turnover in an accounting firm we use a unique data set to investigate whether a matching model can describe turnover in an accounting firm the main focus of the article is to determine whether the probability of separation from employment varies in the way described by jovanovic the evidence suggests that as tenure increases both terminations and quits follow the predicted pattern

sense and no n sense of energy security indicators energy security ranks high on the policy agenda of many countries to improve on energy security governments undertake regulatory measures for promoting renewable energy increasing energy efficiency or curbing carbon dioxide emissions the impacts of such measures on energy security are typically monitored by means of so called energy security indicators in this paper we show that the common use of wide spread energy security indicators falls short of providing a meaningful metric regulatory measures to improve on energy security trigger ambiguous effects across energy security indicators we conclude that a major pitfall of energy security indicators is the lack of a rigorous microeconomic foundation

who governs energy the challenges facing global energy governance this article conceptualizes the energy problems facing society from a global governance perspective it argues that a notion of global energy governance taken to mean international collective action efforts undertaken to manage and distribute energy resources and provide energy services offers a meaningful and useful framework for assessing energy related challenges the article begins by exploring the concepts of governance global governance and global energy governance it then examines some of the existing institutions in place to establish and carry out rules and norms governing global energy problems and describes the range of institutional design options available to policymakers it briefly traces the role of a selection of these institutions from inter governmental organizations to summit processes to multilateral development banks to global action networks in responding to energy issues and points out their strengths and weaknesses the article concludes by analyzing how the various approaches to global governance differ in their applicability to addressing the conundrums of global energy problems

measuring the energy security implications of fossil fuel resource concentration abstract economic assessments of the welfare effects of energy insecurity are typically uncertain and fail to provide clear guidance to policy makers as a result governments have had little analytical support to complement expert judgment in the assessment of energy security this is likely to be inadequate when considering multiple policy goals and in particular the intersections between energy security and climate change mitigation policies this paper presents an alternative approach which focuses on gauging the causes of energy insecurity as a way to assist policy making the paper focuses on the energy security implications of fossil fuel resource concentration and distinguishes between the price and physical availability components of energy insecurity it defines two separate indexes the energy security price index espi based on the measure of market concentration in competitive fossil fuel markets and the energy security physical availability index espai based on the measure of supply flexibility in regulated markets the paper illustrates the application of espi and espai with two case studies france and the united kingdom looking at the evolution of both indexes to 2030

two sided uncertainty and up or out contracts a bilateral moral hazard problem provides a rationale for up or out employment contracts the employer sets a wage higher than opportunity cost to induce the worker to invest in firm specific capital if the individual does not make the grade it is in the firm s interest ex post to fire him had the initial arrangement not included provisions for firing individuals the firm would underreport the value of the employee wrecking the incentive scheme the basic model permits both firm and worker to be risk neutral therefore it admits a straightforward multiperiod extension which we also investigate

oil vulnerability index of oil importing countries abstract this paper assesses the relative oil vulnerability of 26 net oil importing countries for the year 2004 on the basis of various indicators the ratio of value of oil imports to gross domestic product gdp oil consumption per unit of gdp gdp per capita and oil share in total energy supply ratio of domestic reserves to oil consumption exposure to geopolitical oil market concentration risks as measured by net oil import dependence diversification of supply sources political risk in oil supplying countries and market liquidity the approach using the principal component technique has been adopted to combine these individual indicators into a composite index of oil vulnerability such an index captures the relative sensitivity of various economies towards developments of the international oil market with a higher index indicating higher vulnerability the results show that there are considerable differences in the values of individual indicators of oil vulnerability and overall oil vulnerability index among the countries both inter and intraregional

the economics of rising stars this paper analyzes an occupation in which there is substantial uncertainty about individual performance and past performance is correlated with future outcomes in equilibrium only the young enter the occupation and only the successful stay on the young are numerous and earn incomes well below what their current alternative o ffers success is rare and rewarded highly the implied distribution of earnings must have positive skewness copyright 1988 by american economic association

evaluating energy security in the asia pacific towards a more comprehensive approach the energy security conundrum how to equitably provide available affordable reliable efficient and environmentally benign energy services is a technology and policy challenge perhaps unlike any other the recent article on an energy security in the asia pacific by vlado vivoda is an excellent starting point for how to best capture the unique energy security challenges facing the region this article builds on vivoda s work but also points out some shortcomings with his analysis

firm specific human capital job matching and turnover evidence from major league baseball 1900 1992 the two dominant labor market turnover hypotheses the firm specific human capital model fshcm and the job matching model suggest different patterns of player mobility in major league baseball the matching hypothesis predicts greater mobility of players in positions that require substantial team production a better match may offer large productivity gains alternately the fshcm predicts players in positions requiring the greatest amount of teamwork will benefit from specific knowledge making them less likely to change teams we examine the frequency distribution of trades by player position from 1900 1992 and find the fshcm provides the best explanation for turnover in this industry

