from long term targets to cumulative emission pathways reframing uk climate policy abstract in march 2007 the eu reaffirmed its commitment to making its fair contribution to global mean surface temperatures not exceeding 2 c above pre industrial levels in line with this the uk government has laid legal foundations for an emissions cut of 60 by 2050 whilst 2050 reductions dominate the target setting agenda long term targets do not have a scientific basis and are leading to dangerously misguided policies if a policy is to be scientifically credible it must be informed by an understanding of cumulative emissions and associated emissions pathways this analysis of current uk climate policy illustrates how following the correlation trail from global temperature thresholds to national emissions pathways fundamentally reframes the uk s targets considering cumulative emissions carbon cycle feedbacks and the omission of emissions from international transport dramatically increases both the scale and immediacy with which emissions need to be reduced for example within the uk 6 9 p a reductions beginning as early as 2012 the implications of this are stark society can no longer await the decadal timeframes necessary for a transition to low carbon energy supply if the 2 c threshold is to maintain any meaningful currency industrialised nations have little option but to radically and urgently curtail their demand for energy

competitive coupon targeting with the advent of panel data on household purchase behavior and the development of statistical procedures to utilize this data firms can now target coupons to selected households with considerable accuracy and cost effectiveness in this article we develop an analytical framework to examine the effect of such targeting on firm profits prices and coupon face values we also derive comparative statics on firms optimal mix of offensive and defensive couponing the number of coupons distributed redemption rates face values and incremental sales per redemption among our findings when rival firms can target their coupon promotions at brand switchers the outcome will be a prisoner s dilemma in which the net effect of targeting is simply the cost of distribution plus the discount given to redeemers

energy transitions in small scale regions what we can learn from a regional innovation systems perspective the prevalent theories in the debate on sustainability transitions have been criticised for not sufficiently addressing energy change processes at the local level this paper aims to enhance our understanding of local energy reorganisation processes drawing on the regional innovation systems ris approach we argue that local development dynamics result from the interaction of various subsystems science politics public administration industry finance intermediaries and civil society the analysis of the involved subsystems and their interaction shows how energy transitions are shaped by different individual and organisational actors as well as institutions on the local level empirical evidence from case studies on the german cities of emden and bottrop illustrates our theoretical conceptualisation of energy transitions we conclude by presenting characteristic interaction patterns for energy transition drawn from the two cases

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

energy transition poverty and inequality in vietnam this paper investigates energy transition energy poverty and energy inequality in vietnam employing a longitudinal dataset of a nationally representative household survey we use the data on residential energy expenditure of more than 9 000 households over the period 2004 2016 we find a transition from traditional energy to modern energy but this transition varies across regions between ethnic and welfare groups and between rural and urban population the poor and ethnic minority households still rely heavily on traditional energy sources such as coal and biomass to meet their energy demands electricity poverty has decreased but energy cost poverty has increased in addition energy inequality tends to decrease at a more significant rate than income and consumption inequalities we propose a national program for energy poverty alleviation be established to devise policies to lower households energy costs further assistance to the poor and ethnic minority households is also recommended so that they can afford a higher level of electricity consumption

multi dimensional screening a user s guide abstract multi dimensional screening models have many potential applications but economists have so far been hindered by the considerable technical difficulties involved in their resolution this paper studies the simplest formulation of the general screening model and we provide a complete solution to this case we then show how this model can be applied to multi product nonlinear pricing and to multi product monopoly regulation finally we discuss how the model has been applied to other economic situations of interest including auction design and optimal taxation

governing the transition to natural gas in mediteranean metropolis the case of cairo istanbul and sfax tunisia recent scholarship on urban energy governance has focused on low carbon energy strategies seen as a response to climate change and energy pressure threats but such approaches tend to overlook the situations of cities from the global south and emerging countries concerned with strong energy demand growth the development of urban natural gas networks is an understudied response to such a challenge focusing on three cities istanbul cairo and sfax tunisia the article analyses the factors and the governance of these energy transitions it uses a geographical approach to such processes that highlight the mutual influence of the territory in its material and political dimensions and of the policy goals and tools in the implementation the development of urban gas networks rests upon the proximity of gas deposits it is determined by metropolitan strategies for economic development as well as by programs aiming to cut energy subsidies though urban gas networks have a strong potential for restructuring the physical and social landscapes in cities the dominant commercial approach taken by energy utilities and morphological constraints in the urban fabric limit their universalization natural gas is part of a mix of energies at the urban level and often competes with other energy forms specifically renewables like solar water heaters lastly the development of urban natural gas networks sparks heated politics in relation to unfulfilled energy demand and affordability

competitive price discrimination we model firms as supplying utility directly to consumers the equilibrium outcome of competition in utility space depends on the relationship u between profit and average utility per consumer public policy constraints on the deals firms may offer affect equilibrium outcomes via their effect on u f rom this perspective we examine the profit utility and welfare implications of price discrimination policies in an oligopolistic framework we also show that an equilibrium outcome of competitive nonlinear pricing when consumers have private information about their tastes is for firms to offer efficient two part tariffs

