the structure of unemployment we test for a unit root in postwar unemployment rates for sixteen oecd countries when a one time structural break is incorporated the unit root hypothesis can be rejected for most of the countries and the measured persistence of unemployment falls dramatically we then test for multiple structural changes and find evidence of one or two breaks for those countries for which the unit root hypothesis could be rejected almost all of the breaks are positive reflecting the sustained rise in european unemployment the major exception is the united states where long term unemployment rose in the 1970s and fell in the 1980s

using real option analysis for highly uncertain technology investments the case of wind energy technology this study examines the feasibility of using a theoretical model and empirical analysis methods to value renewable energy re investment from perspective of real option analysis roa based on use of a roa approach the re value is evaluated with respect to its ability to conform to the main sensitivity analysis of re investment as well as an empirical method devised to value re investment by using actual data the economic intuitiveness underlying the decision making process for re investment is elucidated while empirical analysis is performed to demonstrate the effectiveness of the options value embedded in current development planning in taiwan for wind energy in addition to revealing the advantages of re development when considering real option analytical results indicate that roa is a highly effective means of quantifying how investment planning uncertainty including managerial flexibility influences re development besides evaluating the value of current re investment this study demonstrates that results of the theoretical model empirical analysis and sensitivity analysis correlate well with each other restated the value of developing re increases when increasing the underlying price time to maturity risk free rate and volatility conversely the value of developing re decreases when increasing the exercise price

estimating the natural rate of unemployment in euro area countries with co integrated systems given that for france germany italy and the netherlands the unemployment rates are best classified as i 1 we apply permanent transitory decompositions based on co integrated vector autoregressions var with relevant variables labour productivity wages tax wedges foreign relative prices to estimate the time varying natural unemployment rates in general all variables seem to matter and the results are quite different from published organization for economic co operation and development oecd nairus our implied unemployment gaps are better than the oecd gaps in predicting unemployment changes and inflation gaps but they are except for italy as bad as the oecd gaps for forecasting inflation changes

co2 emissions from china s power sector at the provincial level consumption versus production perspectives abstract the chinese electricity sector plays an important role in domestic co2 mitigation efforts due to its large contribution to overall emissions however primary energy resources used for electricity generation are not evenly distributed across the country such a supply and demand mismatch in reality results in large parts of electricity to be transferred from economically less developed provinces in the west to economic growth centres in the east a literature review shows that the emissions embodied in electricity transfer within china have not been explicitly studied although in fact they cause a shift of environmental pollution away from economically well off provinces to resource rich and less developed provinces therefore it is critical for policy makers to address this issue under such a circumstance a bottom up model is developed to calculate direct co2 emissions embodied in electricity export and import between chinese provinces it helps quantifying emissions from the power sector associated with both production and consumption perspectives and sheds lights on the environmental impact of regional supply and demand mismatch in china results show that the difference between consumption and production based co2 emissions from electricity sector in some provinces were higher than the total co2 emissions from electricity sector in netherlands in the case of beijing or as high as the total co2 emission from france s electricity sector in the case of guangdong based upon chinese realities policy implications and suggestions are made such as how to set up appropriate emission reduction targets for electricity sector at provincial level and the inclusion of consumption emissions in designing china s cap and trade mechanism the methodology and findings may be useful for investigation of embodied emissions throughout various regions of the world

wage norms capital accumulation and unemployment a post keynesian view the paper presents a post keynesian view of unemployment it argues first that the effective labour demand need not be downward sloping with respect to real wages and aggregate demand need not be downward sloping with respect to inflation second that there is a broad case for unemployment hysteresis understood as endogeneity of the non accelerating inflation rate of unemployment nairu based on social norms in wage bargaining and on the supply side effects of capital accumulation and third that much as keynes argued capital investment rather than labour market institutions is the key variable to explain changes in aggregate unemployment performance across countries and over time overall the paper advocates a keynesian view of the nairu where effective demand determines unemployment in the short run and the deviation of actual unemployment from the nairu determines the change in inflation in the medium term the nairu is endogenous and follows actual unemployment copyright 2011 oxford university press

