who withdraws housing equity and why the decision to extract home equity is examined using household level data for the uk over 1993 2003 at its peak during the period around 1 in 10 homeowners withdraw equity per year little is known about this financial decision i find that the equity withdrawal decision conforms to predictions from the standard life cycle framework and models that predict its use as a financial buffer the paper also estimates responses to the large house price appreciation and significant reductions in mortgage rates seen during the period

diverse information and market efficiency in a monetary model of the exchange rate tests of informational efficiency of a given market involve testing two hypotheses simultaneously the first is the hypothesis about the structure determining equilibrium prices or returns and the second is the hypothesis about the information used in formulating expectations and the ability of agents to set current prices to conform with their expected values we examine this issue in the context of the foreign exchange market by setting up a simple model of exchange rate determination and using equilibrium properties of the model to examine market efficiency the model of exchange rate determination involves monetary equilibrium and rational expectations by virtue of the latter equilibrium prices by definition fully reflect available information yet we show that conventional tests of market efficiency would fail when confronted by data generated by such a model we then proceed to define more restrictive and more appropriate concepts of informational efficiency we also illustrate and clarify a fundamental misconception with current rational expectations models we believe that the current models employing the rational expectations hypothesis overemphasize the distinction between monetary and real shocks and underemphasize the distinction between permanent and transitory distinctions for expectations formation the conventional efficiency tests it is the latter distinction that is the essential one this abstract was borrowed from another version of this item

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

exchange rates and news reply abstract in this reply i arge that the results of my 1982 article in this journal are not affected either at a theoretical or empirical level by longworth s 1984 comments however i also argue that longworth s proposition of including variables pertaining to other countries in empirical market efficiency studies should be investigated further

co integration and error correction models the temporal causality between government taxes and spending several interesting papers have recently considered whether government taxes granger cause government spending or vice versa the findings based on standard granger 6 causality tests are not consistent manage and marlow 10 conclude that when evidence of one way causality exists federal taxes granger cause federal spending while anderson wallace and warner 1 conclude that the evidence supports one way causality in the opposite direction ram 11 reexamining the issue concludes that taxes granger cause spending at the federal level but that spending granger causes taxes at the state and local level von furstenberg green and jeong 13 in another related article examine the tax and spend spend and tax causality issue using a more general vector autoregressive var model they introduce in addition to federal taxes and spending two economic variables the gnp gap and the inflation rate decompose federal spending into several categories and remove the effects of automatic stabilizers when appropriate they find little evidence that taxes granger cause spending and limited evidence that spending causes taxes a finding which corresponds most closely to that of anderson wallace and warner 1 our purpose is to reconsider the causality issue with the aid of co integration and errorcorrection modeling our analysis illustrates with a specific example how sources of causality can be neglected in standard granger causality tests moreover addressing the question of temporal causality between government taxes and spending provides insight as to how different policies might or might not help control the growth of government the results of our estimating various co integration and error correction models with quarterly data suggest bi directional causality between government taxes and spending both for the federal and state and local sectors this finding counters the conclusions of previous studies when annual data are used however our

the speculative efficiency hypothesis the hypothesis that forward prices are the best unbiased forecast of future spot prices is often presented in the economic and financial analysis of futures markets this paper considers the hypothesis independently of its implications for rational expectations or market efficiency and in order to stress this fact the term speculative efficiency is used to characterize the state envisaged under the hypothesis if a market is subject to efficient speculation the supply of speculative funds is infinitely elastic at the forward price that is equal to the expected future spot price the expected future spot price is a market price determined as the solution to the underlying rational expectations macroeconomic model although the paper is primarily concerned with testing this hypothesis in the foreign exchange market the methodology introduced in the paper is of general application to all futures markets this abstract was borrowed from another version of this item