energy poverty policies in the eu a critical perspective abstract once confined to the uk context where it was struggling to receive political recognition for years the concept of energy or fuel poverty is slowly entering the eu s agenda where it has crept into a number of regulatory documents and policy proposals using evidence gathered from an international workshop and semi structured interviews with decision makers experts and advocacy activists in brussels and sofia this paper explores the adoption of policies aimed at addressing energy poverty within i the organisational context of the eu and ii national state institutions in bulgaria a member state facing considerable problems at the energy affordability social inequality nexus while the former are largely nascent and poorly co ordinated the latter have already been implemented de jure to a significant extent however many unresolved issues surrounding their de facto implementation remain at the same time national policy makers remain largely unaware of the existence of direct energy poverty related initiatives at the eu level

lost in transition comparing strategies of electricity companies in delhi this paper examines the notion of energy transition when implemented by private utilities in 2000 the delhi government privatized electricity distribution to three private distribution companies most research was concerned with the impact of privatization on energy reliability tariff settings and regulation issues this paper looks at two under researched themes the expansion of services to poorer neighborhoods and the rollout of clean energy policies this focus allows to unpack the materiality of socio technical systems to analyze how energy infrastructures are being technically deployed on the ground and to identify which social approach is used to detail the specific practices of each company provides a more nuanced and accurate understanding of the reform in depth analysis of the three private utilities show that they interpret the reform mandate differently they use a varied range of technical tools they respond differently to social concerns in poorer neighborhoods and they have distinctive internal management choices and corporate cultures all these four factors can strengthen or undermine the transition towards increased access and clean energy

towards a low carbon economy coping with technological bifurcations with a carbon tax abstract technological learning is understood as an endogenous mechanism for the diffusion of advanced clean energy technologies technological learning is quite uncertain previous research showed that an optimization model with uncertain technological learning could generate technological bifurcations various local optimal solutions of technology development strategies with very similar total costs but different environmental impacts with a simplified energy system optimization model this paper explores technological bifurcations and the effect of a carbon tax on the development and diffusion of new energy technologies with a three stage analysis the main findings of this paper are 1 that technological learning instead of its uncertainty is an essential mechanism for technological bifurcations and 2 a carbon tax can reduce carbon emission but not necessarily technological bifurcations an implication from these findings is that with a carbon tax there still could be potential for other policy interventions to reduce carbon emissions without much additional cost

geographies of energy transition space place and the low carbon economy this paper makes a case for examining energy transition as a geographical process involving the reconfiguration of current patterns and scales of economic and social activity the paper draws on a seminar series on the geographies of energy transition security climate governance hosted by the authors between 2009 and 2011 which initiated a dialogue between energy studies and the discipline of human geography focussing on the uk government s policy for a low carbon transition the paper provides a conceptual language with which to describe and assess the geographical implications of a transition towards low carbon energy six concepts are introduced and explained location landscape territoriality spatial differentiation scaling and spatial embeddedness examples illustrate how the geographies of a future low carbon economy are not yet determined and that a range of divergent and contending potential geographical futures are in play more attention to the spaces and places that transition to a low carbon economy will produce can help better understand what living in a low carbon economy will be like it also provides a way to help evaluate the choices and pathways available

the verticality of policy mixes for sustainability transitions a case study of solar water heating in china abstract climate change and sustainable development are the defining challenges of the modern era the field of sustainability transitions seeks systematic solutions for fundamental transformations of socio technical systems towards sustainability and exploring the role of policy mixes has been a central research agenda within the field in the extant literature there exists a lack of both conceptual and empirical research on the vertical dimension of policy mixes for sustainability transitions this study provides a multilevel and evolutionary interpretation of the vertical interactions of policy mixes in the process of industrial path development towards sustainability transitions an exemplary case of solar water heating swh technology in shandong province in china is presented capturing both the bottom up and top down processes of interactions on the one hand urban level policy initiatives can inform higher level policymaking on the other hand national level priorities can greatly configure policy strategies for lower level governments moreover as the industry matures the interactions of multilevel policy mixes evolve from simpler unidirectional patterns to more complex bidirectional ones through a vertical policy learning feedback mechanism this study generates two important policy implications that extend beyond the chinese context first dynamic vertical interactions between multilevel governments indicate the need to develop more nuanced perspectives on the design of policy mixes second policy makers need to hold a more dynamic view of policy mixes by recognizing their temporal and coevolutionary nature through the policy learning process

