large scale deployment of renewables for electricity generation comparisons of resource assessments suggest that sufficient renewable energy resources are available to allow for large scale deployment of renewable energy technologies economic analysis identifies barriers to the adoption of renewable energy sources resulting from i market structure ii competition in an uneven playing field and iii various non marketplace barriers however even if these barriers are removed the problem of technology lock out remains the key policy response is strategic deployment coupled with increased r d support to accelerate the pace of improvement through market experience this paper suggests significant contributions from various technologies are possible but does not assess their optimal or maximal market share copyright 2005 oxford university press

analysing the interactions between renewable energy promotion and energy efficiency support schemes the impact of different instruments and design elements abstract co2 emissions reduction renewable energy deployment and energy efficiency are three main energy environmental goals particularly in europe their relevance has led to the implementation of support schemes in these realms their coexistence may lead to overlaps synergies and conflicts between them the aim of this paper is to analyse the interactions between energy efficiency measures and renewable energy promotion whereas previous analyses have focused on the interactions between emissions trading schemes ets and energy efficiency measures and ets and renewable energy promotion schemes furthermore the analysis in this paper transcends the certificate debate i e tradable green and white certificates and considers other instruments particularly feed in tariffs for renewable electricity the goal is to identify positive and negative interactions between energy efficiency and renewable electricity promotion and to assess whether the choice of specific instruments and design elements within those instruments affects the results of the interactions

simultaneous attainment of energy goals by means of green certificates and emission permits abstract we discuss the analytical effects of introducing emission permits and green certificates and the corresponding quotas as regulatory mechanisms to respectively reduce emissions from electricity production and ensure a certain deployment of renewable energy the different case studies in this paper show that both instruments can be used in order to reach an emission goal or a goal of renewable energy however the combination of these instruments and the way they are used is shown to be important for the price faced by consumers it is shown that the effect on the consumer price is not an unambiguous increase with the introduction of a green quota there is a choice between quotas leading to a lower consumer price and quotas leading to a higher consumer price as a result of this it is shown that it is always optimal to reach a renewable energy deployment goal by the use of green certificates however to reach an emission goal it is sometimes most favourable with respect to consumer prices to use green certificates and sometimes to use emission permits

why does the combination of the european union emissions trading scheme and a renewable energy target makes economic sense abstract the european climate and energy mix of targets and policies has been criticised by many economists in particular it is often argued that the renewable energy targets do not make economic sense because they represent an expensive option to reduce co2 emissions within a cap and trade scheme such as the european union emissions trading scheme eu ets in addition it has also been claimed that support for renewable electricity deployment negatively interacts with the eu ets having a dampening effect on the co2 price which favours the dirtiest technologies and is detrimental for the greener ones in this article we argue that this mainstream economic view is short sighted and that a multidisciplinary economic analysis of the climate and energy policy mix is required mainstream economic analysis is based on a narrow approach for the assessment of instrument combinations and neglects relevant insights from several economic disciplines including innovation economics and political economy approaches in reality economic theory supports the combination of an ets and renewable energy targets the existence of different policy goals and market failures the demand pull influence of renewable energy policies on innovation a political economy approach and the different risk exposure of renewable energy technologies call for a policy mix although policy combinations are not a panacea and bring problems on their own the aforementioned negative interaction between renewable energy deployment and the carbon price in the eu ets can be mitigated through appropriate coordination and or instrument choice and design

environmental regulation technological diversity and the dynamics of technological change inducing technological progress is an important objective of environmental regulation we investigate under which conditions regulation induced technological progress pursues the best technological option we analyze a setting with vertical and horizontal technological progress cost uncertainty time limited patent protection and a case that is typical for some emissi4on intensive industries like electricity generation or the chemical industry under taxes and standards only the current least cost technology is used and developed implying a lock in into a possibly inferior technology tradable permits yield slower progress but can facilitate the simultaneous development of technologies rendering lock ins less likely

the labor market for new ph d economists presents results from a survey of 450 new 1996 97 ph d economists providing information about employment underemployment employers work activities salaries and job satisfaction comparisons are made across ranks of the graduates ph d programs sectors of employment and subfields of economics as well as over time labor market outcomes for economists also are compared with those of seven other disciplines results indicate that a growing proportion of new economics ph d s start their careers in business or industry that an international market for new economics ph d s is evolving and that job outcomes for economists compare favorably with new ph d s in many other disciplines

global warming irreversibility and learning a number of economists have argued that the literature on the irreversibility effect implies that current abatement of greenhouse gas emissions should be greater when there is the possibility of obtaining better information in the future about the potential damages from global warming than when there is no possibility of obtaining better information in this paper we show that even the simplest model of global warming does not satisfy either of epstein s 1980 sufficient conditions so it is not possible to use epstein s analysis to tell whether the irreversibility effect applies to models of global warming we derive an alternative sufficient condition for the irreversibility effect to hold

white certificate schemes economic analysis and interactions with the eu ets this paper examines the economic environmental and distributional impacts of an idealised tradable white certificate twc scheme and shows how the impacts are modified when the scheme operates in parallel with the eu emissions trading scheme eu ets it uses simple graphical techniques to assess whether a twc scheme will increase decrease or have an ambiguous effect on electricity demand wholesale and retail electricity prices carbon emissions and investment in energy efficiency paying particular attention to the interpretation of additionality

towards a sustainable electrification in ghana a review of renewable energy deployment policies abstract ghana has been facing perennial power rationing over the years due to fuel supply challenges the country s energy system is likely to suffer additional strain from rising energy demand fueled by population growth rapid urbanization and economic development fortunately there are enormous renewable energy resources which can provide sustainable electrification as backbone to socioeconomic development while curbing global warming ghana s energy strategy targets 100 access to electricity and 10 share of sustainable power in national generation mix by 2020 despite the existence of numerous policies and a renewable energy act current contribution of non conventional renewable energy to electricity generation is less than 1 the right mix of policies to address the unique domestic conditions and achieve its specific development goals remains insufficient this study reviews the regulatory framework financing incentives and other provisions of ghana s renewable energy act it critically examines the policy s strengths weaknesses opportunities and treats based on comparative analysis and lessons drawn from failed and successful implementation of similar policies around the world the study also assesses the impact of policy on project development it was found that the performance of ghana s renewable energy policy on grid connected electricity has been poor compared to its target the fundamental reasons for this unsatisfactory performance may be attributed to partial implementation of policies lack of market driven support schemes lack of pricing policy framework weak grid network limited access to funds and inconsistencies in renewable energy development strategies this study proposes the following countermeasures i ghana should comprehensively harmonize renewable energy regulatory and fiscal policies with domestic electricity pricing regime ii market driven support schemes should be prioritized for cost effectiveness and minimum governmental influence these reforms can help eliminate some of the major barriers to sustainable electrification in ghana while the lessons provide a learning curve for other african countries