u s fiscal policy and trade deficits a broad perspective the emergence of large government budget deficits and large international trade deficits stands out as the dominant feature of u s macroeconomic behavior since the early 1980s economists trained in the traditional keynesian theory have pointed to the budget deficit as the major cause of the trade deficit according to the mundell fleming model changes in the budget deficit trigger changes in the real interest rate the real exchange rate and the level of real income which in turn alter the trade balance others believing in the real world relevance of the ricardian equivalence proposition have argued that the deficits are not really twins but merely distant cousins if not entirely unrelated if ricardian equivalence holds shifts between taxes and borrowing have no effect on real interest rates or aggregate demand previous studies of the twin deficits have adopted a variety of approaches both theoretical and empirical theoretical treatments run the gamut from the standard mundell fleming model 18 to the ricardian model 7 to the atheoretical 1 2 3 4 12 14 17 empirical approaches range from simple single equation ols 5 6 16 to two stage least squares applied to a system of structural equations 18 to unconstrained var modeling 1 2 12 17 to cointegration 3 14 the variables used to measure the budget and trade deficits vary across studies as does the set of related variables included in the models the form in which the data are utilized e g as a ratio of gnp or as a first difference of levels also differs across studies not surprisingly a variety of results emerges table i provides a brief overview of a number of studies the estimated effects of budget deficits on the trade balance range from the substantial 12 to statistically insignificant 7 abell 1 2 finds the transmission mechanism to be primarily through interest and exchange rates while zietz and pemberton 18 find that channel to be insignificant in comparison to the domestic absorption channel yet some studies do not even include domestic income as a separate variable in their equations making cross study comparisons difficult thus it is impossible to draw with confidence any conclusions about the twin deficits relationship this confusion of results leads us to examine systematically the relationship between the two deficits using a multivariate model in this paper we report the results of a systematic analysis of the link between the deficits using a five variable system for the flexible exchange rate period 1973 1 to 1991 iv we begin with

budget deficits and national saving are politicians exogenous during the thirty five year period following world war ii the federal budget deficit averaged less than one percent of net national product never once exceeding five percent for the five year period from 1982 86 the budget deficit never once fell below five percent of net national product there have been some modest cutbacks recently and the deficit is likely to fall to about four percent of net national product in 1988 further declines are now projected in the congressional budget office 1988 baseline forecast of the implications of present policies but both 1988 presidential candidates suggested many more policies that would increase than decrease the deficit these numbers indicate that after years of relative abstinence the united states has experimented with persistent budget deficits on a rather massive scale in the 1980s economists have generally been quite critical of this fiscal policy though there are at least three respectable minority views arguing that federal deficits are not so bad and quite possibly better than likely corrective measures the rationale for economists general opposition comes from those who hold what is called the neoclassical view of deficits according to this view if the united states should be treated as a closed economy persistent deficits will raise interest rates and lower investment if the united states should be treated as a small open economy persistent deficits will leave real interest rates and investment unchanged but the drop in national saving would be financed by higher foreign borrowing accomplished through a rise in the dollar and a drop in net exports either way net national saving falls and consumption rises at the expense of some combination of investment and net exports as a result living standards are higher in the present but lower in the future compared to what they would be in a world of no deficits

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

speculative profit opportunities in the canadian foreign exchange market 1974 78 this paper shows that a number of simple theoretically based exchange rate models could have been used to speculate profitably in the canada united states exchange market over the period 1974 78 and that these unexploited profits were surprisingly large estimated models and autoregressive forecasts of their explanatory variables based only on information available at each point in time were used to take uncovered positions based on the forecasted direction of forward rate error these unexploited profits provide strong evidence of market inefficiency and or the existence of a time varying risk premium possibilites de profits speculatifs sur le marche des changes canada etats unis 1974 78 ce memoire montre qu on aurait pu faire bon usage d un certain nombre de modeles theoriques simples du taux de change entre le canada et les etats unis pour speculer avec profit sur le marche des changes canada etats unis entre 1974 et 1978 il semble que la taille de ces profits non encaisses est etonnamment considerable l auteur utilise des modeles et des previsions a partir de specifications autoregressives pour obtenir la valeur des variables independantes en utilisant seulement les renseignements disponibles a tout moment donne afin de definir les positions speculatives a decouvert suggerees par la direction prevue de l erreur dans le taux de change sur le marche a terme l existence de tels profits non exploites suggere l existence d inefficacite dans le inarche et ou l existence d une prime de risque qui varie avec le temps

