the carbon footprint of uk households 1990 2004 a socio economically disaggregated quasi multi regional input output model this paper presents a socio economically disaggregated framework for attributing co2 emissions to people s high level functional needs based around a quasi multi regional input output qmrio model the study in theory takes into account all co2 emissions that arise from energy used in production of goods and services to satisfy uk household demand whether the emissions occur in the uk or abroad results show that co2 emissions attributable to households were 15 above 1990 levels in 2004 and that although absolute decoupling occurred between household expenditure and co2 during the uk s switch from coal to gas in the early 1990s since then only slight relative decoupling is evident the proportion of co2 that arises outside uk borders in support of uk consumption is rising and reducing these emissions is particularly problematic in a global trading system investigation into the carbon footprint of different segments of the uk population shows wide variation the segment with the highest carbon footprint emits 64 more co2 than the segment with the lowest results show that recreation and leisure are responsible for over one quarter of co2 emissions in a typical uk household in 2004 we conclude that expanding lifestyle aspirations are significant factors in driving household co2 emissions but the study also emphasizes that attention must be paid to the infrastructures and institutions that result in considerable amounts of co2 being locked up in basic household activities through which people meet their everyday needs for subsistence protection and communication with family and friends the findings highlight the sheer scale of the challenge facing uk policy makers and suggest that policies should be targeted towards segments of society responsible for the highest carbon footprints

implicit contracts moral hazard and unemployment this paper considers a firm whose marginal revenue product of labor is a random variable we derive the form of an optimal long term contract between workers and the firm under the assumption that labor s marginal product is observed by the firm but not by the workers we show that the existence of asymmetric information causes unemployment to be greater than in a situation where information about labor s marginal product is public or where employment is determined in spot markets in particular unemployment can occur when the marginal product of labor exceeds the reservation wage

why u s wage and employment behavior differs from that in britain and japan if a poll were to be conducted among american academic economists to select the most mystifying economic phenomenon of our time surely the sticky nominal wage rate would emerge at or near the top of the list the slow and partial response of the nominal wage rate to changes in aggregate nominal spending has been a central postulate of macroeconomic theory for the past 45 years from keynes general theory down to the standard postwar textbook keynesian paradigm to the more modern fixed wage price models of robert barro and herschel grossman i976 and edmond malinvaud i977 unwilling passively to accept nominal wage rigidity as an unexplained assumption many labour market theorists have followed the lead of costas azariadis i975 and martin baily i974 in building models to explain rigid wages and layoff unemployment as the rational outcome of a profit maximising calculus as i pointed out in an early critique of the azariadis baily model i976a their assumptions cannot explain cycles in employment but rather why workers would want fixed incomes i e a fixed wage rate and fixed employment soon thereafter barro i977 went one step further and argued that contract theory is a facade which cannot explain why workers would choose a rigid wage and variable employment in preference to the classical equilibrium quantity of employment that equates the marginal product of labour with the marginal value of time now an examination of the evidence has led me to the realisation that rigid wages cannot provide the underpinnings for a universally valid theory of the business cycle simply because wages are not universally rigid i document below with postwar quarterly data that the share of fluctuations in the manufacturing wage bill taking the form of nominal wage changes as compared to changes in hours worked is five to ten times greater in britain and japan than in

the development of commercial local area resource and emissions modelling navigating towards new perspectives and applications meeting near future uk greenhouse gas ghg emissions targets will require all parts of the uk economy to contribute and in particular significant changes in business practices are required at the local level from review it was found that there is a lack of detailed business accounting and reporting of ghg emissions at the local level especially concerning supply chain impacts and small and medium sized enterprises this paper presents a framework model to generate detailed benchmark estimates of ghgs both on site and supply chain related for individual businesses and all businesses of a sector within an area the model makes use of available economic and environmental data and with similar datasets existing in other parts of the world such models may be used elsewhere the framework model is applied to an empirical case study estimates from such a framework can be used in a step by step approach to move businesses and local areas towards improved accounting reporting and sustainability including procurement the model makes use of two different accounting perspectives the production perspective on site ghgs and the provision perspective supply chain ghgs attributable to purchased inputs of a business or sectors production the new provision perspective and its consequences are explored and explained

willing consumers or locked in policies for a sustainable consumption postmodern explanations of consumer behaviour stress social and psychological factors to the neglect of explanations based on structural issues such as the working life conditions which favour a work and spend lifestyle the conditions of urban living or the effects of pervasive marketing this paper argues that consumers may not be so keen and willing but are rather locked in by circumstances some of these circumstances are deliberately created by other interests and a policy to limit consumption must look for adequate means over a large and varied field in the end shorter working hours may be an important key to a more sustainable future 2002 elsevier science b v all rights reserved