market motives distinctive capabilities and domestic inertia a hybrid model of innovation generation the authors develop and test a model of innovation in which the generative process of innovation is fostered by a balance of three forces market motives distinctive capabilities and domestic ine

competition between private and public schools vouchers and peer group effects a theoretical and computational model with tax financed tuition free public schools and competitive tuition financed private schools is developed students differ by ability and income achievement depends on own ability and on peers abilities equilibrium has a strict hierarchy of school qualities and two dimensional student sorting with stratification by ability and income in private schools high ability low income students receive tuition discounts while low ability high income students pay tuition premia tuition vouchers increase the relative size of the private sector and the extent of student sorting and benefit high ability students relative to low ability students

supplementing an emissions tax by a feed in tariff for renewable electricity to address learning spillovers abstract in the presence of learning spillovers related to renewable energy technologies an optimal strategy to mitigate climate change should complement an emissions tax by a subsidy for renewables this article addresses the question how such subsidy should be designed it is shown that the widely used approach of a revenue neutral fixed feed in tariff can yield an optimal outcome under restrictive conditions only it has to be adapted continuously as the electricity price changes moreover funding the tariff by a surcharge on the electricity price has important implications for the design of the emission tax the optimal tax rate has to be below the pigovian level differentiated across fossil fuels and adapted over time as the patterns of technological development change these requirements may pose a formidable challenge for practical decision making however it is important to point out that the eventual choices made with respect to the design and funding of a feed in tariff have to be based on a careful and more comprehensive policy assessment including inter alia economic effects beyond the electricity sector and existing institutional constraints

support schemes and vertical integration who skims the cream this paper examines how the effectiveness of feed in tariffs for distributed generators producing renewable electricity depends on industry structure i e vertical integration vs unbundling a stylized analytical model with a monopolist and a competitive fringe distributed generators will be developed to analyze the impact of feed in tariffs on renewable power production the vertically integrated monopolist maximizes profits by setting the electricity price for residual demand and a network access charge incurred by the fringe the fringe receives a fixed feed in tariff per unit of electricity produced under vertical integration a rise in the feed in tariff induces the monopolist to raise access charges for fringe firms and skim part of their additional income this partially offsets the supply increase of the fringe firms stimulated by the feed in tariff however in the case of effective unbundling with an externally set access charge there is no possibility for the monopolist to extract part of the fringe s profit then the feed in tariff fully accrues to the competitive fringe and its supply will further increase this setting will be extended to horizontal expansion when the monopolist also enters the renewable production segment the effects on prices and output will be derived and compared

classifying technology policy from an evolutionary perspective abstract for the classification of technology policy in an evolutionary framework the taxonomy of mission and diffusion oriented policy design introduced by ergas ergas h 1987 the importance of technology policy in dasgupta p stoneman p eds economic policy and technological performance cambridge univ press cambridge is useful however ergas indirect method of identifying the respective policy style is only able to give a first and rough insight in the technology policy of a specific country to improve on that we developed a so called direct method aiming at a sound characterization of single policy measures and giving a more detailed picture about policy orientation to demonstrate the basic procedure of the suggested approach it is applied empirically on the german technology policy of the last 2 decades

the social basis of interdependent preferences abstract most economists are sympathetic to the idea that concerns for relative position are an important aspect of many economic problems there has traditionally been a reluctance to include such concerns primarily because models that included them often allow such a broad range of behavior that there are few if any restrictions on equilibrium behavior and hence such models would have little or no predictive power in this paper we discuss how reduced form models may naturally give rise to utility functions that depend in part on relative standing there are several advantages of modelling concern for relative standing in reduced form utility functions even when there is no similar concern in the deep preferences it provides structure and constraints on the way that relative standing affects utility and further it can yield testable implications about the way that changes in the underlying environment affect the concern for relative standing we discuss the advantages and disadvantages of modelling social concerns in this way and provide examples that illustrate how concerns for relative standing can affect savings investment and labor choice decisions

do deployment policies pick technologies by not picking applications a simulation of investment decisions in technologies with multiple applications abstract the role of deployment policies that aim to foster technological change has grown considerably especially in the fields of energy and climate however recent research has shown that the adoption of deployment policies carries the potential of locking in the technology that is most cost effective at the point of policy introduction but may be inefficient in the long term the present paper contributes to the emerging literature on the role of deployment policies in creating path dependency and eventually technology lock in while previous studies focused on the relationship between lock in and the technology specificity of deployment policies this paper introduces a new factor the existence of multiple applications for a technology we argue that this factor is highly relevant for technological lock in and should be considered by policy makers to support our argument we simulate the competition among four stationary battery technologies across energy system applications in an investment simulation model this simulation shows that the degree of competition among technologies differs strongly across applications which corresponds with a highly varying lock in probability hence selecting applications in deployment policies very likely corresponds to selecting technologies we discuss the implications of these results for both policy makers and for the academic debate on deployment policies and technological lock in as well as on technology assessment and governance more generally based on the notion that policies can have different technology specificity levels we develop the idea of the application specificity of policies and provide examples of currently enacted deployment policies that vary in terms of their technology and application specificity

