cross country variation in the liquidity effect the role of financial markets this paper examines cross country variation in the liquidity effect the negative response of interest rates to money supply shocks focusing on the role of financial factors in explaining this variation we estimate the liquidity effect for each of 21 countries using var models in which money supply shocks are restricted to be neutral in the long run then regress the estimated liquidity effect on financial market variables across countries we find that financial factors play an important role in determining the magnitude of the liquidity effect and that this evidence is most consistent with generalised versions of limited participation models

the ethics of intergenerational distribution reply and response to john e roemer recent concerns among economists over global climate change have given rise to an uneven literature on intergenerational welfare economics environmental resource economics in its march 2011 issue published a paper by the political philosopher john e roemer that contains not only errors of interpretation of what others have written but also misunderstandings of settled matters i respond and reply to roemer by re exploring the foundations of intergenerational welfare economics i show that ethical pluralism gives rise to a very different framework for thinking about the subject than the one roemer presents in his paper moreover his dismissal of much of what welfare economists write on such concepts as social discount rates has as its source an utterly narrow view of the contexts in which economic evaluation is undertaken in the contemporary world

are optimal emissions really optimal four critical issues for economists in the greenhouse although the greenhouse effect is by many considered as one of the most serious environmental problems several economic studies of the greenhouse effect most notably nordhaus s dice model suggest that it is optimal to allow the emissions of greenhouse gases ghg to increase by a factor of three over the next century other studies have found that substantial reductions can be justified on economic grounds this paper explores into the reasons for these differences and identifies four partly overlapping crucial issues that have to be dealt with when analysing the economics of the greenhouse effect low probability but catastrophic events cost evaluation methods the choice of discount rate the choice of decision criterion the paper shows that i these aspects are crucial for the policy conclusions drawn from models of the economics of climate change and that ii ethical choices have to be made for each of these issues this fact needs wider recognition since economics is very often perceived as a value neutral tool that can be used to provide policy makers with optimal policies

the ethics of intertemporal distribution in a warming planet this paper evaluates from the ethical viewpoint current work by economists on intergenerational resource allocation in the presence of global warming we begin by attempting to elucidate the debate that has recently occurred on the appropriate choice of the discountrate weofferthreejustificationsformaximizingthediscountedsumofgenerational utilities and find only one of these to be a satisfactory justification of that practice the pos sibility that the human species may become extinct this implies that a very small discount rate large discount factor should be used we argue that the justification for discounting inherent in the approaches taken by many economists is that of the present generation of hegemon which is unacceptable the role of the ramsey equation in deducing the discount rate in these theories is explained as an alternative to discounted utilitarianism we propose a principle of sustainability we describe optimal paths that have been calculated for the sus tainabilitiarian rawlsian objectivefunction andpathsthatwillsustaingrowthinwelfare at a positive rate we report results concerning optimal paths when the uncertainty of existence of future generations is taken into account in sharp contrast to the utilitarian model it turns out that under some conditions the sustainabilitarian can ignore the uncertainty regarding thedateatwhichhumansbecomeextinct thereisastrikingdifferencebetweenthesolutions of the discounted utilitarian program and the sustainabilitarian program under uncertainty

new evidence on the puzzles results from agnostic identification on monetary policy and exchange rates abstract past empirical research on monetary policy in open economies has found evidence of the delayed overshooting puzzle and the forward discount puzzle we revisit the effects of monetary policy on exchange rates by applying uhlig s uhlig h 2005a what are the effects of monetary policy on output results from an agnostic identification procedure journal of monetary economics 52 2 381 419 identification procedure that involves sign restrictions on the impulse responses of selected variables in a first step we leave the response of the exchange rate agnostically open and find sizeable evidence for both puzzles in a second step we additionally rule out the delayed overshooting by construction our results indicate that the forward discount puzzle is robust even without delayed overshooting

the emu and the control of inflation proposals have been made for the institution of a european central bank or similar institution to conduct an independent monetary policy in terms of a single european currency with the exclusive purpose of controlling the rate of price inflation budgetary policies being left largely in the hands of national fiscal authorities it is suggested in this note that such a divorce between a central monetary policy for the control of inflation and a set of national fiscal policies for the control of budget balances could lead to an unstable outcome the conditions in which such instability may occur are examined a more general case is made for not divorcing monetary policy from fiscal policy and various methods of dealing with this problem are discussed copyright 1990 by oxford university press

the damage costs of climate change a note on tangibles and intangibles applied to dice economic cost benefit analysis of the costs of greenhouse gas emission abatement and climate change often points towards limited abatement this note elucidates one reason why this result is obtained the way in which the intangible damages are treated and the utility function is specified on the basis of the dice model it is shown that by putting the intangible damages directly into the utility function and by assuming them to grow with per capita income the optimal reduction increases and in the second case more than triples compared to nordhaus s original results

interpreting the macroeconomic time series facts the effects of monetary policy existing theory and evidence on the effects of monetary policy are reviewed substantial room for disagreement among economists remains new evidence based on multivariate time series studies of several countries is presented while certain patterns in the data consistent with effective monetary policy are strikingly similar across countries others particularly the tendency of interest rate increases to predict high inflation are harder to reconcile with effective monetary policy

how to decide when experts disagree uncertainty based choice rules in environmental policy environmental economists have traditionally addressed the issue of choice under uncertainty by applying the expected utility hypothesis when policymakers face a panel of experts with widely divergent beliefs the problem may more accurately be described as a case of choice under pure uncertainty arrow and hurwicz 1972 demonstrate that rational choice criteria under pure uncertainty will focus on the extremes of the state space not the midpoint as is typically assumed using nordhaus s dice model uncertainty based choices about global warming policies are evaluated linkages to the safe minimum standard and the precautionary principle are also discussed

shifts in monetary policy and exchange rate dynamics is dornbusch s overshooting hypothesis intact after all abstract how do nominal exchange rates adjust after surprise contractions in monetary policy while the seminal contribution by dornbusch provides concise predictions exchange rates appreciate i e overshoot on impact before depreciating gradually empirical support for his hypothesis is at best mixed i argue that the failure to discover overshooting may result from assumptions researchers have imposed to recover structural vars specifically simultaneous feedback effects between interest rates and exchange rates which are inherently forward looking variables are often excluded or modeled alongside with strong restrictions in this paper i identify u s monetary policy shocks using surprises in federal funds futures around policy announcements as external instruments which recent literature has established to represent the appropriate laboratory in settings encompassing macroeconomic and financial variables resulting adjustments of the dollar conditional on shifts in policy generally align with dornbusch s predictions during the post bretton woods era including volcker s tenure as fed chair

