income residential location and mode choice abstract commuters choose a mode defined in terms of trip speed and time to minimize the money and opportunity costs of travel new results the wage rate elasticity of marginal commuting cost may be zero negative greater than one or declining with the wage rate a constant wage rate elasticity is possible only if the marginal money cost of commuting is zero a positive value of the marginal money cost of commuting implicitly assumes mode choice the relationship between income and location seems due largely to technological change in intraurban transportation differences in the money cost of commuting by alternative modes and differences in real wages

marginal land for energy crops exploring definitions and embedded assumptions abstract the idea of using less productive or marginal land for energy crops is promoted as a way to overcome the previous land use controversies faced by biofuels it is argued that marginal land use would not compete with food production is widely available and would incur fewer environmental impacts this term is notoriously vague however as are the details of how marginal land use for energy crops would work in practice this paper explores definitions of the term marginal land in academic consultancy ngo government and industry documents in the uk it identifies three separate definitions of the term land unsuitable for food production ambiguous lower quality land and economically marginal land it probes these definitions further by exploring the technical normative and political assumptions embedded within them it finds that the first two definitions are normatively motivated this land should be used to overcome controversies and the latter definition is predictive this land is likely to be used it is important that the different advantages disadvantages and implications of the definitions are spelled out so definitions are not conflated to create unrealistic expectations about the role of marginal land in overcoming biofuels land use controversies

a critical appraisal of the effectiveness of uk perennial energy crops policy since 1990 abstract energy crops are cultivated primarily for bioenergy production but can also have wider benefits to agriculture and the environment policies put in place in the uk and europe have promoted bioenergy and the growth of energy crops despite the various policy support mechanisms the cultivation of perennial energy crops has proceeded at a low rate this study rigorously analyses some of the key uk bioenergy policies since 1990 to assess why perennial energy crops have not fulfilled their potential the uk energy crops market is scrutinised and shows the industry is still nascent compared to government aspirations case studies of both successful and unsuccessful projects are evaluated to reveal how effective different policies have been in establishing uk perennial energy crops this original review shows significantly that none of the projects initiatives or schemes described can be viewed as an absolute success the main obstacles that have hindered progress include the lack of long term supportive energy crops policy the failure of headline projects and organisations the lack of competitiveness of long term perennial crop options compared to annual crops bureaucracy of schemes over ambitious projects and large scale support schemes tending to favour imported biomass rather than support domestic supply 25 years of failed energy crops policy suggests there needs to be a long term strategy future support for the sector must join up policy between different government departments to recognise multi functional benefits of perennial energy crops support mechanisms could aim to provide a competitive advantage for local supply and use and improve management of cashflows during establishment the risk burden should be shared between suppliers and end users smaller scale projects using established technologies are required with energy crops introduced in a phased manner supply side measures need to be balanced with demand side incentives to link supply with end user markets

is the post fossil era necessarily post capitalistic the robustness and capabilities of green capitalism abstract our central target is to show that capitalism is not only much more robust to crises than presumed by its critics but also features promising capabilities with regard to solving the environmental crisis to elaborate this thesis we analyse how far capitalism can survive given the end of fossil energy carriers and may maintain its productivity under the preconditions of a regenerative energy system in a further step we demonstrate that crises may actually provide the prerequisites of the economy s transformation towards sustainability we argue that especially competitive capitalism as analysed by schumpeter offers excellent preconditions for generating environmental innovations however we will also point out the numerous social problems of green infrastructure projects in the last section we assume that markets alone will not suffice to concertedly solve the global environmental crisis here political action is needed that pools societal forces with regard to the ecological challenges hence specifically promoting desirable innovations the usefulness of state measures is to be judged in correlation to the respective specific national political and economic contexts a generalised opposition to capitalistic social orders disregards the complexity of these contexts and is at danger of omitting decisive determinants of crisis management

exploring the determinants of emerging bioenergy market participation abstract individual biomass producers will play a strong role in the emergence of robust and sustainable bioenergy markets research on what drives their participation however is substantial but fragmented despite a recognition of producer heterogeneity there have also been few comparative analyses of drivers of bioenergy market participation across feedstock types producer groups and geographic regions through narrative review and network analysis the following review of the bioenergy market participation literature generates both an increased appreciation of how bioenergy market participation is assessed in existing research and how social network analysis may be further employed as a tool for literature review across 41 studies selected for qualitative review and a subset of 22 selected for quantitative review the analysis reaches two central conclusions the first pertains to the findings of the literature itself suggesting that a variety of non production objectives structural and social constraints and market related attributes influence bioenergy market participation decisions a second conclusion is that the assessment of these factors varies significantly across the literature for both user group and feedstock type further examination of the individual variables within these segments of the literature as well as of authorship patterns across them suggests that this variation may rise from differences in the subject matter itself and not from differing perspectives of the researchers undertaking the work should disparities in the literature be reflective of actual socio economic differences in their respective markets policies or programs targeted to individual feedstock types or user groups may be more effective in encouraging participation than uniform national policy initiatives

an analysis of policy scenario effects on the adoption of energy production on the farm a case study in emilia romagna italy abstract the agriculture sector s contribution to energy production is a central issue in ongoing policy debates and one of the central elements of the development of bioeconomy sector the common agricultural policy cap is one of the main determinants of the different farm strategies of european farmers the cap is now undergoing a thorough revision process which necessarily includes a debate of the role of the policy in rural areas and the effectiveness of the various cap policy mechanisms the objective of this paper is to assess the impact of alternative cap scenarios in the light of the possible changes in 2013 and the willingness to adopt energy plants for energy crops in the province of bologna italy this is pursued using both survey information and farm household mathematical programming models hence using stated intentions and simulated profitability to analyse the adopt of new technologies for energy production the results underscore the relevance of the cap scenarios in altering intentions with regard to the adoption of energy production and the relevant effect of uncertainty in delaying the diffusion of energy production systems

