interest and growth in an economy with land dynamic inefficiency means that in a growing economy some generations can be made better off without making others worse off in the following article the author shows that dynamic inefficiency is ruled out if there exists a nonproducible productive asset that is land this claim is established for arbitrary growth paths not only for steady states

a fiscal reform for increasing employment and mitigating co2 emissions in europe this article discusses the possibility of promoting a fiscal reform which would at a european level permit a double dividend to be obtained the mitigation of co 2 emissions and stimulation of employment creation in this respect a co2 energy tax is considered in the light of financing cuts in social contributions equivalent to 1 of the european gdp simulations carried out with six european countries reveal that under certain conditions this hypothesis could be verified even if the net impact on unemployment and co 2 is rather limited

the greenhouse effect damages costs and abatement the buildup of so called greenhouse gases in the atmosphere co2 in particular appears to be having an adverse impact on the global climate this paper briefly reviews current expectations with regard to physical and biological effects their potential costs to society and likely costs of abatement for a worst case scenario it is impossible to assess in economic terms the full range of possible non linear synergistic effects in the most favorable although not necessarily likely case of slow paced climate change however it seems likely that the impacts are within the affordable range at least in the industrialized countries of the world in the third world the notion of affordability is of doubtful relevance making the problem of quantitative evaluation almost impossible we tentatively assess the lower limit of quantifiable climate induced damages at 30 to 35 per ton of co2 equivalent worldwide with the major damages being concentrated in regions most adversely affected by sea level rise the non quantifiable environmental damages are also significant and should by no means be disregarded the costs and benefits of 1 reducing cfc use and 2 reducing fossil fuel consumption as a means of abatement are considered in some detail this strategy has remarkably high indirect benefits in terms of reduced air pollution damage and even direct cost savings to consumers the indirect benefits of reduced air pollution and its associated health and environmental effects from fossil fuel combustion in the industrialized countries range from 20 to 60 per ton of co2 eliminated in addition there is good evidence that modest e g 25 reductions in co2 emissions may be achievable by the u s and by implication for other countries by a combination of increased energy efficiency and restructuring that would permit simultaneous direct economic benefits savings to energy consumers of the order of 50 per ton of co2 saved a higher level of overall emissions reduction possibly approaching 50 could probably be achieved at little or not net cost by taking advantage of these savings we suggest the use of taxes on fossil fuel extraction or a carbon tax as a reasonable way of inducing the structural changes that would be required to achieve significant reduction in energy use and co2 emissions to minimize the economic burden and create a political constituency in support of the approach we suggest the substitution of resource based taxes in general for other types of taxes on labor income real estate or trade that are now the main sources of government revenue while it is conceded that it would be difficult to calculate the optimal tax on extractive resources we do not think this is a necessary prerequisite to policy making in fact we note that the existing tax system has never been optimized according to theoretical principles and is far from optimal by any reasonable criteria

a uk carbon energy tax a carbon energy tax has been proposed by the european commission to start as us 3 per barrel oil equivalent in 1993 rising to us 10 in 2000 the effects of this tax on the uk economy can be assessed by using a large scale energy environment economy model in which energy demand is treated by means of aggregate equations for energy users and fuel share equations for electricity and each of the main fossil fuels the electricity supply industry is represented in the model by simulating the characteristics of each existing generating station and of a range of new station types and by allowing the model to choose the fuels used from relative fuel prices and prices of capital inputs this approach contrasts with the multimodel approach used in most studies of the effects of the tax the tax is introduced as a tax on imports and domestic output of fossil fuels in proportion to their carbon and energy content with the tax being passed on through the economic system depending on the use of the fuels thus the electricity industry is faced with higher prices for coal gas and fuel oil and chooses to burn the different fuels according to their relative prices four scenarios are developed which vary according to the way the tax revenues are recycled through reductions in vat or in income tax rates and whether the tax is introduced throughout the european community or throughout the oecd if the tax is european it is assumed that the energy intensive industries will be exempt the outcome is that the tax is sufficient to stabilize co2 emissions over the period 1990 2005 at 12 below base levels by the end of the period there is an overall saving of energy compared to base and a further switch to gas in electricity generation the effects on the macroeconomy are rather small and as the revenues are recycled rather than saved by the government gdp growth is likely to increase under the tax by some 0 2 above base this confirms other studies in which revenues are recycled but contradicts many results from studies in which revenue recycling is ignored or incomplete the effects on the energy intensive industries are expected to be small in all the scenarios but 14 of tax revenues are lost if the industries are exempt

strategic responses of incumbents to new entry the effect of ownership structure capital structure and focus we examine how certain firm and market specific characteristics affect incumbent firms responses to new entry into their local markets data comes from the discount department store industry where wal mart entered a large number of markets in a short period of time consistent with existing research larger and more profitable incumbents respond more aggressively to wal mart s entry while more highly levered incumbents respond less aggressively also there is evidence that incumbent managers fight harder possibly overinvest when their job is at greater risk and high managerial ownership appears to reduce this agency problem incumbent firms behave differently in markets under attack by wal mart than in markets not yet threatened suggesting that some of the documented responses are specific to walmart s entry article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

