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

effluent regulation and long run optimality a regulator faced with free entry of firms is concerned not only with the implications of public policy for the discharges from a representative firm but also with the total pollution observed at the long run market equilibrium the regulator must take into account not only the effects of regulations upon the net marginal returns of the firm but must also consider the total profit of the firm and incentives for entry and exit this paper shows that effluent charges and tradeable effluent permits lead to long run optimality with entry of small firms the difference between firm payments and environmental damages is interpreted as the rent accruing to the environmental resource this result applies only to the competitive case with small polluters the analysis presented here allows a comparison and clarification of the literature on small and large polluters in a multi input framework with social damages dependent upon total effluents effluent charges are shown here to result in socially optimal entry confirming an assertion of baumol and oates 2 p 179 fn 161 and the important result of schulze and d arge 15 by taking average as well as marginal damages into account the effluent charge results in optimal firm scale levels and the correct input mix at the free entry market equilibrium the firm subject to an effluent tax will operate above or below the private minimum efficient scale depending upon whether average external costs exceed or are less than marginal external costs since public policy to reduce effluents is often directed at reducing the effluentgenerating activity some policy recommendations include a tax on the final output of the polluting firm in some theoretical analyses a relation between the output of the firm and the effluent level is identified and a pigouvian output tax is applied this approach should not be followed by policymakers since an output tax does not provide firms with the correct incentives for either input substitution or market entry it is shown that while a lump sum transfer is needed to provide correct entry incentives when a pigouvian output tax is applied no such transfer is needed if the tax is correctly applied to effluents contrary to 5 even if optimal firm scale and i thank the referees for helpful suggestions the support of the national science foundation under grant ses 82 19121 is gratefully acknowledged any errors are my responsibility 103

bankable permits for the control of environmental pollution abstract intertemporal trading of emission permits banking is often identified as one of three promising market mechanisms for controlling pollution along with averaging and trading surprisingly the efficiency properties of permit banking systems have not been investigated using a simple optimal control model this paper investigates firms incentives for banking or borrowing emission permits and compares the emission and output streams firms would choose with the socially optimal solution we find that in many cases firms will suboptimally choose excessive damage and output levels in early periods and correspondingly too few in later periods if given the opportunity to freely move emissions between time periods we propose a simple alternative trading scheme we term modified banking that counters this problem and should be no more difficult for an environmental authority to implement than a straigth banking system

a regulatory adjustment process for the determination of the optimal percentage requirement in an electricity market with tradable green certificates abstract a system of tradable green certificates tgcs is a market based subsidy scheme designed to promote electricity generation from renewable energy sources such as wind power under a tgc system the principal policy instrument is the percentage requirement which stipulates the percentage of total electricity production green plus black that must be obtained from renewable sources in this paper we propose a regulatory adjustment process that a regulator can employ to determine the socially optimal percentage requirement explicitly accounting for environmental damages resulting from black electricity generation

renewable energy certificate mechanism in india a preliminary assessment abstract the indian national action plan for climate change napcc envisages several measures to address global climate change one of the important measures identified involves increasing the share of renewable energy in total electricity consumption in the country this would mean napcc envisages renewable energy to constitute approximately 15 of the energy mix of india by 2020 to achieve the target set by the napcc indian ministry of power launched renewable energy certificate rec mechanism in november 2010 however participation in the rec markets is low and recs have failed to attract significant investment so far in this study a preliminary attempt has been made to assess the performance of existing rec mechanism in india after highlighting the salient features of the indian renewable energy policy framework a brief description of renewable purchase obligation rpo and source specific rpos for different states is discussed along with an overview of rec market in india to date the performance of indian rec mechanism is evaluated by cost competiveness decentralized distributed generation and renewable energy portfolio diversity and their effectiveness has also been measured on the basis of the available data although it is difficult to make any conclusive remark on the success or failure of rec mechanism due to its short experience this study examines the process to date to come out with some recommendations which can be used to fine tune the functioning of existing rec market in india for instance rec price bounds should be revised because it has been not explicitly supporting cost competiveness by offering 60 33 higher average price than the existing average feed in tariff fit it is also observed that state wise contribution in registered capacity is skewed towards few states like tamil nadu 27 maharashtra 23 and uttar pradesh 22 which puts pressure on policy makers to restructure the existing rec mechanism

the welfare effects of the introduction of storage this paper examines the welfare effects of introducing storage into a market with stochastic supply in which all agents are competitive profit maximizers with rational expectations these welfare effects are the net result of the initial increase in demand for stock building and the partial and asymmetric reduction in the dispersion of consumption brought about by storage the distributional impacts depend crucially on the information available to producers before storage is introduced the elasticity of supply the specification of the consumption demand curve and the cost of storage