determinants of technical efficiency in the bioenergy industry in the eu28 region most previous bioenergy industry research has concentrated on how to implement a certain level of yield however few articles have paid attention to rational resource allocation to increase efficiency to enhance bioenergy production through proper use of available resources this study identified the effects of internal country specific and external macroeconomic determinants of technical efficiency level in the bioenergy industry for the eu28 region the study was established based on a conceptual framework suggesting a correlation between input use and level of technical efficiency a panel data analysis method was employed for the analysis and a panel regression analysis framework based on the fixed effect fe model and random effect re model was used to examine the potential determinants of technical efficiency level in the bioenergy industry for the eu28 region for the period between 1990 and 2013 the results indicate that the technical efficiency level of the bioenergy industry in developing countries is higher than in developed countries the empirical findings also suggest that technical efficiency has greater influence on pure technical efficiency levels capital input labor input gross domestic product inflation and interest rate significantly affected the technical efficiency of the bioenergy industry in the developing and developed countries in the eu28 region during the period of this study the findings clearly call for regulators and decision makers to review the technical efficiency level of the bioenergy industry within the eu28 region this study also provides better information and guidance to the boards of the bioenergy industry as they need to have a clear understanding of the influence technical efficiency has on bioenergy production performance moreover the results of this study have implications for investors who focus mainly on profits from their investments

transforming the energy sector the evolution of technological systems in renewable energy technology this paper analyses the development and diffusion of technologies that utilize renewable energy sources in germany sweden and the netherlands the analysis enlarges the life cycle model of industry evolution to one where the focus is on the formation and evolution of new technological systems particular focus is on explaining success and failures in shifting from a formative phase into one characterized by positive feedbacks a set of challenges is identified for policy makers attempting to influence the process of transforming the energy sector

sense of place geographic discounting by people animals and plants abstract people animals and plants seem to consistently prefer to distance themselves from objects they fear and draw close to things that they desire i present an argument for ecologists and economists which allows them to capture this behavior in a simple way i offer some evidence for how such behavior occurs and how to include it in specific formulation of environmental policy models

no bubble condition model free tests in housing markets we test for the existence of housing bubbles associated with a failure of the transversality condition that requires the present value of payments occurring infinitely far in the future to be zero the most prominent such bubble is the classic rational bubble we study housing markets in the united kingdom and singapore where residential property ownership takes the form of either leaseholds or freeholds leaseholds are finite maturity pre paid and tradeable ownership contracts with maturities often exceeding 700 years freeholds are infinite maturity ownership contracts the price difference between leaseholds with extremely long maturities and freeholds reflects the present value of a claim to the freehold after leasehold expiry and is thus a direct empirical measure of the transversality condition we estimate this price difference and find no evidence of failures of the transversality condition in housing markets in the u k and singapore even during periods when a sizable bubble was regularly thought to be present

the value of ideal contingency markets in agriculture an incomplete markets equilibrium in which no contingency markets are available is compared to a complete markets equilibrium formed by introducing a futures market and a crop insurance market the two regimes are compared using comparative static and welfare analyses numerical examples highlight important characteristics of the model and illustrate how the effects of introducing contingency markets can be quantified the main conclusions are that contingency markets in agriculture increase economic efficiency but there is no guarantee that farmers and consumers both benefit it is found that futures and crop insurance markets may reduce farmer welfare when the demand for farm products is price inelastic

the bubble game an experimental study of speculation we propose a bubble game that involves sequential trading of an asset commonly known to be valueless because no trader is ever sure to be last in the market sequence the game allows for a bubble at the nash equilibrium when there is no cap on the maximum price we run experiments both with and without a price cap structural estimation of behavioral game theory models suggests that quantal responses and analogy based expectations are important drivers of speculation

what drives people s opinions of electricity infrastructure empirical evidence from ireland abstract across the eu significant infrastructure investment is needed in both generation from renewable energy sources res and the electricity grid to meet the european targets on emission reduction and res expansion experiences show however that citizens may object to new energy infrastructure in their localities which may cause delays in achieving the targets to avoid delays it is crucial to understand what drives people s opinions to explore people s opinions of different electricity generation and transmission technologies in ireland we conducted a nationally representative survey concerning the drivers we distinguish between socio demographics technology specific perceptions and energy policy preferences our results show that people generally have positive views of res technologies while this indicates that irish citizens agree to move towards cleaner electricity sources we find reluctance amongst people to have these technologies located close to their places of residence we find that across most technologies the tradeoff people make between economic and environmental policy objectives drives their opinions of and their tendencies to oppose technology developments the significance of most socio demographic variables however is largely technology dependent this highlights that policy makers need to understand how people make tradeoffs between policy objectives and how these tradeoffs relate to their opinions of different technologies

patterns of acceptance and non acceptance within energy landscapes a case study on wind energy expansion in austria abstract wind energy is a key technology in the transition toward a low carbon society but acceptance is considered to be a constraining factor in achieving ambitious wind deployment targets based on an austrian case study this paper investigates eight decisive patterns of acceptance and non acceptance of wind energy we apply qualitative research methods such as interviews focus groups and worldcafe discussions with stakeholders on the national level and with citizens and local decision makers at potential wind power expansion sites the results show that local opposition to wind energy cannot be explained by single factors but is caused by a complex set of individual and collective preferences rooted in institutional and socio political arrangements the problem concerning these conflicting patterns is that they are trapped in often opposing or confronting policy core beliefs which are unlikely to change hence it is necessary to appeal to overarching targets like the claims of environmental justice to counterbalance the impacts of wind energy we conclude that there is a strong demand for fair decision making processes and an equal distribution of environmental and economic gains and losses this article is part of a virtual special issue entitled the collaborative making of energy landscapes

effect of distance on the preservation value of water quality in the past dozen years an extensive body of literature has developed on the willingness to pay for water quality in particular its recreation use and nonuse preservation values this paper illustrates a procedure for estimating the effect of distance on the preservation value of environmental quality using the contingent valuation approach the case considered is the potential degradation of water quality due to coal mining activity in the flathead river drainage system montana the analysis supports a negative association for this particular study area the effect of distance on preservation value was considered both directly and indirectly through its effect on visits 36 references 2 tables

the political economy of urban transport system choice this paper analyzes the political economy of transport system choice with the goal of gaining an understanding of the forces involved in this important urban public policy decision transport systems pose a continuous trade off between time and money cost so that a city can choose a fast system with a high money cost per mile or a slower cheaper system the paper compares the socially optimal transport system to the one chosen under the voting process focusing on both homogeneous and heterogeneous cities while considering different landownership arrangements the analysis identifies a bias toward underinvestment in transport quality in heterogeneous cities