simulating price patterns for tradable green certificates to promote electricity generation from wind abstract this article uses computer simulation to anticipate the price dynamics in a market for tradable green certificates tgcs these markets have been used in europe to promote generation of electricity from renewable resources like wind similar markets have been proposed in the united states of america usa where the certificates are called renewable energy credits recs the certificates are issued to the generating companies for each megawatt hour of renewable electricity generation the companies may sell the certificates in a market and the revenues from certificate sales provide an extra incentive to invest in new generating capacity proponents argue that this market based incentive can be designed to support government mandates for a growing fraction of electricity generation from renewable sources in the usa these mandates are set by the states and are known as renewable portfolio standards rps we simulate the price dynamics of a market designed to support an aggressive mandate for wind generation in the northwestern usa the simulations show that the certificate price climbs rapidly to the cap in the early years after the market opens investors then react to these high prices with construction of new wind capacity after a few years wind generation meets and then exceeds the requirement we show that this pattern appears again and again when the simulations are repeated with wide variations in the estimates of behavioral parameters we use the model to study the impact of different trading strategies by the wind companies and by the distribution companies we also study the simulated market response if the usa adopts the carbon allowance market envisioned in the climate stewardship act the article concludes with recommendations for policy makers involved in tgc market design

impact of renewables deployment on the co2 price and the co2 emissions in the european electricity sector abstract as of 2005 electricity generators in europe operate under the european union emission trading system eu ets at the same time european member states have launched support mechanisms to stimulate the deployment of renewable electricity sources res e res e injections displace co 2 emissions within the sectors operating under the eu ets and they reduce the demand for european union allowances euas thereby reducing the eua price this paper presents the results of an ex post analysis to quantify the impact of res e deployment on the eua price and co 2 emissions in the western and southern european electricity sector during the period from 2007 to 2010 following from an operational partial equilibrium model of the electricity sector this study shows that the co 2 displacement from the electricity sector to other ets sectors due to res e deployment can be up to more than 10 of historical co 2 emissions in the electricity sector the eua price decrease caused by res e deployment turns out to be likely significant

promotion turnover and preemptive wage offers this paper examines the strategic promotion and wage decisions of employers when employees may be more valuable to competing firms competing employers must incur a cost to learn the quality of their match with a manager promotion signals that workers are potentially valuable managers in other firms and so can lead to turnover to preempt competition for a manager an employer may offer a wage high enough to discourage competitors from acquiring information and bidding up the wage further or hiring the worker away this transfers wages from good workers to bad more costly information acquisition yields greater expected lifetime wages copyright 1993 by american economic association

schumpeterian competition in experimental markets abstract we report on a series of laboratory experiments that capture key elements of research and development r d rivalry the experimental environment has a small number of sellers who compete in terms of pricing and production decisions and in terms of cost reducing r d rewards for innovation depend on the profitability of product market competition the experiments capture a kind of dynamic schumpeterian competition there is a sharp contrast in experimental results between monopolies and four seller competitive markets aggregate r d is higher under competition than under monopoly and prices follow marginal cost reductions much more quickly under competition than under monopoly the paper examines market performance in the experiments and the sources of market performance problems

the new approach to wilderness preservation through benefit cost analysis over the last 15 years economists of resources for the future led by john krutilla have been developing a new approach to wilderness preservation this paper offers a concise exposition of their approach and adds a few new steps the basic ingredient of the new approach is a perception of declining net benefits of wilderness development and rising net benefits of wilderness preservation over time these alter the entire shape of the benefit cost analysis of potential development the new steps involve reversibility postponability and recognition of multiple interest rates

the danish green certificate system some simple analytical results we formulate a simple static equilibrium model for the electricity market taking account of both green certificates and co2 emission permits the objective is to investigate the relationship between these markets under the existence of upper and lower price bounds on the green certificates both in the short and in the long run we perform various comparative static changes of the parameters of the model and study how these affect the endogenous variables of the model as well as producers and consumers surplus we also investigate the effects of imports and exports of electricity several comparative static results are derived and in particular it is shown that harsher co2 emission constraints and increased import wholesale price both may lead to reduced capacity of green electricity

costs and benefits of the renewable production of electricity in spain abstract the reduction of pollutant emissions and greenhouse gases as well as the strong energy dependence on fossil fuels gas and fuel oil have among other reasons led many countries in recent years to develop policies to promote and encourage the use of alternative sustainable clean and predictable sources of energy this paper presents an overview of the production of electricity from renewable sources pe res in spain and offers an outline of the current level of development of renewable energy it also reviews the current support system the costs of integrating renewable energy into the electric system as well as the effects of this type of energy on the electricity wholesale market price the gross domestic product gdp the environment human health and employment

chicken and egg competition among intermediation service providers we analyze a model of imperfect price competition between intermediation service providers we insist on features that are relevant for informational intermediation via the internet the presence of indirect network externalities the possibility of using the nonexclusive services of several intermediaries and the widespread practice of price discrimination based on users identity and on usage efficient market structures emerge in equilibrium as well as some specific form of inefficient structures intermediaries have incentives to propose non exclusive services as this moderates competition and allows them to exert market power we analyze in detail the pricing and business strategies followed by intermediation services providers copyright 2003 by the rand corporation

wright meets markowitz how standard portfolio theory changes when assets are technologies following experience curves abstract we consider how to optimally allocate investments in a portfolio of competing technologies using the standard mean variance framework of portfolio theory we assume that technologies follow the empirically observed relationship known as wright s law also called a learning curve or experience curve which postulates that costs drop as cumulative production increases this introduces a positive feedback between cost and investment that complicates the portfolio problem leading to multiple local optima and causing a trade off between concentrating investments in one project to spur rapid progress vs diversifying over many projects to hedge against failure we study the two technology case and characterize the optimal diversification in terms of progress rates variability initial costs initial experience risk aversion discount rate and total demand the efficient frontier framework is used to visualize technology portfolios and show how feedback results in nonlinear distortions of the feasible set for the two period case in which learning and uncertainty interact with discounting we compare different scenarios and find that the discount rate plays a critical role

the estimation of barone curves based on the iwai model abstract based on the evolutionary model of iwai the authors show that the supply curve of barone can be interpreted as an outcome of the dynamic process of schumpeterian competition by using empirically given distributions of profits the barone curve can be estimated significantly for different industries of the federal republic of germany in this respect the paper at hand not only provides a strong argument for the validity of the iwai model but also gives important insights into the individual forces of schumpeterian competition and their impact on the market structures in an economy