dynamic efficiency in the two sector overlapping generations model abstract this paper examines dynamic efficiency in the context of a two sector overlapping generations model first conditions for dynamic efficiency in a centrally planned economy are derived then in a competitive environment the implications of dynamic in efficiency for the steady state relative price and steady state welfare are demonstrated for the special case of a log linear world the golden rule savings rate is identified along with restrictions on parameters that yield dynamically efficient steady states the results are further demonstrated via a welfare analysis of a simple tax subsidy scheme

internal capital markets and the competition for corporate resources this article examines the role of corporate headquarters in allocating scarce resources to competing projects in an internal capital market unlike a bank headquarters has control rights that enable it to engage in winner picking the practice of actively shifting funds from one project to another by doing a good job in the winner picking dimension headquarters can create value even when it cannot help at all to relax overall firm wide credit constraints the model implies that internal capital markets may sometimes function more efficiently when headquarters oversees a small and focused set of projects this article analyzes the process by which internal capital markets channel limited resources to different uses inside a company in so doing it seeks to address two related sets of questions first what is the fundamental economic rationale for creating an internal capital market that is under what circumstances can it make sense to combine several technologically distinct projects under one roof and have them seek funding from corporate headquarters as opposed to setting them up as stand alone companies that each raise external financing on their own second given this rationale what is the optimal size and scope of an internal capital market should headquarters be involved in funding a large number of projects or just a few and should these projects be unrelated to one another or in similar lines of business the answers to both sets of questions flow from the insight that in a credit constrained setting where not all positive npv projects can be financed headquarters can create value by actively reallocating scarce funds across projects for example the cash flow generated by one division s activities may be taken and spent on investment in another division where the returns are higher or alternatively one division s assets may be used as collateral to raise financing that is then diverted to the other division simply put individual projects must compete for the scarce funds and headquarters job is to pick the winners and losers in this competition

market barriers to energy efficiency abstract discussions of energy policy in an environmentally constrained world often focus on the use of tax instruments to internalize the external effects of energy utilization or achieve specified reductions in energy use in the most cost effective manner a substantial literature suggests however that significant opportunities exist to reduce energy utilization by implementing technologies that are cost effective under prevailing economic conditions but that are not fully implemented by existing market institutions this paper examines the theory of the market for energy using equipment showing that problems of imperfect information and transaction costs may bias rational consumers to purchase devices that use more energy than those that would be selected by a well informed social planner guided by the criterion of economic efficiency consumers must base their purchase decisions on observed prices and expectations of post purchase equipment performance if it is difficult or costly for individuals to form accurate and precise expectations the level of energy efficiency achieved by competitive markets will vary from the socially efficient outcome such market barriers suggest a role for regulatory intervention to improve market performance at prevailing energy prices

global warming and energy demand list of tables list of figures list of contributors preface 1 global warming and energy elasticities terry barker paul ekins and nick johnstonepart 1 estimating long term energy elasticities 2 alternative approaches to estimating long run energy demand elasticities an application to asian developing countries ron smith and m hashem pesaran 3 a survey of international energy elasticities neil manning and jago atkinson 4 long run demand elasticities for gasoline thomas sterner and mikael franzen 5 responses of energy demand in uk manufacturing to the energy price increases of 1973 and 1979 80 alan ingham 6 elasticities for oecd aggregate final energy demand lakis vouyoukas 7 modelling uk energy demand derek hodgson and keith millerpart ii energy the economy and greenhouse gas abatement 8 endogenous technological progress in fossil fuel demand laurence boone stephen hall david kemball cook and clare smith 9 uk energy price elasticities and their implications for long term co2 abatement terry barker 10 price elasticity and market structure overcoming obstacles to ensure energy efficiency tim jackson 11 rethinking the use of energy elasticities stefan p schleicher 12 revisiting the costs of co2 abatement paul ekins 13 asymmetrical price elasticities of energy demand michael grubb14 conclusions terry barker paul ekins and nick johnstone bibliography index

normal markets market imperfections and energy efficiency abstract the conventional distinction between economic and engineering approaches to energy analysis obscures key methodological issues concerning the measurement of the costs and benefits of policies to promote the adoption of energy efficient technologies the engineering approach is in fact based upon firm economic foundations the principle of lifecycle cost minimization that arises directly from the theory of rational investment thus evidence that so called market barriers impede the adoption of cost effective energy efficient technologies implies the existence of market failures as defined in the context of microeconomic theory problems of imperfect information and bounded rationality on the part of consumers for example may lead real world outcomes to deviate from the dictates of efficient resource allocation a widely held contrary view that the engineering view lacks economic justification is based on the fallacy that markets are normally efficient

scientific basis for the greenhouse effect the international community may reach agreement to limit carbon emissions as early as i 992 when brazil will host a negotiating convention on climate change europe and japan have already made commitments to place ceilings on future emissions at or below present rates because the cost of switching to alternative fuels could be high with profound implications for long term economic growth especially in developing countries policy action must be based on the view that the science of the greenhouse effect is compelling this essay considers the scientific logic and evidence for the effect from the viewpoint of an economist it draws heavily on the findings of the intergovernmental panel on climate change ipcc i will stress that both the science and the policy discussion so far including by ipcc have focused insufficiently on effects in the very long term on the order of 250 to 300 years