structural evolution of the postwar u s economy we consider a time varying parameter vector autoregressive model with stochastic volatility and mixture innovations to study the empirical relevance of the lucas critique for the postwar u s economy the model allows blocks of parameters to change at endogenously estimated points of time contrary to the lucas critique there are large changes at certain points of time in the parameters associated with monetary policy that do not correspond to changes in reduced form parameters for inflation or the unemployment rate however the structure of the u s economy has evolved considerably over the postwar period with an apparent reduction in the late 1980s in the impact of monetary policy shocks on inflation though not on the unemployment rate related we find changes in the phillips curve tradeoff between inflation and cyclical unemployment measured as the deviation from the time varying steady state unemployment rate implied by the model in the 1970s and especially since the mid 1990s

time variation in the persistence of unemployment over the past century abstract this paper investigates the persistence of the unemployment rate for the uk and the us over the past century by modeling the persistence to randomly evolve over time the estimated autoregressive coefficient exhibits significant variation over time indicating the fluctuation between the hysteresis and mean reverting phases we find that the hysteresis phase is to a considerable extent associated with economic downturns caused by macroeconomic shocks with the unemployment rate during this phase showing large deviations from the estimated natural rate of unemployment in contrast for the periods conforming to the natural rate theory the actual unemployment rate fluctuates relatively closely around the estimated natural rate of unemployment

developing effective policies for the sustainable development of ecological agriculture in china the case study of jinshan county with a systems dynamics model abstract this paper focuses on a search for concrete policy measures to facilitate the overall sustainability of ecological agricultural development at a county level for this purpose a system dynamics model aiseem has been developed to explore the potential long term ecological economic institutional and social interactions of ecological agricultural development through a case study of jinshan county in china the model provides an experimental platform for the simulation and analysis of alternative policy scenarios the results indicate that the diversification of land use patterns government low interest loans and government support for training are important policy measures for promoting the sustainable development of ecological agriculture at least in the case study context in addition the study reveals that environmentally sound technology e g biogas project alone cannot sufficiently induce farmers to adopt ecological agricultural practices limited availability of information risk aversion and high transaction costs are major barriers to the adoption of alternative agricultural practices in this regard the importance of capacity building and institutional arrangements are emphasised through the development of an improved policy making process on agricultural sustainability this case study highlights the importance of combining the ecological economics analytical framework with the system dynamics modelling approach as a feasible integrated tool to provide insight into the policy analysis of ecological agriculture and thus set a solid basis for effective policy making to facilitate its sustainable development on a regional scale

the economics of worldwide stagflation the last fifteen years have witnessed dramatic changes in economics not only in the manner in which the economics profession views economics but also in the manner in which the general public views economics and economists by the late 1960 s there had emerged more or less a consensus macroeconomic framework that is an agreed upon structure to be used to study economic problems at the aggregate level robert solow stated as quoted in leijonhufvud 1968

progress and prospective on the police system of renewable energy in china abstract the renewable energy law has been formulated by china government in 2005 during the next few years there has been dramatic progress in china s renewable energy industries along with the formation of the policy system of renewable energy in china it is widely recognized that a reasonable and effective policy system can lay the solid foundation for the development of renewable energy regarding the rapid growth of renewable energy with a host of relevant policies issued in china there is an urgent need to study the policy system of renewable energy in view of the latest situations to further promote the development of renewable energy this paper is a systematical review about the promotion of china s policy system of renewable energy since renewable energy law issued achievements on the policy system of renewable energy in 2011 as of 2005 are discussed experiences from recent periods are drawn and factors limiting the policy system of renewable energy are also addressed in details to probe the policy predicament and solutions the development tendency of renewable energy is presented and the framework is drafted to set the framing constraints for china s policy system of renewable energy finally policy suggestions are proposed for the successful implementation of renewable energy policies within the framing constraints of the policy system and the long term healthy development of renewable energy in china

hysteresis in unemployment after two decades of ratcheting unemployment in europe most economists agree that structural changes associated with higher equilibrium rates of unemployment have occurred but the direction of causality is a matter of controversy have the structural changes caused the long lasting increases in actual unemployment or have the increases in actual unemployment caused the structural changes the latter possibility is often referred to as hysteresis during the past decade a distinct research program has evolved around the idea that equilibrium employment tracks actual unemployment this survey reviews the various hysteretic explanations offered in the literature and evaluates their empirical standing

