful trading rules the markov models out of sample excess returns modestly exceed those of standard technical rules and are profitable over the most recent subsample a portfolio of markov and standard technical rules outperforms either set individually on a risk adjusted basis the markov rules high excess returns contrast with mixed performance on statistical tests of forecast accuracy there is no clear source for the trends but permitting the mean to depend on higher moments of the exchange rate distribution modestly increases returns

would international currency taxation and currency stabilisation in developing countries completely flexible exchange rates may be excessively volatile with the implied currency misalignments leading to real inefficiencies in resource allocation and detrimental effects on economic growth this paper analyses whether international currency taxation would be effective in calming exchange rate volatility and avoiding currency crises within the context of a simple model of exchange rate determination it is found that the effects of a tax on foreign exchange volatility depend on the nature of speculation and whether the focus is on capital inflows or outflows

swaps expectations and exchange rates abstract this paper explores the influence of expectations of a significant subset of the foreign exchange market viz the u s commercial banks on foreign exchange rates for this purpose conventional swap transaction was utilized in a refined framework to enable more accurate extraction of the u s commercial banks expectations from their observed behavior statistical results suggest that although riskless arbitrage opportunities were fully exploited in this market the group under observation either influenced the pound sterling exchange rates in a significant manner or had superior market timing skills

a non parametric analysis of covered interest parity in long date capital markets abstract the financially innovative currency swap has elevated the international mobility of long term assets of interest is whether the covered interest parity condition now holds in these markets with the currency swap as the forward exchange risk hedge the empirical conclusions presented in the paper suggest that deviations from covered interest parity in excess of transactions costs are not rare yet while profit opportunities are not always short lived an analysis of the deviations in excess of transactions costs reveals that they diminish over time and eventually disappear jel f32

when and how us dollar shortages evolved into the full crisis evidence from the cross currency swap market abstract this paper investigates when and how the us dollar shortages evolved into the full crisis in the cross currency swap market between major european currencies and the us dollar during the turmoil of 2007 2009 using the dynamic factor model with regime switching coefficients of each swap price with respect to the latent common factor the 1 year market entered the high crisis regime soon after the onset of the subprime problem in august 2007 the 10 year market entered that regime following the collapse of bear sterns in mid march 2008 financial credit spreads have significant predictive power for switches between high and low regimes

are grains of sand in the wheels of international finance sufficient to do the job when boulders are often required this paper criticises the effectiveness of a tobin tax in acting as a deterrent to short run round trip speculation on exchange rate movements it is demonstrated that given the usual magnitude of a proposed tobin tax the deterrent to short term speculation will be negligible and in all likelihood smaller than the deterrent to real trade flows and arbitrage activities finally an alternative proposal for preventing currency speculations while creating incentives for global full employment based on keynes s 1940s writings is proposed

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

technical analysis and central bank intervention abstract this paper extends genetic programming techniques to show that us foreign exchange intervention information improves technical trading rules profitability for two of four exchange rates over part of the out of sample period rules trade contrary to intervention and are unusually profitable on days prior to intervention indicating that intervention is intended to halt predictable trends intervention seems to be more successful in checking such trends in the out of sample 1981 98 period than in the in sample 1975 80 period any improvement in performance results from more precise estimation of the relationship between current and past exchange rates rather than from information about contemporaneous intervention

banking on currency forecasts how predictable is change in money abstract the paper examines the predictive performance of four structural exchange rate models using both parametric and nonparametric techniques error correction versions of the models are fit so that plausible long run elasticities can be imposed on the fundamental variables of each model a variety of model evaluation statistics are reported our findings confirm that fundamental exchange rate models forecast no better than a random walk model for short term prediction horizons for longer horizons error correction terms can explain exchange rate movements significantly better than a no change forecast for a subset of the models and currencies we consider

nonparametric instrumental variables estimation abstract in many economic models objects of interest are functions which satisfy conditional moment restrictions economics does not restrict the functional form of these models motivating nonparametric methods in this paper we review identification results and describe a simple nonparametric instrumental variables npiv estimator we also consider a simple method of inference in addition we show how the ability to uncover nonlinearities with conditional moment restrictions is related to the strength of the instruments we point to applications where important nonlinearities can be found with npiv and applications where they cannot

the time variation of expected returns and volatility in foreign exchange markets this article analyzes the time variation in conditional means and variances of monthly and quarterly excess dollar returns on eurocurrency investments all results are based on a vector autoregression with weekly sampled data on exchange rate changes and forward premiums of three currencies both past exchange rate changes and forward premiums predict future forward market returns moreover past forward premium volatilities predict the volatility of exchange rates expected forward market returns are very variable and persistent and exhibit marked comovements these results carry over to cross rate e g yen mark investments as well

transactions costs and covered interest arbitrage theory and evidence the extent to which deviations from covered interest parity can be attributed to transactions costs has been exaggerated in the economic literature because the swap market in foreign exchange has been ignored it is shown that such deviations should be no greater than the lowest of the transactions costs in one of three markets the swap market or either of the two relevant securities markets this reconciles the theory with the data which show spreads of no more than a few basis points however the empirical results have no direct bearing on the conventional market efficiency hypothesis