factor shares inequality and capital flows i present an endogenous growth model where innovations are factor saving and model the choice of technologies in an overlapping generations framework markets are competitive and factor prices are determined by marginal productivity of factors therefore the income share of reproducible factors increases with the stage of development beyond the standard results of this type of model i find that i without bequests long run growth is not possible ii if the economy presents long run growth then intrageneration inequality may last forever but if the economy does not present long run growth then in steady state there is no intrageneration inequality iii when the economy is open the pattern of capital flows depends not only on the relative abundance of factors but also on the technologies and for this reason capital may not flow from rich to poor economies and iv consistently capital flows may not help to break poverty traps

some economics of global warming the greenhouse effect itself is simple enough to understand and is not in any real dispute what is in dispute is its magnitude over the coming century its translation into changes in climates around the globe and the impacts of those climate changes on human welfare and the natural environment these are beyond the professional understanding of any single person the sciences involved are too numerous and diverse demography economics biology and the technology sciences are needed to project emissions atmospheric chemistry oceanography biology and meteorology are needed to translate emissions into climates biology agronomy health sciences economics sociology and glaciology are needed to identify and assess impacts on human societies and natural ecosystems and those are not all there are expert judgments on large pieces of the subject but no single person clothed in this panoply of disciplines has shown up or is likely to this article makes an attempt to forecast the economic and social consequences of global warming due to anthropogenic greenhouse gases and attempting to prevent it

a policy approach to the environmental impacts of technological lock in abstract the broadening spectrum of environmental problems the uncertainty regarding their scale and duration and their possible irreversibility in the context of the growing social preference for environmental quality make it necessary to undertake an ex ante approach to the link between productive activity and environmental quality this link lies in technology and the right approach is to understand how the process of technological change can lead towards sustainability the added value of evolutionary economics in the context of environmental policy resides mainly in the fact that it warns that certain inferior environmental technologies may be locked in to the economic system the results of our model show that it would be advisable to undertake policies expressly aimed at the process of sustainable technological change applying an ex ante precautionary approach in a way that is complementary to the conventional equilibrium oriented environmental policies the nature of these policies and how they might be implemented are questions we will address from this novel approach to the concept of sustainable development in short the main objectives of this paper are to understand more fully the dynamics of the process of technological change its role in sustainable development and to assess the implications of this dynamic approach to techno environmental policy to achieve these goals we have developed an agent based model abm using distributed artificial intelligence dai concepts drawn from the general methodology of social simulation

policy analysis of the greenhouse effect an application of the page model abstract in this paper we introduce a comprehensive model for policy analysis of the greenhouse effect page we apply the page model to assess the merits of policies to prevent global warming by controlling the emissions of greenhouse gases and policies to adapt to any global warming that occurs the results confirm that it is difficult to overcome the problem of global warming by taking preventive action alone the argument for introducing an aggressive adaptive policy is very strong we calculate the valuation that would have to be placed upon non economic environmental and social impacts for a combined strategy of preventive and adaptive policies to be considered a worthwhile option both for individual regions and for the world as a whole we also show that uncertainties in all four groups of inputs to the model scientific costs of control costs of adaptation and valuation of impacts have a great influence on the costs and impacts of the combined strategy

technical evidence for assessing the performance of markets affecting energy efficiency abstract this paper focuses on the empirical basis for skepticism about the effectiveness of the market mechanism in promoting cost effective energy efficiency improvements we present a framework for evaluating engineering economic evidence on the diffusion of energy efficiency improvements and then present a series of examples within this framework that provide evidence for the existence of market imperfections related to energy efficiency we conclude with a challenge to economists policy analysts and technologists to take this empirical evidence seriously and sponsor further collaborative research in this area

nonresponse and delayed response to competitive moves the roles of competitor dependence and action irreversibility competitive moves that are unchallenged or to which response is delayed are important weapons in a strategist s arsenal so variables that discourage or delay response are of great interest using

strategies for cost effective carbon reductions a sensitivity analysis of alternative scenarios analyses of alternative futures often present results for a limited set of scenarios with little if any sensitivity analysis to identify the factors affecting the scenario results this approach creates an artificial impression of certainty associated with the scenarios considered and inhibits understanding of the underlying forces this paper summarizes the economic and carbon savings sensitivity analysis completed for the scenarios for a clean energy future study iwg 2000 its 19 sensitivity cases provide insight into the costs and carbon reduction impacts of a carbon permit trading system demand side efficiency programs and supply side policies impacts under different natural gas and oil price trajectories are also examined the results provide compelling evidence that policy opportunities exist to reduce carbon emissions and save society money

optimal debt contracts and product market competition with exit and entry abstract we show how competition in oligopolies with the possibility of failure and exit of a levered incumbent affects the ex ante design of optimal debt contracts when a levered firm s profits are unobservable a debt contract imposes the threat of nonrenewal to induce truthful revelation because nonrenewal impacts the future profitability of the surviving competitor the contract influences the competitor s pricing strategy and the equilibrium profits of both firms the optimal contract is quite different from a standard debt contract and induces the competitor to be less aggressive resulting in higher equilibrium prices and profits and higher returns for investors

voting on pensions a survey abstract the paper presents a nonexhaustive survey of the literature designed to explain emergence size and political sustainability of pay as you go pension systems it proposes a simple framework of analysis a small open two overlapping generation economy model around which some variants are displayed dictatorship of the median voter is assumed the text is organized to answer the following questions i do political equilibria with payg pension schemes exist ii why do they emerge iii what are the conditions for the participation constraint of the pension game to be verified and finally iv what is the size of the pension system chosen by the median voter and how is this size influenced by an exogenous e g demographic shock