efficient labor contracts with employment risk this article analyzes efficient employment agreements where the demand for consumption insurance can be satisfied by noncontractual means we assume that workers can save and that consumption is determined by a strong form of the permanent income hypothesis under conditions of asymmetric information about exogenous shocks to labor demand we derive a unique compensation schedule that efficiently guides decisions by both workers and employers efficient employment outcomes are generated without a need for third party enforcement or monitoring and workers choose a consumption policy that leaves them indifferent among realizations of labor demand within this solution it is both costless and efficient for workers to delegate employment decisions to the firm within the context of the model we analyze implications for the equilibrium distribution of wages and for empirical studies of labor supply

trade unions and economic efficiency in this paper i shall investigate a role for trade unions in increasing economic efficiency this role is enabling an improvement in the allocation of riskbearing between a firm and its employees the essential idea is straightforward if employers and employees are both risk averse the optimal wage contract will not leave one party bearing all the risk if state contingent contracts are possible grossman and hart 1981 give several reasons for firms being risk averse that firms are indeed risk averse would seem to follow from the fact that employees bear substantial risks few firms offer a job for life at a guaranteed real wage employees bear the risks of layoff redundancy and changes in the real value of their earnings with transactions costs in finding and moving to another job which may be substantial in periods of high unemployment these are real risks yet the states of the world in which these eventualities are to occur are rarely specified in any legally enforceable form indeed it is hard to imagine that they ever could be both because of the problem of envisaging all the relevant states of the world the bounded rationality of simon 1979 and because of the problem of defining those states in such a way that the courts could in the event of a dispute decide which state had occurred in the absence of legal enforceability of state contingent contracts the analysis depends on whether or not decisions about production must be made before a firm knows which state has occurred if they do not have to be then it is not essential to negotiate any contract before the firm knows the state but it may still be desirable from a risk sharing point of view to have a long term contract covering different possible states for that case hall and lilien 1979 and grossman and hart 1981 have argued that some degree of state contingency may be achieved by negotiating a contract which allows the firm in the light of the state which occurs to choose between limited combinations of employment and wages the firm may for example be permitted to reduce wages under the contract but only at the expense of reducing employment so that it is only in its interest to do so if marginal productivity is low this can overcome some of the moral hazard problems arising when states are observed only by firms but as grossman and hart show only at the cost of pareto inefficiency in the employment contract at an empirical level it may explain provisions for compulsory overtime at premium rates this type of contract will work only in the case in which the firm observes the state of the world before making employment decisions but given that

a model of rationing and labour supply theory and estimation a number of authors most prominently clower 1965 and leijonhofvud 1968 have interpreted keynes s theory of unemployment as a disequilibrium model nominal price and wage rigidity prevent the labour market from clearing the actual level of employment is given by the minimum of the effective demand for labour and the effective supply general disequilibrium models of income and employment determination have been developed by barro and grossman 1976 and malinvaud 1977 the model has been extended to the open economy by dixit 1978 and to a two period rational expectations context by neary and stiglitz 1979 the econometric implications of the disequilibrium approach have been developed by goldfeld and quandt 1972 maddala and nelson 1974 and rosen and quandt 1978 among others in summary the disequilibrium approach has provided a fruitful context for analysing macroeconomic behaviour in a competitive walrasian system the notional supply of labour is defined as the amount of labour a worker wishes to provide when he can buy and sell as much as he would like in all markets subject only to his budget constraint and given prices and wages the notional supply of labour then is given by l where 1 c attains the indirect utility function

determinants of portfolio performance in order to delineate investment responsibility and measure performance contribution pension plan sponsors and investment managers need a clear and relevant method of attributing returns to those

measuring resource inequalities the concepts and methodology for an area based gini coefficient abstract although inequalities in income and expenditure are relatively well researched comparatively little attention has been paid to date to inequalities in resource use this is clearly a shortcoming when it comes to developing informed policies for sustainable consumption and social justice this paper describes an indicator of inequality in resource use called the ar gini the ar gini is an area based measure of resource inequality that estimates inequalities between neighbourhoods with regard to the consumption of specific consumer goods it is also capable of estimating inequalities in the emissions resulting from resource use such as carbon dioxide emissions from energy use and solid waste arisings from material resource use the indicator is designed to be used as a basis for broadening the discussion concerning food deserts to inequalities in other types of resource use by estimating the ar gini for a wide range of goods and services we aim to enhance our understanding of resource inequalities and their drivers identify which resources have highest inequalities and to explore trends in inequalities the paper describes the concepts underlying the construction of the ar gini and its methodology its use is illustrated by pilot applications specifically men s and boys clothing carpets refrigerators freezers and clothes washer driers the results illustrate that different levels of inequality are associated with different commodities the paper concludes with a brief discussion of some possible policy implications of the ar gini

