optimal electricity market for wind power abstract this paper is about electricity market operation when looking from the wind power producers point of view the focus in on market time horizons how many hours there is between the closing and delivering the bids the case is for the nordic countries the nordpool electricity market and the danish wind power production real data from year 2001 was used to study the benefits of a more flexible market to wind power producer as a result of reduced regulating market costs from better hourly predictions to the market wind power producer would gain up to 8 more if the time between market bids and delivery was shortened from the day ahead elspot market hourly bids by noon for 12 36 h ahead an after sales market where surplus or deficit production could be traded 2 h before delivery could benefit the producer almost as much gaining 7

territorial innovation models a critical survey moulaert f and sekia f 2003 territorial innovation models a critical survey reg studies 37 289 302 this paper provides a critical review of the literature on territorial innovation models industrial districts milieux innovateurs new industrial spaces local production systems etc the review is organized in two stages first the main features of each of these models and their view of innovation are compared second their theoretical building blocks are reconstructed and evaluated from the point of view of conceptual clarity and analytical coherence it is found that despite some semantic unity among the concepts used economies of agglomeration endogenous development systems of innovation evolution and learning network organization and governance territorial innovation models tims suffer from conceptual ambiguity the latter is mainly a consequence of the way territorial innovation is theorized i e in terms of technologically driven innovation and a business culture that is ma

collateral effects of liberalisation metering losses load profiles and cost settlement in spain s electricity system european energy markets have undergone a major transformation as they have advanced towards market liberalisation and it is vital that the details of these developments be carefully examined the success of liberalisation is based on smart regulation which has been capable of providing solutions to unforeseen events in the process our paper seeks to contribute to existing understanding of the unexpected and collateral effects of the liberalisation process in the power system by examining a natural experiment that occurred in spain in 2009 in that year the electricity supply by distribution system operators disappeared this change in retail market competition as we demonstrate in this paper has had an unexpected effect in terms of the system s balancing requirements we undertake a rigorous assessment of the economic consequences of this policy change for the whole system in terms of its impact on final electricity prices

trading wind generation in short term energy markets even with state of the art forecasting methods the short term generation of wind farms cannot be predicted with a high degree of accuracy in a market situation these forecasting errors lead to commercial risk through imbalance costs when advance contracting this situation is one that needs to be addressed due to the steady increase in the amount of grid connected wind generation combined with the rise of deregulated market orientated electricity systems in the presence of imbalance prices and uncertain generation a method is required to determine the optimum level of contract energy to be sold on the advance markets such a method is presented here using markov probabilities for a wind farm and demonstrates substantial reductions in the imbalance costs the effect of market closure delays and forecasting window lengths are also shown

state aid formulas and the local incentive to chase or shun ratables most programmes of state aid to local governments in the us are designed to fix problems of interjurisdictional or interpersonal equity not to address the effect that local tax reliance might have

high penetration wind generation impacts on spot prices in the australian national electricity market this paper explores wind power integration issues for the south australian sa region of the australian national electricity market nem by assessing the interaction of regional wind generation electricity demand and spot prices over 2 recent years of market operation sa s wind energy penetration has recently surpassed 20 and it has only a limited interconnection with other regions of the nem as such it represents an interesting example of high wind penetration in a gross wholesale pool market electricity industry our findings suggest that while electricity demand continues to have the greatest influence on spot prices in sa wind generation levels have become a significant secondary influence and there is an inverse relationship between wind generation and price no clear relationship between wind generation and demand has been identified although some periods of extremely high demand may coincide with lower wind generation periods of high wind output are associated with generally lower market prices and also appear to contribute to extreme negative price events the results highlight the importance of electricity market and renewable policy design in facilitating economically efficient high wind penetrations

the social efficiency of instruments of promotion of renewable energies a transaction cost perspective this paper compares the social efficiency of the regulatory instruments used to promote renewable energy sources in electricity generation taking into consideration their role in promoting the preservation of collective goods they are based on a purchase obligation and act either by price feed in tariffs or by quantity bidding for new res e capacities res e quotas from the public economics perspective the two instruments are distinct in terms of cost efficacy and market incentives in a world of imperfect information exchangeable quotas of green certificates are preferred because this instrument allows better control over consumer costs and whilst retaining market incentives transaction cost economics tce contributes to the assessment of these instruments by introducing res e investment safeguard as a major determinant of social efficiency and the instruments conformity to its institutional environment as a determinant of its viability in light of this additional consideration the arrangements between res e producers and obligated buyers inherent in each instrument are in fact quite similar either long term contracting or vertical integration we compare and assess res e price and quantity instruments on several dimensions from both the public economics and tce perspectives control of the cost for consumers safeguards of res e investments adaptability of the instrument in order to preserve its stability in the long run market incentive intensity and conformity with the new market regime of electricity industry it shows neither instruments offer an optimal solution in each of these dimensions the government will thus select an instrument in accordance with the relative importance of its objectives c 2006 elsevier b v all rights reserved