rethinking the costs related to global warming a survey of the issues one approach to the economic analysis of global warming seeks to balance the costs of damage from or adaptation to it with the costs of mitigating it the costs of adaptation and damage have been estimated using techniques of environmental evaluation but are subject to a wide margin of uncertainty the costs of mitigation principally by reducing the emissions of co2 have been estimated using different kinds of economic models some of the results of which have suggested that very little abatement of carbon emissions is justified before the costs of abatement exceed the benefits of it in terms of foregone damage and adaptation costs the paper analyses the extent to which this conclusion is a function of the modelling assumptions and techniques used rather than likely practical outcomes with regard to the models treatment of unemployed resources revenue recycling prior distortions in the economy due to the tax system and possible dynamic effects from the introduction of a carbon energy tax it concludes that with different and arguably more appropriate treatment of the above issues especially when the secondary benefits of reducing co2 emissions are also taken into account it is not clear that even substantial reductions in the use of fossil fuels will incur net costs especially if there is the prospect of even moderate costs from global warming

critical remarks on piketty s capital in the twenty first century this article discusses the central macroeconomic claims that are made in thomas piketty s book capital in the twenty first century the article aims to show that piketty s contentions are not only logically flawed but also contradicted by his own data

climate policy without tears cge based ancillary benefits estimates for chile this study examines a hithertoneglected set of benefits from climate policy viz the reduction in emissions of localair pollutants and the associated healthbenefits in this case for residents ofsantiago de chile by using an economy widemodel we are able to compare these monetisedbenefits to the direct costs of carbonabatement thereby determining the scope for no regrets co2 reductions sensitivityanalysis is performed in recognition of theuncertainty surrounding certain key parameterand exogenous variable values notably households willingness to pay wtp forreduced mortality and morbidity risk and thesubstitution elasticities among energy sourcesand between energy and other inputs ourresults suggest that even with the mostconservative assumptions low wtp lowelasticities chile could reduce co2emissions by almost 20 from the 2010 baselinewith no net welfare loss though a 10 reduction is closer to optimal if insteadchile were to target a 20 reduction inparticulate concentrations a particulate taxwould incur slightly lower costs than anequivalent carbon tax to achieve the samehealth benefits while the latter is asecond best method of addressing localpollution the welfare loss of choosing thisinstrument could be fully compensated by carboncredit sales at a world market price of 20 tc

a study on economic measures for co2 reduction in japan in this paper we investigate the costs and effectiveness of two co2 emission control policies a co2 tax and a subsidy for co2 reduction criepi s medium term economic forecasting system is used to analyse the co2 tax policy it is concluded that the national cost of co2 reduction by taxation is prohibitively high for the subsidy we used an integrated approach combining a bottom up model with criepi s model although we have shown the usefulness of the integrated approach for analysing the subsidy policy we need to gather more data to make the results more reliable

the bright side of internal capital markets we examine capital expenditure decisions of discount firms in response to wal mart s entry into their markets before wal mart s entry focused incumbents and discount divisions of diversified incumbents are similar in size geographic dispersion and firm debt levels however discount divisions of diversified firms are significantly more productive after wal mart s entry diversified firms are quicker to either exit the discount business or stay and fight also their capital expenditures are more sensitive to the productivity of their discount business internal capital markets function well as transfers are away from the worsening discount divisions it appears diversified firms make better investment decisions

understanding carbon lock in abstract this paper narrative argues that industrial economies have been locked into fossil fuel based energy systems through a process of technological and institutional co evolution driven by path dependent increasing returns to scale it is asserted that this condition termed carbon lock in creates persistent market and policy failures that can inhibit the diffusion of carbon saving technologies despite their apparent environmental and economic advantages the notion of a techno institutional complex is introduced to capture the idea that lock in occurs through combined interactions among technological systems and governing institutions while carbon lock in provides a conceptual basis for understanding macro level barriers to the diffusion of carbon saving technologies it also generates questions for standard economic modeling approaches that abstract away technological and institutional evolution in their elaboration the question of escaping carbon lock in is left for a future paper

monetary valuation of the social cost of co2 emissions a critical survey an expanding branch of research has estimated the potential costs of climate change which are often expressed as the social cost of carbon scc or the costs of an additional ton of co2 emissions estimates of the scc can be used by policy makers to evaluate climate change policies and greenhouse gas emission reduction projects by means of cost benefit analyses cbas such analyses are complicated by the wide range of scc values that have been reported in the literature and the large uncertainties involved in estimating the potential economic impacts and related costs of climate change this study presents a critical review of the reported scc estimates by examining some neglected consequences of climate change uncertain and extreme scenarios of climate change the discounting of future climate change effects the treatment of individual risk aversion and assumptions about social welfare in view of the many uncertainties and omissions in conventional cost benefit analyses of climate impacts and the scc alternative approaches to decision making should be considered for climate policy