employment insurance and competitive equilibrium labor contracts it is now recognized that risk trading between risk neutral firms and riskaverse workers the central theme of implicit contract theory azariadis 1975 baily 1974 and gordon 1974 is sufficient but not necessary to rationalize wage rigidity but is absolutely inconsequential in explaining layoffs rather it is solely the existence of non trivial value of leisure and or outside unemployment compensation that causes workers to prefer the layoff contract over the full employment alternative e g akerlof and miyazaki 1980 pissarides 1981 thus while risk trading per se leads to a contractual labour market the added assumption of differential risk attitudes between riskneutral firms and risk averse workers plays a negligible role in rationalizing the joint phenomena of wage rigidity and layoffs in this paper it is argued that the strong assumption that all firms are risk neutral should be abandoned2 for the following reasons first it can be shown to be neither necessary nor even sufficient for the existence and efficiency of the fixed wage variable employment i e wage rigidity cumlayoff contract second short of perfect negative correlation between profits of different firms which rules out macroeconomic risks shareholders generally cannot diversify away all risks third the presence of transactions costs or inherent differences in information between economic agents suggests that shareholders would differ in their ability to diversify away their risks finally it is not even clear whether shareholders preferences should be of concern the property rights definition of the firm e g fama 1980 indicates that shareholder ownership should be separated from management control thus making managerial preferences the focus of attention for all these reasons we find it necessary in this paper to extend the implicit contract model to accommodate firms with varying degrees of risk aversion in particular we shall demonstrate the properties of the equilibrium contract structure when risk neutral and risk averse firms coexist furthermore we also analyse the interesting question of how increasing uncertainty will affect the various equilibrium contracts the interest of this exercise is due to the fact that existing works that do consider risk averse firms e g akerlof and miyazaki 1980 and grossman and hart 1981 have not proceeded further than the well known observation that replacing risk neutral firms with risk averse firms simply implies that in equilibrium a variable wage across states of nature contract would replace the fixed wage contract but at the same time coexistence of both classes of contracts is commonly observed in any economy hence it is essential to consider a model capable of explaining such a phenomenon

implicit contracts with asymmetric information and bankruptcy the effect of interest rates on layoffs this paper develops a model in which a firm writes labour contracts with workers and debt contracts with creditors firms have more information than do the owners of the factors of production and they are also subject to limited liability we show that if the limited liability constraint is binding then the employment level is inefficient relative to a situation of symmetric information the firm is then embedded into a partial equilibrium model in which the real rate of interest is exogenously determined we show that increases in the real rate of interest increase the inefficiency of the optimal employment contract and lead to layoffs in more states of nature than would occur at lower real interest rates recent literature in the area of implicit contracts has shown considerable interest in the assumption of asymmetric information henceforth a i papers by azariadis 1982 green and kahn 1982 and grossman and hart 1981 have all shown that a i will interfere with optimal risk sharing but although these models produce non walrasian outcomes it is not clear that they are capable of explaining the observed variations in employment over the business cycle in the absence of a link between the level of employment and other macroeconomic variables these new versions of contract theory are open to the charge that they are presenting a complicated explanation of frictional unemployment one potential link between variations in output and variations in intertemporal prices is suggested by models which explicitly allow for the possibility of bankruptcy sappington 1983 has shown that bankruptcy will generate inefficient outcomes even between risk neutral agents and farmer 1984 has shown that if sappington type contracts are incorporated into a macroeconomic structure then the resulting model predicts that bankruptcies will vary countercyclically over the business cycle although bankruptcy is important however it is unlikely that bankruptcies alone will account for all of the output loss during a recession the purpose of this paper is to show that the assumptions of a i and limited liability will generate a model in which the employment level is inefficient and in which the magnitude of this inefficiency varies systematically with the expected real rate of interest this model predicts that the observed increase in the incidence of layoffs during recessions is directly attributable to the effects of high interest rates on aggregate supply some evidence of the phenomenon to be explained is presented below

implicit contracts with heterogeneous labor the formation of implicit contracts in labor markets with heterogeneous employees is studied if layoffs occur the firm finds it optimal to offer differing contracts to differing employees with employees who place a higher priority on leisure accepting contracts with higher layoff probabilities the firm can do so without violating the constraint that employees voluntarily sort themselves into these contracts under plausible assumptions the contracts match the empirical observation that relatively low wage rates and high unemployment probabilities tend to be correlated finally an average or composite wage rate varies over states of nature calling into question the ability of implicit contracts models to account for the constant representative wage rate often found in macroeconomic models