urban resurgence and the consumer city cities make it easier for humans to interact and one of the main advantages of dense urban areas is that they facilitate social interactions this paper provides evidence for the us suggesting th

beyond economic base theory the role of the residential economy in attracting income to swiss regions segessemann a and crevoisier o beyond economic base theory the role of the residential economy in attracting income to swiss regions regional studies regional development theories are mainly focused on export based activities to explain regional competitiveness the increasing mobility of workers and residents leads to a reconsideration of this approach residential economy has become a strategic issue to generate incomes within regions with this view the paper analyses the link between economic activities and incomes from workers and annuitants residents a spatial typology breakdown is compiled for swiss regions using a hierarchical cluster analysis hca empirical results highlight various regional development profiles conversely to export based theories regions with higher income are those with strong residential economy thus opening new avenues for local governance

an evaluation of intraday trading and demand response for a predominantly hydro wind system under nordic market rules many countries are planning for a large scale expansion of wind power this development will have a significant impact on power system operation and economics one of the challenges is that the dif

the contribution of renewable resources in meeting turkey s energy related challenges abstract the aim of this paper is to point out the importance of renewable energy as a key way for resolving the turkey s energy related challenges as a consequence of economic and social development turkey s energy consumption has risen dramatically over the past three decades at present fossil fuels account for more than 90 of the total energy consumption in the country turkey has no large oil and natural gas reserves and it import nearly all of these fossil fuels turkey s current energy mix is not likely to support development of sustainable energy the energy mix shows a relatively small contribution from renewable energy sources in the country they have the potential to make a large contribution to turkey s sustainable and independent energy future in particular they can help to reach the environmental goals of turkey and to increase the security of energy supply by reducing the dependence on imported fuel supplies

analysing the distribution of population based employment in france dissart j c aubert f and lepicier d analysing the distribution of population based employment in france regional studies the objective of this paper is to analyse the spatial distribution of employment in population based services across metropolitan france the population based economy comprises services that satisfy the demand of both the permanent residing and temporary tourists and day travellers population using spatial regression and shift share analysis at the functional economic area scale several categories of location factors are studied market potential the propensity to consume locally as well as local attractiveness and access to facilities results identify structural and geographic factors related to local demand and show that the distribution of employment follows an urban rural gradient except in peri urban and tourism areas dissart j c aubert f and lepicier d

value of price responsive load for wind integration in unit commitment the ability of load to respond to short term variations in electricity prices plays an increasingly important role in balancing short term supply and demand especially during peak periods and in dealing with fluctuations in renewable energy supplies however price responsive load has not been included in standard models for defining the optimal scheduling of generation units in short term here elasticities are included to adjust the demand profile in response to price changes including cross price elasticities that account for load shifts among hours the resulting peak reductions and valley fill alter the optimal unit commitment enhancing demand response also increases the amount of wind power that can be economically injected further wind power uncertainty can be managed at a lower cost by adjusting electricity consumption in case of wind forecast errors which is another way in which demand response facilitates the integration of intermittent renewables

economic assessment of the participation of wind generation in the secondary regulation market the aim of this paper is to analyze the profitability of wind technology as a potential participant in the frequency regulation specifically in the secondary regulation market the study is conducted for the spanish system using existing market rules however although this system has some peculiarities the main methodology could be applied in other systems firstly a bibliographical review of the relevant technical possibilities of this technology is carried out then a simulation study based on real data is conducted in order to evaluate the maximum possible incomes later a specific offer strategy is proposed and the income is estimated based on statistical modeling and checked by simulating its performance using the actual and forecasted productions of a wind portfolio it is concluded that under the current generation structure and regulatory framework in the spanish system the incomes obtained from the participation of wind technology would be modest however secondary regulation by wind generators might facilitate higher penetration levels of this technology in the long term with expected wind generation subsidies much reduced a greater need for regulation reserves and a possible increase in regulation prices regulation related incomes might become a sizeable fraction of the total income of wind generators

the distinctive city divergent patterns in growth hierarchy and specialisation with accelerated world market integration cities compete with each other cities as sites of production and consumption targeting firms and households as semi autonomous location decision makers distinction may be sought in productive structure consumption and identity in this paper contradictory trends towards homogenisation and distinctiveness are theorised studying the occupational structure of 50 large us metropolitan areas it is found that distinctiveness has been increasing in economic base occupations though some heavily blue collar cities edge is eroding employment in consumption activities has been growing faster than in the economic base and cities are becoming more alike in consumption structure it is concluded that the search for niches in exporting sectors and related occupational mix is key to urban resurgence

balancing power and variable renewables three links abstract balancing power is used to quickly restore the supply demand balance in power systems the need for this tends to be increased by the use of variable renewable energy sources vre such as wind and solar power this paper reviews three channels through which vre and balancing systems interact the impact of vre forecast errors on balancing reserve requirements the supply of balancing services by vre generators and the incentives to improve forecasting provided by imbalance charges the paper reviews the literature provides stylized facts from german market data and suggests policy options surprisingly while german wind and solar capacity has tripled since 2008 balancing reserves have been reduced by 15 and costs by 50