unit roots and structural breaks in oecd unemployment abstract we apply unit root tests that allow for two endogenous break points in the unemployment rates of 26 oecd countries our results show that unit root tests that do not account for structural breaks are misspecified and suggest excessive persistence

structural breaks in renewable energy in south africa a bai perron break test application abstract in order to remedy the continuous problem of sustainable energy supply the south african government committed itself to pursuing renewable energies re as a viable alternative to traditional sources such as fossil fuels the aim of this study is to understand whether the policies pursued by the south african government in the period 1990 2010 have had any effect on the consumers and producers of re to do so the bai perron 1998 2003 break test methodology is employed to examine the evolution of re production and consumption deviations from the base case are then explained in the south african economic and policy context

trend stationary of inflation rates evidence from lm unit root testing with a long span of historical data the article applies the lm univariate unit root test recently developed by lee and strazicich 2003 2004 to re examine the validity of trend stationary in the inflation rates of 11 oecd and asian countries using a longer span of historical data our empirical findings are favourable to the trend stationary of the inflation rates when we control the structural breaks in series and therefore they point to the absence of hyperinflation in the majority of the countries the results indicate that shocks to inflation rates are temporary and soon converge with the inflation rates being trend stationary hence most structural breaks in the inflation rate occur around the great depression world war i world war ii and energy shock periods for the convergence effect we repeat the unit root tests utilized above for smaller sub samples so as to provide a robust analysis the outcomes show that by selecting a longer data span we can catch more powerful convergent evidence overall some policy implications a

common smooth transition trend stationarity in european unemployment abstract this paper analyzes the hypothesis of hysteresis in europe the results are favorable to smooth transition trend stationarity in european unemployment rates around highly persistent structural changes in addition we find evidence of a common force that generates this nonlinear behavior

model selection based unit root detection in unemployment rates international evidence a model selection based unit root detection by using the bayesian information criterion is proposed first six alternative model classes are obtained considering the presence or absence of a unit root and considering three kinds of deterministic terms no constant constant constant and trend second given the selected model class the best model is selected from the alternative models with different lags third the best of the entire model set comprising the six models obtained in the preceding step is selected finally whether an observed time series contains a unit root is determined on the basis of the selected model simulation results suggest that the proposed method is at least comparable to and often better than the sequential testing method provided by dolado et al 1990 empirical results obtained by the proposed method are more convincing than those obtained by the sequential testing method and suggest that the hysteresis hypothesis can be applied to monthly time series of the unemploym

price level targeting vs inflation targeting a free lunch price level targeting without base drift and inflation targeting with base drift are compared under commitment and discretion with persistence in unemployment price level targeting is often said to imply more short run inflation variability and thereby more employment variability than inflation targeting counter to this conventional wisdom under discretion a price level target results in lower inflation variability than an inflation target if unemployment is at least moderately persistent a price level target also eliminates the inflation bias under discretion and as is well known reduces long term price variability society may be better off assigning a price level target to the central bank even if its preferences correspond to inflation targeting a price level target thus appears to have more advantages than commonly acknowledged

hysteresis in east asian unemployment high performing asian economies are quite distinctive with efficient flexible and responsive labour markets comparing the persistence of unemployment in east asian economies to that in western countries is difficult due to the data s short time spans and possible structural breaks this article employs advanced unit root tests to deal with these problems and fails to reject hysteresis in the unemployment rates of the high performing asian countries even after taking into account structural change an alternative explanation of different productivity growth for the hysteresis phenomenon of the asian countries is proposed herein

the impact of monetary policy on unemployment hysteresis this article investigates the hypothesis that the extent to which hysteresis occurs in the aftermath of recessions depends on monetary policy reactions the degree of hysteresis is explained econometrically by the extent of monetary easing during a recession and by standard variables for labour market institutions in a pooled cross country analysis using quarterly data the sample includes 40 recessions in 19 organization for economic co operation and development oecd countries for which the required data is available the time period lasts for the period from 1980 to 2007 this article builds on ball 1999 and extends the sample of countries the time period under investigation and the set of control variables