forward discount puzzle and liquidity effects some evidence from exchange rates among the united states canada and japan this paper empirically examines whether the interaction between foreign exchange markets and monetary markets can help to resolve the forward discount puzzle following the monetary models of lucas 1990 and fuerst 1992 we define as liquidity effects the negative impact of monetary injection on nominal interest rates temporary deviations from the standard euler equation the liquidity effect identified by these models weakens the linkage between current forward rates and expected future spot rates and improves on the standard rational expectations model that predicts a one to one correspondence between the two using time series of exchange rates among the united states canada and japan this paper shows that the liquidity measure identified above has an impact on forward premiums and that once the liquidity effect is taken into consideration the unbiased prediction of the forward discount rate is recovered to some extent in a theoretically consistent manner

liquidity loanable funds and real activity abstract this paper develops a general equilibrium model of two traditional explanations of the monetary black box linking money and real activity the liquidity effect and the loanable funds effect these effects are modeled with a monetary production economy in which central bank injections of cash are funnelled into the economy through the credit market since only borrowers have direct access to the newly injected cash monetary injections cause nominal interest rates to fall if firms are borrowers then monetary injections also increase current and future real activity

sustainability as intergenerational fairness efficiency uncertainty and numerical methods this paper presents an economic model of sustainability defined as intergenerational fairness assuming that intergenerational fairness is an obligation of each generation a recursive optimization problem is obtained the problem has the advantage that uncertainty can readily be incorporated in the model and it can be solved numerically for a wide range of specifications the possibility of trade offs between efficiency and sustainability are discussed under plausible conditions it is shown that a sustainability obligation is met only if there is the expectation of economic growth

real and nominal effects of central bank monetary policy abstract we examine the impact of monetary policy using israeli data on nominal and indexed bonds which allow us to decompose nominal interest rates into inflation expectations and ex ante real interest rates we find that a monetary policy shock introduced by raising the overnight rate the bank of israel charges member banks raises real interest rates but lowers inflation expectations long term real interest rates are less impacted than short term rates lastly monetary shocks affect the exchange rate between the israeli currency and the us dollar our estimates are robust to numerous modifications to the basic var model

scientific progress and irreversibility an economic interpretation of the precautionary principle abstract we consider the problem of the optimal use of a good whose consumption can produce damages in the future scientific progress is made over time that provides information on the distribution of the intensity of damages we show that this progress induces earlier prevention effort only if prudence is larger than twice absolute risk aversion this paper thus identifies the class of quite restrictive but plausible conditions such that scientific uncertainties justify an immediate reduction of the consumption of a potentially toxic substance

specifications of social welfare in economic studies of climate policy overview of criteria and related policy insights an important assumption in economic studies of climate policy is the social welfare function this paper shows that applying distinct decision or social welfare criteria can result in different optimal policies of climate control notably if climate change impacts are uncertain first decision criteria in current climate economic studies are reviewed next the most important alternatives are discussed including their mathematical formalization and incorporation in economy climate models most of these alternative criteria suggest more stringent climate policies to be optimal than the standard discounted utilitarianism approach however several important welfare criteria have not or hardly seen any application in the economic analysis of climate policy we conclude that there is clear need for systematic research on this theme for which the current review provides a solid basis

were there regime switches in u s monetary policy working paper 2004 14 june 2004 abstract a multivariate model identifying monetary policy and allowing for simultaneity and regime switching in coefficients and variances is confronted with u s data since 1959 the best fit is with a model that allows time variation in structural disturbance variances only among models that also allow for changes in equation coefficients the best fit is for a model that allows coefficients to change only in the monetary policy rule that model allows switching among three main regimes and one rarely and briefly occurring regime the three main regimes correspond roughly to periods when most observers believe that monetary policy actually differed and the differences in policy behavior are substantively interesting though statistically ill determined the estimates imply monetary targeting was central in the early 80s but was also important sporadically in the 70s the changes in regime were essential neither to the rise in inflation in the 70s nor to its decline in the 80s jel classification e52 e47 c53 key words counterfactuals lucas critique policy rule monetary targeting simultaneity volatility model comparison i the debate over monetary policy change in an influential paper clarida gali and gertler 2000 cgg presented evidence that us monetary policy changed between the 1970 s and the 1980 s indeed that in the 70 s it was drastically worse they found that the policy rule apparently followed in the 70 s was one that when embedded in most stochastic general equilibrium models would imply non uniqueness of the equilibrium and hence vulnerability of the economy to sunspot fluctuations of arbitrarily large size their estimated policy rule for the later period on the other hand eliminated this indeterminacy these results are a possible explanation of the volatile and rising inflation of the 70 s and of its subsequent decline the cgg analysis has two important weaknesses one is that it fails to account for stochastic volatility us macroeconomic variables and particularly the federal funds rate have gone through periods of tranquility and of agitation with forecast error variances varying greatly from period to period ignoring such variation does not lead to inconsistent estimates of model parameters when the forecasting equations themselves are constant but it strongly biases toward a finding of changed parameters tests of the stability of the forecasting equations the other weakness is that the cgg analysis rests on powerful and implausible identifying assumptions they require that we accept that the response of the monetary authority to expected future inflation and output does not depend on the recent history of inflation money growth or output it is hard to understand why this should be so especially in the 70 s when monetarism was a prominent theme in policy debates congress was requiring reports from the fed of projected time paths of monetary aggregates and financial markets were reacting sensitively to weekly money supply numbers the requirement for existence and uniqueness of equilibrium in dynamic models is that the monetary policy rule show a more than unit response of interest rates to the sum of the logs of all nominal variables that appear on the right hand side of the reaction function if we force a particular measure of expected future inflation to proxy for all the nominal variables that actually appear independently in the reaction function we are bound to get distorted conclusions on the one hand because expected future inflation will be a noisy measure of the full set of nominal influences on policy we might get downward bias in our estimates from the usual errorsin variables effect on the other hand to the extent that expected future inflation like most expected future values shows less variation than current nominal variables we could find a mistaken scaling up of coefficients

choice under partial uncertainty this paper analyzes problems of choice under uncertainty where a decisionmaker does not use subjective probabilities the decisionmaker has a set of beliefs about which states are more likely than others but his beliefs cannot be represented as subjective probabilities three main kinds of decision rules are possible in this framework these are maximin type maximax type and choosing that action that gives the highest payoff in the state which the decisionmaker believes to be most likely the author replaces the commonly used merger of states axiom with a version of the sure thing principle copyright 1993 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

forward looking information in var models and the price puzzle abstract with a view to addressing the major disadvantage of the var model namely the inadequate description of the central bank reaction function we propose a var specification that proves successful in solving the price puzzle featuring in monetary vars for the us this specification consists in augmenting a standard var with two forward looking variables the federal funds futures rate or alternatively a money market forward rate reflecting monetary policy expectations and a composite leading indicator of economic activity these two variables appear to effectively control for the information set that the federal reserve may use in monetary policy decision making with this modification theory consistent responses to monetary policy shocks are obtained