the effect of distance on willingness to pay values a case study of wetlands and salmon in california most contingent valuation studies in the literature utilized a pre determined geographic market area for their sample frame in other words they did not include variables that would measure the extent of the geographic areas over which to aggregate willingness to pay these studies implicitly assumed that the effects of geographic distance were moot an assumption that could have led to an understatement of the aggregate benefit values computed in these studies the overall goal of this study was to determine if distance affects willingness to pay for public goods with large non use values the data used came from a contingent valuation study regarding the san joaquin valley ca respondents were asked about their willingness to pay wtp for three proposed programs designed to reduce various environmental problems in the valley a logit model was used to examine the effects of geographic distance on respondents willingness to pay for each of the three programs results indicate that distance affected wtp for two of the three programs wetlands habitat and wildlife and the wildlife contamination control programs we calculate the underestimate in benefits if the geographic extent of the public good market is arbitrarily limited to one political jurisdiction

an empirical and forecasting analysis of the bioenergy market in the eu28 region evidence from a panel data simultaneous equation model this study improves upon and applies a comprehensive panel data simultaneous equation model to the european union eu28 region s bioenergy market the goals are to estimate bioenergy quantities in domestic and international markets for the period from 1990 to 2013 and to apply a forecasting analysis for the eu28 s domestic and international bioenergy markets for the period of 2014 2020 the results demonstrate that biomass harvest and the domestic price in a domestic market have a significant influence on the supply function additionally domestic price has a negative relationship with the bioenergy market domestic demand in international markets competitive import prices play a primary role in the development of the bioenergy market import demand export prices and gdp also have primary influences on the export demand for bioenergy moreover the exchange rate has a positive and significant effect on export demand the results of a forecasting analysis for the future period of 2014 2020 has predicted slight increases in domestic supply domestic demand and import trends on the other hand it also predicted a sharp decline in the export demand trend between those same years this study contributes to the literature by providing policymakers and other energy policy stakeholders a reliable forward looking analysis of the potential condition of the domestic and international bioenergy markets in the eu28 region through the end of 2020

nimby or not exploring the relevance of location and the politics of voiced opinions in renewable energy siting controversies local protests against renewable energy facilities have added fuel to the debate about the so called nimby not in my back yard effect this paper identifies six variables that can hamper the comparison between different public perception studies and offers two broad conclusions on aggregate proximity does have strong influence on public attitudes to proposed projects but the nature strength and spatial scale of this effect may vary according to local context and value of the land residents of stigmatised places are more likely to welcome facilities that are relatively green while people who derive a more positive sense of identity from particular rural landscapes are likely to resist such potential developments especially if they also live there secondly the fear of being branded a nimby and the positive ethics associated with the notion of renewable are both likely to colour the responses of many interviewees these aspects need to be clarified and accounted for in analyses of elicited responses both quantitative and qualitative if we are to improve our understanding of the social construction of individual attitudes in siting conflicts

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

optimal combination of energy crops under different policy scenarios the case of northern greece energy crops production is considered as environmentally benign and socially acceptable offering ecological benefits over fossil fuels through their contribution to the reduction of greenhouse gases and acidifying emissions energy crops are subjected to persistent policy support by the eu despite their limited or even marginally negative impact on the greenhouse effect the present study endeavors to optimize the agricultural income generated by energy crops in a remote and disadvantageous region with the assistance of linear programming the optimization concerns the income created from soybean sunflower proxy for energy crop and corn different policy scenarios imposed restrictions on the value of the subsidies as a proxy for eu policy tools the value of inputs costs of capital and labor and different irrigation conditions the results indicate that the area and the imports per energy crop remain unchanged independently of the policy scenario enacted furthermore corn cultivation contributes the most to ifncome maximization whereas the implemented cap policy plays an incremental role in uptaking an energy crop a key implication is that alternative forms of motivation should be provided to the farmers beyond the financial ones in order the extensive use of energy crops to be achieved

innovation and policy for bioenergy in the uk a co evolutionary perspective de laurentis c innovation and policy for bioenergy in the uk a co evolutionary perspective regional studies this paper analyses the role of niche innovation and regime interaction in the field of renewable energy in the uk adopting a co evolutionary approach and a dynamic multilevel perspective on system innovation it investigates niches development in the uk in the field of bioenergy and its interaction with the current energy regime contributing to the debate about spatial scales at which sustainability transitions can be conceptualized the paper utilizes the case of niche development in the region of wales to provide supporting evidence of the importance of context specific social and political relations that may foster or hinder regime transformation

taking stock of the local impacts of community owned renewable energy a review and research agenda abstract a growing literature suggests that community owned renewable energy cre projects have the potential to deliver a range of environmental and local socio economic benefits there is relatively little empirical evidence to substantiate this with few systematic efforts to assess social and environmental impacts or to understand the context in which given impacts arise in this paper we review and conceptualise the local impacts commonly cited in the literature and dissect the empirical evidence currently available to support their occurrence having assessed the quality of evidence and pinpointed knowledge gaps we draw on methodological literature to identify approaches necessary to improve our understanding of the local impacts of cre and explore their patterns of occurrence we find a lack of robust survey and statistical evidence across all the seven impact categories identified of the impacts identified empowerment and access to affordable energy are found to be the least studied in addition several impacts are associated only with specific types of community energy projects we argue that the paucity of consistent evidence for direct impacts associated with the development processes and direct outcomes of projects suggests that the most substantial local impacts result from medium to long term indirect project outcomes and the investment of project revenues in the local community as such collective funding pools and negotiation processes around their distribution towards private versus public goods play a crucial role in determining transformative local impacts of cre

income volatility of energy crops the case of rapeseed abstract the adoption of energy crops may generate significant benefits from reduced foreign energy dependence improved rural economies and achieved environmental goals nevertheless important issues arise as these crops are strongly competed by other presumably more standard uses of farmland and their choice will be restrictive unless profit becomes a powerful motive for farmers the abolishment of specific policies supporting first generation biofuels gives rise to the question whether the tactic of bioenergy land use change is just to be abandoned by european farmers the present paper endeavours to evaluate the reduction in income volatility in the case of the rapeseed energy crop a cultivation extensively used in biofuels in the european union employing the concept of entropy the results provide a vague picture regarding the limitations in rapeseed income volatility among the european member states consequently the issue of income uncertainties as a determinant of bioenergy cropland demand has been left pending the innovation of the study lies in the use of entropy concept and the kapetanios and shin unit root test in the case of income volatility for energy crops in the european context the estimation of the random components with the assistance of auto regressive integrated mean average models may provide a tool for confining income uncertainties with the assistance of other policy schemes including insurances within the common agricultural policy