which factors are effective for farmers biogas use evidence from a large scale survey in china the chinese government since 1995 has carried out programs for the construction of household biogas digesters in the chinese countryside despite the large governmental spending in the building of household biogas digesters only 12 16 of the households suitable to produce and use biogas have built a digester li 2009 this article asks which factors on the household level may be important for the decision whether or not to build a biogas digester based on a survey with 1227 households from guangxi hubei shandong and gansu provinces results of a binary probit model show that the governmental promotion of biogas has a significant effect on households decision the question arises which households may if governmental programs were to be running out be most likely to construct a household biogas digester the household head s age the number of household members staying at home the total household income and the subjective discount rate of the respondents are significant factors in a farm household s decision to build a biogas digester however also agro climatic conditions reveal to be decisive which is why technical solutions for tackling the low productivity of biogas digesters in cold regions may need to be further considered

challenges facing natural rate theory abstract this paper attempts to test the natural rate hypothesis by looking at historical unemployment data for france the uk and the us we find that the unemployment series can be described as stationary around an infrequently changing mean moreover that the speed of convergence towards mean unemployment is slower when unemployment is high and differs across the three countries the two european countries having more persistence we do not find any evidence that the persistence of a change in unemployment is a function of the size of the change we conclude that the data are consistent with multiple equilibria models where large shocks bring the economy from one equilibrium to another and also with models with a moving natural rate

the development of renewable energy in resource rich region a case in china abstract with the largest population living in rural areas the lack of clean energy supply is an important problem in china and the utilization of renewable energy not only meets the demand of energy but also provides a basis for environmental protection and sustainable development this paper reviews use of clean energy in a resource rich region including the basic principle of the development of recycling agriculture the potential the present status and the future of renewable energy in the region rural areas if the project will be finished there will be 300 000 families benefiting from it and it can bring at least 2 2 108 us dollars revenue increase directly the indirect revenue increase will be 0 15 billion us dollars the environment will be improved and the living standard in jincheng s rural areas is also be greatly improved because of developing biogas project based on the developing status and constraint conditions the solutions to further promote renewable energy projects in this region are also proposed

the new econometrics of structural change dating breaks in u s labor productivity we have seen the emergence of three major innovations in the econometrics of structural change in the past fifteen years 1 tests for a structural break of unknown timing 2 estimation of the timing of a structural break and 3 tests to distinguish unit roots from broken time trends these three innovations have dramatically altered the face of applied time series econometrics in this paper we review these three innovations and illustrate their application through an empirical assessment of u s labor productivity in the manufacturing durables sector

unemployment a survey this paper presents a survey of the economics of unemployment it covers competitive and imperfect competition models the role of different methods of wage determination and explanation of postwar unemployment patterns in the oecd countries copyright 1990 by royal economic society

enhancing renewable and sustainable energy development based on an options based policy evaluation framework case study of wind energy technology in taiwan global warming and climate change have shifted the focus of industrial development towards low carbon renewable energy re as evidence by global efforts to develop re based sustainable energy policies however the generally cost ineffective nature of re investments explains continued governmental subsidies and draft assistance measures to encourage related industrial development reduce research and development r d costs and increase innovativeness besides measures to accelerate supply and reduced demand for energy sustainable energy policies must enact thoroughly planned legal and regulatory mechanisms notable examples of establishing a legal basis for a low carbon society in taiwan include the energy management act renewable energy development bill greenhouse gas reduction act draft and energy tax act draft however such legislative efforts occasionally conflict or compete with each other warranting further integration additionally re technologies are characterized by high r d costs long term planning and high investment risks therefore based on global trends in wind power development and related policy planning this study analyzes the feasibility of implementing management strategies in the development process and the correlations between such strategies additionally the achievements polices functions mechanisms promotion measures and future plans for related renewable and sustainable energy laws in taiwan is thoroughly reviewed an options based policy evaluation framework is also constructed based on governmental administrative considerations moreover the characteristics of options that lead to unforeseen circumstances during the planning of re development policies are discussed allowing us to derive real time response measures with a decision making value results of this study provide a valuable reference for governmental efforts to evaluate the merits and limitations of related policies concisely ultimately facilitating the formulation of re development policies