residential amenities firm location and economic development amenities are regarded as increasingly important to the location decisions of certain types of firm yet they are often ignored in economic development research because of the assumption that they attract only workers and that this workforce in turn attracts firms this paper argues for a reduced form model of the impact of amenities on corporate location when testing such a model at the intra metropolitan scale it will be necessary to measure amenities not only at the potential worksite but also where employees are likely to live this paper tests such a firm location model using a sample of municipalities in northern new jersey results support the hypothesis that firms evaluate certain amenities with respect to the likely residential locations of their employees

the donald robertson memorial prizewinner 2003 the nature of the neighbourhood this paper considers the order that emerges in cities as individuals exchange and pool rights over resources in pursuit of individual and mutual gain in his 1937 article the nature of the firm ronald coase explained the existence and size of firms in terms of transaction costs neighbourhoods are important units of consumption and production and can like firms be explained by transaction costs a theory of the neighbourhood is developed based on transaction costs property rights and related ideas from the new institutional economics a neighbourhood is defined as a nexus of contracts and four rules that govern neighbourhood evolution are specified normative aspects of the theory are illustrated by examining the organisational order in neighbourhoods in particular the pattern of residual claimants in the contracts that underpin neighbourhood dynamics

opportunity cost bidding by wind generators in forward markets analytical results wind generation must trade in forward electricity markets based on imperfect forecasts of its output and real time prices when the real time price differs for generators that are short and long the optimal forward strategy must be based on the opportunity costs of charges and payments in real time rather than a central estimate of wind output we present analytical results for wind s optimal forward strategy in the risk neutral case the optimal strategy is determined by the distribution of real time available wind capacity and the expected real time prices conditioned on the forward price and wind out turn our approach is simpler and more computationally efficient than formulations requiring specification of full joint distributions or a large set of scenarios informative closed form examples are derived for particular specifications of the wind price dependence structure in the usual case of uncertain forward prices the optimal bidding strategy generally consists of a bid curve for wind power rather than a fixed quantity bid a discussion of the risk averse problem is also provided an analytical result is available for aversion to production volume risk however we doubt whether wind owners should be risk averse with respect to the income from a single settlement period given the large number of such periods in a year

beyond tourism based economic development city regions and transient custom abstractmany localities are able to survive without competitive export industries the economic base of regional development rests upon various wage and non wage external incomes however suitable regional data are often unavailable and particularly those related to external consumer spending in urban regions and short stay tourism three geo localized databases are here combined into a circular flow template from former consumer spending to the final wage income by doing so the paper contributes to identifying transient custom as a new inflow driving local development and it provides a first estimate of its magnitude using the paris region as a case study

microeconomic adjustment hazards and aggregate dynamics the basic premise of this paper is that understanding aggregate dynamics requires considering that agents are heterogeneous and that they do not adjust continuously to the shocks they perceive we provide a general characterization of lumpy behavior at the microeconomic level in terms of an adjustment hazard function which relates the probability that a unit adjusts to the deviation of its state variable from its moving target we characterize rich cross sectionally dependent aggregate dynamics generated by nonconstant hazards we present an example based on u s manufacturing employment and job flows and find that increasinghazard models outperform constant hazard partial adjustment models in describing aggregate employment dynamics

analysis of the imbalance price scheme in the spanish electricity market a wind power test case this work investigates the interaction between wind power and electricity markets the paper is focused on balancing markets pricing policies the proposal of a new imbalance price scheme is included and conveniently evaluated this proposed scheme tries to minimise the use of ancillary services to compensate for deviations in searching for a more efficient market design the effectiveness of imbalance prices as market signals is also examined and policy recommendations regarding imbalance services are discussed two test cases are included that analyse the participation of a wind power producer in the spanish electricity market using a stochastic optimisation strategy for this purpose the uncertainty of the variables is considered i e wind power production and prediction intraday and imbalance prices test cases were run with real data for 10 months and realistic results are presented along with a hypothetical test case the regulation of the imbalance prices may not be adequate for the spanish electricity market because an error drop is not sufficiently encouraged therefore we suggest the application of a new imbalance price scheme which includes an additional constraint the conclusions of this paper can be assumed to be general policy recommendations

distribution of costs induced by the integration of res e power this article focuses on the distribution of costs induced by the integration of electricity generation from renewable energy sources res e the treatment to distribute these costs on different market actors is crucial for its development for this purpose individual actors of electricity markets and several cost categories are identified according to the defined cost structure possible treatments to distribute the individual cost categories on different relevant actors are described finally an evaluation of the cost distribution treatments based on an economic analysis is given economic efficiency recommends that clearly attributable shallow grid connection as well as deep grid costs are charged to the corresponding res e producer and that the res e producers are also charged the regulating power costs however deep grid integration costs should be updated to reflect evolving scarcities also regulating power costs should reflect actual scarcity and thus be symmetric and based on real time prices taking into account the overall system imbalance moreover the time span between the closure of the spot market and actual delivery should be chosen as short as possible to enable accurate res e production forecasts