effects of a carbon price in the u s on economic sectors resource use and emissions an input output approach abstract despite differences in their implementation most carbon policies aim to have similar outcomes effectively raising the price of carbon intensive products relative to non carbon intensive products while it is possible to predict the simple broad scale economic impacts of raising the price of carbon intensive products the demand for non carbon intensive products will increase understanding the economic and environmental impacts of carbon policies throughout the life cycle of both types of products is more difficult using the example of a carbon tax this study proposes a methodology that integrates short term policy induced consumer demand changes into the input output framework to analyze the environmental and economic repercussions of a policy environmental repercussions include the direct and the indirect impacts on emissions materials flow in the economy and the reliance on various ecosystem goods and services the approach combines economic data with data about physical flow of fossil fuels between sectors consumption of natural resources and emissions from each sector it applies several input output modeling equations sequentially and uses various levels of aggregation disaggregation it is illustrated with the data for the 2002 u s economy and physical flows the framework provides insight into the short term complex interactions between carbon price and its economic and environmental effects

on the assessment of utility demand side management programs abstract we compare the total resource cost and willingness to pay accounting methods of calculating demand side management benefits and costs after a review of massachusetts electric company s process evaluation data we conclude that the total resource cost method more accurately represents actual program results however even the total resource cost method may be incomplete since it fails to account for savings associated with efficient equipment purchased independent of the utility program but as a direct result of participants positive educational experiences in the program

carbon trading in the policy mix the kyoto protocol is stimulating the development of emissions trading schemes at the national and international levels these are being introduced alongside existing policy instruments such as carbon taxes and negotiated agreements leading to complex problems of policy interaction but the topic of policy interaction remains under researched this paper aims to improve understanding of such interactions by examining the conditions under which a cap and trade scheme for carbon dioxide emissions may usefully coexist with carbon energy taxes support mechanisms for renewable electricity and policies to promote energy efficiency the paper argues that each of these instrument combinations may be acceptable provided they contribute to either improving the static or dynamic efficiency of the trading scheme or delivering other valued policy objectives but since the coexisting instruments may raise overall abatement costs while contributing nothing further to emission reductions the objectives and trade offs within the policy mix must be explicit

discounting and distributional considerations in the context of global warming the economics of global warming is reviewed with special emphasis on how the cost depends on the discount rate and on how costs in poor and rich regions are aggregated into a global cost estimate both of these factors depend on the assumptions made concerning the underlying utility and welfare functions it is common to aggregate welfare gains and losses across generations and countries as if the utility of money were constant but it is not if we assume that a e co2 equivalent dlubling implies costs equal to 1 5 of the income in both high and low income countries a pure rate of time preference equal to zero and a utility function which is logarithmic in income then the marginal cost of co2 emissions is estimated at 260 590 usd ton c for a time horizon in the range 300 1000 years an estimate which is large enough to justify significant reductions of co2 emissions on purely economic grounds the estimate is approximately 50 100 times larger than the estimate made by nordhaus in his dice model and the difference is almost completely due to the choice of discount rate and the weight given to the costs in the developing world as well as a more accurate model of the carbon cycle finally the sensitivity of the marginal cost estimate with respect to several parameters is analyzed

reexamination of dynamic efficiency with taxation on land abstract this paper examines the possibility of overaccumulation of capital in an overlapping generations economy with land with zero population growth rate the steady state equilibrium is dynamically efficient imposition of property tax on land however distorts the no arbitrage condition and can generate dynamic inefficiency a similar possibility arises in an economy with a positive growth rate in population

globalizing carbon lock in this paper extends the arguments surrounding carbon lock in elaborated in unruh energy policy 28 2000 817 30 2002 317 to countries currently undergoing industrialization it argues that for numerous reasons industrializing countries are unlikely to leapfrog carbon intensive energy development on the contrary carbon lock in may be globalizing and could further constrain climate change mitigation options it is then argued that many policy recommendations ignore carbon lock in possibly limiting their potential for successful implementation the paper then discusses four policy approaches that appear to have advantages given lock in conditions it is recognized however that relative ease of implementation does not necessarily equate with superiority instead it is merely a path dependent outcome of past development decisions pursuing policies on the basis of relative implementation ease may help address the issue of climate change but could also result in sub optimal outcomes along other dimensions of sustainable development

research frontiers in the economics of climate change academic and policy debates over climate change risks and policies have stimulated economic research in a variety of fields in this article i briefly discuss eight overlapping areas of current research in which further effort is particularly warranted these areas include decision criteria for policy risk assessment and adaptation uncertainty and learning abatement cost and the innovation and diffusion of technology and the credibility of policies and international agreements further analysis in these areas not only will advance academic understanding but also will provide insights of considerable importance to policymakers

monetary economics a review essay in this essay i define money to be whatever objects serve as generally acceptable media of exchange and i define monetary economics to be the study of the causes and economic consequences of the monetization of exchange that is of the use of media of exchange these definitions lead me to specify the distinctive objectives of monetary economics to be to understand 1 the monetization of exchange and its relation to the technologies of production and of exchange 2 the form that money takes and especially the viability of fiat money 3 the determination and significance of the real value of units of money and 4 the relation between the nominal quantity of money and aggregate economic activity the essay tries to acquaint the reader with the contents of the recently published handbook of monetary economic as they relate to these objectives of monetary economics and offer some critical thoughts on selected unsettled issues in monetary economics that my reading of the handbook suggested this abstract was borrowed from another version of this item