different ways of looking at old issues a time series approach to inequality and growth in this article we propose an econometric approach that steers clear of parameter heterogeneity omitted variable bias and endogeneity problems from which suffers the econometric analysis of economic growth we propose to investigate the relation between income inequality and economic growth in a cointegrated var setting and present an application to belgium us and finland

macroeconomic shocks in a dynamized model of the natural rate of unemployment at the microeconomic level this paper revises and broadens the theory of the equilibrium rate of unemployment the natural rate in a monetary model the authors begin by recreating steven salop s turnover model of the natural rate in its naturally intertemporal version useful findings on impact effects and the adjustment process at the individual firm necessarily excluded by the static version are shown to derive from the dynamized model at the macroeconomic level the authors then provide a general equilibrium analysis of some shocks showing how they drive the equilibrium unemployment rate and in varying ways also disturb the real rate of interest copyright 1992 by american economic association

the nature of occupational unemployment rates in the united states hysteresis or structural this article provides new evidence on the nature of occupational differences in unemployment dynamics which is relevant for the debate between the structural or hysteresis hypotheses we develop a procedure that permits us to test for the presence of a structural break at unknown date our approach allows the investigation of a broader range of persistence than the 0 1 paradigm about the order of integration usually implemented for testing the hypothesis of hysteresis in occupational unemployment in almost all occupations we find support for both the structuralist and the hysteresis hypotheses but stress the importance of estimating the degree of persistence of seasonal shocks along with the degree of long run persistence on raw data without applying seasonal filters indeed hysteresis appears to be underestimated when data are initially adjusted using traditional seasonal filters

jump dynamics with structural breaks for crude oil prices this study investigates the joint phenomena of permanent and transitory components in conditional variance and jump intensity along with verification of structural breaks for crude oil prices we adopt a component arji model with structural break analysis utilizing daily data on west texas intermediate crude oil spot and futures contracts the analytical results verify the existence of permanent and transitory components in conditional variance with the permanent component of conditional variance increasing with the occurrence of a sudden major event such as the iraqi invasion of kuwait operation desert storm and the war between the us and iraq and a relatively greater increase in the transitory component over the same period notably jump intensity fluctuates with an increase in the transitory component of conditional variance in response to abnormal events it is the transitory component which serves as the primary influential factor for jumps in returns therefore speculators are willing to take large risks particularly with respect to anticipating future price movements or gambling in the hopes of rapidly making substantial gains thus speculators prefer the temporary volatility component and engage in trade activities however investors prefer the permanent volatility component because they may well be better off relocating their assets into more stable portfolios to outperform the market portfolio over the long run

behind this structural boom the role of asset valuations we are in the midst of a structural boom the force of which has not been seen in this country since the 1920 s after the u s unemployment rate hit 6 percent in late 1994 following its two year recovery many experts assumed that unemployment had regained its naturalrate path the natural unemployment rate in the second half of the 1980 s had been put at around 6 5 percent in several estimates and if the trend reduction in the natural rate brought about by the continuing relative decline of high school dropouts in the labor force and those whose education stopped at the diploma is placed at 0 07 per annum it would have declined on that account to around 6 percent by 1995 phelps and gylfi zoega 1997 furthermore we saw in 1995 the end of

market opening regulation and growth in europe deregulation a political economy analysis lack of urgency explains why continental europe trails in the deregulation process yet there are lessons to be learnt from deregulation elsewhere this paper reviews the situation and focuses on the political preconditions for successful deregulation it finds a clear negative relationship between regulation and economic performance it characterizes european countries by the degree of regulation of labour and product markets and finds that the latter seems to be more important for economic performance finally it notes the importance of a proper management of the deregulation effort which may include some re regulation deregulation is more likely to succeed the more transparent the economic benefits and the more clearly stated the objectives and the time schedule kees koedijk and jeroen kremers