shale gas policy in the united kingdom an argumentative discourse analysis shale gas has become an energy policy priority in the united kingdom in light of profitable extraction activities in the united states since 2012 the coalition government has created key economic drivers to encourage shale exploration whilst growing activism in affected site communities has stirred significant media and academic commentary this study examines the growing national debate as a matter of discourse adopting an argumentative discourse analytic approach to assess data collected from stakeholder interviews n 21 and key policy actor statements quoted in broadsheet newspapers we explore three dominant storylines emerging in relation to shale gas policy 1 cleanliness and dirt concerns the relative framing of the environmental benefits and harms of shale gas 2 energy transitions pathways and diversions concerns geographic metaphors of transitions to carbon intensive and low carbon energy systems and 3 geographies of environmental justice concerns divisions of economic benefit distribution environmental impact and procedural fairness we find that central government policy rhetoric emphasises economic development regulatory oversight and distribution of benefits to site communities whilst minimising discussion of the implications of shale gas for anthropogenic climate change the role of these discourses in influencing shale gas policy is discussed

regional distribution of photovoltaic deployment in the uk and its determinants a spatial econometric approach abstract photovoltaic pv panels offer significant potential for contributing to the uk s energy policy goals relating to decarbonisation of the energy system security of supply and affordability the substantive drop in the cost of panels since 2007 coupled with the introduction of the feed in tariff fit scheme in 2010 has resulted in a rapid increase in installation of pv panels in the uk from 26 5mwp in 2009 to over 5gw by the end of 2014 yet there has been no comprehensive analysis of the determinants of pv deployment in the uk this paper addresses this gap by employing spatial econometrics methods to a recently available data set at a fine geographical detail following a traditional regression analysis a general to specific approach has been adopted where spatial variations in the relationships have been examined utilising the spatial durbin model using the cross sectional data relating to the uk nuts level 3 data empirical results indicate that demand for electricity population density pollution levels education level of households and housing types are among the factors that affect pv uptake in a region moreover lagrange multiplier test results indicate that the spatial durbin model may be properly applied to describe the pv uptake relationship in the uk as there are significant regional spillover effects

price discrimination and social welfare studies the effect of price discrimination on social welfare using methods from duality theory features of the reservation model presented quasi linear utility and consumers surplus upper and lower bounds on welfare change bounds on welfare change with optimal price discrimination from ebsco

competitive price discrimination strategies in a vertical channel using aggregate retail data we explore opportunities for targeted pricing for a retailer that only tracks weekly store level aggregate sales and marketing mix information we show that it is possible using these data to recover essential features of the underlying distribution of consumer willingness to pay knowledge of this distribution may enable the retailer to generate additional profits from targeting by using choice information at the checkout counter in estimating demand we incorporate a supply side model of the distribution channel that captures important features of competitive price setting behavior of firms this latter aspect helps us control for the potential endogeneity generated by unmeasured product characteristics in aggregate data the channel controls for competitive aspects both between manufacturers and between manufacturers and a retailer despite this competition we find that targeted pricing need not generate the prisoner s dilemma in our data this contrasts with the findings of theoretical models due to the flexibility of the empirical model of demand the demand system we estimate captures richer forms of product differentiation both vertical and horizontal as well as a more flexible distribution of consumer heterogeneity

energy supply security and geopolitics a european perspective the security of energy supply to the eu is examined in the context of two storylines markets and institutions exemplifies an economically and politically integrated multilateral world with effective institutions and markets regions and empires involves a world broken up in rival political and economic blocks competing for resources and markets via political economic and military power it is shown that these storylines have a significant impact on the development of the energy market on the way in which energy supply may be secured and on the effect and applicability of the several types of instruments available the current eu is geared towards enlargement and a deepening of economic integration based on the tenets of the post 1945 multilateral world system the present world tends towards regions and empires and suggests that the eu may have to reorient its energy security policy energy policy must become an integral part of eu external trade and foreign relations and security policy the eu should develop its own strategy actively investing in dialogues with producer countries in the persian gulf and africa and with russia sustainable prosperity and governance in these regions will support eu energy security

urban energy transition in china insights from trends socioeconomic drivers and environmental impacts of beijing abstract the coal dominated energy structure has not only fueled china s rapid economic development but also brought great pressure on china promoting energy transition is among the great challenges for china as one of the most developed megacities in china beijing promotes energy transition intensively in this study we explored the trends socioeconomic drivers and environmental impacts of the energy transition process in beijing during the decades we found that beijing s energy transition has gone through four typical stages after a parallel growth between the economy and coal dominated energy consumption at beginning the growth rate of energy consumption has gradually slowed down since 1996 between 2000 and 2007 the energy structure became relatively balanced and diversified driven by the changes of energy intensity energy structure and final demand composition along with the economic structure s shift from heavy manufacturing to service thereafter economic development was seriously decoupled from direct energy consumption and the de coal trend had made remarkable achievements so2 and nox emissions have declined significantly since 2007 diversified energy structure based on the de coal trend cleaner energy and economic restructuring promotes energy transition meanwhile the feasibility of implementation also should be considered in other cities energy transition process in china