procedures and criteria to develop and evaluate household sustainable consumption indicators abstract communication about very complex problems like household sustainable consumption in simple terms is still a major challenge despite the diversity of tools to measure household consumption clearer indicators are needed to more effectively communicate with the general public the main objective of this research was to develop an approach to define the main procedures and criteria to built household sustainable consumption assessment tools based on indicator sets a review of available household sustainable consumption assessment metrics and related initiatives was conducted this included a comparative analysis of the different approaches the review revealed that the majority of these initiatives are focused upon specific domains e g energy or waste but none used an integrated approach in the sustainable consumption domains furthermore it was found that few methods used indicators to measure and assess household sustainable consumption principal components and a checklist of key good practice factors that a household sustainable consumption indicator system should include were developed due to the need to communicate effectively to engage stakeholders and to address the complexity involved in the measurement and assessment of household sustainable consumption the proposed integrated approach was designed to evaluate household sustainable consumption

performance attribution measuring dynamic allocation skill classical performance attribution methods do not explicitly assess managers dynamic allocation skill in the factor domain the authors propose a generalized framework for performance attribution that decomposes the allocation effect into value added from both static and dynamic factor exposures and thus yields additional insight into sources of manager alpha

a geographically and socio economically disaggregated local household consumption model for the uk abstract a key challenge for local environmental and economic planning is to predict resource flows and material waste arisings at a high level of geographical localisation this paper presents an approach to household consumption modelling in which the material demands of small socio economically homogeneous neighbourhoods are estimated on the basis of consumer expenditure data in conjunction with census data household waste arisings are estimated through incorporation of a household metabolism model selected material flows of consumer commodities such as household appliances carpets and clothing are examined in case study areas representing extremes of relative deprivation and neighbourhoods representing typical examples of the uk national output area classification oac the model will be of use in sustainable consumption policy making and local waste strategy planning

dematerialization and capital maintenance two sides of the sustainability coin abstract the reductionist trend of equating sustainable development with sustained economic growth needs to be reversed new accounts and balances help to operationalize the elusive notion of sustainability they provide a coherent picture of the interaction between environment and economy greened national accounts measure economic sustainability in terms of produced and natural capital maintenance balances of material flows assess ecological sustainability as the dematerialization of production and consumption both concepts aim to preserve environmental assets but differ in scope strength and evaluation of sustainability first results for germany indicate weak sustainability of the economy strong sustainability is not in sight because of insufficient reduction of material throughput attaining sustainability through integrated policies needs the support of share and stakeholders of sustainable development

dynamic labor contracts under asymmetric information abstract this paper discusses the distortion of employment within a two period asymmetric information contracting model in which an exogenous demand shock is serially correlated and is known only to firms the obtained results show that serial correlations of the state of nature can cause not only underemployment but also overemployment even when overemployment never occurs in the context of a static asymmetric information contracting model

a model of the natural rate of unemployment since the publication of edmund phelps volume the new macroeconomics has treated the labor market as a dynamic process of rational search by unemployed workers for available vacancies wages are viewed as at least potentially flexible though free contracting between workers and firms may lead to fixed wages in the short run imperfect information is a crucial element of the theory for it implies both a need for contracting and a need for rational search rather than simple market clearing in each period a positive rate of frictional unemployment may exist in equilibrium denoted as the natural rate this unemployment is due to the frictions in the search process and imperfections in information rather than to any deficiency in aggregate demand milton friedman defined the natural rate as the level that would be ground out by the walrasian system of general equilibrium equations provided there is embedded in them the actual structural characteristics of the labor and commodity markets including market imperfections stochastic variability in demands and supplies the cost of gathering information about job vacancies and labor availabilities the costs of mobility and so on p 8 this paper reexamines the micro foundations of the natural rate in a model of labor market equilibrium in which turnover flows and imperfect information are explicitly considered workers may quit their current jobs to enter the unemployment pool in order to search among available vacancies for a more preferred position firms economize on turnover by an appropriate wage policy

global equity fund performance an attribution approach using data on portfolio holdings we examine the performance of 143 global equity funds over 2002 2012 we find that the average global equity manager outperforms the benchmark by 1 2 1 4 a year before fees attribution analysis reveals that the prime source of excess return is selecting stocks that beat their local markets modest contributions come from country selection most notably in emerging markets whereas currency effects are mixed our findings support considering active management in global equity markets at least for institutional accounts that pay annual fees of less than 1