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

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

investment in wind power and pumped storage in a real options model abstract promoting renewable energy has been a key ingredient in energy policy seeking to de carbonize the energy mix and will continue to do so in the future given the european union s high ambitions to further curb carbon emissions a wide range of instruments has been suggested and implemented in various countries of the eu a prominent policy promoting investment in renewable technologies is the use of feed in tariffs which has worked well at large scale in e g germany but which has only been implemented in a very limited way in countries such as the uk being subject to environmental uncertainties however renewables cannot be seen in isolation while renewables based technologies such as wind and solar energy for example suffer from uncertain loads depending on environmental conditions hydropower allows for the storage of water for release at peak prices which can be treated as a premium partially offsetting higher upfront investment costs in addition electricity prices will respond to changes in electric capacity in the market which is often neglected in standard investment models of the electricity sector this paper contributes to the existing literature in two ways it provides a review of a renewables based technology in a specific policy context and provides additional insight by employing a real options approach to investigate the specific characteristics of renewables and their associated uncertainties in a stylized setting taking explicitly into account market effects of investment decisions the prices of the model are determined endogenously by the supply of electricity in the market and by exogenous electricity price uncertainty the inclusion of market effects allows us to capture the full impact of public incentives for companies to invest into wind power and hydro pumped storage installations

the twin deficits phenomenon evidence from greece this paper explores the relationship between budget and trade deficits in a small open economy using annual data the purpose of the paper is to test empirically the validity and rationale of the keynesian proposition conventional view and the ricardian equivalence hypothesis the econometric methodology is based on cointegration analysis error correction modelling and granger trivariate causality the ecm empirical findings suggest that budget deficit has short and long run positive and significant causal effects on trade deficit

compound real options valuation of renewable energy projects the case of a wind farm in serbia abstract renewable energy sources have become a very important issue due to environmental and sustainability concerns in addition most renewable energy electricity generation res e projects are characterized by considerable uncertainty and sequential decision making these projects net present value npv is very often close to zero which renders them a good candidate for the application of real options valuation methodology of investment project appraisal this paper examines the real options valuation of a potential onshore wind farm project in serbia the binomial tree model spans a 15 year period consisting of a 2 year investment period and a 13 year operating period the first 12 years of which are protected by feed in tariffs according to local renewable energy regulations the authors examine a multi phased compound nested path dependent real option consisting of mutually exclusive options a sequential option to invest as well as expand repower contract and abandon options volatility which is calculated by means of a monte carlo simulation according to the logarithmic present value returns approach shows predominant sensitivity to the capacity factor simulated with the rescaled weibull s probability distribution the final binomial tree results show that the proposed sequence of options increases project value by transforming higher risk and lower return in the initial discounted cash flow model to lower risk and higher return in the ro model this paper contributes to the existing literature in at least two ways it presents in depth analysis of the real option application to the res e project and provides decision makers with sophisticated tool for improving strategic thinking capital budgeting and decision making processes