do immigrant inflows lead to native outflows we use 1980 and 1990 census data for 119 larger metropolitan statistical areas to examine the effect of skill group specific immigrant inflows on the location decisions of natives in the same skill group and on the overall distribution of human capital to control for unobserved skill group specific demand factors our models include lagged mobility flows of natives over the 1970 80 period we also estimate instrumental variables models that use the fraction of mexican immigrants in 1970 to predict skill group specific relative immigrant inflows over the 1980s despite wide variation across cities in the size and relative skill composition of immigrant population changes we find no evidence of selective out migration by natives we conclude that immigrant inflows exert a direct effect on the relative skill composition of cities cities that have received relatively unskilled immigrant flows have experienced proportional rises in the size of their unskilled populations this abstract was borrowed from another version of this item

network effects and the dynamics of migration and inequality theory and evidence from mexico international migration is costly and initially only the middle class of the wealth distribution may have both the means and incentives to migrate which can increase inequality in the sending community however the migration networks formed lower the costs for future migrants which can in turn lower inequality this paper shows both theoretically and empirically that wealth has a nonlinear effect on migration and then examines the empirical evidence for an inverse u shaped relationship between emigration and inequality in rural sending communities in mexico after instrumenting we find that the overall impact of migration is to reduce inequality across communities with relatively high levels of past migration we also find some suggestive evidence for an inverse u shaped relationship among communities with a wider range of migration experiences

introduction to the special issue urban energy governance local actions capacities and politics introduction to a special issue showing how there is much to be gained for deeper understandings of energy policy from a specifically urban analysis of rationales forms and repercussions of energy systems in transition the special issue offers an in depth examination of the variety of urban responses to quite distinctive and sometimes competing energy related challenges

renewable energy and geopolitics a review this article reviews the literature on the geopolitics of renewable energy it finds that while the roots of this literature can be traced back to the 1970s and 1980s most of it has been published from 2010 onwards the following aggregate conclusions are extracted from the literature renewable energy has many advantages over fossil fuels for international security and peace however renewable energy is thought to exacerbate security risks and geopolitical tensions related to critical materials and cybersecurity former hydrocarbon exporters will likely be the greatest losers from the energy transition many of the reviewed publications share some weaknesses a failure to define geopolitics an unwarranted assumption that very little has been published in the field previously limited use of established forecasting scenario building or foresight methodologies a lack of recognition of the complexity of the field a lack of theorisation most authors do not distinguish between the geopolitical risks associated with different types of renewable energy and only a few distinguish clearly between the geopolitics of the transitional phase and the geopolitics of a post energy transition world a disproportionately large part of the literature is dedicated to critical materials and cybersecurity while only a small part concerns the decline of former fossil fuel powers among those publications that do discuss the decline of fossil fuels there is also an over focus on oil producers and a lack of attention to the countries that rely heavily on coal for example australia china germany indonesia poland and the united states

native internal migration and the labor market impact of immigration this paper presents a theoretical and empirical study of how immigration influences the joint determination of the wage structure and internal migration behavior for native born workers in local labor markets using data from the 1960 2000 decennial censuses the study shows that immigration is associated with lower in migration rates higher out migration rates and a decline in the growth rate of the native workforce the native migration response attenuates the measured impact of immigration on wages in a local labor market by 40 to 60 per cent depending on whether the labor market is defined at the state or metropolitan area level

dynamic pricing when to entice brand switching and when to reward consumer loyalty this article develops a theory of dynamic pricing in which firms may offer separate prices to different consumers based on their past purchases brand preferences over two periods are described by a copula admitting various degrees of positive dependence when commitment to future prices is infeasible each firm offers lower prices to its rival s customers when firms can commit to future prices consumer loyalty is rewarded if preference dependence is low but enticing brand switching occurs if preference dependence is high our theory provides a unified treatment of the two pricing policies and sheds light on observed practices across industries

transition to a post carbon society linking environmental justice and just transition discourses abstract the hunter valley in new south wales australia is a globally significant coal mining and exporting region the hunter economy s strong basis in fossil fuel production and consumption is challenged by civil society campaigns employing environmental justice discourses this paper analyses how two civil society campaigns in the hunter region stop t4 and groundswell have countered the regional hegemony of fossil fuel interests from an environmental justice perspective however the discursive dominance of the jobs versus environment frame hinders efforts to build solidarity amongst local environmental justice goals on the one hand and workers and union aspirations for secure quality jobs on the other long term structural decline of global coal markets adds pressure for economic transition we argue that campaigns to open up possibilities for transition away from fossil fuel dependency to a post carbon society can be strengthened by engaging with the just transition discourses that are typically associated with organised labour doing so can create synergy for social change by aligning community and labour movement interests inclusive social movement partnerships around this synergy must address structural disadvantage that creates social and economic insecurity if communities are to prevail over the fossil fuel sector s hegemony

global changes in residential energy consumption abstract the residential energy sector is crucial to achieving co2 emission reductions as it has an important energy saving potential and its environmental controls are difficult to displace to other countries using the latest available data this short paper provides a concise analysis of residential energy consumption trends for the period 1993 2013 in a double perspective by main world regions and by per capita gross national income levels in 2013 residential energy has been divided into three types non renewable direct renewable and indirect renewable annual rates of change energy intensity energy in per capita terms and some ratios have been analyzed notable regional differences and trends were observed in the studied variables therefore different energy policies are recommended for the regions eastern and southern asian countries the eu15 and other developed countries are the regions which should make the greatest effort to reduce residential energy consumption the promotion of direct and indirect renewable energies is recommended