how the market solves an assignment problem the matching of lawyers with legal claims in the market for lawyers observable data on promotion and turnover can be explained by reference to the idea that there is positive assortative mating of lawyers and legal claims there is a scale of resources effect under which it is optimal to assign larger claims to lawyers of higher quality in a law firm the institution of tenure performs a sorting function lawyers found to be of high quality are given tenured positions and the rest leave the value of legal claims handled by a firm determines its sorting problem which in turn determines its promotion ladder and turnover

defining energy security takes more than asking around abstract in undetermined the recent contribution by benjamin sovacool proposes 20 dimensions and 320 indicators of energy security in asia however the method for identifying these dimensions and indicators 64 semi structured interviews has three shortcomings first asian policy makers responsible for energy security are absent from the pool of respondents dominated by academics second no prioritization or contextualization of energy security concerns is attempted leading to an excessively long generic list third no disagreements between the interviewed experts are accounted for future attempts to define energy security based on perceptions should involve relevant social actors include mechanisms for discriminating between primary and secondary concerns and find ways to constructively report on disagreements less

intertemporal market effect on gender earnings differentials lawyers in canada 1970 80 the conventional methodology for decomposition of cross sectional earnings differentials is extended to include a market effect on intertemporal changes in earnings and to analyse the changes in gender differentials over time the integrated cross sectional and intertemporal methodology is illustrated by a decomposition of the change in the earnings differential that occurred during the 1970s between male and female lawyers in canada an unprecedented rate of growth in the supply of lawyers during the 1970s in canada was associated with changes in the gender earnings differential in the legal profession this rapid supply growth had an almost negligible net impact on female earnings but a negative impact of 15 on the male earnings this explains the narrowing of the earnings differential by almost 30 over the decade although three fifths of the gender differential in 1970 and half of the differential in 1980 were attributable to the differences in the characteristics of the two groups these chang

estimation of the internal adjustment costs model using longitudinal establishment data this paper develops estimates of the internal costs measured in terms of foregone current output associated with the introduction of new plant and equipment into manufacturing establishments using the census bureau s longitudinal establishment data file a very large and rich source of production and investment data our estimates provide strong support for the internal adjustment costs hypothesis they indicate that one dollar increases in expansion and replacement investment cause on the average 35and 21 cent reductions respectively in current output the internal cost of adjusting to equipment appears to be higher than the cost of adjusting to plant

evaluating energy security in the asia pacific region a novel methodological approach this paper establishes an energy security assessment instrument based on a new and expanded conceptualisation of energy security the instrument is a systematic interrogative tool for evaluating energy security of individual states or regions it consists of eleven broad energy security dimensions associated with the current global energy system these energy security dimensions take into account numerous quantitative and qualitative attributes of each country s energy security and policy and include both traditional energy security concerns and many new factors such as environmental socio cultural and technological another dimension largely absent from previous analyses is the existence of and the issues addressed in energy security policy in each country this instrument serves as an assessment system with which to evaluate energy security in the asia pacific region the existing studies on energy security in the asia pacific region suffer from serious limitations no study to date examines regional energy security policies by adopting a more comprehensive energy security definition as a starting point most studies also focus on a single country or issue even if they examine energy security in major regional economies they lack critical comparative analysis the instrument is valuable as it may be utilised to draw a comprehensive map of regional energy security situation which can also include comparative analysis of energy security characteristics across the asia pacific region ultimately it may be utilised to set up a framework for improved regional energy cooperation with the aim of providing regional leaders with a blueprint for improving regional energy security and policy

up or out contracts a signaling perspective a firm will typically gather information concerning its own workers that is not available to other potential employers while other firms will attempt to reduce this information asymmetry by observing the actions of the initial employer i argue that this process can be important in environments characterized by up or out contracts in that the retention decision can serve as a signal of productivity the article investigates this argument in an environment where up or out contracts are employed because they provide workers with an incentive to accumulate general human capital and where learning takes place in a diffuse fashion

a cautious price adjustment mechanism chaotic behavior abstract it is well known that adjustment processes like tatonnement can show erratic dynamic behavior the prices can make big jumps and vary over a wide range a discrete tatonnement process in a simple two goods economy is studied with only one price adjusted it is shown that the interval in which the price varies can be restricted to a neighborhood of an equilibrium price with big jumps excluded if the relative price adjustment is restricted by a maximal rate of increase or decrease of the price within the interval any type of erratic dynamics remains possible