first in village or second in rome though individuals prefer high quality peers there are advantages to being high up in the pecking order within a group in this environment sorting of agents yields an overlapping interval structure in the type space segregation and mixing coexist in a stable equilibrium with transfers this equilibrium corresponds to a competitive equilibrium where agents bid for relative positions and entails less segregation than the efficient allocation more egalitarianism within organizations induces greater segregation across organizations but can improve the allocation efficiency since competition is most intense for intermediate talent effective personnel policies differ systematically between high quality and low quality organizations

the market for new ph d economists in 2002 a period of malaise in the mid 1990 s led to a contraction in enrollment at many economics ph d programs the resulting reduction in the supply of new ph d economists combined with a smaller contraction in demand for new ph d economists generated as the wall street journal reported a hot pursuit for some economics ph d s with even low level candidates being treated like big shots jon e hilsenrath 2001 p b1 as might be expected the scarcity of new economics ph d s that materialized at the end of the decade appears to have induced more enrollments in economics ph d programs with annual matriculations rising by about 25 percent between fall 1998 and fall 2002 charles e scott and siegfried 1999 2003 predictions for the current job market are mixed on the one hand demand may expand as some academic departments whose hiring had been constrained by financial exigency return to active recruiting jennifer jacobson 2003 on the other hand the aftermath of the recession continues to limit some public university budgets at the same time that the supply of new economics ph d s may start to expand resulting in a job market for american ph d s that the economist 2003 p 60 describes as bleak five years ago we reported the results of a comprehensive survey of the labor market for economics ph d s graduating in 1996 1997 siegfried and stock 1999 in contrast to other social science and science disciplines most economists who graduated with a doctorate in 1996 1997 found full time careertracking jobs that paid well those in permanent full time jobs in the united states earned an average starting salary of 61 000 many of those employed in business and industry however were not satisfied with their jobs despite receiving a significant salary premium relative to academics here we report results from a new survey of the class of economics ph d s graduating in 2001 2002 this information should be of interest to current and prospective ph d students of use to advisors of undergraduates considering graduate study in economics and of assistance to faculty concerned with the employment prospects of applicants they admit to their doctoral programs for methodological details consult our earlier report siegfried and stock 1999

a review on promoting share of renewable energy by green trading mechanisms in power system abstract in order to promote the development of renewable energy power generation many countries have issued corresponding policies meanwhile some green trading mechanisms have been implemented in power industry and this paper has mainly presented a review on promoting share of renewable energy by green trading mechanisms in power system with a focus on promotion effects of three mechanisms feed in tariff renewable portfolio standard and emission trading scheme apart from a review summaries comparisons and an outlook for future study are also presented our review suggests that feed in tariff and renewable portfolio standard can effectively increase the share of renewable energy power and lead to renewable resource diversity in addition emission trading also provides stimulus for development of renewable energy besides mitigation of carbon emission

the distribution of talent across contests do the contests with the largest prizes attract the most able contestants to what extent do contestants avoid competition in this paper we show theoretically and empirically that the distribution of abilities plays a crucial role in determining contest choice complete sorting exists only when the proportion of high ability contestants is sufficiently small as this proportion increases high ability contestants shy away from competition and sorting decreases such that reverse sorting becomes a possibility we test our theoretical predictions with a large panel data set containing contest choice over twenty years we use exogenous variation in the participation of highly able competitors to provide empirical evidence for the relationship among prizes competition and sorting

is renewable energy a cost effective mitigation resource an application to the spanish electricity market abstract this paper evaluates the net effect of renewable energy policy in spain from 2002 to 2017 and calculates its cost effectiveness in terms of co2 emission reductions in the production of electricity our conclusions indicate that although the phasing out of feed in tariffs reduced the regulatory costs it also limited renewable participation in the electricity market leading to an increased electricity price and higher emissions according to our results the joint effect of i the value of avoided emissions due to renewable energy participation and ii the merit order effect was able to compensate for the regulatory costs subsidies up until 2010 while the sign of the net effect was reversed from 2011 to 2017 finally we find that the economic implications of emission reductions are highly dependent on how the social cost of carbon is measured

optimal regulation of renewable energy a comparison of feed in tariffs and tradable green certificates in the spanish electricity system abstract incentives for renewable energy based on feed in tariffs have succeeded in achieving high levels of renewable installed capacity however these incentives have not been responsive to market conditions or price signals imposing in some cases a great financial burden on consumers when renewable energy sources reached significant levels a way out of this problem could be a market mechanism where incentives respond to the level of investment on renewables we explore this issue comparing a regulatory system based on tradable green certificates able to react to market changes to a feed in tariffs incentive scheme we model the strategic interaction between participants in the electricity pool and the tradable green certificates market and focus on the optimal regulation for the retailer segment which generates the desired demand for green certificates as a decreasing function of the certificate price we then calibrate our theoretical model with data from the spanish electricity system for the period 2008 2013 simulations show that a green certificate scheme could both achieve the 2020 targets for renewable electricity and reduce regulatory costs however the role of regulators is still important since setting the right target for renewable electricity affects the cost burden of the system

raiding opportunities and unemployment this article studies the impact of raiding opportunities in a labor market in which worker abilities differ recruiting firms can either raid an elsewhere employed worker of known ability by bidding up his wage or go through costly search to find a good worker among the unemployed in equilibrium all types of workers experience unemployment high ability workers involuntarily the raiding opportunities give rise to involuntary unemployment without changing the basic properties of the competitive model and thus suggest new implications of various institutional parameters on unemployment in particular unemployment compensation minimum wages wage taxation and search requirements

co2 abatement from renewables in the german electricity sector does a co2 price help abstract the overlapping impact of the emission trading system ets and renewable energy re deployment targets creates a classic case of interaction effects whereas the price interaction is widely recognized and has been thoroughly discussed the effect of an overlapping instrument on the abatement attributable to an instrument has gained little attention this paper estimates the actual reduction in demand for european union allowances that has occurred due to re deployment focusing on the german electricity sector for the five years 2006 through 2010 based on a unit commitment model we estimate that co 2 emissions from the german electricity sector are reduced by 35 to 60 mtons or 10 to 18 of what estimated emissions would have been without any re policy but with the co 2 price remaining in place at the observed level furthermore we find that the abatement attributable to re injections is greater in the presence of an allowance price than otherwise the same holds for the ets effect in presence of re injection this interaction effect is consistently positive for the german electricity system at least for the considered years and on the order of 0 5 to 1 5 of emissions