rules and discretion with noncoordinated monetary and fiscal policies the time inconsistency of optimal monetary policy is due to the effects of tax distortions thus the issue of how to improve upon the time consistent suboptimal monetary policy is related to that of the coordination of monetary and fiscal policy we present a model with three players the central bark the fiscal authority and wage setters in which distortionary taxes are explicitly modelled we show that binding commitments to monetary rules are not necessarily welfare improving if monetary and fiscal policy are not coordinated we also examine the effects of different degrees of independence of the central bank

monetary union and the assignment problem proposals for the creation of an independent central bank in a european monetary union do not always take into account the interactions between monetary and fiscal policy this analysis describes a system of two similar economies forming either a joint fiscal and monetary union or a simple monetary union policy authorities aim to achieve target values for inflation and the budget balance if the monetary and fiscal authorities pursue their targets independently of each other there is a risk that unstable interactions will be set up the results indicate a hazard of the separation of monetary and fiscal management

the dynamic eects of monetary policy a structural factor model approach we use the structural factor model proposed by forni giannone lippi and reichlin 2007 to study the eects of monetary policy the advantage with respect to the traditional vector autoregression model is that we can exploit information from a large data set made up of 112 us monthly macroeconomic series monetary policy shocks are identified using a standard recursive scheme in which the impact eects

intertemporal distribution sufficiency and the social cost of carbon abstract we explore how the intertemporal distribution of well being affects the social cost of carbon in contrast to the literature that studies parameters of a particular social welfare function such as the discount rate we shift the focus and directly assume a parametric form for the intertemporal distribution of well being this has the advantage of avoiding explicit discounting choices which has initiated much debate specifically we consider a set of intertemporal distributions that reach a steady state at a pre specified level of sufficient well being or equivalently after a pre specified end of growth horizon we numerically illustrate our results in dice and find that the social cost of carbon increases over proportionally with the sufficiency level of well being while the social cost of carbon in 2015 is us 7 if the sufficiency level is four fold the present level it is us 30 if the sufficiency level is 15 fold and us 100 if the sufficiency level is 26 fold the present level this shows in a transparent way how conceptions of intergenerational distributive justice drive the social cost of carbon

a cost benefit analysis of slowing climate change there are many conflicting views regarding the true dimensions of the climate change problem often these viewpoints are based on different estimates of key parameters with little indication as to why parameter estimates vary so much and which ones might be the more reliable the prospects for a co ordinated strategy to tackle climate change appear dim little consensus has emerged for example regarding the costs of abating carbon emissions some take the view that considerable improvements in energy efficiency are available at negative cost by setting minimum efficiency standards for vehicles and domestic appliances e g mills et al 1991 others regard the macroeconomic costs of even small reductions in carbon emissions as substantial manne and richels 1993 in the judgement of other researchers a proportion of carbon emissions arise purely as a result of institutional failings either at a regional level in the subsidies paid to fossil fuel energy producers in the erroneous belief that this promotes economic growth shah and larsen 1994 in failure to deal with air pollution glomsrod et al 1992 and vehicle congestion in urban areas hughes 1994 or at a global level in failing to make appropriate transfers to those countries whose forests contain rich biodiversity which we would wish to preserve pearce 1991

on the economics of renewable energy sources abstract with the global expansion of renewable energy re technologies the provision of optimal re policy packages becomes an important task we review pivotal aspects regarding the economics of renewables that are relevant to the design of an optimal re policy many of which are to date unresolved we do so from three interrelated perspectives that a meaningful public policy framework for inquiry must take into account first we explore different social objectives justifying the deployment of re technologies and review model based estimates of the economic potential of re technologies i e their socially optimal deployment level second we address pivotal market failures that arise in the course of implementing the economic potential of re sources in decentralized markets third we discuss multiple policy instruments curing these market failures our framework reveals the requirements for an assessment of the relevant options for real world decision makers in the field of re policies this review makes it clear that there are remaining white areas on the knowledge map concerning consistent and socially optimal re policies

the analytics of svars a unified framework to measure fiscal multipliers ticities implied by the identification schemes generate a large dispersion in the estimates of tax and spending multipliers second i estimate fiscal multipliers consistent with prior distributions of the elasticities computed by a variety of empirical strategies and by employing a simple dynamic stochastic general equilibrium model i document three findings for the u s for the period 1947 2010 first the impact tax multiplier is close to 0 second the impact spending multiplier ranges between 0 35 and 1 third there is a large uncertainty in the estimates of fiscal multipliers at longer horizons yet the probability that the spending multiplier is larger than the tax multiplier is above 0 65 for up to three years after policy interventions

a structural bayesian var for model based fan charts inflation forecast uncertainty is of importance for a wide range of agents in the economy central banks in particular ways to describe and account for this uncertainty in a consistent manner have received increasing attention of late in part due to the growing number of inflation targeting central banks this article develops a large structural var for the swedish economy and estimates it in a bayesian framework the methodology permits not only structural interpretation and analysis but offers a natural way to formalize forecast uncertainty as the posterior predictive density from the model has the interpretation of a fan chart

delayed overshooting is it an 80s puzzle we reinvestigate the delayed overshooting puzzle using a method of sign restrictions we find that delayed overshooting is primarily a phenomenon of the 1980s when the fed was under the chairmanship of paul volcker related findings are as follows 1 uncovered interest parity fails to hold during the volcker era and tends to hold during the post volcker era 2 us monetary policy shocks have substantial impacts on exchange rate variations but misleadingly appear to have small impacts when monetary policy regimes are pooled in brief we confirm dornbusch s overshooting hypothesis

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

fiscal and monetary policy co ordination a differential game approach in this paper the interaction between the treasury and the central bank is examined in the case of both cooperative and non cooperative behaviour differential games are used in the framework of a continuous time econometric model of the italian economy the nash and the stackelberg non cooperative equilibrium solutions are computed and the case for cooperation is analysed by considering the nash and the kalai smorodinsky bargaining models it is shown that in the italian case the government has a stronger bargaining position than the central bank a comparison is then made between the different solutions to show that the drawbacks that emerge from non cooperation are not simply those depending on the players payoffs other features are in fact considered which constitute a further argument for policy co ordination