adapt a price stabilizing compliance policy for renewable energy certificates the case of srec markets currently most renewable energy certificate rec markets are defined based on targets that create an artificial step demand function resembling a cliff this target policy produces volatile prices that can make investing in renewables a risky proposition in this paper we propose an alternative policy called adjustable dynamic assignment of penalties and targets adapt that uses a sloped compliance penalty and a self regulating requirement schedule both designed to stabilize rec prices helping to alleviate a common weakness of environmental markets to capture market behavior we model the market as a stochastic dynamic programming problem to understand how the market might balance the decision to use a rec now versus holding it for future periods in the face of uncertain new supply then we present and prove some of the properties of this market and finally we show that this mechanism reduces the volatility of rec prices which should stabilize the market and encourage long term investment in r

an emission saved is an emission earned an empirical study of emission banking for light duty vehicle manufacturers abstract this paper presents results of an empirical study of emission banking for light duty vehicle manufacturers an intertemporal model of manufacturers choices is combined with econometrically estimated abatement cost functions to simulate the cost savings and emission effects of an averaging trading and banking marketable permit system relative to command and control regulations while the cost savings of such a system are estimated to be modest the intertemporal emission effects may be sizable the sensitivity of the results to discount rates abatement cost functions and model specifications is also explored

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

smart srec a stochastic model of the new jersey solar renewable energy certificate market markets for solar renewable energy certificates srecs are gaining in promi nence in many states stimulating growth of the u s solar industry however srec market prices have been extremely volatile causing high risk to participants and potentially less investment in solar power generation such concerns necessitate the development of realis tic flexible and tractable models of srec prices that capture the behavior of participants given the rules that govern the market we propose an original stochastic model called smart srec to fill this role building on established ideas from the carbon pricing liter ature and including a feedback mechanism for generation response to prices we calibrate the model to the new jersey market and backtest it analyzing parameter sensitivity and demonstrating its ability to reproduce historical dynamics finally we run simulations to investigate the role and impact of regulatory parameters thus providing insight into the crucial role played by market design

promotion of market access for renewable energy in the nordic power markets this study investigates how renewable targets for the nordic power market might be achieved at the lowest costs the instruments investigated are fixed feed in tariff economically sound premium based feed in tariff and shadow prices for co2 emissions we utilize a real time price based simulation model in the analysis we show that even with strong assumptions regarding the emission permit price the targeted level of wind power is not reached without feed in tariffs emission trading produces the lowest total emissions but with the highest total costs from the studied instruments the most cost efficient way to reach the targets for wind energy market shares is the premium based feed in tariff this tariff is also the most cost efficient way to reduce co2 emissions

a model of intertemporal emission trading banking and borrowing abstract this paper provides a general treatment of emission trading banking and borrowing in an intertemporal continuous time model using optimal control theory the decentralized behavior of firms is shown to lead to the least cost solution attainable under joint cost minimization explicit solutions for the time paths of emissions and permit prices are derived when firms are allowed to both bank and borrow and when firms are only allowed to bank emission permits the policy implications of emission banking and borrowing are discussed

prices vs quantities public finance and the choice of regulatory instruments abstract since montgomery 1972 markets in licenses and efficient pollution control programs journal of economic theory 5 395 418 and weitzman 1974 prices vs quantities review of economic studies 41 477 491 it has generally been assumed that in a full information setting tradable quotas and taxes are equivalent regulatory instruments we demonstrate that if the government is movitated by public finance concerns this equivalence holds only if quotas are short lived moreover the government prefers quotas with the shortest possible lifetime or what is equivalent in our setting taxes

the political economy of international green certificate markets this paper analyzes the political economy of establishing bilateral trade in green certificate markets as one step towards harmonization of european green electricity support systems we outline some of the economic principles of an integrated bilateral green certificates market and then discuss a number of issues that are deemed to be critical for the effectiveness stability and legitimacy of such a market by drawing on some of the lessons of the fairly recent intentions to integrate a future green certificate market in norway with the existing swedish one we highlight exemplify and discuss some critical policy implementation and design issues these include for instance the system s connection to climate policy targets the role of other support schemes and the definition of what green electricity technologies should be included furthermore the establishment of an international market presumes that the benefits of renewable power e g its impacts on the environment diversification of the power mix self sufficiency etc are approached and valued from an international perspective rather than from a national one thus implying lesser emphasis on for instance employment and regional development impacts a bilateral green certificate system thus faces a number of important policy challenges but at the same time it could provide important institutional learning effects that can be useful for future attempts aiming at achieving greater policy integration in the european renewable energy sector