a complexity approach to innovation networks the case of the aircraft industry 1909 1997 successful innovation depends on complementary competencies in networks of producers users and governmental bodies the effects of complementarities within innovation networks are modeled using kauffman s nk model from the model the hypothesis is derived that producers users and governments self organize in specialized innovation networks producers of particular technologies increasingly focus on particular user markets in particular countries data on 863 aircraft models 1909 1997 show these strong specialization patterns in the post war period policy implications are indicated emphasizing the recent rise in transnational collaborations which can be understood as a means of escaping historical specialization patterns

schumpeterian dynamics an evolutionary model of innovation and imitation abstract this paper develops a simple evolutionary model of innovation and imitation it analyzes how dynamic interactions between equilibrating force of imitation and disequilibrating force of innovation mold the evolutionary pattern of an industry s state of technology and shows that in this schumpeterian world the industry will never approach a neoclassical equilibrium with perfect knowlwdge even in the long run the paper also examines the steady state efficiency distribution of firms that characterizes the industry s long run and obtains some comparative dynamics results

towards an ecological economics of sustainability abstract persistent disagreement both as to the interpretation to be given to sustainability and as to the relation between ecological and economic sustainability has hindered the development of an ecological economics of sustainable resource use this paper identifies the main concepts of sustainability deriving from the two disciplines in order to explore the difference implied by an ecological approach to the problem it is argued that present economic and ecological approaches are largely disjoint and that they address basically different phenomena by combining the efficiency requirements of what is usually thought of as economic sustainability with the stability requirements of an ecological approach it is shown that an intertemporally efficient allocation of resources that satisfies the conditions for constant levels of consumption is not necessary to assure ecological sustainability ecological sustainability requires that the allocation of economic resources should not result in the instability of the economy environment system as a whole

related variety unrelated variety and technological breakthroughs an analysis of us state level patenting castaldi c frenken k and los b related variety unrelated variety and technological breakthroughs an analysis of us state level patenting regional studies this paper investigates how variety affects the innovation output of a region borrowing arguments from theories of recombinant innovation it is expected that related variety will enhance innovation as related technologies are more easily recombined into a new technology however it is also expected that unrelated variety enhances technological breakthroughs since radical innovation often stems from connecting previously unrelated technologies opening up whole new functionalities and applications using patent data for us states in the period 1977 99 and associated citation data evidence is found for both hypotheses this study thus sheds a new and critical light on the related variety hypothesis in economic geography

decoupling the eu ets from subsidized renewables and other demand side effects lessons from the impact of the eu ets on co2 emissions in the german electricity sector abstract this paper analyzes the impact of the eu ets on co2 reduction in the german electricity sector we find an ets induced emission abatement which is not exceeding 6 of total emissions with a maximum already in 2010 thereafter the ets has not induced additional reductions this outcome corresponds to the recent debate about sub optimal performance of the eu ets caused by excessive allowances following up on this we develop a unilateral flexible cap to eliminate demand side effects which lead to excessive allowances the unilateral flexible cap is based on emission intensities using the works of newell and pizer 2008 sue wing et al 2009 we prove that an intensity based emission cap is advantageous in the german electricity sector when compared to an absolute cap an ex post analysis shows that the amount of excessive allowances resulting from the economic crisis during the second trading period could have been significantly lowered with a unilateral flexible cap this approach also decouples the eu ets from a simultaneous promotion of renewable energy

interactions between the power and green certificate markets abstract the current trend of liberalising the power markets is combined with ambitious deployment plans for power production based on renewable energy supplies a new policy scheme to ensure this extension has been developed in the form of a green certificate system with a politically determined target of deployment in such a system producers of renewably based electricity receive tradable certificates in proportion to the electricity they produce the producer can thereby sell these certificates and receive additional revenue apart from the power price this paper studies the price and consumption effects of such a system with a simple model we show that the effects are ambiguous this ambiguity is caused by the interaction between the two markets therefore the green certificate system is difficult to manage if the state has parallel energy targets such as a desired deployment of renewably based energy and a stabilisation or reduction of the energy consumption in addition this complicates the regulation through a deployment target of renewably based power production as the regulator has to be aware of the different effects which follow a specific target until now these effects have not been considered in the analyses of the green certificate system when introducing the system even though it might have considerable consequences for the success of the system

optimal diversity increasing returns versus recombinant innovation abstract choices regarding diversity play an important role in economics and innovation management but often remain implicit once made explicit the objectives of efficiency and diversity are usually posed as in conflict as efficiency relates positively and diversity negatively to various increasing returns to scale in markets such a perspective however neglects the benefits of diversity in terms of realizing system improvements through recombinant innovation or spillovers the latter implies a contribution of diversity to long term efficiency dominant economic approaches that address diversity such as option value and real options theories regard benefits of diversity as exogenous this paper proposes a simple model of variable endogenous diversity to analyse the optimal balance between increasing returns to scale and recombinant innovation it is discussed under which conditions one of four solutions is optimal complete specialization regardless of which option complete specialization in one specific option symmetric diversity perfect balance and asymmetric diversity the results give rise to a number of policy insights

beyond replicator dynamics innovation selection dynamics and optimal diversity we propose a new evolutionary approach to model technological change based on an extension of replicator dynamics with recombination and mutation it gives rise to interactive innovation selection dynamics the model allows studying the combined effects of selection and variety generation on evolutionary economic change the developed framework describes a population of boundedly rational entrepreneurs who decide each period on the allocation of investments in different production technologies they tend to invest in belowaverage cost technologies just as under replicator dynamics in addition they spend a constant fraction of investments captured by mutation and recombination rates on alternative technologies and research on recombinant innovation as opposed to most previous studies mutation and recombination are here conceptual variables with a concrete behavioral interpretation namely describing the decision rules heuristics of investors we compare the dynamics of shares of investments in various technologies for three cases with constant costs of capital with costs decreasing steadily and exogenously over time and with costs depending on the level of cumulative investments for each model version we examine under which conditions the coexistence of technological options is feasible and optimal in terms of minimising the average cost of investments authors abstract