an overlapping generations model of climate economy interactions a numerically calibrated overlapping generations model of climate change and the world economy is examined in this paper in the absence of intergenerational transfers efficient rates of greenhouse gas emissions abatement rise from 16 in the present to 25 in the long run while mean global temperature increases by 7 40c relative to the preindustrial norm a utilitarian optimum which attaches equal weight to each generation s life cycle utility yields abatement rates that rise from 48 to 89 with a long run temperature increase of 3 40c a second best utilitarian path in which intergenerational transfers are by assumption institutionally infeasible also supports stringent abatement measures i introduction the infinitely lived agent framework pioneered by frank ramsey 1928 has emerged as a central structure in the economics of climate change as characterized by ipcc 1996 working group iii climate change occurs when anthropogenic emissions of greenhouse gases principally carbon dioxide but also chlorofluorocarbons methane nitrous oxide and water vapor contribute to long term increases in mean global temperature potentially disrupting ecological systems and climate dependent production activities the best known study on the economics of this subject is nordhaus 1994 dynamic model of climate and the economy dice which incorporates assumptions regarding the costs and benefits of greenhouse gas emissions in a standard one sector growth model in nordhaus analysis a 50 reduction in greenhouse gas emissions would reduce gross world output by 0 93 a doubling of greenhouse gas concentrations relative to the preindustrial norm which is expected to occur by the middle of the twenty first century would reduce output by

information from financial markets and var measures of monetary policy exogenous measures of monetary policy shocks directly derived from nancial market information are used in close us and open us germany economy var models to evaluate the robustness of the dynamic e ect of monetary policy obtained from traditional identi ed var the empirical analysis con rms the main features of the monetary policy transmission mechanism in us and germany explicitly addressing the issue of simultaneity between the german policy interest rate and the us dollar dmark exchange rate 1999 elsevier science b v all rights reserved jel classixcation e44 e52 f41

the impact of changes in monetary aggregates on exchange rate volatility in a developing country do structural breaks matter theoretical models of exchange rate determination predict that increases in monetary aggregates lead to depreciation however several empirical studies do find exchange rate response anomalies to innovations in monetary policy in this paper we show that accounting for major structural break points in monetary variables leads to empirical results that are statistically consistent with predictions from theoretical monetary models of exchange rate determination

epstein zin utility in dice is risk aversion irrelevant to climate policy climate change involves uncertain probabilities of catastrophic risks and very longterm consequences of current actions climate economics therefore is centrally concerned with the treatment of risk and time yet conventional assumptions about utility and optimal economic growth create a perverse connection between risk aversion and time preference such that more aversion to current risks implies less concern for future outcomes and vice versa the same conflation of risk aversion and time preference leads to the equity premium puzzle in finance a promising response to the equity premium puzzle the recursive utility of epstein and zin allows separation of risk aversion and time preference at the cost of considerable analytic complexity we introduce an accessible implementation of epstein zin utility into the dice model of climate economics creating a hybrid ez dice model using epstein zin parameters from the finance literature and climate uncertainty parameters from the science literature we find that the optimal climate policy in ez dice calls for rapid abatement of carbon emissions it is similar to standard dice results with the discount rate set to equal the risk free rate of return ez dice solutions are sensitive to the intertemporal elasticity of substitution but remarkably insensitive to risk aversion insensitivity to risk aversion may reflect the difficulty of modeling catastrophic risks within dice implicit in dice are strong assumptions about the cost of climate stabilization and the certainty and speed of success under these assumptions risk aversion would in fact be unimportant a more realistic analysis will require a subtler treatment of catastrophic climate risk

justifying social discounting the rank discounted utilitarian approach the popular discounted utilitarian criterion for infinite horizon social choice has been criticized on the ground that it treats successive generations unfairly i propose to evaluate intergenerational welfare with a rank discounted utilitarian rdu criterion instead the criterion amounts to discounted utilitarianism on non decreasing paths but it treats all generations impartially discounting becomes the mere expression of intergenerational inequality aversion i show that more inequality averse rdu societies have higher social discount rates when future generations are better off i apply the rdu approach in two benchmark economic growth models and i prove that it promotes sustainable policies maximizing discounted utility

how resilient is the german banking system to macroeconomic shocks abstract macroeconomic stress testing studies often rely on rather short sample periods due to the limited availability of banking data they may fail to appropriately account for the cyclicality in the interaction between the banking system and macroeconomic developments in this paper we use a newly constructed data set on german banks income and loss statements over the past 39 years to model the interaction between the banking sector and the macroeconomy our var analysis indicates that the level of stress in the banking sector is strongly affected by monetary policy shocks the results rationalize the active behavior of central banks observed during periods of financial market crises

intergenerational equity discounting and the role of cost benefit analysis in evaluating global climate policy when public policies with impacts far into the future are being debated the question inevitably is raised whether cost benefit analysis which discounts future costs and benefits is not biased against future generations and whether if such discounting is appropriate at all a lower rate should be used to avoid such bias the debate on global climate change is no exception this paper sketches and analyses the welfare foundations of cost benefit analysis and from this perspective analyses the role of cost benefit analysis in the climate policy debate particularly with reference to intergenerational effects the paper concludes that the cost benefit criterion cannot provide a definitive basis for deciding whether we should commit to a longer term programme to moderate climate change the issues of intergenerational equity are not that global climate change will significantly lower the gnp of future generations but relate to the possibility of science fiction like changes in the planet that will produce catastrophic effects in the future and the typical way in which the cost benefit problem is posed obscures the basic choices that we should be evaluating

monetary shocks in the g 6 countries is there a puzzle les auteurs cherchent a clarifier la dynamique du mecanisme de transmission de la politique monetaire l identification des chocs de politique monetaire est au coeur de ce genre d analyse divers chercheurs ont reussi recemment a isoler de tels chocs en imposant des restrictions de suridentification a des modeles vectoriels autoregressifs var

financial deepening and economic growth the core of shapley shubik games and general equilibrium models with a venn diagram is applied for a theory on the role of real finance in economic growth among advanced economies then the dynamic computable general equilibrium dcge models for germany france the uk japan and the usa are constructed to assess the validity of the over financing hypothesis that has reappeared after the financial crisis of 2008 actual financial deepening ratios observed in the nonconsolidated balance sheet of the oecd exceeded by factors of 3 5 2 4 5 1 11 6 and 4 8 than the optimal financial deepening ratios implied by dcge models respectively in these countries because of excessive leveraging and bubbles up to 19 times of gdp which were responsible for this great recession containing such massive fluctuations for macroeconomic stability and growth in these economies are not possible in conventional fiscal and monetary policy models and require a dcge analysis like this along with adoption of separating equilibri

a regional dynamic general equilibrium model of alternative climate change strategies outcomes and noncooperative equilibria this study finds that cooperative policies show much higher levels of emissions reductions than do noncooperative strategies that there are substantial differences in the levels of controls in both the cooperative and the noncooperative policies among different countries and that high income countries may be the major losers from cooperation jel h41 q4 q2 q20