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

renewable energy certificate markets in india a review abstract in india the national action policy on climate change napcc 1 has set a target of 15 of electricity via renewable energy sources by 2020 to reach these ambitious targets in march 2011 the government of india launched the renewable energy certificates rec a market based mechanism to drive renewable energy development and spur further investments however a look into the actual performance of rec market trading during the first year of operation shows that though volume of trading steadily increased the number of accredited certificates issued was less than 2 5 of the technical rec demand potential indicating that the full potential of the rec markets was far from being realized we critically examine the design and implementation of the rec market in india as well as its effectiveness in meeting the desired objectives in the context of international best practices our analysis of rec market best practices reveals that though forward markets banking and price bounds are recommended for stable markets best of class methods for determining the optimal length of banking the level of floor and forbearance prices and the values of credit vintage multipliers are not fully established we then establish that the main issues with the indian rec markets appear to be demand uncertainty resulting from lack of long term targets absence of clarity on compliance and near absence of long term price signals to investors finally we present an analysis of other important features of the indian rec market in the context of well functioning rec markets such as credit multipliers set asides vintage multipliers and voluntary markets 2013 elsevier ltd

green certificate markets the risk of over investment and the role of long term contracts abstract several papers have recently analyzed the theory and implementation of renewable energy support schemes the case for a renewable electricity standard res in tandem with a tradeable green certificate tgc market has been largely based on efficiency considerations case study evidence is inconclusive in part due to the short track record but is not generally favorable here we reconsider the efficiency case both static and dynamic in light of special characteristics of renewable energy projects we find that when exclusively high fixed cost technologies comprise the eligible technology pool the equilibrium form of contracting obviates the principal efficiency advantages claimed for certificate markets when low fixed cost technologies compete alongside high fixed cost technologies in the certificate market we show that it is likely that long term contracts will disappear and the technological choice will be inefficiently shifted away from the high fixed cost technology we consider evidence from three well developed certificate schemes in britain sweden and texas and find that it is broadly consistent with the theory here

business cycles and emission trading with banking abstract we propose an emission cap adjustment policy for an emission trading system ets that allows banking of allowances for later use and faces business cycle uncertainty the forward looking banking decisions cause a commitment problem with respect to regulator s next period allowance supply decision we tackle the commitment problem by focusing on the markov equilibrium of the policy the equilibrium policy has a surprisingly simple structure combining features from both price and quantity instruments the regulator s ability to choose a new cap for each period does not render banking obsolete but on the contrary makes banking an integral part of the equilibrium policy using data from the eu ets to calibrate the model we solve the markov equilibrium policy for the case of carbon emissions regulation and compare markov policies with and without the possibility to bank allowances a counterfactual analysis of the eu ets during the period of 2009 2013 shows that the optimal markov policy would have led to a steadier allowance price level and a stricter emission regulation than what was actually observed in the eu ets

pollution permit markets with intertemporal trading and asymmetric information abstract we consider the problem of determining the permit discount rate in pollution permit markets in which permits may be traded over time and polluting firms have better information about their abatement costs than does the regulator we show that the preferred permit discount rate may be greater than or less than the money discount rate we also consider whether or not the regulator should allow intertemporal trading to take place allowing intertemporal trading lowers social costs when the slope of the marginal damage function is less than the slope of the aggregate marginal abatement cost function

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

when outcomes are the reflection of the analysis criteria a review of the tradable green certificate assessments abstract the tradable green certificates tgc framework is a prevalent policy support scheme enacted to stimulate investments in electricity from renewable energy sources res e in several countries including sweden and norway the tgc framework is currently under reevaluation in this process academic literature plays a crucial role in reflecting the outcomes of this policy framework the outcomes however are often limited by the analysis criteria which reflect what has been accounted for or disregarded when assessing the performance of the tgc framework the analysis criteria also stress what is considered as a successful outcome given the importance of such criteria this paper presents an extensive and systemic literature review of academic publications assessing the performance of the tgc framework the findings are to provide an overview of the publications analysis criteria and outline their outcomes we also provide descriptive statistics for the publications and examine the average citation record of the publications that use various analysis criteria in order to explore their relative impact on later studies these findings can help policymakers put the assessments into perspective when reevaluating a country s tgc system they also suggest several intriguing directions for future studies in this field