twin sons of different mothers the long and the short of the twin deficits debate i introduction the relationship between the government budget deficit and the current account deficit has been a contentious subject in empirical macroeconomics for at least the past 20 yr papers have variously found a positive link no link and three recent pieces even find a negative link between the two there are however some things that almost all these studies have in common for example they ignore the possibility of structural breaks in the series when examining their time series properties most previous studies treat the variables under study as being integrated of order 1 which is to say as having a unit root this is a hard assumption to square with the fact that the variables are measured as fractions of gross domestic product gdp and have over the last half century at least shown no inclination toward typical unit root behavior by contrast in three recent pieces corsetti and muller 2006 kim and roubini 2008 muller 2006 the two series are simply treated as pure stationary processes without any pretesting which obviously conflicts with results from the traditional unit root tests in this article we show that both the budget deficit and the current account deficit are stationary around an occasionally shifting mean which is to say that they have structural breaks but are stationary after allowing for those breaks since it is well known that traditional unit root tests have little power when the underlying data contain structural breaks this explains the puzzling finding that the budget deficit and the current account deficit expressed as fractions of gdp test out as i 1 series in practice our findings also cast doubt on the validity of assuming the two series are purely stationary processes given our framework a simple test for the existence of a long run equilibrium relationship between budget and current account deficits is to compare the number and timing of their structural shifts we find that the two series are not closely related either in their number of breaks or in their timing of structural shifts we thus conclude that over the long run genetically the deficits are not twins another factor that existing studies have in common is their treatment of the error structure of the model as homoskedastic despite relatively clear visual evidence of volatility clustering conditional heteroskedasticity in least squares residuals when we consider the short run dynamics of the demeaned variables through a vector autoregression var analysis we show that the error covariance of this var model is significantly conditionally heteroskedastic and go on to specifically account for this phenomenon with a var generalized autoregressive conditional heteroskedasticity garch model we consider a trivariate model that also includes the real interest rate here we find a significant and sizeable positive short run effect of budget deficit innovations on the current account deficit in both the impulse response functions and the variance decompositions of the model our answer to the question of the paternity of the two deficits thus depends on the horizon studied each series has structural breaks that are largely independent of each other so they are not twins at all over the long run however once we allow for these secular shifts the short run dynamics reveal a very strong family resemblance indeed the rest of the article is organized as follows in section ii we review some of the existing empirical literature section iii discusses the time series properties of the data and presents our results about the long run evidence on the twin deficits question section iv sets out our var garch model and presents our results on short run twin deficits behavior section v is a brief conclusion ii an overview of the empirical literature the relationship between current account deficits and government budget deficits has been a subject of extensive study

a real option model for renewable energy policy evaluation with application to solar pv power generation in china abstract this study proposes a policy evaluation model from the perspective of government and investors the proposed model which integrates american option method and two factor learning curve method can be used to evaluate the unit decision value and save path rate for renewable energy development and examine the existence of balance point of interest several uncertain factors including non renewable energy cost carbon price renewable energy cost and price subsidy are all considered in this model the model has been applied to evaluate the solar photovoltaic pv power generation in china our empirical results show that real option analysis roa is more effective than net present value analysis npv when handling uncertainty under current level of subsidy the government would suffer loss and the investors could benefit so that it is difficult to achieve the balance of interest during the planning period with the reduction of subsidy rate they can achieve the balance of interest

the impact of chinese carbon emission trading scheme ets on low carbon energy lce investment china is planning to introduce emission trading scheme ets to decrease co2 emission as low carbon energy lce will play a pivotal role in reducing co2 emissions our paper is to assess the extent and the conditions under which a carbon ets can deliver lce investment in china we chose wind technology as a case study and a real option based model was built to explore the impact of a number of variables and design features on investment decisions e g carbon and electricity price carbon market risk carbon price floor and ceiling and on grid ratio we compute critical values of these variables and features and explore trade offs among them according to our work a carbon ets has a significant effect on wind power plant investment although it cannot support investment in wind power on its own carbon price stabilization mechanisms such as carbon price floor can significantly improve the effect of carbon ets but the critical floor to support investment is still much higher than the carbon price in china pilot etss our results show that other policy measures will be needed to promote low carbon energy development in china