the effect of discounting on policy choices in inflation targeting regimes very similar for a wide range of preferences of the monetary authority with respect to inflation and output stability we show that when the authority discounts the future outcomes become more sensitive to its preferences and that it is important to take the discount rate into account when examining the question of how the authority s remit should be specified this article addresses a significant result concerning the current uk monetary arrangements derived by bean 1998 he first argues that these arrangements are likely to ensure that the monetary policy committee does not target excess output and so does not face a credibility problem the main result of bean s paper is that if there is no credibility problem the variances of inflation and output obtained by a policy maker are largely independent of its preferences as a result it does not matter that the inflation remit does not specify the relative weight that the bank of england should place on output volatility vis a vis inflation volatility this finding is obtained under the assumption that the authority does not discount the future the purpose of the present article is to show that bean s result is not robust to the relaxation of this assumption with discounting policy outcomes do depend significantly on policy maker preferences the article also shows that this effect of discounting remains true when bean s model is extended to include both forward looking behaviour and effects of exchange rate changes in an open economy in practice current arrangements do little to ensure that planning horizons are long in the uk members of the monetary policy committee are appointed for a term of three years and so the average remaining term of existing members is one and a half years

mexico and the brady plan mexico has throughout the 1980s been centre stage in the debates and events shaping the sovereign debt problem caught between a sudden collapse of its terms of trade and rising world interest rates mexico suspended debt service payments in august 1982 and ushered in what has since become known as the debt crisis in the following years lending to ldcs dried up and debtor countries were increasingly forced to run high trade surpluses to effect ever growing transfers from poor back to rich countries in the face of falling growth rates and rising inflation in the high debt countries then secretary of the treasury baker proposed the baker plan in return for economic reforms high debt countries would get new access to medium term new loans in addition to rolling over of amortization of old loans new loans had to come both from commercial creditors and the official lending institutions with access to capital markets restored the economic reforms would it was hoped allow the debtors to grow out of debt but experience in the high debt countries showed that the original hopes of the proponents of the baker plan went unfulfilled net transfers out of the borrowing countries went up rather than down as

declining discount rates in this paper we ask whether the us government should replace its current discounting practices with a declining discount rate schedule as the united kingdom and france have done or continue to discount the future at a constant exponential rate to address the question we briefly present the theoretical basis for a declining discount rate ddr schedule and focus on how in practice a ddr could be estimated for use by policy analysts we discuss the empirical approaches in the literature and review how the united kingdom and france estimated their ddr schedules we conclude with advice on how the united states might proceed to consider modifying its current discounting practices i the expected net present value approach to ddrs

are there reasons against open ended research into solar radiation management a model of intergenerational decision making under uncertainty solar radiation management srm has been proposed as a means of last resort against dangerous climate change we propose a stylized model of intergenerational decision making on srm research greenhouse gas abatement and srm deployment under uncertainties about a the extent of future climate damage and b effectiveness and potential harmful side effects of srm open ended research may reveal either that srm effectively reduces climate damage or that it would cause more harm than benefits we find that srm research increases the likelihood of deployment slippery slope and derive conditions that it decreases abatement effort in expectation moral hazard neither of these provides a rationale against srm research though the rational decision is to perform srm research unless i discounting is hyperbolic and ii the absolute prudence of expected climate damage is smaller than absolute risk aversion these results generalize to the case where srm research also provides information on climate sensitivity

some empirical evidence on the effects of shocks to monetary policy on exchange rates this paper investigates the effects of shocks to u s monetary policy on exchange rates we consider three measures of these shocks orthogonalized shocks to the federal funds rate orthogonalized shocks to the ratio of nonborrowed to total reserves and changes in the romer and romer index of monetary policy in sharp contrast to the literature we find substantial evidence of a link between monetary policy and exchange rates specifically according to our results a contractionary shock to u s monetary policy leads to i persistent significant appreciations in u s nominal and real exchange rates and ii significant persistent deviations from uncovered interest rate parity in favor of u s interest rates

real exchange rate volatility and economic openness theory and evidence this paper relates the volatility of the trade weighted effective real exchange rate to the degree of trade openness of an economy the theoretical part presents an intertemporal monetary model of a small open economy with nominal rigidities both monetary and aggregate supply shocks are shown to produce ceteris paribus smaller real exchange rate movements if the country is more open to foreign trade empirical evidence on a cross section of forty eight countries confirms this relationship differences in trade openness explain a large part of the cross country variation in the volatility of the effective real exchange rate

cross country evidence on the relation between stock prices and the current account this article explores the relation between stock prices and the current account for 17 organization for economic co operation and development oecd countries in 1980 2007 a panel vector autoregressive var model is used to compare the effects of stock price shocks to those originating from monetary policy and exchange rates while monetary policy shocks have little effects shocks to stock prices and exchange rates have sizeable effects a 10 contraction in stock prices improves the current account by 0 3 after 2 years hence a channel in addition to the traditional exchange rate channel is found through which external balance for an oecd country with a current account imbalance can be restored

liquidity and exchange rates abstract we present a two country extension of lucas s 1988a work on cash in advance constraints in asset markets in the model there is temporary separation between the goods and asset markets and money is used for transactions in both we first find that the exchange rate level depends on the share of money used for asset transactions a greater share appreciates the currency second stochastic open market operations increasing the domestic bonds supply appreciate the domestic currency third the liquidity effects of bond supply shocks cause an excess volatility of nominal exchange rates even when their fundamental value is constant

testing for indeterminacy an application to u s monetary policy reply this paper considers a prototypical new keynesian model in which the equilibrium is undetermined if monetary policy is passive the likelihood based estimation of dynamic equilibrium models is extended to allow for indeterminacies and sunspot fluctuations we construct posterior weights for the determinacy and indeterminacy region of the parameter space and estimates for the propagation of fundamental and sunspot shocks according to the estimated model u s monetary policy post 1982 is consistent with determinacy whereas the pre volcker policy is not we find that before 1979 indeterminacy substantially altered the propagation of shocks

fundamental irreversibilities in stock externalities abstract this paper concerns the irreversibility effect in stock externalities in an environment of uncertainty with learning taking place one may wish to under emit today to avoid potential environmental irreversibilities alternatively one may wish to under invest in pollution control capital avoiding investments in sunk capital that turn out to be wasted the paper develops theoretical results on the tension between these two effects and separates risk aversion from the irreversibility effect the paper also presents a simple example in climate change policy

the world is not enough small open economies and regional dependence in this paper we explicitly introduce regional factors into a global dynamic factor model we combine new open economy factor models emphasizing global shocks with the recent findings of regional importance in the business cycle synchronization literature the analysis is applied to a large panel of domestic data for four small open economies we find that global and regional shocks explain roughly 30 and 20 percent respectively of the business cycle variation in all countries while global shocks have most impact on trade variables regional shocks explain a relatively large share of the variation in cost variables