impacts of a common green certificate market on electricity and co2 emission markets in the nordic countries abstract the purpose of this study is to analyze the effects of introducing a common nordic system for tradable green certificates tgcs on the electricity market and a future market for tradable co 2 emission permits teps in the analysis the energy system model generator markal was used to model the electricity and district heating supply systems in the four nordic countries sweden norway finland and denmark it is shown that the introduction of tgc quotas reduces wholesale electricity and tep prices the impact on the latter is very pronounced retail electricity prices may become lower or higher depending on the tgc quota than if obligations to fulfill tgc quotas were absent the tgc scheme s efficiency in reducing a specific amount of co 2 emissions is also compared to the corresponding efficiency of a tep scheme involving a broader range of technologies furthermore obligations to fulfill tgc quotas affect investment incentives for new non renewable electricity supply this seems especially true for gas fired power plants finally it is indicated that electricity supply based on biomass combustion dominates the tgc scheme at least in the short run

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

finance innovation and industrial change abstract this paper investigates the impact financial structures upon industrial dynamics whenever the system is permanently characterized by unexploited opportunities for innovation highly bounded rationality and trial and error search processes in these circumstances it is argued specific financial set ups such as market based vs credit based mechanisms of allocation control and ownership transfer are likely to exert different influences on the rates and modes of industrial innovation relatedly one suggests some hypotheses on the links between financial systems and features of industrial evolution and some tentative taxonomies

financial risks for green electricity investors and producers in a tradable green certificate market this paper analyzes financial risks in a market for tradable green certificates tgc from two perspectives existing renewable producers and potential investors in new renewable electricity generation capacity the equilibrium pricing mechanism for a consumer based tgc market is described and a market with wind turbines as the sole renewable technology is analyzed in this framework tgc prices and fluctuations in production from wind turbines will be negatively correlated and as a result tgc price fluctuations can actually help decrease the total financial risk based on this recognition analytical expressions for revenue variance minimizing trading strategies are derived and an analysis of the demand and supply for financial hedging is used to show that forward contracts will be traded at a risk premium

design limitations in australian renewable electricity policies abstract renewable electricity is pivotal to the medium and long term reduction of australia s greenhouse gas ghg emissions if deep cuts in them are eventually implemented this paper examines the effectiveness of the principal existing policies that could potentially promote the expansion of renewable electricity relec in australia the expanded renewable energy target ret the proposed emissions trading scheme ets and the state and territory based feed in tariffs we find the effectiveness of ret is severely eroded by the inclusion of solar and heat pump hot water systems by the inclusion of phantom tradable certificates and by high electricity consumption growth we also find that the ets will not produce a high enough carbon price to assist most relec technologies before 2020 and that most of the feed in tariffs exclude large scale relec and will give little assistance to small scale relec because they are mostly net tariffs unless there is a major revision of its relec policy mechanisms australia will fail to reach its renewable electricity target and in particular will fail to build up its solar generation capacity which could be a major source of future deep cuts in the country s electricity generation emissions

social norms savings behavior and growth we argue that many goods and decisions are not allocated or made through markets we interpret an agent s status as a ranking device that determines how well he or she fares in the nonmarket sector the existence of a nonmarket sector can endogenously generate a concern for relative position in for example the income distribution so that higher income implies higher status moreover it can naturally yield multiple equilibria it is thus possible to explain differences in growth rates across countries without recourse to differences in underlying preferences technologies or endowments different social organizations lead to different reduced form preferences which lead to different growth rates

imitation costs and patents an empirical study it has long been recognised that the costs of imitating new products have an important effect on the incentives for innovation in a market economy as arrow i962 and others have pointed out if firms can imitate an innovation at a cost that is substantially below the cost to the innovator of developing the innovation there may be little or no incentive for the innovator to carry out the innovation in their discussions of the innovation process economists frequently have called attention to the major role played by the costs of imitation but there has been little or no attempt to measure these costs to test various hypotheses concerning the factors influencing them or to estimate their effects in this paper we report some findings of what seems to be the first study of this topic in addition we present data regarding the effects of patents on imitation costs and on the rate of innovation

technological change and market structure an evolutionary approach this paper studies an inter temporal market context in which firms innovate imitate and compete in quantities and technological choices each period potential entrants enter if there are profitable opportunities incumbent firms exit when they go bankrupt the key aspect of the model is that technological change evolves along a directed graph this graph reflects both the direction of technological change and the magnitude of costs involved in switching technologies in this set up my main concern is to explore the implications of different technological structures on entry exit dynamics and on the evolution of market characteristics market concentration profitability variance etc

sustainability with uncertain future preferences a feature of the sustainability problem is that the preferences of future generations are uncertain in this paper we put forward a fairness based definition of sustainability that takes this uncertainty into account we analyze the implications of this definition in the context of a model of project evaluation we show that our definition encompasses the concepts of non declining welfare and of weak and strong sustainability furthermore we show that preference uncertainty has a substantial influence on the implications of sustainability

comparing the innovation effects of support schemes for renewable electricity technologies a function of innovation approach abstract the aim of this paper is to provide a comparative assessment of the innovation effects of instruments which support the diffusion of renewable electricity technologies with a functions oriented technological innovation system perspective the paper provides a link between two major streams of the literature the functions of innovation systems and the literature on renewable electricity support schemes we show that when a functional perspective is adopted feed in tariffs are likely to be superior to other policy instruments quotas with tradable green certificates and tendering although they still need to be complemented with other instruments most importantly direct r d support furthermore those innovation effects are affected by the specific design elements of the instruments chosen

equilibrium and inefficiency in a community model with peer group effects public service output depends on input expenditures on own personal characteristics and on the characteristics of the other residents in the community the peer group effect in a community model with public expenditures set by voting with migration between communities and with land price differentials capitalization it is shown that communities may become heterogeneous in composition and second best inefficient this equilibrium occurs when the peer group effect is neither too strong nor too weak the inefficiency arises because an externality is created by migration the land price differential does not play the part of the price of the better peer group but of a transfer payment