assessing the energy vulnerability case of industrialised countries the emergence of new big consumer countries on the energy markets and the perspective of oil and gas depletion at the end of the current century raise the concerns about fair distribution of the remaining resources for the common and sustainable wellbeing of the mankind high volatility of energy prices discourages the investment and delays the energy technology transition voluntary measures are needed mainly in industrialised countries in order to develop alternative and sustainable energy sources to enable technology transfer towards emerging and developing countries and to avoid struggle for energy procurement in this paper a composite index of energy demand supply weaknesses is defined as a proxy of energy vulnerability the proposed index is based on several indicators such as energy intensity oil and gas import dependency co2 content of primary energy supply electricity supply weaknesses and non diversity in transport fuels the assessment of this composite index for selected industrialised countries is discussed as well as the sensitivity to various factors

job matching and the wage distribution this paper brings together the microeconomic labor and the macroeconomic equilibrium views of matching in labor markets we nest a job matching model a la jovanovic 1984 into a mortensen and pissarides 1994 type equilibrium search environment the resulting framework preserves the implications of job matching theory for worker turnover and wage dynamics and it also allows for aggregation and general equilibrium analysis we obtain two new equilibrium implications of job matching and search frictions for wage inequality first learning about match quality and worker turnover map gaussian output noise into an ergodic wage distribution of empirically accurate shape unimodal skewed with a paretian right tail second high idiosyncratic productivity risk hinders learning and sorting and reduces wage inequality the equilibrium solutions for the wage distribution and for the aggregate worker flows quits to unemployment and to other jobs displacements hires provide the likelihood function of the model in closed form

energy security and sustainability in northeast asia abstract energy security has typically to those involved in making energy policy meant mostly securing access to oil and other fossil fuels with increasingly global diverse energy markets however and increasingly transnational problems resulting from energy transformation and use old energy security rationales are less salient and other issues including climate change and other environmental economic and international considerations are becoming increasingly important as a consequence a more comprehensive operating definition of energy security is needed along with a workable framework for analysis of which future energy paths or scenarios are likely to yield greater energy security in a broader more comprehensive sense work done as a part of the nautilus institute s pacific asia regional energy security pares project developed a broader definition of energy security and described an analytical framework designed to help to compare the energy security characteristics both positive and negative of different quantitative energy paths as developed using software tools such as the leap long range energy alternatives planning system

photovoltaic power stations in germany and the united states a comparative study by data envelopment analysis abstract this study compares photovoltaic pv power stations between germany and the united states to examine which country more efficiently provides renewable energy in their usages for the comparative analysis this study utilizes data envelopment analysis dea as a methodology to evaluate the performance of pv power stations from the perspective of both solar and land usages a total of one hundred sixty pv power stations eighty in germany and eighty in the united states are used for this comparison the demand for sustainable energy and energy security has been rapidly increasing over the past decade because of concerns about environment and limited resources pv solutions are one of many renewable technologies that are being developed to satisfy a recent demand of electricity germany is the world s top installer and consumer of pv power and the united states is one of the top five nations germany leads the way in installed pv capacity even though the nation has less solar resources and land area due to limited solar resources low insolation and sunshine and land area the united states should have a clear advantage over germany however the empirical result of this study exhibits that pv power stations in germany operate more efficiently than those of the united states even if the latter has many solar and land advantages the surprising result indicates that the united states has room for improvement when it comes to utilizing solar and land resources and needs to reform the solar policy for such a purpose feed in tariff fit may be an effective energy policy at the state level in the united states because the fit provides investors such as utility companies and other types of energy firms with financial incentives to develop large pv power stations and generation facilities for other renewable energy it may be true that the fit is a powerful policy tool to promote pv and other renewable installation and support a reduction of an amount of greenhouse gases however the fit poses a large financial burden to consumers with a massive increase in renewable energy installation like in germany and spain therefore it is necessary for the united states to consider how to align a policy with a speed of technology innovation to balance between the benefit and the cost derived from the policy implementation on renewable energy in addition this study discusses policy issues regarding cost allocation due to fit among stakeholders related to the electric power industry at the end this study proposes a new type of wholesale electricity market that provides simultaneous trading on electricity and greenhouse gas emissions by fully utilizing modern computer science technology that exists in universities and national laboratories of the united states

on the complexities of complex economic dynamics complex economic nonlinear dynamics endogenously do not converge to a point a limit cycle or an explosion their study developed out of earlier studies of cybernetic catastrophic and chaotic systems complexity analysis stresses interactions among dispersed agents without a global controller tangled hierarchies adaptive learning evolution and novelty and out of equilibrium dynamics complexity methods include interacting particle systems self organized criticality and evolutionary game theory to simulate artificial stock markets and other phenomena theoretically bounded rationality replaces rational expectations complexity theory influences empirical methods and restructures policy debates