the costs of mitigating carbon emissions a review of methods and findings from european studies abstract conventional wisdom has it that top down studies of mitigation costs are too pessimistic while bottom up studies are too optimistic in examining mitigation cost studies for western europe this paper finds this interpretation to be flawed the paper expands the analytical framework for interpreting mitigation cost studies evaluates the treatment of no regrets options and other input assumptions in the various studies and includes findings from recent integrated top down bottom up modeling assessments not covered in the ipcc report based on these new elements it is found that mitigation costs tend to be overestimated not only in top down studies but also in bottom up studies given this pervasive bias toward pessimism the body of existing mitigation cost assessments for western europe can be read as follows over the next three to four decades a combination of tax shifts market transformation instruments and policies to reform subsidies and internalize non climatic externalities could cut carbon emissions in western europe by 40 50 relative to the base year at no loss or at a gain in gdp averaged over the medium term and including a phase in period an economically optimal rate of implementing western europe s no regrets potentials is found to be in the neighborhood of 2 per year relative to base year levels

social security reform and investment in education is there scope for a pareto improvement we propose a pareto improving policy which reduces the overall wage tax burden in an economy with intergenerational trade in a fixed factor of production here labelled as land we analyse a second best environment in which the government cannot resort to non distortionary land taxes reducing the social security contribution rate encourages investment in human capital future efficiency gains accruing to complementary land are capitalized in its value the capital gains may compensate land owning pensioners for reduced benefits we also explain why the unfunded pension system may have lost its appeal even for pensioners after its introduction

optimal contracting with moral hazard and cascading in this article i identify optimal incentive contracts for managers of firms competing in the product market such firms often confront similar decisions and uncertainties managers can improve decision quality by generating private signals through costly effort however since signals are likely to be correlated firms that decide later get additional information from the actions of earlier firms this impacts effort choice decision quality is also affected if later managers disregard their own signals and blindly imitate preceding decisions in a competitive environment such cascading hurts profits contracts that solve both moral hazard and cascading problems typically put more weight on firm profits making them expensive contacts with more weight on decision quality are less expensive but result in cascades shareholders choose contracts that maximize their net surplus this results in testable implications about which industries may have more convergence in investment choices greater pay for profit sensitivity larger differences in observed contracts more innovation larger size firms and potential for overcompensation article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

dynamic inefficiency in an economy with land contrary to the belief that capital over accumulation is impossible in an economy with land i e a non reproducible factor of production this paper shows that the possibility of dynamic inefficiency depends on the income share of land and examines the historical tendencies of the income share of land in the u s

macroeconomic and sectoral impacts of carbon taxation a case for the japanese economy it is now commonly recognized that a carbon tax is one of the most effective and economically efficient policy instruments to reduce carbon dioxide co2 emissions if cost effective however carbon taxes might impose widely distributed economic burdens among industrial sectors or firms particularly when factor mobilities are imperfect in the short run since high economic performance could be hindered by a serious implementation of the polluter pays principle we examine and compare a trade off relationship between the expected macroeconomic costs and sectoral impacts in a simplified general equilibrium framework attempts are also made to evaluate a government subsidy financed by tax revenues to investments in new energy efficient technologies as a complementary mitigation policy to carbon taxation

monopolistic competition dynamic inefficiency and asset bubbles abstract we emphasise the importance of the market structure to determine whether dynamic inefficiency is possible in a closed economy we analyse alternative monopolistic competition frameworks where the existence of pure profit involves the presence of an asset market when entry is blockaded dynamic inefficiency is prevented as each firm uses a discount rate higher than the output growth rate in evaluating future profits when entry is free but involves sunk costs we need to distinguish between the possibility of asset bubbles and dynamic inefficiency the condition for the latter being more stringent if entry costs increase with per capita output dynamically inefficient equilibria are possible only when population grows

this blessed plot when should capital gains on land be regarded as income national balance sheets for a number of advanced economies show land to be a valuable form of natural capital whose value has increased sharply over the last twenty years or so this paper investigates when or whether capital gains on land should be counted as a component of income while development projects can lead to increases in rental rates and land values it is shown that although the benefits any project should be counted as income increases in rental rates and land values should not normally be seen as additional real income however if land benefits from exogenous land saving technical progress the resulting capital gains can be seen as income applying the same principle to human capital it is shown on a steady growth path that these capital gains are equal to weitzman s 1997 growth premium in the relationship between income and sustainable consumption

global environmental risks the need to manage climate risks is not a new it has shaped social institutions for many centuries in medieval england a peasant farmer s land was broken into many widely dispersed parcels economic historians interpret this as a way of hedging climate risk see references in bromley 9 land in different locations would be affected differently by droughts floods and frosts by spreading land holdings over different locations as well as by organizing agricultural cooperatives and buying insurance farmers have managed climate risk for many centuries

capital market imperfections and countercyclical markups theory and evidence during recessions output prices seem to rise relative to wages and raw material prices one explanation is that imperfectly competitive firms compete less aggressively during recessions that is markups of price over marginal cost are countercyclical the authors present a model of countercyclical markups based on capital market imperfections during recessions liquidity constrained firms boost short run profits by raising prices to cut their investments in market share the authors provide evidence from the supermarket industry in support of this theory during regional and macroeconomic recessions more financially constrained supermarket chains raise their prices relative to less financially constrained chains copyright 1996 by american economic association