rethinking the area approach immigrants and the labor market in california abstract a framework that uses a constant elasticity of substitution ces production function with skill differentiation and integrated national labor markets has predictions for the employment effect of immigrants at the local level the employment rather than wage response to immigration by skill in a state reveals the production substitutability complementarity between native and immigrant labor this in turn reveals the degree to which immigrants stimulate or depress the demand for native labor to estimate this elasticity i use a novel instrument based on demographic characteristics of total central american migrants or of the mexican population to predict immigration by skill level within california looking at immigration to california between 1960 and 2005 these estimates support the assumption of a nationally integrated labor market by skill and they support the hypothesis that natives and immigrants in the same education experience group are not perfectly substitutable this explains the counter intuitive fact that there is a zero correlation between immigration and wage and employment outcomes of natives in the state

third degree price discrimination in oligopoly all out competition and strategic commitment price discrimination by imperfectly competitive firms may intensify competition leading to lower prices for all consumers the tradeoff of consumer groups welfare that is characteristic of monopolistic discrimination need not arise this escalation of competition may make firms worse off and as a result firms may wish to avoid the discriminatory outcome under conditions similar to those in which unambiguous price and welfare effects may arise unilateral commitments not to price discriminate including the adoption of everyday low pricing or no haggle policies may raise firm profits by softening price competition

spatially uneven development and low carbon transitions insights from urban and regional planning the ageing of existing energy system infrastructure the threat of climate change and uncertainty in the movement of energy prices have resulted in a widespread agreement on the need for a transition to a low carbon energy system yet the nature of this transition i e what when how and where and its socio economic outcomes at different scales are not well understood the interdependence of the energy sector and economic growth has been mostly studied at the national level via some general equilibrium or econometric models whilst sub national studies at community or urban levels mostly focus on the governance of transitions hence we suggest that a regional perspective to energy policy and research promises to integrate these two approaches by providing a more robust and comprehensive understanding of the implications of low carbon transitions as well as contributing to the development of more effective policies by building on recent ideas on geographical aspects of energy transitions this article offers insights on the changing relationship between the spatial organisation of economic activities and energy systems and identifies tools and methods from urban and regional planning to help with the delivery of efficient and equitable policy outcomes

co2 content of electricity losses abstract countries are implementing policies to develop greener energy markets worldwide in europe the 2030 energy and climate package asks for further reductions of green house gases renewable sources integration and energy efficiency targets but the polluting intensity of electricity may be different in average than when considering market inefficiencies in particular losses and therefore the implemented policy must take those differences into account precisely herein we study the importance in terms of co2 emissions the extra amount of energy necessary to cover losses with this purpose we use spanish market and system data with hourly frequency from 2011 to 2013 our results show that indeed electricity losses significantly explain co2 emissions with a higher co2 emissions rate when covering losses than the average rate of the system additionally we find that the market closing technologies used to cover losses have a positive and significant impact on co2 emissions when polluting technologies coal or combined cycle close the market the impact of losses on co2 emissions is high compared to the rest of technologies combined heat and power renewables or hydropower to the light of these results we make some policy recommendations to reduce the impact of losses on co2 emissions

scenario analysis of china s emissions pathways in the 21st century for low carbon transition china s growing demand for energy and its dependence on coal has seen its carbon emissions increase more than 50 since 2000 within the debate about mitigating global climate change there is mounting pressure for emerging economies like china to take more responsibility for reducing their carbon emissions within a post 2012 international climate change policy framework for china this leads to fundamental questions about how feasible it is for the country to shift away from its recent carbon intensive pattern of growth this paper presents some general results of scenarios that have been developed to investigate how china might continue to develop within a cumulative carbon emissions budget the results show how changes in the key sectors of the chinese economy could enable china to follow four different low carbon development pathways each of which complies with a cumulative emissions constraint each scenario reflects different priorities for governmental decision making infrastructure investments and social preferences having compared the key features of each scenario the paper concludes with some implications for chinese government policy

energy sprawl land taking and distributed generation towards a multi layered density the transition from fossil fuels to renewable resources is highly desirable to reduce air pollution and improve energy efficiency and security many observers are concerned however that the diffusion of systems based on renewable resources may give rise to energy sprawl i e an increasing occupation of available land to build new energy facilities of this kind these critics foresee a transition from the traditional fossil fuel systems towards a renewable resource system likewise based on large power stations and extensive energy grids a different approach can be taken to reduce the risk of energy sprawl and this will happen if the focus is as much on renewable sources as on the introduction of distributed renewable energy systems based on micro plants photovoltaic panels on the roofs of buildings micro wind turbines etc and on multiple micro grids policy makers could foster local energy enterprises by introducing new enabling rules making more room for contractual communities simplifying the compliance process proposing monetary incentives and tax cuts we conclude that the diffusion of innovation in this field will lead not to an energy sprawl but to a new energy system characterized by a multi layered density a combination of technology organization and physical development