job matching with finite horizon and risk aversion the consequences of introducing risk averse workers with a known finite retirement age into a simple job matching framework are explored the job matching model includes two jobs in the primary job workers and firms learn about the worker s productivity by observing his output over time in the secondary job productivity of any worker is known with certainty at the outset workers start off in the primary job but based on their observed performance may choose to switch to the secondary job the model is developed in two stages first the finite retirement age is introduced while the usual assumption of risk neutral workers is retained in this model it is shown that all workers who achieve at least a certain cumulative output record denoted r by a certain age denoted t will thereafter remain in the primary job until retirement those who do not achieve r by age t switch to the secondary job at or before age t and remain there second risk aversion is introduced along with finite retireme

a theory of quits and layoffs with efficient turnover this paper answers the efficient turnover literature s long silence regarding the quit layoff distinction treating quits as worker initiated separations and layoffs as firm initiated separations i establish that the existence of layoffs is compatible with optimizing workers and firms forming and dissolving employment matches to exploit all the gains from trade the efficient turnover approach is shown to be consistent with many empirical regularities that distinguish quits from layoffs structural implications of the model are tested on data from the psid

indicators of energy security in industrialised countries energy security has become a popular catch phrase both in the scientific arena as well as in the political discussion yet in general the applied concepts of energy security are rather vague this paper sheds some light on concepts and indicators of energy security first we conceptually discuss the issue of energy supply security and explain why it is not to handle by one science alone and what economics may contribute in order to structure the topic after providing a brief survey of existing attempts to define or measure energy security we suggest an additional dimension along which indicators of energy security may be classified ex post and ex ante indicators finally we illustrate our concept on the basis of several simplified indicators while ex post indicators are mostly based on price developments ex ante indicators are to a greater extent aimed at illustrating potential problems our illustration suggests that it is worthwhile to take into account the market structure along with the political stability of exporting countries

a robust rational route to randomness in a simple asset pricing model abstract we investigate asset pricing dynamics in an adaptive evolutionary asset pricing model with fundamentalists trend followers and a market maker agents can choose between a fundamentalist strategy at positive information cost or choose a trend following strategy for free price adjustment is proportional to the excess demand in the asset market agents asynchronously update their strategy according to realized net profits in the recent past as agents become more sensitive to differences in strategy performance the fundamental steady state becomes unstable and multiple steady states may arise as the traders sensitivity to differences in fitness increases a bifurcation route to chaos sets in due to homoclinic bifurcations of stable and unstable manifolds of the fundamental steady state

on the disequilibrium dynamics of sequential monetary economies the purpose of this paper is to study the dynamic behavior of a sequential monetary exchange economy transactions take place sequentially against non equilibrium prices there is quantity rationing and credit or cash are the only means of exchange agents have optimistic or pessimistic expectations about quantity constraints that represent their beliefs about future trading opportunities in the credit model the agents incur debts along the transition path towards equilibrium while in the cash in advance model convergence takes place without the occurrence of any debts or claims the credit mechanism is shown to act as a soft correction mechanism on credit fluctuations while the cash in advance constraint acts as a hard negative feedback effect driving the prices back towards a neighborhood of a monetary cash in advance equilibrium

wages and job mobility of young workers this paper presents a discrete time version of jovanovic s model of worker firm matching descriptive evidence is presented that supports the notion that unobserved worker firm heterogeneity is an important component in the intertemporal structure of wages for young workers a structural econometric model of wage dynamics under worker firm sorting is developed and estimated finally a formal test of the matching model is carried out and the matching structure on intertemporal covariances of wages is not rejected my results indicate the necessity of jointly considering processes of turnover and wage growth when analyzing the labor market experiences of young workers

the methodological challenges of creating a comprehensive energy security index this short article defends the methods utilized in creating an energy security index it explains why an energy security index is needed and then justifies research interviews as a data collection tool next it responds to the three strands of professor cherp s critique before offering a few general conclusions for readers concerned about energy security

the market for used cars new evidence of the lemons phenomenon the lemons model assumes that owners of used cars have an information advantage over potential buyers with respect to the quality of their vehicles owners of bad cars try to sell them to ill informed buyers while owners of good cars hold on to theirs consequently the quality of traded automobiles tends to be sub average in contrast to previous empirical work the following article investigates the behaviour of both buyers and sellers testing for adverse selection by sellers and for quality uncertainty among buyers with a sample consisting of all 1985 cars registered in the swiss canton of basle city over the period 1985 to 1991 our data supports both adverse selection and buyer uncertainty suggesting that a lemons problem exists

is there sex discrimination in the legal profession further evidence on tangible and intangible margins failure to observe differences between men and women with respect to earnings and or promotions does not preclude the possibility that employers discriminate against women on other intangible margins since female lawyers are highly educated generally and specifically with respect to legal remedies to overt sex discrimination it seems unlikely that employers would discriminate against them on tangible margins indeed drawing from the 1984 american bar association survey of career satisfaction dissatisfaction we find no evidence of discrimination against female lawyers in terms of earnings or promotions we do however find evidence of sex discrimination on several intangible margins and in terms of overall job satisfaction