property taxes and dynamic efficiency a correction according to kim and lee 1997 property taxes as opposed to capital gain taxes and taxes on rent endanger dynamic efficiency the present paper shows that the choice of the tax base is immaterial what counts is whether the taxes eliminate the after tax rent empirical evidence suggests that this is not the case

why leverage affects pricing we explain and provide evidence for effects of leverage on pricing our model identifies two effects that either counteract or reinforce each other depending on the debt maturity structure i firms set higher prices underinvest in market share if they have more debt and ii firms engage in dynamic risk shifting by setting lower higher prices if the current debt obligation will be higher lower in the next period than in the present period using a unique dataset of owner managed hotels in austrian ski resorts we provide empirical evidence of both effects

conglomerates and industry distress focusing on economic distress episodes in an industry we estimate the effect of conglomeration on resource allocation distressed segments have higher sales growth higher cash flow and higher expenditure on research and development than single segment firms this is especially true for segments with high past performance for unrated firms and in competitive industries single segment firms increase cash holding and the diversification discount reduces during industry distress firms with high past performance acquire their industry counterparts and firms with low past performance exit the distressed industry industries more prone to distress have greater conglomeration overall conglomeration enables segments to avoid financial constraints during industry distress the author 2011 published by oxford university press on behalf of the society for financial studies all rights reserved for permissions please e mail journals permissions oup com oxford university press

the limitations of industry concentration measures constructed with compustat data implications for finance research industry concentration measures calculated with compustat data which cover only the public firms in an industry are poor proxies for actual industry concentration these measures have correlations of only 13 with the corresponding u s census measures which are based on all public and private firms in an industry also only when u s census measures are used is there evidence consistent with theoretical predictions that moreconcentrated industries which should be more oligopolistic are populated by larger and fewer firms with higher price cost margins further the significant relations of compustatbased industry concentration measures with the dependent variables of several important prior studies are not obtained when u s census measures are used one of the reasons for this occurrence is that compustat based measures proxy for industry decline overall our results indicate that product markets research that uses compustat based industry concentration measures may lead to incorrect conclusions jel g10 g30 l10 a growing number of studies that consider the effects of product markets on financial economics related phenomena use industry concentration measures calculated with compustat data which cover only the public firms in an industry these studies examine issues related to asset pricing hou and robinson 2006 informed trading tookes 2008 idiosyncratic stock return volatility gaspar and massa 2006 mergers and acquisitions song and walkling 2000 fee and thomas 2004 shahrur 2005 corporate governance defond and park 1999 engel hayes andwang2003 rennie2006 karuna2007 capitalstructure lang and stulz 1992 kaleand shahrur 2007 corporate disclosurepolicy

estimating bounds on the economy wide effects of the cef policy scenarios abstract the scenarios for a clean energy future study relied primarily on bottom up technology based methods to estimate costs associated with its scenarios these methods however do not allow for calculation of economy wide or general equilibrium effects of the policies considered we propose and apply a means of combining the bottom up estimates with estimates of the costs associated with a carbon charge obtained from computable general equilibrium models our approach is based on the concept of production inefficiency the economy lies within its production frontier with respect to the provision of energy services the cef technology policies are interpreted as moving the economy toward its frontier as well as moving the frontier outward while the carbon charge induces a substitution effect along the frontier this perspective allows a synthesis of the two sets of calculations

cheaper oil a turning point in paris climate talk abstract the 2015 paris climate conference is designed to achieve a legally binding agreement on climate change for the first time in over 20 years however the participants face a much tougher task in striking a new deal after the disappointing preparatory climate change talks in lima however falling oil prices have created more room to maneuver for the forthcoming global climate talks than previously thought average global oil prices have plunged from usd 110 per barrel in june 2014 to approximately usd 60 per barrel in may 2015 with the sharply falling oil prices and the downward pressure on gas and coal prices both the removal of fossil fuel subsidies ffs and the implementation of a carbon tax could be conducted without raising energy costs a growing body of research suggests that removing ffs and implementing a carbon tax could significantly reduce carbon emissions thus the approximately 50 drop in oil prices has provided a window of opportunity to reduce carbon emissions by removing ffs and internalizing climatic externalities worldwide as this window will not last forever both these measures should be implemented quickly and be considered central to the paris climate change conference compared with the lack of success in the previous two decades of climate diplomacy these two measures constitute technical and economic factors that will make a difference in the 2015 un climate change conference

the capital energy complementarity debate revisited this paper argues that the empirical disagreement as to whether capital and energy are complements or substitutes is not likely to be reconciled with aggregate data it demonstrates that price induced changes in the composition of output can cause either outcome in the aggregate even if no technical substitution is possible substitution by consumers and changes in the relative incomes of consumers and foreigners are identified as key factors in determining which outcome arises

pricing exit and location decisions of firms evidence on the role of debt and operating efficiency abstract we compare pricing and exit decisions of discounters across the business cycle cities containing high debt and or low efficiency firms display higher prices during non recession years during recessions prices increase in cities with less efficient incumbents but decrease in cities with a mix of high and low debt firms high debt firms are more likely to exit cities with lower prices and high debt exiting firms are more likely to be efficient apparently low debt firms strategically lower prices during recessions to force exit of efficient financially constrained rivals weaker competitors face another cost new entrants locate closer