the networked minority how a small group prevailed in a local windfarm conflict abstract this paper aims to explain through a qualitative case study how a small protest group prevailed during a local windfarm conflict in south eastern australia a social capital analytical framework was developed to analyse the data the analysis found that two communities inhabited the area for which the windfarm development was proposed the public participation process failed to address the concerns of both communities and led to the emergence of a social network of resistance the network had high stocks of bridging social capital which enabled an effective protest that led to the abandonment of the development their effectiveness was inadvertently aided by the windfarm supporters who were unable to act collectively to defend their interests because socio economic changes in the community among other factors had led to a depletion of their social capital in this context different democratic participatory processes were needed to address the concerns of the two communities guidance and tools for researching and developing the types of participatory processes needed for vulnerable communities with low social capital and those similar to the social network with high social capital are provided these will inform community appropriate public participation processes and participatory planning policy

contract theory and implications for perennial energy crop contracting abstract this article provides an overview of modern contract theory and discusses the implications of the theory for contracting for perennial dedicated energy crops we discuss some of the unique challenges of contracting for dedicated energy crops used for the production of advanced biofuels and survey some of the relevant concepts and research from the contract theory literature to address these challenges we focus primarily on the mechanism design or complete contracts approach to contracting which involves optimizing some objective function e g profits costs etc with respect to contract terms subject to important incentive constraints the solution to these optimization problems typically highlight important tradeoffs that a contract designer needs to consider in order to maximize profits and or minimize costs

public estimates of support for offshore wind energy false consensus pluralistic ignorance and partisan effects abstract meeting future energy demands will require large scale implementation of renewable energy projects if one of these energy sources offshore wind becomes a common sight off coastlines consideration of local public opinion and action will be critical previous research from the social sciences has lacked depth in examining the underlying factors that shape public opinion towards offshore wind development the current research brings a new perspective to the literature by showing that how members of the public perceive support among others relates to their own opinions of offshore wind energy we report results from two surveys the first focused on opinion formation relating to offshore wind in general among new england residents while the second focused on a specific offshore wind project in rhode island we find evidence that both supporters and opponents of offshore wind underestimate levels of support among others indicating a pluralistic ignorance effect and false consensus effect respectively we also find distinct patterns of perceived support among self identified republicans and democrats the findings hold important implications for policymakers and developers in understanding the nature of public support and opposition for offshore wind energy particularly with respect to individuals willingness to publicly engage with offshore wind projects

social acceptance of renewable energy innovation an introduction to the concept this paper introduces the special issue on social acceptance of renewable energy innovation it is a collection of best papers presented at an international research conference held in tramelan switzerland in february 2006 while there are ambitious government targets to increase the share of renewable energy in many countries it is increasingly recognized that social acceptance may be a constraining factor in achieving this target this is particularly apparent in the case of wind energy which has become a subject of contested debates in several countries largely due to its visual impact on landscapes this paper introduces three dimensions of social acceptance namely socio political community and market acceptance factors influencing socio political and community acceptance are increasingly recognized as being important for understanding the apparent contradictions between general public support for renewable energy innovation and the difficult realization of specific projects the third dimension market acceptance has received less attention so far and provides opportunities for further research particularly from management scholars

impact of perennial energy crops income variability on the crop selection of risk averse farmers abstract the uk government policy is for the area of perennial energy crops in the uk to expand significantly farmers need to choose these crops in preference to conventional rotations for this to be achievable this paper looks at the potential level and variability of perennial energy crop incomes and the relation to incomes from conventional arable crops assuming energy crop prices are correlated to oil prices the results suggests that incomes from them are not well correlated to conventional arable crop incomes a farm scale mathematical programming model is then used to attempt to understand the affect on risk averse farmers crop selection the inclusion of risk reduces the energy crop price required for the selection of these crops however yields towards the highest of those predicted in the uk are still required to make them an optimal choice suggesting only a small area of energy crops within the uk would be expected to be chosen to be grown this must be regarded as a tentative conclusion primarily due to high sensitivity found to crop yields resulting in the proposal for further work to apply the model using spatially disaggregated data

simple finite horizon bubbles robust to higher order knowledge an asymmetric information model of a finite horizon nth order rational asset price bubble is presented where all agents know that n the asset is worthless also the model has only two agents so the first order version of the bubble is simpler than other first order bubbles in the literature

non users willingness to pay for a national park an application and critique of the contingent valuation method bateman i j and langford i h 1997 non users willingness to pay for a national park an application and critique of the contingent valuation method reg studies 31 571 582 a great deal of the ongoing academic debate concerning the contingent valuation cv method has focused upon whether or not the method is suitable for assessing non use values this paper presents results from a study examining non users values for preserving the norfolk broads a wetland area of recognized international importance from the threat of saline flooding discussion of results centres upon the validity of the cv method for eliciting unbiased estimates of non use value a graphical representation of findings from a variety of studies is presented to suggest that such results are logically ordered across goods and valuation scenarios however as the paper concludes logicality and validity are not necessarily synonymous bateman i j et langford i h 1997 la volonte des non usagers de payer les parcs nationaux

local mobilisation against windfarm developments in spanish rural areas new actors in the regulation arena the region of valencia has a marked territorial duality an urbanised populated and high income coastal line and mountain and depressed inland rural areas this territorial duality also derives in a functional duality so that market and regulation drivers seem to assign rural areas specific roles for the provision of raw materials energy water and the like one of the clearest examples can be found in the design and development of the wing energy plan passed by the regional government in 2001 which designated areas for the installation of windmills however this regulation has resulted in an outstanding emergence of associations that have organised at several levels from the local to the national as a strong opposition movement to the local developments of the plan with this background the objective of this paper is to analyze from a set of case studies the processes of emergence and the evolution of collective actors associations which have been arising in many rural areas as a response to the local applications of the wind energy plan attention will be paid to understand the tactics used the process of adaptation to the participation mechanisms and the role played by local and non local networks

is brazilian wind power development sustainable insights from a review of conflicts in ceara state abstract brazil s wind energy program is a successful public private sector response to an electricity supply crisis in 2001 that created an attractive target for investors in renewable power but evidence is accumulating that environmental impacts which lead to territorial conflicts livelihood erosion and political responses contradict sustainability claims of wind power development we synthesize conflicts emerging in coastal ceara state a pioneer in brazil s rapid development of wind power environmental impacts caused by wind farms which locate on dune fields and other coastal systems create conflicts by denying traditional communities access to resources that sustain livelihoods and cultural identities resource access conflicts produce political responses that seek mitigation measures but may escalate into a wider political challenge to continued development of wind power we highlight the importance of land tenure policies to assure the territorial integrity of traditional communities in areas targeted for wind power implementation analysis of conflicts supports suggested solutions for governments firms and traditional communities that may be applied in other developing countries and may help investors and planners avoid future conflicts