have large budget deficits caused rising trade deficits for the united states the 1980s have been years of both large and unprecedented trade deficits as well as massive federal budget deficits the trade deficit rose from 25 billion in 1980 to 124 billion in 1985 during this same period federal budget deficits soared from 74 billion in 1980 to more than 212 billion in 1985 it is widely believed that the u s trade deficit rose mainly because of the skyrocketing federal budget deficit presenting such a view are for example hutchison and pigott 25 hutchison and pyle 26 clark 11 modigliani 30 and aschauer 2 besides economists many labor unions i e afl cio and official government documents see the economic report of the president particularly of 1984 have all shared similar views the issues involved have important policy implications suppose that the basic reason for rising trade deficits is indeed the escalating federal budget deficit in this case policy makers may focus on curtailing the budget deficit in order to resolve the trade deficit problem that has adversely affected several sectors such as manufacturing industries and agriculture however if such a view concerning the causal role of the budget deficit is incorrect then reductions in the federal budget deficit may not resolve the trade deficit dilemma and moreover attention will be diverted from more relevant and urgently needed policy options 6 the purpose of this paper is to empirically investigate the conventional argument that high federal budget deficit has been the prime cause of the escalating u s trade deficit finding only partial empirical evidence to support it in section ii i argue that most of previous studies in this area appear flawed by a methodological error rendering their tests unreliable for discriminating between a number of equally plausible hypotheses section iii describes the data and methodology used in the paper section iv presents the empirical results section v summarizes and concludes the paper

tests of the hypothesis of the existence of risk premium in the foreign exchange market abstract this paper tests for a risk premium in the foreign exchange market the null hypothesis of the test is the random walk hypothesis in the foreign exchange market the alternative hypothesis is that biases of current spot rates or forward rates from future spot rates are systematically related to a set of economic variables on which a risk premium may depend this paper provides firm evidence for a risk premium in the foreign exchange market the risk premium explains 10 20 of the total variance in future spot rates when the us dollar mark quarterly rates are used the magnitudes are smaller less than 10 for monthly rates

exchange market efficiency an examination of speculation across forward markets abstract the rejection of the joint hypothesis of exchange market efficiency and no risk premium is shown to hold up all across the term structure of forward rates for the canadian dollar u s dollar exchange rate

the effect of excessively elastic expectations on exchange rate volatility in the dornbusch overshooting model abstract bilson has described the empirical finding that the forward exchange rate overestimates the speed of return to equilibrium as a finding of excessive speculation and has drawn implications for the volatility of the exchange rate the present paper pursues this tack within the sticky price monetary model made famous by dornbusch it is shown theoretically that if the market overestimates the speed of adjustment the degree of overshooting is reduced in this sense excessive speculation leads to reduced volatility

accounting for us current account deficits an empirical investigation the sources of us current account deficits are investigated using a number of macroeconomic variables and a vector error correction model the variables are those typically emphasized by the traditional income expenditure approach and the intertemporal ricardian approach the results indicate that macroeconomic variables explain the current account reasonably well and the evidence seems to support the traditional approach where budget deficits and increases in real interest rates and terms of trade are associated with current account deficits

budget deficits rhetoric and reality w v t hatever the real or imagined ills of the economy the news media most politicians and a fair proportion of the economics profession are quick to point to the culprit the budget deficit no matter that few appear to know or care precisely what deficit they are talking about or how it is measured no matter that few bother to explain in terms of a relevant model just how government deficits may be expected to impact the economy no matter that few offer any empirical data to sustain their judgments so budget deficits cause inflation budget deficits raise interest rates budget deficits bring on the trade deficits budget deficits crowd out investment budget deficits are an irresponsible mortgage on the future and budget deficits caused the october 1987 stock market crash and now threaten further financial cataclysms is there truth in any of these assertions or does it all depend budget deficits do matter and their effects contrary to barro s ricardian equivalence theorem can be substantial as most economists have recognized for at least half a century budget deficits can however be too small as well as too large to know which you have to measure them right and you have to analyze their role in the world in which we live pure walrasian and rational expectation market clearing models may prove more useful for academic advancement than for promotion of economic health i need not repeat many of the objections to the equivalence theorem raised by bernheim and gramlich and addressed by barro in this symposium however there is