governing the transition to renewable energy a review of impacts and policy issues in the small hydropower boom abstract the transition to renewable energy technologies raises new and important governance questions with small hydropower shp expanding as part of renewable energy and climate mitigation strategies this review assesses its impacts and identifies escalating policy issues to provide a comprehensive literature review of small hydropower we evaluated over 3600 articles and policy documents this review identified four major concerns 1 confusion in small hydropower definitions is convoluting scholarship and policy making 2 there is a lack of knowledge and acknowledgement of small hydropower s social environmental and cumulative impacts 3 small hydropower s promotion as a climate mitigation strategy can negatively affect local communities posing contradictions for climate change policy and 4 institutional analysis is needed to facilitate renewable energy integration with existing environmental laws to ensure sustainable energy development for readers interested in small hydropower we clarify areas of confusion in definition and explain the corresponding impacts for distinct system designs for a broader readership we situate small hydropower implementation within international trends of renewable energy development the contradictory impacts of climate change policy emerging dynamics in energy finance and reliance on market mechanisms our paper provides a timely contribution to scholarship on small hydropower and the transition to renewable energy

spatial price discrimination with heterogeneous products product heterogeneity is introduced into the context of spatial price discrimination many of the strong properties of the standard homogeneous goods case which are attained as a limit case here are shown to be no longer valid in particular the social optimum is no longer sustainable as a market equilibrium unless products are either identical or else very different

profitability of product bundling using copulas to model the stochastic dependence of values this article establishes new general conditions for the profitability of product bundling a multiproduct monopolist generally achieves higher profit from mixed bundling than from separate selling if consumer values for two of its products are negatively dependent are independent or have sufficiently limited positive dependence the profitability of monopoly bundling also extends to situations where a multiproduct firm competes with a single product rival

monopolistic competition price discrimination and welfare abstract this paper studies third degree price discrimination in a monopolistically competitive market when the number of firms is fixed price discrimination raises firm profit and reduces consumer welfare relative to uniform pricing when entry is endogenized the equilibrium product variety under price discrimination is always excessive compared with the social optimum whereas under uniform pricing variety may be too much or too little except when entry is far below the welfare optimum under uniform pricing a ban on price discrimination leads to enhanced consumer and social welfare

the landscape of energy initiatives in sub saharan africa going for systemic change or reinforcing the status quo abstract this article examines recent interventions by major players in sub saharan africa s energy sector and asks whether they acknowledge or seek to address energy as a complex problem and energy systems as socio technical systems several scholars have begun advocating the socio technical approach to energy by noting that the mainstream conceptualization of energy challenges in strictly technological or economic terms does not capture the complexity and inertia inherent to energy systems moreover the article also seeks to examine how well have recent interventions integrated pro poor and low carbon concerns two of the major tenets of un s sustainable development goal 7 findings suggest that initiatives studied take only partial consideration of key aspects of a socio technical approach to the energy problem nonetheless the initiatives have taken on board pro poor and low carbon concerns to a certain extent two main policy implications are drawn from this study a continued focus on status quo approaches has the potential to generate investment inefficiencies and an effective low carbon transition will require a broader discussions about the types of lifestyles people in sub saharan africa aspire to

do immigrant outflows lead to native inflows an empirical analysis of the migratory responses to us state immigration legislation i estimate the impact on internal migration for 52 different demographic groups of the recent influx of state omnibus immigration laws targeting undocumented immigrants in the united states i find evidence that while the demographic groups pinpointed as having higher percentages of undocumented immigrants certainly experience population and employment outflows from states implementing these immigration laws there is a lack of associated inflows for those demographic groups identified by economic theory as being probable substitutes for undocumented immigrants several segments designated as probable substitutes actually experience an adverse effect on population and employment this finding provides rigorous empirical backing to existing anecdotal evidence of the same cross state migratory phenomenon resulting in clear policy implications in relation to the ongoing debate over immigration

walking away from a low carbon economy recent and historical trends using a regional decomposition analysis using the latest available data this brief article attempts to provide the first regional decomposition analysis of co2 emissions from fuel combustion covering eight regions of the world determinants are estimated in relative and absolute terms for the period 1971 2010 we take the 2010 global surge in co2 emissions as an entry point for the analysis overall results show that most regions have recently performed worse than their historical trends and lack of meaningful progress is identified whereas specific drivers for certain regions suggest some level of continuous improvement e g reduced energy intensity in asia they are incapable of offsetting the effects of economic growth and energy use with the exception of africa most regions appear to have missed the low carbon economy opportunity provided by the 2008 2009 global financial crisis results suggest a lack of serious environmental effectiveness of regional policy portfolios aiming at reducing co2 emissions highly ambitious energy efficiency and renewable energy policies across all regions are immediately needed additionally absolute reductions in co2 emissions and energy use from fossil fuels are urgently required in rich regions if we are to align production and consumption patterns with maintaining global warming below the 2 c threshold