farm level constraints on the domestic supply of perennial energy crops in the uk abstract there are a number of estimates of the land area that could potentially be dedicated to perennial energy crops such as short rotation coppice src willow and miscanthus in the uk but little is known about how farmers will respond to the opportunities presented by these relatively novel crops perennial energy crops face competition from other arguably more flexible uses of farmland and if not seen as attractive propositions to individual farmers they will not be grown farmers decisions are therefore a key constraint on potential supply this paper reviews the policy background and considers whether policy is based on any consideration of likely supply response before presenting outcomes of focus groups composed of farmers who already grow or are considering growing perennial energy crops there appear to be a number of barriers to adoption in addition to concerns over the security of contracts the current high wheat price increases the opportunity cost of committing land to perennial energy crops there are also worries about the impact of willow roots on field drains and the cost of returning the land to other uses this paper outlines a number of issues of importance to policy makers and suggests future research needs

on fragility of bubbles in equilibrium asset pricing models of lucas type abstract in this paper we study the existence of bubbles for pricing equilibria in a pure exchange economy a la lucas with infinitely lived homogeneous agents the model is analyzed under fairly general assumptions no restrictions either on the stochastic process governing dividends distribution or on the utilities possibly unbounded are required we prove that the pricing equilibrium is unique as long as the agents exhibit uniformly bounded relative risk aversion a generic uniqueness result is also given regardless of agent s preferences a few pathological examples of economies exhibiting pricing equilibria with bubble components are constructed finally a possible relationship between our approach and the theory developed by santos and woodford on ambiguous bubbles is investigated the whole discussion sheds more insight on the common belief that bubbles are a marginal phenomenon in such models journal of economic literature classification numbers c61 c62 d51 g12

public attitudes regarding large scale solar energy development in the u s abstract using data collected from both a national sample as well as an oversample in u s southwest we examine public attitudes toward the construction of utility scale solar facilities in the u s as well as development in one s own county our multivariate analyses assess demographic and socio psychological factors as well as context in terms of proximity of proposed project by considering the effect of predictors for respondents living in the southwest versus those from a national sample we find that the predictors and impact of the predictors related to support and opposition to solar development vary in terms of psychological and physical distance overall for respondents living in the u s southwest we find that environmentalism belief that developers receive too many incentives and trust in project developers to be significantly related to support and opposition to solar development in general when southwest respondents consider large scale solar development in their county the influence of these variables changes so that property value race and age only yield influence differential effects occur for respondents of our national sample we believe our findings to be relevant for those outside the u s due to the considerable growth pv solar has experienced in the last decade especially in china japan germany and the u s

the adoption of switchgrass and miscanthus by farmers impact of liquidity constraints and risk preferences lignocellulosic biomass is expected to become a key feedstock for renewable energy production however the potential supply strongly depends on farmers willingness to grow the new perennial energy crops many economic assessments have been led at the farm level all based on the standard net present value approach this paper looks into the effect of farmers liquidity constraints and risk preferences on switchgrass and miscanthus adoption by farmers we study the problem of the land allocation between a traditional cropping system and an innovative one in a static framework using four intertemporal choice models we find that in central france agronomic and economic conditions switchgrass and miscanthus result to be less profitable in terms of annualised net margin than the usual rape wheat barley rotation nevertheless they can be highly competitive as diversification crops when appropriate contracts are offered to farmers despite the additional liquidity they require

estimating the net implicit price of energy efficient building codes on u s households abstract requiring energy efficiency building codes raises housing prices or the monthly rental equivalent but theoretically this effect might be fully offset by reductions in household energy expenditures whether there is a full compensating differential or how much households are paying implicitly is an empirical question this study estimates the net implicit price of energy efficient buildings codes iecc 2003 through iecc 2006 for american households using sample data from the american community survey 2007 a heteroskedastic seemingly unrelated estimation approach is used to estimate hedonic price house rent and energy expenditure models the value of energy efficiency building codes is capitalized into housing rents which are estimated to increase by 23 25 percent with the codes however the codes provide households a compensating differential of about a 6 47 percent reduction about 7 71 in monthly energy expenditure results indicate that the mean household net implicit price for these codes is about 140 87 per month in 2006 dollars 163 19 in 2013 dollars however this estimated price is shown to vary significantly by region energy type and the rent gradient

rational asset pricing bubbles this paper provides a fairly systematic study of general economic conditions under which rational asset pricing bubbles may arise in an intertemporal competitive equilibrium framework our main results are concerned with nonexistence of asset pricing bubbles in those economies these results imply that the conditions under which bubbles are possible including some well known examples of monetary equilibria are relatively fragile this paper is concerned with the conditions under which asset prices in an intertemporal competitive equilibrium are equal to the present value of the streams of future dividends to which each asset represents a claim according to a central result of the theory of finance this is very generally true in the case of economies with trading at only a finite sequence of dates as long as there are no restrictions upon transactions other than that associated with possible incom pleteness of the set of securities that are traded the result is sometimes called the fundamental theorem of asset pricing here we consider the extent to which such a result continues to be valid in the case of trading over an infinite horizon it has often been observed in the econometric literature on asset pricing bubbles that it is possible in principle for the price of a perpetuity and the dividends on that security to satisfy at all times a present value relation for one period holding returns while the security s price nonetheless does not equal the present value of the stream of dividends expected over the infinite future in such a case the price of the perpetuity is said to involve a bubble component 2 joint stochastic processes for which this component is nonzero are sometimes argued to characterize existing assets for a recent example see froot and obstfeld 1991 but such an inference depends upon aspects of the stochastic

public preferences for alternative electricity mixes in post fukushima japan abstract using representative household survey data from japan after the fukushima accident we estimate peoples willingness to pay wtp for renewable nuclear and fossil fuels in electricity generation we rely on random parameter econometric techniques to capture various degrees of heterogeneity between the respondents and use detailed regional information to assess how wtp varies with the distance to both the nearest nuclear power plant and to fukushima compared to fossil fuels we find a positive wtp for renewable and a negative wtp for nuclear fuels these effects in absolute terms increase with the proximity to fukushima