exchange rates and news a comment abstract although in a world with more than two countries the error term in standard exchange market efficiency tests will be correlated across exchange rates such information cannot be exploited in tests of market efficiency since the relevant information variables are the same in all equations and thus seemingly unrelated regression estimates are the same as ordinary least squares estimates

estimation of portfolio balance functions that are mean variance optimizing the mark and the dollar abstract this paper offers a way of efficiently estimating the parameters in demand functions for mark and dollar assets the technique imposes the constraint that the parameters rather than being determined arbitrarily are based on investors optimizing behavior regarding expected returns and variances it dominates some previous empirical applications of finance theory in the respect that the expected returns are allowed to vary from period to period which is a necessary feature of any macro model the constraint that the parameters are based on mean variance optimization is also tested and not rejected

twin deficits apparition or reality this paper uses cointegration and multicointegration analysis to explore the issue of twin deficits for the usa in the post world war ii period the results suggest that prior to 1974 the systems of fiscal and foreign sector variables exhibit multicointegration these results do not rule out short run correlations between government deficits and external deficits however they do preclude the possibility that the twin deficit phenomenon describes a long run structural relationship in the post world war ii bretton woods era in the more recent period 1974 forward neither system exhibits evidence of multi cointegration but weak evidence of cointegration is present between fiscal deficits and trade deficits error correction models suggest that causality runs from internal to external deficits in the dynamic adjustment process this evidence provides some support for the notion that more recently fiscal deficits may have contributed to external deficits in combination with the results from the early s

the forward exchange rate and macroeconomics abstract this paper discusses the conditions under which a risk premium is incorporated in the forward exchange rate a new condition for the existence of a risk premium is proposed we show that earlier models of the risk premium which emphasize either the role of net foreign investment or of the relative supplies of outside assets are not suited for assessing the effects of changes in macroeconomic policy

off shore enhanced oil recovery in the north sea the impact of price uncertainty on the investment decisions although co2 capture and storage ccs is considered a key solution for co2 emission mitigation it is currently not economically feasible co2 enhanced oil recovery can play a significant role in stimulating ccs deployment because co2 is used to extract additional quantities of oil this study analyzes the investment decision of both a carbon emitting source and an oil company separately by adopting a real options approach it is shown that when uncertainty is integrated in the economic analysis co2 and oil price threshold levels at which investments in co2 capture and enhanced oil recovery will take place are higher than when a net present value approach is adopted we also demonstrate that a tax on co2 instead of an emission trading system results in a lower investment threshold level for the investment in the co2 capture unit furthermore we determine a minimum co2 selling price between the two firms and show that co2 eor has the potential to pull ccs into the market by providing an additional revenue on the capture plant however when co2 permit prices are above an identifiable level the eu ets does not necessarily result in the adoption of ccs and stimulates oil production

why is the u s current account deficit so large evidence from vector autoregressions most observers consider large u s current account deficits to have been the main contributor to world macroeconomic imbalance in the 1980s the implications of continuing u s current account deficits of 100 to 200 billion dollars per year are troubling other countries must adjust to the scarcity of capital as the united states acquires a significant portion of the world s savings at the same time u s companies seek protection from unfair foreign competition as foreign companies increase market share in the united states determining the source of the problem and designing the correct solution are therefore major objectives of economic research policymakers and economists have suggested a number of reasons for the sudden jump in the current account deficit different schools of thought have therefore proposed different policy responses ranging from doing nothing to radically altering the country s commercial policy debate has centered on the proposed policies with little attention paid to comparing the explanatory power of the underlying hypotheses

aging and the income value of housing wealth abstract the potential of reverse annuity mortgages to increase the current income of the elderly is analyzed we conclude that most low income elderly also have little housing equity in general a reverse annuity mortgage would substantially affect the income only of the single elderly who are very old whose life expectancy is short on the other hand if the transfer were in the form of a lump sum payment rather than an annuity the payment would increase the liquid wealth of most elderly families by a large fraction thus legislation that would facilitate the market for reverse mortgages could improve substantially the financial status of a small proportion of the elderly