the new uk monetary arrangements a view from the literature this paper considers the likely operating characteristics of the new uk monetary arrangements introduced in may 1997 the paper first argues that the time inconsistency of policy is not an issue provided the bank of england is properly independent however the current inflation remit from the chancellor to the bank specifies a numerical target for the inflation rate but does not specify how quickly deviations from the target are to be corrected it is thus an incomplete contract and there is a danger that the bank may choose to stabilise inflation at the cost of excessively volatile movements in output or vice versa we estimate the optimal policy frontier for the uk economy and show that in practice it is close to rectangular consequently all the bank needs to assume is that the government s preferences are reasonable in order to know approximately where to locate on this frontier the incompleteness of the remit therefore need not be a cause for concern

the european central bank independence accountability and strategy a review this paper reviews research on central banking and monetary policy with special emphasis on the position of the future european central bank nowadays it is often thought that an independent central bank with an explicit mandate to aim for price stability constitutes an important institutional device to assure price stability indeed the ecb will be one of the most independent central banks as follows from the codings of various indicators measuring legal independence still it does not follow straightforwardly from the literature that the statute of the ecb is optimal it is also argued that the accountability of the ecb is poorly arranged for in comparison with that of several national central banks finally the discussion about the monetary strategy of the ecb is reviewed

designing climate mitigation policy this us paper provides an exhaustive review of critical issues in the design of climate mitigation policy by pulling together key findings and controversies from diverse literatures on mitigation costs damage valuation policy instrument choice technological innovation and international climate policy the authors begin with the broadest issue of how high assessments suggest the near and medium term price on greenhouse gases would need to be both under cost effective stabilization of global climate and under net benefit maximization or pigouvian emissions pricing the remainder of the paper focuses on the appropriate scope of regulation issues in policy instrument choice complementary technology policy and international policy architectures

explaining international comovements of output and asset returns the role of money and nominal rigidities abstract output and asset returns are highly positively correlated across the u s and the remaining major industrialized countries standard business cycle models that assume flexible prices and wages in the real business cycle rbc tradition have great difficulties explaining this fact this paper presents a dynamic optimizing stochastic general equilibrium model of a two country world with sticky nominal prices and wages the structure here generates cross country correlations of output and returns that are markedly higher and hence closer to the data than the cross country correlations that obtain when flexible prices and wages are assumed

inflation targeting is it to blame for banking system instability abstract in light of the financial crisis the practice of inflation targeting it has been blamed for authorities failure to respond to the increase in financial systemic risk and to the development of asset bubbles however utilizing a rich database containing nearly 5500 commercial banks from 70 countries among which 22 are it for the period 1998 2012 this paper argues that on average inflation targeting national banking systems i are more stable ii possess sounder systemically important banks and iii are less distressed than or at least as distressed as other banks during periods of global liquidity shortages our results are robust to a series of tests such as when we compare countries with the same legal origins or control for the delegation of bank supervision responsibility to bodies other than the central bank overall we conclude that it cannot be blamed for contributing to financial fragility

on international equity weights and national decision making on climate change abstract estimates of the marginal damage costs of carbon dioxide emissions require the aggregation of monetised impacts of climate change over people with different incomes and in different jurisdictions implicitly or explicitly such estimates assume a social welfare function and hence a particular attitude towards equity and justice we show that previous approaches to equity weighting are inappropriate from a national decision maker s point of view because domestic impacts are not valued at domestic values we propose four alternatives sovereignty altruism good neighbour and compensation with different views on concern for and liability towards foreigners the four alternatives imply radically different estimates of the social cost of carbon and hence the optimal intensity of climate policy

a dynamic analysis of human welfare in a warming planet anthropogenic greenhouse gas ghg emissions have caused atmospheric concentrations with no precedents in the last half a million years inducing serious uncertainties about future climates and their effects on human welfare recent climate science supports the view that the climate stabilization will require very low ghg emissions in the future we ask is a path of low emissions compatible with sustainable levels of human welfare with steady growth in human quality of life addressing these questions requires both defining welfare criteria and empirically estimating the possible paths of the economy we specify and calibrate a dynamic model with four intertemporal links education physical capital knowledge and the environment in line with nordhaus 2008a and with the stern review 2007 we assume that ghg emissions allow increased production while a higher stock of atmospheric carbon decreases production our index of human welfare which we call quality of life quol emphasizes education knowledge and the environment affected by greenhouse gas emissions in addition to consumption and leisure thus we avoid a consumptionist fallacy that welfare depends only on commodity consumption and perhaps leisure we reject discounted utilitarianism as a normative criterion and consider two alternatives the first is an intergenerational maximin criterion which maximizes the quality of life of the first generation subject to maintaining at least that level for all successive generations the second is human development optimization that seeks the maximization of the quol of the first generation subject to achieving a given constant rate of growth in all subsequent generations hence our analysis focuses on a human notion of sustainability as opposed to the conventional green sustainability limited to keeping the quality of the environment constant because our dynamic optimization programs defy explicit analytical solutions our approach has been computational as a benchmark we consider a simple model with physical and human capital for which we prove a turnpike theorem we then devise a computational algorithm inspired by the turnpike property to construct feasible although not necessarily optimal paths in the more complex and realistic model our analysis indicates that with ghg emission paths entailing very low emissions in the future positive rates of growth in quol are possible while the first generation experiences a quol higher than the historical reference level we also observe a tradeoff between the quality of life of the first generation and the rate of growth in the quality of life yet generation 1 s sacrifice for the sake of a higher growth rate appears to be small the paths that we compute involve investments in knowledge at noticeably higher levels than in the past

global warming endogenous risk and irreversibility this paper develops two period analytical and numerical models to study the question given a stock of greenhouse gases that poses a risk of future damages of unknown magnitude and the possibility of learning about damages how do sunk abatement capital and a nondegradable stock of greenhouse gases affect optimal first period investment we show that both affect investment the former negatively and the latter positively additionally endogenous risk the risk of damages dependent on the stock of gases results in an increase in optimal investment for any level of capital sunkness or greenhouse gas degradability quantitatively the effect of sunk capital is stronger than the effect of greenhouse gas irreversibility or that of endogenous risk