current and future financial competitiveness of electricity and heat from energy crops a case study from ireland abstract it has been demonstrated that miscanthus and willow energy crop cultivation could be economically competitive with current agricultural land uses at a farm gate biomass price ranging from 70 to 130 t 1 dry matter styles d thorne f jones m b in review energy crops in ireland an economic comparison of willow and miscanthus production with conventional farming systems biomass and bioenergy may 2006 this paper uses the same farm gate prices to calculate the economic competitiveness of energy crop electricity and heat production using a net present value npv approach 20 year period 5 discount rate direct and gasified co firing of willow wood with coal would result in electricity generation 30 or 37 more expensive than coal generation at current coal and co 2 allowance prices and a farm gate biomass cost of 100 t 1 break even co 2 allowance prices are 33 and 37 t 1 respectively however co firing of miscanthus with peat is close to economic competitiveness and would require a co 2 allowance price of 16 t 1 to break even against a current price of 12 t 1 npv analyses indicate that wood heat is significantly cheaper than oil gas or electric heat excluding existing wood boiler installation subsidies discounted annual savings range from 143 compared with gas to 722 compared with electric heating at the domestic scale and from 3454 to 11 222 at the commercial scale inclusion of available subsidies improves the comparative economics of domestic wood heat substantially the economic advantage of wood heat is robust to variation in fuel prices discount rates and heat loads the greatest obstacles to energy crop utilisation include i a reluctance to consider long term economics ii possible competition from cheaper sources of biomass iii the need for a spatially coordinated supply and utilisation network

modelling farmer uptake of perennial energy crops in the uk abstract the uk biomass strategy suggests that to reach the technical potential of perennial energy crops such as short rotation coppice src willow and miscanthus by 2020 requires 350 000 hectares of land this represents a more than 20 fold increase on the current 15 546 hectares previous research has identified several barriers to adoption including concerns over security of income from contracts in addition farmers perceive returns from these crops to be lower than for conventional crops this paper uses a farm level linear programming model to investigate theoretical uptake of energy crops at different gross margins under the assumption of a profit maximising decision maker and in the absence of known barriers to adoption the findings suggest that while src willow at current prices remains less competitive returns to miscanthus should have encouraged adoption on a wider scale than at present this highlights the importance of the barriers to adoption recently announced contracts for miscanthus appear to offer a significant premium to farmers in order to encourage them to grow the crops this raises the question of whether a more cost effective approach would be for government to provide guarantees addressing farmers concerns including security of income from the contracts such an approach should encourage adoption at lower gross margins

does green consumerism increase the acceptance of wind power abstract in this paper we discuss what might be termed an action based learning approach to promoting important pro environmental actions such as support for or acceptance of environmental policy such an approach involves promoting simple and easy behaviours as entry points for more radical steps towards sustainability referred to as catalytic or wedge behaviours despite the obvious need for innovative approaches to promote important pro environmental behaviour and sound theoretical backing for such concepts there is a lack of research testing the key propositions of this approach in a survey study based on a random sample of residents of the state of maine usa we find that both everyday green behaviour and the acceptance of an expansion of wind power are rooted in environmental concern and that everyday green behaviour gives a significant contribution to predicting acceptance of wind power when controlling for environmental concern hence the promotion of everyday green behaviours may prepare the grounds for increasing acceptance of more far reaching changes in the population such as an expansion of wind power

intangible capital relative asset shortages and bubbles abstract purely technological factors can be a fundamental force behind the emergence of asset price bubbles in developed economies we analyze an economy in which the production technology utilizes both physical and intangible capital where the latter cannot be used as collateral for borrowing technological change in the form of increased importance of intangible capital in production sharpens the borrowing constraints of entrepreneurs leading to a scarcity of high yield assets relative to low yield ones this can create the conditions for asset bubbles additionally due to the financial frictions standard dynamic efficiency tests are not valid and bubbles are not pareto improving

urban economic theory land use and city size this book examines the economic reasons why people choose to live where they live and develops through analysis of the bid rent function a unified theory of urban land use and city size the first part of the book explicates the basic theory of urban land use and optimal city size residential location behavior of households is examined in a microeconomic framework and equilibrium and optimal patterns of residential land use are discussed the corresponding equilibrium and optimal city sizes are studied in a variety of contexts part two extends the classical theories of von thunen and alonso with the addition of externality factors such as local public goods crowding and congestion and racial prejudice the rigorous mathematical approach and theoretical treatment of the material make urban economic theory of interest to researchers in urban economics location theory urban geography and urban planning

social acceptance of low carbon energy and associated infrastructures a critical discussion the promotion of low carbon energy and associated infrastructures for tackling climate change is a central task for governments worldwide however public and mainly local opposition to those infrastructures may slow down or even halt that process thus in the last few years a body of research has developed specifically to understand the social acceptance of technologies such as wind turbines or bioenergy plants we argue that the use of acceptance in this literature should be further discussed we contend that using the word acceptance may present some constraints for the theoretical advancement of this area of research and to the implications that may be taken from it to the wider society this is further highlighted through the presentation of findings from surveys conducted with nationally representative samples from the uk and norway which examined their acceptance of and support for new high voltage power lines we conclude by suggesting that the literature on public responses towards low carbon energy and associated infrastructures should be more critical in the conceptualisation of its research agenda become empirically more consistent and transparent and examine other types of relations between people and energy infrastructures besides acceptance or opposition

bubbles and persuasion with uncertainty over market sentiment abstract recent empirical studies suggest that during times of unexpected innovation agents heterogeneously update their beliefs about an asset fundamental value and are uncertain of other agents beliefs about it in this paper i show that when there is uncertainty over the market sentiment defined as other investors beliefs about an asset fundamental value market manipulation can act through a previously unconsidered channel by misleading agents learning on the market sentiment this novel type of market manipulation could strengthen existing financial bubbles or even give rise to new ones

how geographic distance and political ideology interact to influence public perception of unconventional oil natural gas development a growing area of research has addressed public perception of unconventional oil and natural gas development via hydraulic fracturing fracking we extend this research by examining how geographic proximity to such extraction interacts with political ideology to influence issue support regression analysis of data from a fall 2013 national telephone survey of united states residents reveals that as respondents geographic distance from areas experiencing significant development increases political ideology becomes more strongly associated with issue support with the liberal partisan divide widening our findings support construal level theory s central premise that people use more abstract considerations like political ideology the more geographically removed they are from an issue we discuss implications for studying public opinion of energy development as well as for risk communication