wages separations and job tenure on the job specific training or matching a general stochastic model of optimal job separation behavior is developed in the paper the model nests both the job training and the job matching hypotheses of the wage tenure relationship as special cases the purpose of the paper is to compare the implications of the two hypotheses for job turnover that expected wealth maximizing separation strategies are qualitatively identical under the two hypotheses is the principal theoretical result although the empirical implications of the two hypotheses for observations on the distribution of completed job spell lengths are similar as a consequence they are not quite identical

differing cultures of energy security an international comparison of public perceptions this study reviews how energy users perceive the importance of energy security dimensions it asks how does the sense of energy security vary with culture its primary source of data is a summary of survey distributed in eight languages to almost 2500 respondents in brazil china denmark germany india kazakhstan japan papua new guinea saudi arabia singapore and the united states it utilizes an energy literacy test in denmark as a secondary data tool the survey results are used to test nine hypotheses about national economic political professional and epistemic cultures the study concludes by affirming the complexity of energy security as a cultural topic by emphasizing how answers among respondents tended to converge more than diverge and by calling for further research

evaluating energy security of resource poor economies a modified principle component analysis approach abstract this study proposes to aggregately measure energy security performance with the principal component analysis in its application of the methodology to four resource poor yet economically advanced island economies in east asia singapore south korea japan and taiwan this study establishes a novel framework to conceptualize energy security the framework incorporates three dimensions vulnerability efficiency and sustainability three indicators being allocated to each dimension the study finds that all the three dimensions are critical for the resource poor economies but have different weights in each of them an urgent task for these four economies is to implement energy efficiency and conservation measures liberalization of electricity sector can be a helpful tool to reduce energy consumption and increase efficiency all of them have been committed to promoting renewable energy development which shall be further expanded in these economies

statistical dynamics and walras law abstract much interest has been shown on identifying the chaotic behavior generated from t tonnement process recently the aim of this article is to direct the research in exploring its statistical dynamical properties two typical types of ergodic t tonnement processes restricted t tonnement and unrestricted t tonnement have been studied their long run statistical characteristics such as time average of price excess demand and inflation rate are discussed in theory and by computer simulations

accounting for complementary skill sets evaluating individual marginal value to a team in the national basketball association identifying an individual worker s contribution to firm production can be difficult in a team setting where spillovers in labor productivity exist among team members this paper studies a model of labor productivity where workers have heterogeneous abilities and can differently affect the productivity of their fellow teammates applying the model to the setting of the national basketball association nba i can identify the marginal value that a basketball player brings to a particular team lineup both through his own individual contributions and his complementary contribution to teammates productivity estimates from the model imply that teammates have a significant impact on individual player productivity and that taking into account spillovers across teammates is important to assessing both overall team productivity and an individual player s contribution to team productivity i then evaluate whether player complementarities are valued in the nba labor market in terms of higher salaries and find that they are undervalued and that players are instead paid mainly for their individual offensive production this creates an asymmetry between player incentives and the team objective to assess the size of this inefficiency the top trading cycle algorithm of shapley and scarf 1974 is used to identify a pareto optimal matching between players and teams that accounts for the complementarities between heterogeneous players skill sets jel j30 l25 l83 m51

polices for increasing energy efficiency thirty years of experience in oecd countries energy efficiency improvement was an important phenomenon in the global energy balance over the past 30 years without energy efficiency improvements the oecd nations would have used approximately 49 more energy than was actually consumed as of 1998 this paper first reviews energy intensity trends for the major oecd nations since 1973 considering how much of the overall reduction in e gdp was due to energy efficiency improvement and how much was due to structural change the bulk of the paper examines the energy efficiency policies and programs adopted in japan united states and western europe commenting on their effectiveness and energy savings impacts where possible the paper also reviews the energy efficiency policies and programs adopted in california this experience shows that well designed policies can result in substantial energy savings as demonstrated in the united states where nine specific policies and programs reduced primary energy use in 2002 by approximately 11 substantial energy savings also occurred in japan some european countries and in the electricity sector in california

flexible parametric estimation of duration and competing risk models in this paper we specify and estimate a flexible parametric proportional hazards model the model specification is flexibly parametric in the sense that the baseline hazard is non parametric while the effect of the covariates takes a particular functional form we also add parametric heterogeneity to the underlying hazard model specification we specify a flexible parametric proportional competing risks model which permits unrestricted correlation among the risks unemployment duration data are then analysed using the flexible parametric duration and competing risks specifications we find an important effect arising from the exhaustion of unemployment insurance and significantly different hazards for the two types of risks new jobs and recalls