on the effects of sterilized intervention an analysis of weekly data abstract as the recent empirical studies surveyed here illustrate it is very difficult to demonstrate that the exchange rate risk premium depends through a portfolio balance channel on the currency composition of outside assets the existence of a portfolio balance effect is a necessary condition for sterilized intervention to be a genuinely independent tool of monetary policy this paper studies u s canadian data and attempts to improve on earlier studies by using higher frequency weekly data and by implementing an appropriate instrumental variables technique 2s2sls however we still fail to detect evidence of a portfolio balance effect

forward exchange rates as predictors of future spot rates and the efficiency of the foreign exchange market abstract the theory of informationally efficient markets emit is applied to the foreign exchange market and some of its operational implications are illustrated the emit is joined with alternative models of the equilibrium return on the foreign exchange market the pure expectations hypothesis the modern theory and tentative formulations of return as a function of risk the alternative joint hypotheses are rejected by the data but this does not necessarily imply the rejection of emit the rejection may be due to the inadequacies of the equilibrium return models used notwithstanding the fact that the risk premium has been captured to a certain extent in the empirical tests and the evidence against the emit weakened

pumped storage project a short to long term investment analysis including climate change abstract new renewable energy needs flexibility which can be provided by storage hydropower climate change affects the potential of this technology in both a negative and a positive way on one hand by altering runoff and on the other hand by creating new investment opportunity this paper provides an economic and financial analysis of a future project in a pumped storage facility that may be initiated in the swiss alps following the glacier retreat the area released may be considered for building a new reservoir a complete and integrated model is developed based on the tools of analysis provided by econometrics finance and operational research the results show that under the present market conditions such an investment is not profitable unexpectedly the sensitivity analysis shows that most of the time higher price volatility reduces annual revenue furthermore the project s lifetime only has a marginal impact on the net present value the value of the concession which is the right to use water is also assessed on the basis of a real option analysis including a long term horizon its present value is substantial even if the project is currently unprofitable in the discussion we go beyond the swiss case study and highlight the implications for energy policy and market design

real option valuation in renewable energy literature research focus trends and design abstract in light of intensive development of the renewable energy re sector a growing number of academic papers address the complexity of re investment planning and valuation to take account of the high risk profile and irreversibility of re investments researchers have resorted to sophisticated real options ro approaches that enable flexibility to be incorporated into project design in the face of an uncertain environment the variety of different frameworks and models adopted as well as a lack of aggregated analysis of the field suggest a need for a critical review of ro methodology and design in re assessment this study describes the research focus trends and design found in contemporary academic literature devoted to re valuation with a ro approach particular attention is given to ro in project and policy design the results give a comprehensive picture of existing research on the topic thus providing researchers with a solid foundation for further study and indications of directions for future development furthermore the findings provide policymakers and project planners with valuable insights into key aspects of re project and policy design

foreign exchange market efficiency tests implications of recent empirical findings abstract the recent empirical literature on the efficiency of the foreign exchange market has been characterized by strikingly contradictory conclusions drawn from similar empirical evidence these contradictions result because 1 different maintained hypotheses are held and 2 different criteria e g micro versus macroeconomic are used to judge the evidence in this survey we organize the empirical literature under several headings the presence of risk premiums empirical regularities in regression tests profitable trading rules and advanced econometric techniques in integrating this material we consider the implications of the current evidence for investors forecasters policy makers and theorists

the u s budget and trade deficits a simultaneous equation model the large and apparently persistent u s trade deficit has sparked a considerable amount of research into its determinants and the proper policy responses at least two key questions can be identified in this context a general one and a more specific one first to what extent can the trade deficit be explained by changes in macroeconomic fundamentals as opposed to microeconomic explanations such as quality deterioration of u s goods and the like second to what extent and through which channels does the federal budget deficit affect the trade deficit if at all most recent macroeconomic studies on the u s trade deficit have focused on mono causal

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