the influence of a renewable energy feed in tariff on the decision to produce biomass crops in ireland abstract a target of 30 per cent substitution of biomass for peat in the three peat fired power stations from 2015 has been set by the irish government however a knowledge gap exists on the extent to which irish farmers would actually choose to grow these crops an extension of the renewable energy feed in tariff refit scheme to include the co firing of biomass with peat in electricity generation would enable the power stations to enter into power purchase agreements ppas these offer a fixed price to farmers for biomass feedstock the decision to adopt biomass is represented as a constrained problem under certainty with the objective of profit maximisation the results showed that the price offered under a ppa has a large effect on the economic returns from biomass crops the price that the power stations previously estimated they would be able to pay at 46 and 48 per tonne for willow and miscanthus respectively was used as a starting point at this price the number of farmers who would choose to adopt biomass production is insufficient to achieve the national co firing target the target could be achieved at 70 and 65 per tonne for willow and miscanthus respectively

switching to perennial energy crops under uncertainty and costly reversibility we study a farmer s decision to convert traditional cropland into land for growing dedicated energy crops taking into account sunk conversion costs and uncertainties in crop returns the optimal decision rules differ significantly from the expected net present value rule which ignores uncertainties and from real options models that allow only one way conversion into energy crops these models also predict drastically different patterns of land conversions into and out of energy crops over time using corn soybean rotation and switchgrass as examples we show that the model predictions are sensitive to assumptions about stochastic processes of the returns government policies might have unintended consequences subsidizing conversion costs into switchgrass may not much affect proportions of land in switchgrass in the long run

economic evaluation of short rotation coppice systems for energy from biomass a review abstract since economic profitability is the most important factor for the adoption of short rotation coppice src for energy from biomass our objective was to analyze and summarize published knowledge about the economic evaluation of src of 37 studies 43 reported economic viability of src in comparison to a reference system whereas 19 stated economic disadvantages of src and 38 reported mixed results depending on the underlying assumptions we found a wide variety of underlying assumptions underlying costs process chains and methods used to evaluate src systems of the 37 studies 8 used static approaches of capital budgeting 84 used dynamic approaches and 8 applied approaches in which uncertainties were taken into account due to the long term nature of investment in src and therewith the uncertain development of sensitive assumptions approaches which consider uncertainties were best suited for economic evaluation the profitability of src was found to be most sensitive to the price for biomass and biomass yield but site specific biomass data was lacking despite the wide variation within each cost unit costs for land rent harvesting chipping and establishment consistently made up the largest proportion of overall costs and should therefore be chosen carefully we close with suggestions for improving the economic evaluation of src and enhancing traceability and comparability of calculations

should central banks burst bubbles some microeconomic issues anti bubble policy is examined in a finite horizon greater fool bubble model with rational agents asymmetric information and short sales constraints this permits the use of standard tools of welfare economics to analyse bubble policies policy is modelled as deflating overpriced assets by revealing information about this overpricing if the central bank is following such a policy then the market interprets inaction as an implicit endorsement of asset prices which raises these prices also the central bank can deflate overpriced assets even if it has no informational advantage over any investors about this overpricing however unless it has such an informational advantage a bubble bursting rule may only make things worse

finite bubbles with short sale constraints and asymmetric information abstract we present a finite period general equilibrium model of an exchange economy with asymmetric information we say that a rational expectations equilibrium exhibits a strong bubble if the price is higher than the dividend with probability one we show that necessary conditions for a strong bubble to occur are that 1 each agent must have private information in the period and state in which the bubble occurs 2 each agent must be short sale constrained at some period in the future with positive probability and 3 agents trades are not common knowledge we present examples of bubbles when the necessary conditions are satisfied journal of economic literature classification numbers c72 d52 d82 d84 g12 g14

the influence of perceived uncertainty on entrepreneurial action in emerging renewable energy technology biomass gasification projects in the netherlands emerging renewable energy technologies cannot break through without the involvement of entrepreneurs who dare to take action amidst uncertainty the uncertainties that the entrepreneurs involved perceive will greatly affect their innovation decisions and can prevent them from engaging in innovation projects aimed at developing and implementing emerging renewable energy technologies this article analyzes how perceived uncertainties and motivation influence an entrepreneur s decision to act using empirical data on biomass gasification projects in the netherlands our empirical results show that technological political and resource uncertainty are the most dominant sources of perceived uncertainty influencing entrepreneurial decision making by performing a dynamic analysis we furthermore demonstrate that perceived uncertainties and motivation are not stable but evolve over time we identify critical factors in the project s internal and external environment which influence these changes in perceived uncertainties and motivation and describe how various interactions between the different variables in the conceptual model internal and external factors perceived uncertainty motivation and previous actions of the entrepreneurs positively or negatively influence the decision of entrepreneurs to continue entrepreneurial action we discuss how policymakers can use these insights for stimulating the development and diffusion of emerging renewable energy technologies

on information and market dynamics the case of the u s beef market abstract the paper investigates the nature of dynamic prices and expectations in a competitive market the approach is applied to the u s beef market which exhibits cyclical patterns and significant biological lags in the production process beef price equations are estimated under different expectation regimes the empirical results indicate the presence of heterogeneous price expectations with a significant number of market participants neglecting information about the existence of a beef cycle

evaluating options for the future energy mix of japan after the fukushima nuclear crisis the fukushima nuclear accident in march 2011 has increased social and political reluctance to embrace nuclear power in japan and elsewhere the japanese government has thus been considering four possible future energy mixes including a nuclear free pathway and three others with 10 35 nuclear supply coupled with a larger proportion of renewable energy and fossil fuels to replace nuclear here we use multi criteria decision making analysis mcdma to assess the potential negative economic levelised cost of electricity and energy security environmental greenhouse gas emissions land transformation water consumption heated water discharge air pollution radioactive waste and solid waste and social safety issues impacts of the four proposed pathways to determine which scenario most holistically minimises adverse future outcomes the nuclear free pathway has the highest overall potential for adverse outcomes score 2 49 out of 3 and the 35 nuclear power supply option yielding the lowest negative impact score 0 74 without weightings despite some sensitivity to the choice of criterion weights our analyses demonstrate clearly that from an empirical perspective a nuclear free pathway for japan is the worst option to pursue we recommend that mcdma methodology we used for japan can be applied to other countries to evaluate future electricity generation scenarios