energy affordability and the benefits system in italy abstract in this paper we discuss a number of ways to define and measure the affordability of energy consumption and we examine the emergence of energy poverty in italy in the period from 1998 to 2011 the paper examines the eligibility criteria for claiming the benefits available to support energy consumption for vulnerable families and it identifies the potential beneficiaries the study assesses the appropriateness of the eligibility criteria by comparing the population targeted by the policy with the population actually facing affordability problems a simulation exercise using the hypothetical scenario most likely to result in energy benefits being made available shows that regardless of the affordability index adopted the provision of state energy benefits has little impact on fuel poverty

banking and borrowing in the eu ets a review of economic modelling current provisions and prospects for future design this article deals with the issue of banking and borrowing in the context of the european union emissions trading scheme eu ets by attempting to provide a policy oriented unifying theoretical framework after describing the main features of the eu ets the core part of the article consists of variations of an inter temporal continuous time optimization model additional elements include flexibility measures currently discussed and proposed in other emissions trading systems usa australia which include the use of safety valves minimum price auctioning or offsets from domestic or international projects

competitive storage and commodity price dynamics by buying cheap and selling dear risk neutral commodity speculators can smooth commodity prices and induce serial dependence in price even when none would exist under a simple process of supply and demand commodity prices are variable and strongly positively correlated from one year to the next the variability is often explained by supply factors and the autocorrelation by the activities of speculators we show that this explanation is not consistent with the evidence speculation can substantially increase autocorrelation for prices that are weakly autocorrelated in its absence but not to the high levels that are observed in the data

the role of regulatory uncertainty in certificate markets a case study of the swedish norwegian market abstract price volatility in green certificate markets reflects uncertainty over future prices representing a major source of risk for renewable energy generators price risk is considered the principal deficiency of this market based policy since it causes investors to require higher returns moreover investors are exposed to regulatory risk namely the risk that a change in the regulation will materially impact the certificate price regulatory uncertainty is reflected in market volatility exacerbating certificate price risk using an econometric approach we investigate the role of regulatory changes on price volatility in the swedish certificate market the results of our analysis indicate that regulatory changes strongly affect certificate markets resulting in periods of higher volatility moreover we analyze whether certificate price volatility has changed after creating a joint swedish norwegian market results indicate that the ambivalence surrounding the creation of this bigger market led to a period of increased price volatility between 2010 and 2011 overall this article brings a better understanding of the role of regulatory uncertainty on certificate markets and gives evidence for its negative impact in terms of increased price volatility

price volatility and banking in green certificate markets there is concern that prices in a market for green certificates gcs primarily based on volatile wind power will fluctuate excessively leading to corresponding volatility of electricity prices applying a rational expectations simulation model of competitive storage and speculation of gcs the paper shows that the introduction of banking of gcs may reduce price volatility considerably and lead to increased social surplus banking lowers average prices and is therefore not necessarily to the benefit of green producers proposed price bounds on gc prices will reduce the importance of banking and even of the gc system itself

a unified method of evaluating electoral systems and redistricting plans we derive a unified statistical method with which one can produce substantially improved definitions and estimates of almost any feature of two party electoral systems that can be defined based on district vote shares our single method enables one to calculate more efficient estimates with more trustworthy assessments of their uncertainty than each of the separate multifarious existing measures of partisan bias electoral responsiveness seats votes curves expected or predicted vote in each district in a legislature the probability that a given party will win the seat in each district the proportion of incumbents or others who will lose their seats the proportion of women or minority candidates to be elected the incumbency advantage and other causal effects the likely effects on the electoral system and district votes of proposed electoral reforms such as term limitations campaign spending limits and drawing majority minority districts and numerous others to illustrate we estimate the partisan bias and electoral responsiveness of the u s house of representatives since 1900 and evaluate the fairness of competing redistricting plans for the 1992 ohio state legislature

research on optimal benchmark price of tradable green certificate based on system dynamics a china perspective abstract renewable portfolio standard rps is a compulsory institutional change to achieve low carbon energy transformation in china its success depends on the scientific system quasi parameter design the most important system quasi parameter is the benchmark price of the tradable green certificate tgc setting the benchmark price of tgc scientifically and reasonably in line with china s national conditions is conducive to the effective implementation of rps in china based on the system dynamics sd to construct china s green certificate trading market model this paper analyzes the interaction between the tgc market and the electricity market under the rps and uses vensim simulation to simulate the optimal tgc benchmark price based on the maximization of social welfare the results show that the tgc market and the electricity market are mutually influential as the benchmark price of tgc increases the total power generation increases and the on grid price decreases consumer surplus producer surplus and social welfare all reach the maximum when the tgc benchmark price is 0 4yuan kwh so determines 0 4yuan kwh as the optimal benchmark price of tgc

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