on the transition from local regular to global irregular fluctuations abstract we present a general framework for understanding the transition from local regular to global irregular chaotic behaviour of nonlinear dynamical models in discrete time the fundamental mechanism is the unfolding of quadratic tangencies between the stable and the unstable manifolds of periodic saddle points to illustrate the relevance of the presented methods for analysing globally a class of dynamic economic models we apply them to the infinite horizon model of woodford 1988 j economic theory 40 128 137 amended by grandmont et al 1998 j economic theory 80 to account for capital labour substitution so as to explain the appearance of irregular fluctuations through homoclinic bifurcations when parameter values are far away from local bifurcation points

stability and complex dynamics in a discrete tâtonnement model abstract in this paper we study the dynamics of discrete price adjustment processes we show that gross substitutability leads to a kind of stability of the process it guarantees that all prices converge to some bounded region that contains the unique equilibrium price the dynamics inside this region is by no means trivial we demonstrate that as the speed of adjustment increases the process undergoes several bifurcations and the dynamics may become quite complex our approach differs from other literature on t tonnement processes in that our systems are not necessarily one dimensional

a discrete and symmetric price adjustment process on the simplex abstract we study the t tonnement process in an exchange economy with three commodities and three agents we argue that for the multiplicative t tonnement process the simplex is a natural normalization rule we analyse the influence of symmetry in preferences and endowments on the dynamics of the t tonnement process depending on this symmetry there are different bifurcation routes to chaos in particular coexisting attractors may emerge when the symmetric equilibrium price vector becomes unstable this coexistence of attractors is robust in the sense that it also exists for close by asymmetric t tonnement processes

statistical dynamics and economics abstract it is shown in this paper how complex economic dynamics can be characterized using the statistical or distributional theory of dynamical systems the basic concepts of the latter are summarized then applications to supply and demand adjustments in competitive markets aggregate business fluctuations and economic growth in the very long run are briefly reviewed

long term energy services security what is it and how can it be measured and valued abstract the paper reviews some recent approaches towards measuring the extent of long term energy security and security externality valuation it starts out to discuss the contextual connotations of notions of energy security in medium to long term time frames and reviews some indicators that have been proposed to quantify it special attention is paid to two of these approaches which the authors helped to develop i e diversity based indices and the supply demand index the paper takes issue with conventional welfare economic approaches that neglect i the scope on the demand side for raising security and ii negative feedback mechanisms of socio political impacts of international rent transfers in fossil fuels exporting countries the concept of energy services security is proposed with a demand side focus this enables application of an integrated approach to gauge the resilience of a society to meet the needs of its population for energy services over longer timescales ahead from various interrelated perspectives propositions are made on the attribution of security externalities to the use of fossil fuels policies and suggestions for further improvements of measures for energy services security

multi objective optimization of a multiregional electricity system in an archipelagic state the role of renewable energy in energy system sustainability indonesia the world s largest archipelagic state has sizeable fossil and substantial renewable energy resources however high disparity in population density infrastructure economic level and distance between energy sources and consumers inflict a discrepancy in electricity system performance among regions in the present study a multi objective optimization model was developed to support decision makers in selecting the most sustainable scenario for indonesian power generation planning through 2050 to capture regional characteristics more accurately the model was developed with a multiregional approach by dividing indonesia into six regions and a single regional approach is set as a reference for comparison five development scenarios based on economic environmental trade off were proposed and four policy options were incorporated to evaluate the scenario preferences within various priority sets generation mixes obtained from the optimization model were input into a sustainability assessment model consisting of eleven indicators representing three sustainability aspects economic social and environmental the results show that for most policy options the most sustainable electricity system can be achieved by the highest orientation on environmental protection which results in significant advantages regarding most indicators of sustainability however this scenario shows high economic disadvantages relative to the social and environmental benefits the results indicate that optimization with a multiregional approach can capture regional characteristics of an archipelagic state better than that of a single regional approach thereby providing more realistic scenarios for the archipelagic state

spillovers complementarities and sorting in labor markets with an application to professional sports spillovers to productivity across workers may exist when workers produce in teams under certain conditions these spillovers may cause a worker s marginal product to differ across different firms empirical examination of professional basketball finds significant spillovers to offensive productivity but finds relatively little evidence for market sorting based on spillovers thus while teammate composition is important to a player s success there is no evidence for complementarity

indicators for energy security the concept of energy security is widely used yet there is no consensus on its precise interpretation in this research we have provided an overview of available indicators for long term security of supply sos we distinguished four dimensions of energy security that relate to the availability accessibility affordability and acceptability of energy and classified indicators for energy security according to this taxonomy there is no one ideal indicator as the notion of energy security is highly context dependent rather applying multiple indicators leads to a broader understanding incorporating these indicators in model based scenario analysis showed accelerated depletion of currently known fossil resources due to increasing global demand coupled with increasing spatial discrepancy between consumption and production international trade in energy carriers is projected to have increased by 142 in 2050 compared to 2008 oil production is projected to become increasingly concentrated in a few countries up to 2030 after which production from other regions diversifies the market under stringent climate policies this diversification may not occur due to reduced demand for oil possible benefits of climate policy include increased fuel diversity and slower depletion of fossil resources