geographic proximity to coal plants and u s public support for extending the production tax credit abstract the production tax credit ptc is an important policy instrument through which the federal government promotes renewable energy development in the united states however the efficacy of the ptc is hampered by repeated expirations and short term extensions and by the general uncertainty surrounding its future status we examine the factors driving variation in public support for the extension of the ptc using a nationally representative internet based survey americans living near a coal fired power plant are significantly more likely to support extending the ptc than are their peers who are more insulated from the externalities of burning coal the evidence for this dynamic was strongest and most statistically significant among subjects experimentally primed to think about the adverse health effects of burning coal raising awareness of the public health ramifications of generating electricity from fossil fuels holds the potential to increase support for renewable energy policies among those living in proximity to coal plants even in a highly politicized policy debate

the willingness of farmers to engage with bioenergy and woody biomass production a regional case study from cumbria abstract in this paper we explore the willingness of cumbrian farmers to switch land use from food production to biomass production in a landscape where food production is both heavily subsidised and the area is a centre for tourism this is against a policy background of a switch of subsidies from food production to environmental benefits increased concerns about emissions from farming and an increased demand for renewable energy we identified an awareness of new markets for renewable energy alongside increasing volatility of other crops against a background of increasing demand for food from this our conclusions are that the main short term opportunities for increasing biomass production in this region are through intensifying management of existing woodlands in the medium term as the financial case for biomass crops becomes more certain we can envisage a tipping point which would favour a switch from marginal agricultural land to biomass

from malthus to sustainable energy theoretical orientations to reforming the energy sector abstract the main purpose of this article is to consider macro level theories for understanding the urge for reform as well as the process of societal change both in general terms and more specifically within the energy sector the aim is also to consider the energy sector in a wider context and analyse its recent development as a potential part of this reform the scope and logical framework of this article is the following the state of the global environment is approaching a point where the whole of humankind is in danger the article reviews and discusses humankind s limits of existence and dialectics of the human nature relationship by contrasting malthusian and boserupian theoretical views this creates both practical and scientific needs the long societal process of change is discussed according to the three layer 3l model of societal chance the production of energy has traditionally been one of the core issues concerning the effect humankind has on the environment and with regards to potential change related to it reforming the energy sector is in a key position this article reviews and discusses the way the already established renewal of the energy sector corresponds to the 3l model and the diverse potentials of the anticipated further progress

viability of ccs a broad based assessment for malaysia abstract climate change is fast becoming the major environmental and energy concern worldwide there is a major dilemma between the continued reliance on fossil fuel for our energy supply and the pressing need to address the problem of greenhouse gas ghg emissions from combustion process this paper reviews the potential for carbon capture and storage ccs as a part of the climate change mitigation strategy for the malaysian electricity sector using a technology assessment framework the nation s historical trend of high reliance on fossil fuel for its electricity sector makes it a prime candidate for ccs adoption the suitability and practicality of the technology was reviewed from a broad perspective with consideration of malaysia specific conditions it is apparent from this assessment that ccs has the potential to play an important role in malaysia s climate change mitigation strategy provided that key criteria are fulfilled

economic evaluation of miscanthus production a review this paper reviews the peer reviewed literature dealing with the economics of miscanthus cultivation to identify factors influencing the adoption of miscanthus and to reveal shortcomings in research in total 51 studies have been identified for this review the majority of these publications are recent i e the majority is published after 2009 and concern case studies in europe particularly the uk and ireland and north america this review reveals that the economic viability of miscanthus depends on largely uncertain assumptions especially concerning yields 10 48 t dry matter per ha and prices 48 134 t dry matter but also concerning the lifespan 10 20 years and different cost items a lack of established markets high establishment costs and uncertainties arising to a large extent from the long term commitment are identified as major barriers to miscanthus adoption in addition the level of support for miscanthus production e g via subsidies is identified as crucial for miscanthus profitability but is found to be highly heterogeneous across countries next to diversity in agronomic and economic assumptions also the assessment criteria and research techniques used to investigate the profitability of miscanthus differ widely while the net present value criterion was most frequently used we identify a lack of approaches that account for risks and uncertainties which seem to potentially play a critical role in the uptake of miscanthus by farmers

undesirable facilities and property values a summary of empirical studies abstract undesirable land uses are expected to impose health or amenity risks on surrounding communities these risks are expected to be translated economically into negative effects on adjacent property values these negative effects may be present even when such uses possess offsetting advantages of proximity such as employment opportunities the purpose of this study is to summarize empirical studies completed to date that test whether undesirable land uses have observable negative effects on adjacent property values this information may be useful in assessing minimum valuations of terminating undesirable land uses such as clean up of hazardous sites or compensation necessary to ameliorate the economic impacts of new undesirable uses

the streetcar and residential location in nineteenth century philadelphia the alonso muth model predicts how a worker s income affects his residential location within an urban area workers choose a residential location balancing the lower rent at locations distant from the city center against the higher commuting cost that such locations entail if the income elasticity of housing demand is greater than that of marginal commuting cost the bid rent function of a high wage worker is flatter than that of a low wage worker and thus the high wage worker lives farther from the city center this theory which was first articulated in the 1960s was consistent with empirical evidence from that period the model did not fare so well in the 1970s and 198os however on one hand were new studies of housing demand polinsky and ellwood 20 pointed out biases in earlier studies and found income elasticities less than unity when these biases were corrected these results indicate that the income elasticity of housing demand is less than that of marginal commuting cost since the latter is typically close to unity which in turn implies that the bid rent function of a high wage worker is steeper than that of a low wage worker wheaton 25 provided more direct evidence on this point he estimated bid rent functions of different income groups and found no significant difference between those of higher and lower income households these studies suggested that the alonso muth model could not explain the residential pattern observed in the 1950s and 1960s on the other hand was the change in that pattern in the 197os upper income households began to return to the cities the so called

uk innovation systems for new and renewable energy technologies drivers barriers and systems failures abstract a better understanding of the systemic processes by which innovation occurs is useful both conceptually and to inform policy making in support of innovation in more sustainable technologies this paper analyses current innovation systems in the uk for a range of new and renewable energy technologies and generates policy recommendations for improving the effectiveness of these innovation systems although incentives are in place in the uk to encourage innovation in these technologies system failures or gaps are identified in moving technologies along the innovation chain preventing their successful commercialisation sustained investment will be needed for these technologies to achieve their potential it is argued that a stable and consistent policy framework is required to help create the conditions for this in particular such a framework should be aimed at improving risk reward ratios for demonstration and pre commercial stage technologies this would enhance positive expectations stimulate learning effects leading to cost reductions and increase the likelihood of successful commercialisation