property taxes and dynamic inefficiency a correction of a correction abstract according to homburg s 2014 comment on kim and lee 1997 a property tax cannot cause dynamic inefficiency in overlapping generations models with land unless the tax confiscates the entire land rent but then homburg claims land would be intrinsically worthless and the market for land would be closed the latter claim is invalid because as a store of value land can trade at a positive price even though its net return is negative

on the value of life in rich and poor countries and distributional weights beyond utilitarianism this paper discusses the use ofdistributional weights in cba based on a generalbergson samuelson swf in particular it illustratessome consequences of applying a swf characterized byconstant inequality aversion which includes classicalutilitarianism as a special case together with aconstant relative risk aversion utility function whencalculating the damage costs of global warming itextends and clarifies earlier unintuitive results andemphasizes that utility must be seen as fully cardinalin terms of levels in this context in the specialcase of utilitarianism on the other hand it issufficient to be able to make interpersonalcomparisons of utility changes

the impact of capital structure on advertising competition an empirical study this article examines the interaction between capital structure and advertising competition using a sample of firms that raise significant amounts of capital we find that firms whose financial leverage has decreased as a result of their new funding increase their advertising significantly more than firms whose leverage has increased we also find that these firms industry rivals respond less aggressively with their own advertising when they have more debt in their capital structure overall our results support the view that financial leverage has a dampening effect on the intensity with which a firm chooses to compete in the product market

the energy efficiency gap what does it mean abstract as renewed attention has been given by policy makers to energy conservation issues it has frequently been asserted that an energy efficiency gap exists between actual and optimal energy use the critical questions is how to define the optimal level of energy efficiency this paper seeks to disentangle some confusing strands of argument that are frequently brought to bear on this question by identifying the major conceptual issues that determine the set of feasible answers we identify five separate and distinct notions of optimality the economists economic potential the technologists economic potential hypothetical potential the narrow social optimum and the true social optimum each of these has associated with it a corresponding definition of the energy efficiency gap our analysis demonstrates that necessary preconditions for identifying the right measure of the energy efficiency gap include understanding and disentangling market failure and non market failure explanations for the gradual diffusion of energy efficient technologies

the damage costs of climate change toward more comprehensive calculations it is argued that estimating the damage costs of a certain benchmark climate change is not sufficient what is needed are cost functions and confidence intervals although these are contained in the integrated models and their technical manuals this paper brings them into the open in order to stimulate discussion after briefly reviewing the benchmark climate change damage costs region specific cost functions are presented which distinguish tangible from intangible losses and the losses due to a changing climate from those due to a changed climate furthermore cost functions are assumed to be quadratic as an approximation of the unknown but presumably convex functions results from the damage module of the integrated climate economy model fund are presented next uncertainties are incorporated and expected damages are calculated it is shown that because of convex loss functions and right skewed uncertain ties the risk premium is substantial calling for more action than analysis based on best guess estimates the final section explores some needs for further scientific research

prices and market structure an empirical analysis of the supermarket industry in chile this article investigates empirically the relationship between market structure and consumer prices in the supermarket industry in chile a panel of monthly data from 16 cities in the period january 1998 september 2006 is used we find that the more concentrated the industry in a city the higher the prices while the participation of major national chains in cities tends to lower prices in terms of magnitude this latter effect prevails over the former moreover the dominant local chain is found to behave differently depending on whether or not one of the national chains is present in the city finally we find that prices rise when a national chain acquires another chain and both were previously in a city inmerge while if only one of the two was present outmerge prices fall

gerontocracy revisited unilateral transfer to the young may benefit the middle aged according to conventional wisdom intergenerational transfers can survive in the absence of altruism only if the old are net recipients i prove that this need not hold in an overlapping generations model with a fixed factor for example the middle aged owning land may gain by providing public education even when they cannot tax the young and when the young face no credit market constraints this requires that labor is not mobile furthermore establishing public education may benefit only the generation which pays for education twice first for itself and then for the next generation

public debt and low interest rates this lecture focuses on the costs of public debt when safe interest rates are low i develop four main arguments first i show that the current us situation in which safe interest rates are expected to remain below growth rates for a long time is more the historical norm than the exception if the future is like the past this implies that debt rollovers that is the issuance of debt without a later increase in taxes may well be feasible put bluntly public debt may have no fiscal cost second even in the absence of fiscal costs public debt reduces capital accumulation and may therefore have welfare costs i show that welfare costs may be smaller than typically assumed the reason is that the safe rate is the risk adjusted rate of return to capital if it is lower than the growth rate it indicates that the risk adjusted rate of return to capital is in fact low the average risky rate however also plays a role i show how both the average risky rate and the average safe rate determine welfare outcomes third i look at the evidence on the average risky rate i e the average marginal product of capital while the measured rate of earnings has been and is still quite high the evidence from asset markets suggests that the marginal product of capital may be lower with the difference reflecting either mismeasurement of capital or rents this matters for debt the lower the marginal product the lower the welfare cost of debt fourth i discuss a number of arguments against high public debt and in particular the existence of multiple equilibria where investors believe debt to be risky and by requiring a risk premium increase the fiscal burden and make debt effectively more risky this is a very relevant argument but it does not have straightforward implications for the appropriate level of debt my purpose in the lecture is not to argue for more public debt especially in the current political environment it is to have a richer discussion of the costs of debt and of fiscal policy than is currently the case