gaussian demand and commodity bundling in an important and widely cited essay adams and yellen 1976 examine the use of package selling as a price discrimination device they consider a monopolist producing two goods with constant unit costs and facing buyers with diverse tastes the marginal utility of a second unit of either good is assumed to be zero for all buyers the two goods are independent in demand for all buyers so that any buyer s reservation price for the first unit of either good is independent of the market price of the other thus the maximum amount any buyer would pay for a bundle consisting of one unit of each good is the sum of the two reservation prices and buyers are completely described by the values of those two prices 2 resale markets are assumed away in order to obtain comparative results for alternative pricing strategies the distribution of reservation prices in the adams yellen framework is assumed to be bivariate normal implications of gaussian demand are explored pure bundling is shown to operate by reducing buyer diversity thus facilitating the capture of consumers surplus it generally makes buyers worse off than unbundled sales it is more profitable if average reservation prices are high enough mixed bundling combines advantages of both pure bundling and unbundled sales and it is generally strictly more profitable than either bundling which treats goods symmetrically seems most attractive under symmetric reservation price distributions i am indebted to severin borenstein for superb research assistance to the ford motor company for research support through a grant to m i t and to the harvard economics department for housing me as a visiting scholar while most of this research was performed of course only i can be held responsible for this essay s shortcomings 1 the first clear recognition of this possibility seems to have been by stigler 1968 but also see burstein 1960 2 paroush and peles 1981 relax the assumption that consumers purchase at most one unit of each good but they consider only two types of buyers both with linear demand functions they retain the assumption that demands are independent for all buyers telser 1979 and phillips 1981 use different frameworks to analyze bundling policies spence 1980 explores the relation between bundling across commodities as here and bundling multiple units of the same

a review on the development and commercialization of biomass gasification technologies in china with the fast economic growth the energy demand in china has increased two fold in the past three decades various energy resources have been exploited and utilized and biomass is one of the energy resources that is abundant and has been widely used in china for a long time biomass gasification is an efficient and advanced technology for extracting the energy from biomass and has received increasing attention in the energy market in this paper the development of biomass gasification for various energy applications in china is reviewed and their prospects are discussed among the different biomass gasification technologies biomass gasification and power generation is found to be the most promising biomass gasification technology that has great potential to be further developed in china

in search of the natural rate of unemployment abstract the natural rate of unemployment can be measured as the time varying steady state of a structural vector autoregression for post war us data the natural rate implied by this approach is more volatile than most previous estimates with its movements accounting for the bulk of the variation in the unemployment rate as well as substantial portions of the variation in aggregate output and inflation these movements in turn can be related to variables associated with labor market search theory including unemployment benefits labor productivity real wages and sectoral shifts in the labor market there is also a strong negative relationship between inflation and the corresponding measure of cyclical unemployment supporting the existence of a short run phillips curve

unemployment persistence does the size of the shock matter one of the stylized facts of unemployment is that shifts in its mean rate between decades and half decades account for most of its variance in this paper we use a statistical analysis based on markov switching regression models to identify the dates of infrequent changes in the mean of the unemployment rate series of fifteen countries we find that in most countries unemployment persistence is much reduced once the infrequently changing mean rate induced by large shocks to unemployment has been removed we conclude that the observed persistence in unemployment appears to be consistent with multiple equilibria models and models with an endogeneous natural rate 1998 john wiley sons ltd