evolutionary policies for sustainable development adaptive flexibility and risk minimising abstract an evolutionary perspective on policies to foster sustainable development is presented it is argued that policies suggested by the traditional economic theory of environmental policy can stimulate unsustainable socio economic structures and patterns in addition they are unable to remove undesired locked in systems and technologies drawing on evolutionary thinking characterised by diversity selection innovation path dependence and bounded rationality an alternative partly complementary theory of environmental policy is suggested specific attention is given to the role of strategies that are aimed at increasing diversity and adaptive flexibility and at reducing risk

carbon mitigation in the electric power sector under cap and trade and renewables policies in europe co2 emissions from the electric power sector and energy intensive industries are capped under a cap and trade system i e the eu ets when other indirect measures are taken to impact emissions in a specific sector under the cap such as a push for renewables in the electric power sector this has implications on the overall allowance price and on co2 emissions both from this specific sector and the other sectors under the cap the central contribution of this paper is the derivation of impact curves which describe these interactions i e the impact on allowance price and the shift of emissions across sectors from a set of detailed simulations of the electric power system operation a so called emission plane is obtained from which impact curves can be derived focus is on interactions between co2 abatement through fuel switching and measures affecting the residual electricity demand such as deployment of renewables in the electric power sector as well as on interactions with other sectors both in a short term framework a case study for central western europe is presented the analysis reveals a substantial impact of renewables on co2 emissions and hence on emissions shifts across sectors and or on the co2 price

competing for talents abstract two organizations compete for high quality agents from a fixed population of heterogeneous qualities by designing how to distribute their resources among members according to their quality ranking the peer effect induces both organizations to spend the bulk of their resources on higher ranks in an attempt to attract top talents that benefit the rest of their membership equilibrium is asymmetric with the organization with a lower average quality offering steeper increases in resources per rank high quality agents are present in both organizations while low quality agents receive no resources from either organization and are segregated by quality into the two organizations a stronger peer effect increases the competition for high quality agents resulting in both organizations concentrating their resources on fewer ranks with steeper increases in resources per rank and yields a greater equilibrium difference in average quality between the two organizations

evolutionary modelling of the macro economic impacts of catastrophic flood events this paper examines the possible contribution of evolutionary economics to macro economic modelling of flood impacts to provide guidance for future economic risk modelling most macro economic models start from a neoclassical economic perspective and focus on equilibrium outcomes either in a static or dynamic way and describe economic processes at a high level of aggregation as a consequence they typically fail to account for the complexity of social interactions and other behavioural responses of consumers and producers to disasters which may affect the macroeconomic impacts of floods employing evolutionary principles and methods such as agent based modelling may help to address some of the shortcomings of current macro economic models we explore and discuss the implications of applying consumer and producer heterogeneity bounded rationality network effects social and technological learning co evolution and adaptive policy making concepts into existing economic frameworks for the assessment of macro economic impacts of floods authors abstract

recombinant innovation and the boundaries of the firm abstract recombinant innovation the combination of existing ideas is important for technological progress we want to understand how important market frictions are in stifling the transmission of ideas from one firm to another although the theoretical literature emphasizes the importance of these frictions direct empirical evidence on them is limited we use comprehensive data on patent applications from the european patent office and a multiple spells duration model to provide estimates that suggest that they are substantial it is around 30 more costly to successfully discover and utilize new ideas created in another firm than in your own this compares to the increased costs of accessing new ideas across national borders of around 7 and across technologies of around 20 these result point towards substantial imperfections in the market for technology

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

market structure and innovation a survey economics we all recite deals with allocation of limited resources towards satisfaction of unlimited wants resources are typically identified as land labor and capital plus a technology that determines their transformation into consumer goods disparity between the available goods and services and the desired gives rise to scarcity and the question of what how and for whom to produce the focus then shifts to description and evaluation of alternative resource allocation mechanisms for making the choices the pareto criterion by which an allocation of resources is deemed efficient if any reallocation improving the position of some individual worsens the position of others is a commonly employed gauge of a mechanism s performance in the absence of externalities increasing returns to scale and uncertainty a perfectly competitive market system yields a pareto optimal allocation of resources this underlies the view that individual self interest is compatible with society s interest the further conclusion that pareto optimality may not be achieved via the market system in the presence of monopoly elements provides an economic rationale for antitrust laws the objective of a resource allocation mechanism appears to be according to the analysis described above to make the best of available resources the alternative objective of relaxing constraints through expanding the resource base or developing new technology seems to be beyond its scope thus until rather recently technical advance had been regarded in the mainstream of economic theory as unmotivated by the quest for profits and substantially unaffected by resource allocation instead as j schmookler observed technology had been viewed as a parameter like the weather affecting the outcome of resource allocations but itself unaffected by them 84 1965 evidence that technological progress has significantly contributed to growth in productivity together with a substantial increase in research and development activity largely financed by government and carried out by industry see f machlup 51 1962 may have spurred reconsideration of this view once technical advance is regarded as an economic variable it is natural to in

do support systems for res e reduce eu ets driven electricity prices abstract support systems for electricity from renewable energy sources res e can reduce electricity prices which have also been influenced by a co2 emission trading scheme ets additional res e substitutes electricity from fossil fuels and thus co2 emissions are reduced the demand for emission reductions is lowered as a result the co2 price is also reduced consequently the wholesale price for electricity decreases however most res e support systems are financed via the electricity market which increases the retail electricity price an assessment for germany shows that retail electricity prices in the first trading period of the eu ets 2005 2007 are lowered by 2 6 euro mwh due to additional res e considering the complete eu the effect is substantially higher this paper describes the effect and the influence of different policy designs it develops an approach for assessing the effect and applies it for the case of germany and roughly estimates the effect for the eu

a public choice view on the climate and energy policy mix in the eu how do the emissions trading scheme and support for renewable energies interact abstract in this paper we analyze the rationale for an energy policy mix when the european emissions trading scheme ets is considered from a public choice perspective that is we argue that the economic textbook model of the ets implausibly assumes 1 efficient policy design and 2 climate protection as the single objective of policy intervention contrary to these assumptions we propose that the ets originates from a political bargaining game within a context of multiple policy objectives in particular the emissions cap is negotiated between regulators and emitters with the emitters abatement costs as crucial bargaining variable this public choice view yields striking implications for an optimal policy mix comprising res supporting policies whereas the textbook model implies that the ets alone provides sufficient climate protection our analysis suggests that support for renewable energies 1 contributes to a more effective ets design and 2 may even increase the overall efficiency of climate and energy policy if other externalities and policy objectives besides climate protection are considered thus our analysis also shows that a public choice view not necessarily entails negative evaluations concerning efficiency and effectiveness of a policy mix