governance and legitimacy aspects of the uk biofuel carbon and sustainability reporting system biofuel policy has become highly contentious in europe in this paper we discuss the governance and legitimacy aspects of the carbon and sustainability system of the uk renewable transport fuel obligation rtfo both before and after implementation of the renewable energy directive rtfo certification is of a meta type being built upon existing certification and labelling schemes each of which are more or less contested by ngos despite the rtfo being based on these non state initiatives so far the concerns of environment and development ngos and others have not been given serious expression in regulatory terms indeed biofuel policy development in the uk has arguably been unduly non responsive to critical opinion given the limited scientific base on biofuel impacts and the reliance of rtfo sustainability certification on non state actors and schemes drawing on documentary evidence interviews and three sets of literatures co production of regulation post normal science and legitimacy of non state certification and labelling processes we suggest that until concerned voices are given a stronger expression in uk and ec biofuel policy development the policy cannot yet be said to have achieved a wide social mandate

the effects of third degree price discrimination in oligopoly retail firms and restaurants commonly offer senior citizen discounts i suspect this practice is not motivated by altruism rather the behavior can be better explained as profit maximizing price discrimination these firms are setting a low price in a market which probably has high elasticity of demand but why should the demand of senior citizens be more elastic than average one possibility is that elderly people have below average income and they would not eat out if restaurant prices were high perhaps a more plausible explanation is that retired people simply have more time on their hands to spend commuting across town to take advantage of discounts the purpose of these discounts may then be to lure senior citizens away from other restaurants rather than to get them out of the house the analysis of third degree price discrimination has a long history a c pigou 1920 joan robinson 1933 and two articles on the subject have recently appeared in this review richard schmalensee 1981 hal varian 1985 the industry structure in these analyses is monopoly but an explicit model of some form of competition is obviously needed to study discriminatory discounts meant to attract customers from rival firms and even discounts meant to get people out of the house may have an oligopoly analysis which is qualitatively different from their monopoly anlysis in this paper i present a simple duopoly model of a differentiated products industry i show that a firm s price elasticity of demand in a market can be expressed as the sum of two parts the industry demand elasticity and the cross price elasticity the first measures the tendency of consumers in a market to stay home when the price goes up the second the tendency to switch suppliers in the monopoly case in which the crossprice elasticity is zero and the collusive case in which the cross price elasticity is irrelevant discrimination between markets is due to differences in industry demand elasticity in the noncooperative oligopoly case equilibrium price differentials can be accounted for both by differences in cross price elasticity as well as differences in industry demand elasticity total industry output when the firms can discriminate between two markets is compared to what it would be if discrimination were impossible which regime has larger output depends on the sum of the adjustedconcavity condition and the elasticity ratio condition the first predominates when the rival products are poor substitutes and the firms have approximate monopoly power while the second predominates at the other extreme where the products are close substitutes and the firms have almost no market power the adjusted concavity condition compares the relative curvature of demands in the two markets and was originally discovered by robinson 1933 in her analysis of monopoly price discrimination the elasticity ratio condition compares the relative difference in industry demand elasticity between the two markets with the relative difference in cross price elasticity according to the elasticity ratio condition a discriminatory discount due to high industry elasticity of demand would be more likely to increase total output than one due to high cross price elasticity the effect of discrimination on profit is also discussed the distinction made here department of economics university of wisconsin madison madison wi 53706 this paper is a revision of part of my doctoral dissertation i am grateful to steve matthews ken judd and john panzar for guidance in this research i also thank seminar participants at wisconsin the justice department and the 1986 econometric society meetings in new orleans and the discussant martin perry the excellent comments of the referees improved the exposition of the paper

co provision in sustainable energy systems the case of micro generation electricity generation by individual households known as micro generation is attracting an increasing amount of interest within government industry and the research community this paper focuses on the potential for micro generation to contribute to a more active role for household energy consumers in the development and operation of the energy system the paper applies the concept of energy service co provision to aid an understanding of this more active role it considers a number of alternative models for micro generation investment that imply different kinds of co provision by consumers and energy companies the analysis focuses in particular on the economics of these models in the uk the associated barriers to micro generation investment and the scope for overcoming these barriers through changes in fiscal rules having conducted this economic analysis the paper concludes with a brief discussion of the wider implications of these models for consumer behaviour in particular it considers the impact of it and control systems that might be employed to facilitate energy service co provision that includes micro generation

should mobile marketers collect data other than geo location we take today s mobile marketing data landscape as a starting point and consider a duopoly model of third degree price discrimination in which firms can complement geo location information with data on consumer flexibility of varying quality we show that depending on consumer heterogeneity higher quality flexibility data affect profits according to three different patterns in equilibrium both firms tend to acquire data if the data are of high quality while only one acquires data if the data quality is low firms are likely to gain from additional data if consumers have similar preferences and or when data are precise although social welfare weakly improves consumers can be harmed