an international assessment of energy security performance energy security has in recent years grown as a salient policy and political issue to better understand energy security and sustainability concerns this study s main objective is to present an energy security index which measures national performance on energy security over time based on three years of research involving interviews surveys and an international workshop this study conceptualizes energy security as consisting of the interconnected factors of availability affordability efficiency sustainability and governance it then matches these factors with 20 metrics comprising an energy security index measuring international performance across 18 countries from 1990 to 2010 it offers three case studies of japan top performer laos middle performer and myanmar w orst performer to provide context to the index s results it then presents four conclusions first a majority of countries analyzed have regressed in terms of their energy security second despite the near total deterioration of energy security a great disparity exists between countries with some clear leaders such as japan third tradeoffs exist within different components of energy security fourth creating energy security is as much a matter of domestic policy from within as it is from foreign policy without

team effects on compensation an application to salary determination in the national hockey league leo h kahane studies of salary determination largely model pay as a function of the attributes of the individual and the workplace i e employer size job characteristics and so forth this article empirically investigates an additional factor that may influence individual pay specifically coworker productivity data from professional sports are used to evaluate this question because both salary and teammate performance measures are readily available we find that team attributes have both direct effects on an individual s pay and indirect effects through altering the rates at which individual player productive characteristics are valued jel j31 l83 i introduction when complementary exists between labor inputs individual productivity may be poorly measured by treating the individual worker separately from the character of the organization or team within which he works namely individual productivity may vary when working in different settings to the extent that coworkers offer different degrees of assistance 1 if such complementary between human capital inputs is present say a team dynamic it suggests the possible existence of both team and individual effects on productivity and hence compensation empirical analysis of team effects has been hindered by the lack of data on individuals and their coworkers including managers one source though that contains much of this requisite information is data on professional sports teams in this article we exploit this unique attribute of professional sports data in order to empirically assess the effect of complementarities between labor inputs on individual compensation specifically we use a team sport setting to situate the worker in an organizational environment where we can observe the impact of coworkers on individual productivity thereby allowing us to examine the separate effects of individual and team productivity on salary determination the general question asked is whether individual attributes are valued or rewarded differently in different work environments or in our specific case on different teams this study will investigate these questions by empirically assessing the effects of coworker productivity that is the effects of the qual ity productivity of teammates on individual compensation although a number of different highly team oriented sports would serve our purpose such as basketball this particular study uses data from professional hockey to investigate team effects on compensation 2 the remainder of the article is organized as follows section ii outlines the empirical framework used to analyze the posited team effects and discusses some of the theoretical issues relating to team effects on compensation section iii describes the data used in the analysis section iv reports the empirical results and section v reports our conclusions and directions for further work ii team and coworker effects as noted above the goal of this study is to evaluate empirically whether average coworker attributes 1 affect individual salaries 2 affect the rate at which individual attributes are valued by the firm and 3 are complementary inputs to the attributes of individual team members the question arises though as to why we might expect on theoretical grounds that individual players would earn any part of the team s contribution the classic model of alchian and demsetz 1972 suggests that the capitalist manager will reap the returns from any incremental team output as the primary function of the manager is to discover complementarities between inputs and enhance organizational output by optimally combining resources and to monitor effort so as to reduce shirking as a result the manager will capture all of the returns that are not specific to the inputs in which case we would not expect to observe team effects on individual compensation yet although a manager acting as the residual claimant is one solution to the problem of reducing shirking in the context of complementary inputs whose effort is difficult to monitor other models suggest that it may be desirable to compensate team members based on the value of team output in order to provide optimal incentives for effort for example see akerlof 1982

consumer discrimination and self employment self employment rates and incomes differ significantly by race we show that these differentials arise in markets with consumer discrimination and incomplete information about the price of the good and the race of the seller equilibrium income distributions have two properties mean black incomes are lower than mean white incomes and the returns to ability are lower for black than for white sellers able blacks therefore are less likely to self select into the self employment sector than able whites using the 1980 census data we find that observed racial differences in the self employment income distributions are consistent with the theoretical predictions

turnover and promotion of lawyers an inquiry into gender differences this paper analyzes the turnover and promotion of male and female lawyers using data on two cohorts of lawyers one which entered law firms between 1969 and 1973 and the other entering between 1980 and 1983 this study considers whether law firm promotion decisions have differed for women and if so whether these differences have declined over time a competing risks duration model is employed to capture the link between the lawyer s decision to stay or leave and the firm s decision to grant or deny promotion we find that over the entire sample period women are considerably less likely to be promoted and slightly more likely to leave the firm without being promoted however we also find that the parametric differential between men and women in partnership hazards has been reduced substantially and in the most general of our specifications eliminated across the two cohorts in contrast the gap between male and female job turnover rates does not appear to change over time we find that the gap between males and females in the cumulative partnership rate at seven years of experience falls from 32 to 14 percent the turnover gap increases about 0 2 percent with females slightly more likely to exit from the firm in the later period