the effect of wind and solar power generation on wholesale electricity prices in australia abstract our paper investigates the effect of wind and utility scale solar electricity generation on wholesale electricity prices in australia over 2010 2018 we use both high frequency 30 min and daily datasets for the australian national electricity market nem we estimate autoregressive distributed lag models ardl to decompose the merit order effect of wind and utility scale solar pv generation over time and across states we find that an extra gw of dispatched wind capacity decreases the wholesale electricity price by 11 aud mwh at the time of generation while solar capacity by 14 aud mwh the daily merit order effect is lower we show that the wind merit order effect has been increasing as a function of dispatched wind capacity over time despite of this wholesale electricity prices in australia have been increasing predominantly driven by the increase in natural gas prices our findings further strengthen the evidence of the merit order effect of renewable energy sources with important implications for the current energy policy debate in australia

the ponds dilemma is it better to be a big fish in a small pond or a small fish in a big pond to find out we study self selection into contests our simple model predicts that 1 entry into the big pond in terms of show up fees number or value of prizes is non monotonic in ability 2 entry into the more meritocratic pond is likewise non monotonic exhibiting two interior extrema and disproportionately attracting very low ability types and 3 changes in rewards can produce unexpected effects e g higher show up fees may lower entry while higher prizes or more meritocracy may lower the average ability of entrants this article is protected by copyright all rights reserved

the two faces of market support how deployment policies affect technological exploration and exploitation in the solar photovoltaic industry the recent years have seen a strong rise in policies aiming to increase the diffusion of clean energy technologies while there is general agreement that such deployment policies have been very effective in bringing technologies to the market it is less understood how these policies affect technological innovation to shed more light on this important question we conducted comparative case studies with a global sample of 9 firms producing solar photovoltaic pv modules complemented by in depth interviews with 16 leading pv industry experts we propose that on the one hand policy induced market growth serves as an important catalyst for innovative activity as it raises the absolute level of firm investments in technological exploration on the other hand however deployment policies create an incentive for firms pursuing more mature technologies to shift their balance between exploitation and exploration toward exploitation firms focusing on less mature technologies cannot tap the potentials of exploitative learning to the same extent as those with more mature technologies therefore stimulating strong market growth may raise the barrier to market entry for less mature technologies we conclude that when designing deployment policies great care should be taken to avoid adverse effects on technological diversity and a premature lock in into more established technologies

schumpeterian dynamics part ii technological progress firm growth and economic selection abstract business firms strive for survival and growth they innovate in order to grow they imitate in order to survive the purpose of this paper the second in the series on schumpeterian dynamics is to construct a simple mathematical model which is capable of studying the evolution of an industry s state of technology as a dynamic outcome of the interactions among innovation imitation and capacity growth at the micro level of firms the doctrine of economic selection insists by means of the analogy to the biological theory of natural selection that only the most efficient firms will survive the long run competitive struggle for capacity growth indeed if neither innovation nor imitation is possible for the firm a firm or a group of firms which is lucky enough to start with the most efficient technology will outgrow all the other firms in the long run once however the possibility of technological imitation is allowed for the firms the industry will settle down to a static equilibrium of perfect technological knowledge not by the success of the most efficient firms in their striving for the higher growth rate but by the success of the less efficient in their effort to imitate the others the blind force of economic selection is thus outwitted by the human force of imitative activities finally when firms are allowed to innovate in their technology the selective force of market competition is no longer capable of weeding out the less fit even in the long run indeed it is shown in the present paper that the dynamic interplay of the processes of innovation imitation and growth will keep the industry s state of technology from settling down to the static equilibrium but reproduce in the long run a relative dispersion of efficiencies across firms in a statistically balanced form

examining the financial performance of micro generation wind projects and the subsidy effect of feed in tariffs for urban locations in the united kingdom abstract this paper seeks to evaluate the effect of the upcoming 2010 uk feed in tariff uk fit on decentralised small wind energy installations at the household and building level in urban locations it is projected that the uk fit will stimulate an unprecedented surge in building mounted turbine installation the tariff amount must stimulate incentive but mitigate the likelihood of distortions in the competitive electricity market to analyse these issues measured energy output from sites in the warwick wind trials project wwtp is converted into revenue in a net present value npv framework for assessing commercial purchases of small wind systems variances in project variables are examined through npv simulations using monte carlo analysis to capture permutations of small wind project performance in the uk with and without the uk fit our research concludes that the proposed tariff amount of 30 5 p kwh will not significantly boost the economic attractiveness of mildly selective wwtp based sites in the uk furthermore the fixed tariff rate kwh generated could cause inefficiencies applied across uneven wind resource distribution the results of this study suggest further examination of policy related to micro generation in particular decentralised small wind projects

some challenges related to introducing tradable green certificates abstract denmark is about to implement a tradable green certificate tgc system this paper presents and discusses some of the obstacles related to using tgcs as a part of the energy policy the most prominent obstacles are related to managing the coexistence of multiple types of res e suppliers with just one policy instrument the first problem considered relates to the creation of incentives for new res e deployment the second problem relates to unfortunate mixes of res e sources the final problem discussed relates to the problem of production overflow

the dynamic implications of increasing returns technological change and path dependent inefficiency this paper addresses the issue of path dependent selection and inefficiency counterfactual methods and the empirical evidence employed in this research trajectory the general message is basically that the theoretical argument to prove path dependent inefficiency is relatively straightforward while empirical demonstrations as well as the analysis of welfare implications are much more difficult in the first section we briefly state the basic argument explaining how localized learning leads to an incomplete exploration of the variety distribution of a technology we then synthesize the most interesting historical studies which get potential regret results and ask whether these results suggest a large welfare loss to try to answer this question we start from the critical arguments of liebowitz and margolis to discuss the theoretical and empirical difficulties of establishing path dependent inefficiency