targeting nominal income an appraisal the practice of setting target growth rates for a year or more ahead for some measure of the mofiey supply is now followed by many industrialised countries however it has been suggested by a number of authors e g meade i978 in his nobel prize lecture tobin i980 in his retrospective on stabilisation policy brittan i98i that it would be more sensible to pursue targets for nominal income rather than the money supply meade for instance argues that controlling nominal income is in any case the ultimate goal of those who favour fixed monetary targets and that an excessive concentration on the means rather than the end is confusing to private agents and can lead to undesirable fluctuations in the demand for output when velocity shifts he goes on to advocate that nominal income targets should be linked to the development of wage fixing institutions designed to mimic competitive behaviour in this paper we examine the implications of such a proposal for the performance of the economy in the context of a simple stochastic macroeconomic model under rational expectations a contracting framework is adopted in which the wage is fixed in a state of uncertainty about future levels of demand and productivity the objective of the authorities is to minimise the divergence of output from its full information equilibrium level if labour supply is inelastic then it turns out that maintaining the level of nominal income is actually the optimal policy if labour supply is elastic nominal income targetry provides an optimal response to demand is lm shocks but a suboptimal response to productivity shocks however a sufficient condition for a nominal income target to be preferable to a fixed money supply target is that the price elasticity of aggregate demand be less than unity the paper concludes by examining the implications of pursuing target growth rates rather than levels it should be conceded at the outset that there are several pertinent issues not addressed such as the greater comprehensibility of nominal income targets to private agents or the possibility that nominal income targets may leave the authorities with too much discretion e g poole i980 the issue of labour market reform is also ignored this is an enormous subject which it would be impossible to do justice to here see for instance meade s own analysis of the problem in meade i982 such reforms might be expected to affect the parameters of the model nevertheless since changes in labour market practices are neither a precondition for nor a logical consequence of nominal income targets an independent analysis of the macrceconomic implications of the latter is still highly relevant

monetary policy shocks and foreign investment income evidence from a large bayesian var abstract this paper assesses the transmission of monetary policy in a large bayesian vector autoregression based on the approach proposed by banbura et al 2010 the paper analyzes the impact of monetary policy shocks in the united states and canada not only on a range of domestic aggregates trade flows and exchange rates but also foreign investment income the analysis provides three main results first a surprise monetary policy contraction has a statistically important impact on both gross and net foreign investment income flows in both countries against the background of growing foreign wealth and investment income this result provides preliminary evidence that foreign balance sheet channels might play an increasingly significant role for monetary transmission second the impact of monetary policy on foreign investment income flows differs considerably across asset categories and over time suggesting that the investment instruments and the currency denomination of a country s foreign assets and liabilities are potentially relevant for the way in which monetary policy affects the domestic economy finally the results support existing evidence on the effectiveness of large vector autoregressions and the bayesian shrinkage approach in eliminating price and exchange rate puzzles

testing for identification in svar garch models abstract changes in residual volatility in vector autoregressive var models can be used for identifying structural shocks in a structural var analysis testable conditions are given for full identification for the case where the volatility changes can be modelled by a multivariate garch process formal statistical tests are presented for identification and their small sample properties are investigated via a monte carlo study the tests are applied to investigate the validity of identification conditions in two studies first we test an identifying condition employed in a study of the impact of financial market uncertainty on real activity second we illustrate our tests in the context of an investigation of the effects of u s monetary policy on exchange rates in the first application the identification conditions are confirmed and in the second application they are partly not supported by the data

a review of the stern review on the economics of climate change how much and how fast should we react to the threat of global warming the stern review argues that the damages from climate change are large and that nations should undertake sharp and immediate reductions in greenhouse gas emissions an examination of the review s radical revision of the economics of climate change finds however that it depends decisively on the assumption of a near zero time discount rate combined with a specific utility function the review s unambiguous conclusions about the need for extreme immediate action will not survive the substitution of assumptions that are consistent with today s marketplace real interest rates and savings rates

fluctuations in the foreign exchange market how important are monetary policy shocks abstract we study the effects of u s monetary policy shocks on the bilateral exchange rate between the u s and each of the g7 countries we also estimate deviations from uncovered interest rate parity conditional on these shocks the analysis is based on a structural vector autoregression in which monetary policy shocks are identified through the conditional heteroscedasticity of the structural disturbances unlike earlier work in this area our empirical methodology avoids making arbitrary assumptions about the relevant policy indicator or transmission mechanism in order to achieve identification at the same time it allows us to assess the implications of imposing invalid identifying restrictions our results indicate that the nominal exchange rate exhibits delayed overshooting in response to a monetary expansion depreciating for roughly ten months before starting to appreciate the shock also leads to large and persistent departures from uncovered interest rate parity variance decomposition results indicate that monetary policy shocks account for a non trivial proportion of exchange rate fluctuations

the role of shocks and institutions in the rise of european unemployment the aggregate evidence two key facts about european unemployment must be explained the rise in unemployment since the 1960s and the heterogeneity of individual country experiences while adverse shocks can potentially explain much of the rise in unemployment there is insufficient heterogeneity in these shocks to explain cross country differences alternatively while explanations focusing on labour market institutions explain current heterogeneity well many of these institutions pre date the rise in unemployment based on a panel of institutions and shocks for 20 oecd nations since 1960 we find that the interaction between shocks and institutions is crucial to explaining both stylised facts

learning and stock effects in environmental regulation the case of greenhouse gas emissions abstract this paper concerns the optimal regulation of greenhouse gases that lead to global climate change in particular we focus on uncertainty and learning which over time resolves uncertainty we present an empirical stochastic model of climate economy interactions and present results on the tension between postponing control until more is known vs acting now before irreversible climate change takes place uncertainty in our model is in the damage caused by global warming the results suggest that a temporary carbon tax may dominate a permanent one because a temporary tax may induce increased flexibility

liquidity models in open economies theory and empirical evidence abstract this paper presents an overview of recent theoretical and empirical research on liquidity models in open economies this is a class of optimizing models where money has effects on real asset prices and economic activity without relying on the ad hoc assumption of price wage stickiness the non neutrality of money derives from a temporary segmentation between goods and asset markets after surveying the theoretical literature on liquidity models we present empirical evidence based on var econometric techniques for the seven major industrial countries such evidence is shown to be consistent with the main implications of the liquidity models

the meaning of internal balance thirty years on in his nobel prize lecture meade advocated allocating demand management policies to pursuing price stability reformed wage fixing institutions to achieving full employment and foreign exchange policies to maintaining balance of payments equilibrium but with respect to the first he advocated a target for nominal income rather than the price level i evaluate meade s programme with the benefit of hindsight and in the light of experience with inflation targets i also discuss some of the issues associated with the application of flexible inflation targets as well as the extent to which financial stability considerations should affect the conduct of monetary policy