product line rivalry with brand differentiation competition with product rivalry is examined in a model where products are differentiated by both quality and brand name with no commitment firms produce a full product line when firms can commit to restrict their product offerings firms specialize if the degree of brand specific differentiation is small and they produce a full product line if brand specific differentiation is large relative to intrafirm differentiation firms may crowd a product space when all competitors would be better off with specialization brand proliferation is a credible entry deterring strategy if the degree of brand specific differentiation is not too large copyright 1993 by blackwell publishing ltd

aggregation and imperfect competition on the existence of equilibrium we present a new approach to the theory of imperfect competition and apply it to study price competition among differentiated products the central result provides general conditions under which there exists a pure strategy price equilibrium for any number of firms producing any set of products this includes products with multi dimen sional attributes in addition to the proof of existence we provide conditions for uniqueness our analysis covers location models the characteristics approach and probabilistic choice together in a unified framework to prove existence we employ aggregation theorems due to prekopa 1971 and borell 1975 our companion paper caplin and nalebuff 1991 introduces these theorems and develops the application to super majority voting rules we present a new approach to the theory of imperfect competition and apply it to study price competition among differentiated products the central result is that there exists a pure strategy price equilibrium for any number of firms producing any set of products in addition to the proof of existence we provide conditions for uniqueness our model both unites diverse strands of the earlier literature and opens up uncharted areas for future analysis in particular we expand the traditional one dimensional framework to allow for multi dimen sional product differentiation our approach involves twin restrictions on consumer preferences one on individuals preferences the other on the distribution of preferences across society these are generalizations of the restrictions supporting 64 majority rule presented in caplin and nalebuff 1988 to prove existence we apply a new technique of aggregation this technique is valuable in a variety of other problems in the companion paper we use the aggregation result to generalize our earlier work on 64 majority rule and to characterize the relationship between the distribution of human capital and the distribution of income caplin and nalebuff 1991 there are additional applications in statistics and in search theory we begin with a brief review of the early literature on imperfect competition describing in more detail the existence problem and previous solutions section 3 presents our twin assumptions and shows that they cover many standard cases in section 4 we introduce the aggregation theorem and use it in the analysis of demand functions the proof of existence of equilibrium is in section

is immigration enforcement shaping immigrant marriage patterns abstract this paper identifies intermarriage between non citizens and citizens as an important response mechanism to intensified immigration enforcement particularly among mexican non citizens exploiting the temporal and geographic variation in the implementation of interior immigration enforcement from 2005 to 2017 we find that a one standard deviation increase in enforcement raises mexican non citizens likelihood of marrying a u s citizen by 3 to 7 both police based and employment based enforcement contribute to this impact the analysis adds to a growing literature examining how immigrants respond to tightened enforcement and importantly sheds light on the recent growth of intermarriage among mexican immigrants

on the strategic choice of spatial price policy the strategic incentives with respect to the choice of price policy in spatial competition are analyzed in a duopoly model price discrimination emerges as the unique equilibriu m outcome in games with either simultaneous choice of policy and pric e or sequential choice where firms may commit first to uniform mill p ricing before the actual market stage nevertheless profits may be h igher with uniform pricing the authors models are applied to analyz e some common business practices that arise in geographical pricing like the basing point system and in the pricing of varieties or opti ons from a base product in a product differentiation context copyright 1988 by american economic association

immigration and inequality immigration is often viewed as a proximate cause of the rising wage gap between highand low skilled workers nevertheless there is controversy over the appropriate theoretical and empirical framework for measuring the presumed effect and over the precise magnitudes involved this paper offers an overview and synthesis of existing knowledge on the relationship between immigration and inequality focusing on evidence from cross city comparisons in the u s while some researchers have claimed that a cross city research design is inherently flawed i argue that the evidence from cross city comparisons is remarkably consistent with recent findings based on aggregate time series data in particular cross city and aggregate time series comparisons provide support for three key conclusions 1 workers with below high school education are perfect substitutes for those with a high school education 2 high school equivalent and college equivalent workers are imperfect substitutes with an elasticity of substitution on the order of 2 3 within education groups immigrants and natives are imperfect substitutes together these results imply that the average impacts of recent immigrant inflows on the relative wages of u s natives are small the effects on overall wage inequality including natives and immigrants are larger reflecting the concentration of immigrants in the tails of the skill distribution and higher residual inequality among immigrants than natives even so immigration accounts for a small share 5 of the increase in u s wage inequality between 1980 and 2000

multi dimensional price discrimination we examine the profitability and welfare implications of price discrimination in a multi dimensional model first when firms price discriminate on one and the same dimension uniform price lies in between discriminatory prices and price discrimination raises profits relative to uniform pricing this is in contrast to common findings in existing one dimensional models featuring best response asymmetry suggesting that price discrimination can have qualitatively different implications in one and multi dimensional models second price discrimination on one and the same dimension is the likely outcome when price discrimination decisions are endogenized using a two stage discrimination then pricing game correspondingly an observation of one dimensional price discrimination in practice does not necessarily indicate that the underlying model should be one dimensional