equilibrium exchange rate hedging we assume a world like the one that gives the capital asset pricing model but with many goods and many countries we assume that investors in a given country have homothetic utility functions with the same weights and a currency that has a sure endof period value using a price index with those weights siegel s paradox derived from jensen s inequality makes investors want a positive amount of exchange risk when average risk tolerance is the same across countries every investor will hold the same mix of market risk through the world market portfolio of all assets and exchange risk in a diversified basket of foreign currencies in fact the ratio of exchange risk to market risk is equal to the average investor s risk tolerance we can write the ratio of exchange risk to market risk and the fraction of the market s exchange risk that investors hedge as depending on an average of world market risk premia an average of world market volatilities and an average of exchange rate volatilities the weights in these averages are the same as the weights of the different countries in the currency basket given these averages the ratio and the fraction hedged will not depend directly on exchange rate means or covariances in equilibrium we can use the ratio of exchange risk to market risk to measure average risk tolerance in this model risk tolerance is observable

the impact of exchange rate volatility on international trade flows despite the best efforts of economists a basic paradox as to the impact of exchange rate volatility on trade flows remains unresolved at both the theoretical and empirical level this paper surveys the vast literature in the area in an attempt to identify major issues which have contributed to the development of the debate and examine whether any general direction for consensus may be found

exchange rate policy options for post crisis southeast asia is there a case for currency baskets following the recent financial crises in southeast asia and elsewhere the perennial issue of the exchange rate policy options for small and open developing countries has resurfaced there seems to be an emerging consensus that the frequency with which soft pegs have been susceptible to speculative attacks in this era of escalating global capital flows has increased pressure for developing countries to adopt corner exchange rate regimes this paper takes issue with this popular one size fits all prescription of exchange rate arrangements for developing countries and explores exchange rate policy options for post crisis southeast asia the principal purpose of this paper is to discuss the case for currency baskets as a general regime in its own right for southeast asia as opposed to being a compromise between the two corner solutions

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

the nature of the firm agency theory and shareholder theory a critique from philosophical anthropology standard accounts on the nature of the firm are highly dependent on explanations by coase coupled with inputs from agency theory and shareholder theory this paper carries out their critique in light of personalist and common good postulates it shows how personalist and common good principles create a framework that not only accommodates business ethics better but also affords a more compelling understanding of business as a whole

transaction costs and the interest parity theorem comment a recent empirical study by bahmani oskooee and das 1985 concludes that transaction costs fail to explain the variation in absolute percentage spreads between actual forward rates and rates implied by covered interest rate arbitrage denoted by ipi this strong conclusion is based on a regression that has several problems first the data contain both errors and omissions which we correct second their econometric model does not effectively capture the effect they are seeking to measure and is inconsistent a more complete statistical model is necessary both for consistent parameter estimation and for drawing inferences that shed light on the condition they attempt to test without subscribing to the modeling approach of bahmanioskooee and das this study finds that i correcting the errors and omissions in their data changes the regression results significantly including a significant sign change for the transaction cost effect ii using their variable definitions one may obtain a zero r2 and zero coefficient for transaction costs even if they explained all the variation in ipi and iii an alternative measure of the effects of transaction costs that is more consistent with the authors approach and theory suggests that transaction costs may explain up to 60 percent of the variation in ipi in addition this study cautions against drawing strong conclusions from data derived from the standard sources employed by bahmani oskooee and das even after the errors are removed section i discusses some of the problems with the data in bahmanioskooee and das these problems are important in an era of heightened awareness regarding the issue of replicability see for example dewald thursby and anderson 1986 on the journal of

testing for long horizon uip using ppp based exchange rate expectations abstract this paper revisits the uncovered interest parity relation it supplements existing work in two ways it focuses on long instead of short term interest rates and related to that employs exchange rate expectations derived from purchasing power parity ppp instead of actual outcomes among the major floating currencies over the period 1975 1997 the paper cannot support the notion of further increases in uip validation beyond that associated with the wave of financial market liberalization and deregulation in the early 1980s

foreign exchange trading models and market behavior abstract the contributions of this paper are twofold first the performance of a widely used commercial real time trading model is compared with a simple exponential moving average model second the trading models are used as diagnostic tools to evaluate the statistical properties of foreign exchange rates the results presented in this paper have a general message to the standard paradigm in econometrics it is not sufficient to develop sophisticated statistical processes and choose an arbitrary data frequency e g one week one month annual etc claiming afterwards that this particular process does a good job of capturing the dynamics of the data generating process in financial markets the data generating process is a complex network of layers where each layer corresponds to a particular frequency a successful characterization of such data generating processes should be estimated with models whose parameters are functions of intra and inter frequency dynamics in other fields such as in signal processing paradigms of this sort are already in place our understanding of financial markets would be increased with the incorporation of such paradigms into financial econometrics our trading models within this perspective help to observe this subtle structure as a diagnostic tool

stable classes of technical trading rules technical analysis includes a huge variety of trading rules this fact has always been a serious hindrance to the large number of market efficiency studies implemented either to demonstrate the profitability of market beating systems or to deny their operational feasibility for evident reasons it is practically impossible and theoretically weak to systematically analyse the entire body of all trading rules we therefore propose a novel method to form natural classes of trading rules which are found to be robust to changing market scenarios in particular groups are formed adopting a similarity measure based on the investing signals of the trading rules our clustering methodology adopts a markov chain bootstrapping technique to generate differentiated scenarios preserving volume and price joint distributional features an application is developed on a sample of 674 trading rules results show that six groups here identified as trading styles are sufficient to explain the large portion of the investing