should central banks respond to movements in asset prices in recent decades asset booms and busts have been important factors in macroeconomic fluctuations in both industrial and developing countries in light of this experience how if at all should central bankers respond to asset price volatility we have addressed this issue in previous work bernanke and gertler 1999 the context of our earlier study was the relatively new but increasingly popular monetary policy framework known as inflation targeting see e g bernanke and frederic mishkin 1997 in an inflation targeting framework publicly announced medium term inflation targets provide a nominal anchor for monetary policy while allowing the central bank some flexibility to help stabilize the real economy in the short run the inflation targeting approach gives a specific answer to the question of how central bankers should respond to asset prices changes in asset prices should affect monetary policy only to the extent that they affect the central bank s forecast of inflation to a first approximation once the predictive content of asset prices for inflation has been accounted for there should be no additional response of monetary policy to assetprice fluctuations in use now for about a decade inflationtargeting has generally performed well in practice however so far this approach has not often been stress tested by large swings in asset prices our earlier research employed simulations of a small calibrated macroeconomic model to examine how an inflation targeting policy defined as one in which the central bank s instrument interest rate responds primarily to changes in expected inflation might fare in the face of a boom and bust cycle in asset prices we found that an aggressive inflationtargeting policy rule in our simulations one in which the coefficient relating the instrument interest rate to expected inflation is 2 0 substantially stabilizes both output and inflation in scenarios in which a bubble in stock prices develops and then collapses as well as in scenarios in which technology shocks drive stock prices intuitively inflation targeting central banks automatically accommodate productivity gains that lift stock prices while offsetting purely speculative increases or decreases in stock values whose primary effects are through aggregate demand conditional on a strong policy response to expected inflation we found little if any additional gains from allowing an independent response of central bank policy to the level of asset prices in our view there are good reasons outside of our formal model to worry about attempts by central banks to influence asset prices including the fact that as history has shown the effects of such attempts on market psychology are dangerously unpredictable hence we concluded that inflationtargeting central banks need not respond to asset prices except insofar as they affect the inflation forecast in the spirit of recent work on robust control the exercises in our earlier paper analyzed the performance of policy rules in worst case discussants robert shiller yale university glenn rudebusch federal reserve bank of san francisco kenneth rogoff harvard university

the response of asset prices to monetary policy shocks stronger than thought standard macroeconomic theory predicts rapid responses of asset prices to monetary policy shocks small scale vector autoregressions vars however often find sluggish and insignificant impact effects using the same high frequency instrument to identify monetary policy shocks we show that a large scale dynamic factor model finds overall stronger and quicker asset price reactions compared to a benchmark var both on euro area and us data our results suggest that incorporating a sufficiently large information set is crucial to estimate monetary policy effects

consistent climate policies what are the optimal climate policies when time preferences deviate from the standard exponential discounting and decision makers cannot commit to future policies we show that with time declining discounting the delay and persistence of climate impacts provide a commitment device to policy makers we quantify the commitment value in a climate economy model by solving time consistent markov equilibrium capital and emission taxes explicitly the returns on capital and climate investments are no longer equal leading to a large increase in the emission tax compared to a benchmark with equalized returns the commitment value increases the tax by a factor of 20 in our quantitative assessment

optimal taxes on fossil fuel in general equilibrium we analyze a dynamic stochastic general equilibrium dsge model with an externality through climate change from using fossil energy our central result is a simple formula for the marginal externality damage of emissions or equivalently for the optimal carbon tax this formula which holds under quite plausible assumptions reveals that the damage is proportional to current gdp with the proportion depending only on three factors i discounting ii the expected damage elasticity how many percent of the output flow is lost from an extra unit of carbon in the atmosphere and iii the structure of carbon depreciation in the atmosphere thus the stochastic values of future output consumption and the atmospheric co2 concentration as well as the paths of technology whether endogenous or exogenous and population and so on all disappear from the formula we find that the optimal tax should be a bit higher than the median or most well known estimates in the literature we also formulate a parsimonious yet comprehensive and easily solved model allowing us to compute the optimal and market paths for the use of different sources of energy and the corresponding climate change we find coal rather than oil to be the main threat to economic welfare largely due to its abundance we also find that the costs of inaction are particularly sensitive to the assumptions regarding the substitutability of different energy sources and technological progress

efficiency sustainability and global warming abstract economic analyses of global warming have typically been grounded in the theory of economic efficiency such analyses may be inappropriate because many of the underlying concerns about climate change are rooted not in efficiency but in the intergenerational allocation of economic endowments a simple economic model is developed which demonstrates that an efficient economy is not necessarily a sustainable economy this result leads directly to questions about the policy relevance of several economic studies of the issue we then consider policy alternatives to address global warming in the context of economies with the dual objectives of efficiency and sustainability with particular attention to carbon based taxes

a re examination of the impacts of macroeconomic and financial shocks on real exchange rate fluctuation evidence from g7 and asian countries this paper aims to investigate the sources of real exchange rate fluctuation by utilizing sign restrictions in structural vector autoregressive svar method under an agnostic identification schem

money debt and deficits in a dynamic game this paper analyzes a dynamic linear quadratic game between the fiscal and monetary authorities the equilibrium outcome of the game determines the time path of money creation fiscal deficits and public debt the game is solved for different equilibrium concepts the equilibria are then compared and interpreted with reference to alternative institutional arrangements the main results are i coordination increases the speed of adjustment towards the steady state and takes the steady state value of public debt closer to the desired target ii precommitments take the non cooperative equilibrium closer to the coordinated outcome iii increasing the weight that each policymaker assigns to his own private objectives slows down the adjustment process places more burden on the opponent but has ambiguous effects on the steady state value of public debt

what is wrong with taylor rules using judgment in monetary policy through targeting rules it is argued that inflation targeting is best understood as a commitment to a targeting rule rather than an instrument rule e ither ageneral targeting rule explicit objectives for monetary policy or a specific targeting rule a criterion for the forecasts of the target variables to be fulfilled essentially the equality of the marginal rates of transformation and substitution between the target variables targeting rules allow the use of judgment and extramodel information are more robust and easier to verify than optimal instrument rules and they can nevertheless bring the economy close to the socially optimal equilibrium

do we really want an independent central bank the issue of an independent central bank is assessed in the context of experience in the u k economy the historical role of the bank of england is examined revealing that the success of anti inflation policy depends on the exchange rate regime as well as on the institutional arrangements holding between the bank and government inflation targets are discussed but independence is also addressed by seeing how other targets such as nominal gdp might perform the theoretical arguments for and against an independent central bank are discussed in detail it is argued that partial independence where the central bank enjoys autonomy in relatively good states and is overridden in bad states is the preferred form of independence attention is drawn to the costs arising owing to a lack of coordination of policy when the finance ministry may compete against the central bank in the case where the latter is independent copyright 1994 by oxford university press

trading off generations equity discounting and climate change the prevailing literature discusses intergenerational trade offs in climate change predominantly in terms of the ramsey equation relying on the infinitely lived agent model we discuss these trade offs in a continuous time olg framework and relate our results to the infinitely lived agent setting we identify three shortcomings of the latter first underlying normative assumptions about social preferences cannot be deduced unambiguously second the distribution among generations living at the same time cannot be captured third the optimal solution may not be implementable in overlapping generations market economies