environmental support energy security and economic growth in japan this study investigates the resource consumption of japanese society since 1979 and its subsequent effects on the economic output of the nation and the environment in order to quantify resource appropriation and trends in production and consumption the concept of emergy synthesis is employed our results show a significant increase in the total amount of emergy consumed by 66 9 between 1979 and 2003 which comes hand in hand with an increase in the level of environmental stress by 93 7 quantified as the environmental loading ratio on the other hand the emergy required to produce 1 usd of economic output has been gradually decreasing which denotes an increase in the efficiency of the conversion of natural capital into economic output what is most interesting though is the growing dependence of the japanese economy on imported emergy increasingly from developing nations that severely affects the potential for unhindered economic growth this can prove to be a big barrier that could affect the resource security of the japanese economy and render it susceptible to risks associated with access to natural resources which in turn can jeopardise its long term economic sustainability

multiple equilibria and chaos in a discrete tâtonnement process the purpose of this note is to demonstrate a sufficient condition for a discrete t tonnement process to lead to chaos in a general equilibrium model with multiple commodities the result indicates that as the speed of price adjustment increases the discrete t tonnement process is complex in a general equilibrium economy in which there are multiple equilibria

matching finding a partner for life or otherwise how do job worker and husband wife relationships form and why do some matched pairs subsequently separate economists and game theorists are in the process of developing and applying an equilibrium explanation of match formation and separation based on the principle of voluntary pairing under competitive conditions the purpose of this paper is to assess the current state of these developments the general existence of patnership structures with the property that no one has an incentive to separate has been established these equilibrium structures maximize aggregate value over the set of all feasible match structures in the transferable utility case according to this pure theory of matching competition for partners can be expected to yield equilibrium match structures that are both stable and socially efficient at least under conditions of frictionless certainty search theoretic models that take account of meeting costs and initial uncertainty about match values have been developed to explain sepa

heterogeneous firms and the organization of production firms in the same industry exhibit systematic differences in the organization of production and the structure of employment entrepreneurial ability is the specific scarce input that limits the size of a firm this input must be allocated to two activities coordinating production and monitoring workers able entrepreneurs can convert calendar time into larger supplies of coordinating effort that enable them to assemble large firms greater ability implies a higher shadow price of time which increases the implicit costs of monitoring a dispersion of entrepreneurial abilities generates an equilibrium size distribution of firms differences in monitoring costs affect the choice of worker productivities the design of products and the organization of production the monitoring cost hypothesis advanced in this paper goes a long way in explaining the equilibrium of an industry containing heterogeneous firms that differ in size and behavior

energy policymaking in denmark implications for global energy security and sustainability denmark is arguably the most energy secure and sustainable country in the organization of economic cooperation and development oecd the country has reduced its dependence on foreign sources of energy to zero and become self sufficient in its own energy production and use offering important lessons for other nations around the world this study explores the core of denmark s successful approach a commitment to energy efficiency prolonged taxes on energy fuels electricity and carbon dioxide and incentives for combined heat and power chp and wind turbines through these commitments the study shows how denmark transitioned from being almost 100 percent dependent on imported fuels such as oil and coal for their power plants in 1970 to becoming a net exporter of fuels and electricity today the country leads the world in terms of exportation of wind energy technology with a hold on roughly one third of the world market for wind turbines it was able to phase out the use of virtually all oil fired power plants in less than five years and implemented a progressive moratorium on future coal fired power plants in the 1990s their most recent strategy seeks to achieve 30 percent of total energy supply from renewable energy by 2025

the japanese energy sector current situation and future paths abstract as the world s third leading economy and a major importer of fuels the choice of future energy paths and policies that japan makes in the next few years will have a significant influence on the energy security of the world as a whole and of the northeast asia region in particular in this article we describe the current status of and recent trends in the japanese energy sector including energy demand and supply by fuel and by sector we then discuss the current energy policy situation in japan focusing on policies related to climate change targets renewable energy development and deployment liberalization of energy markets and the evolution of the japanese nuclear power sector the final section of the article presents the structure of the japan leap long range energy alternatives planning software system dataset describes several alternative energy paths for japan with an emphasis on alternative paths for nuclear power development and ghg emission abatement and touches upon key current issues of energy policy facing japan as reflected in the modeling inputs and results

market clearing and price formation abstract considered here is decentralized exchange of privately owned commodity bundles voluntary transactions take the form of repeated bilateral barters under broad and reasonable hypotheses the resulting process converges to competitive equilibrium price taking behavior is not assumed prices emerge over time they need neither be anticipated nor known at any interim stage