unit root tests persistence and the unemployment rate of the u s states author affiliation diego romero avila department of economics carretera de utrera km 1 pablo de olavide university 41013 seville spain dromtor upo escarlos usabiaga professor department of economics carretera de utrera km 1 pablo de olavide university 41013 seville spain cusaiba upo es corresponding author acknowledgment the authors would like to thank seminar participants at the pablo de olavide university and dg economics at the european central bank carlos usabiaga acknowledges the financial support from centro de estudios andaluces ecod1 05 033 special thanks go to junsoo lee and nikolay gospodinov for making available to us the codes to implement some of the techniques used in the paper and to two anonymous referees for suggestions that substantially improved the paper the usual disclaimer applies 1 introductionthe high persistence in unemployment rates observed in the developed world since the first oil shock has led to a vivid debate over which paradigm can better explain the behavior of unemployment rates the traditional strand of the literature that forms the basis of the natural rate theory phelps 1967 1968 friedman 1968 assumes that the unemployment rate evolves around an equilibrium level describing stationary fluctuations this equilibrium level or natural rate is set depending on fundamentals of the economy while initially the absence of theories explaining the determination of the natural rate meant that in practice it was taken to be constant and exogenous subsequent developments have attempted to identify the structural factors behind differences across economies and over time including labor productivity technological change real interest rates real exchange rates and energy prices to name a few see phelps 1994 phelps and zoega 1998 according to the structuralist view phelps 1994 most shocks to unemployment are temporary but occasionally the natural rate permanently changes and is affected by variations in the aforementioned structural factors as a consequence the unemployment rate may be characterized as a process that is stationary once a small number of structural breaks are allowed for in contrast to the natural rate and structuralist approaches the hysteresis hypothesis see blanchard and summers 1986 1987 implies that the unemployment rate is path dependent and temporary shocks can affect unemployment permanently 1 while hysteresis is thought to imply that the natural rate is conditioned by the level of unemployment recorded in the past persistence in unemployment which is a special case of the natural rate hypothesis entails a slow adjustment process of reversion toward the mean thus hysteresis implies that unemployment is characterized by a unit root while persistence is characterized by a near unit root in the latter case shocks to unemployment though long lasting would not have a permanent effect to discriminate among theories explaining the behavior of unemployment rates unit root tests have been widely applied the hysteresis hypothesis has been formulated as a unit root process and its rejection lends support to the natural rate hypothesis if no breaks are included in the specification and the structuralist hypothesis if breaks are allowed for the purpose of this article is to investigate which theoretical paradigm most closely represents the behavior of unemployment rates in the states of the united states over the period 1976 2004 we first apply the individual lagrange multiplier lm t statistic proposed by schmidt and phillips 1992 to monthly data and we fail to reject the null hypothesis of a unit root in unemployment for forty states perron 1989 pointed out that the presence of structural changes could favor the nonrejection of the unit root null if they are not properly accounted for therefore we employ the minimum lm t statistic allowing for up to two endogenous changes in level proposed by lee and strazicich 2003

history gravity and international finance abstract we analyse patterns of bilateral financial investment using data on us holdings of foreign bonds we document a history effect in which holdings seven decades ago continue to influence holdings today 10 15 of the cross country variation in us investors foreign bond holdings is explained by holdings 70 years ago plausibly reflecting fixed costs of market entry and exit and endogenous learning this effect is twice as large for bonds denominated in currencies other than the dollar suggesting the existence of even higher fixed costs of initiating us foreign investment in such currencies our findings point to history and path dependence as key sources of financial market segmentation

natural rate theory and oecd unemployment our mission is to examine from the perspective of the intertemporal equilibrium models of endogenous natural rate theory the huge swings in unemployment among the oecd countries in recent times we first look at the huge rise in jobless rates between the early 1970s and the early 1990s throughout the oecd in the united states a rise from about 51 per cent to 7 per cent canada from about 6 to 10 japan from 11 to 21 italy from 31 to about 71 the united kingdom from about 33 to about 9 france from about 23 to about 10 and west germany from 4 to 5 1 we then look at the developing recovery of the general unemployment rate most notably in the united kingdom and the united states amid a generally continued elevation of jobless rates among the less educated we see the mid 1990s surge of unemployment in germany france and italy as another story there are other older perspectives of course keynesians interpreted events in the 1970s and in the 1980s as signs of effective demand and effective supply shocks feldstein 1986 fitoussi and phelps 1986 malinvaud 1985 pissarides 1990 but if the natural rate was unchanged they had to explain why the subsequent disinflation was short lived why inflation even turned up in the late 1980s or early 1990s despite high unemployment lacking an endogenous natural rate keynesians could explain the durability of the slump only by positing either a permanent expectational disequilibrium or hysteresis i e non ergodicity as in phelps 1972 or a degree of persistence so great as to be empirically indistinguishable from hysteresis as the slump ran on the expectational possibility wore thin so they were down to hysteresis hicks 1974 launched a break with the keynesian monetarist perspective in the 1980s with his appeal to real frictions or rigidities if wage setting mechanisms make the real wage v sticky in the sense of lerner hence predetermined in the short run the unemployment rate u will rise in the short run in response to a shock contracting the demand wage i e a downward shift of the labour demand schedule in the 1 u v plane bruno and sachs 1985 another landmark was a bargaining model with the property that its natural unemployment rate rose in response to several much discussed shocks such as higher taxes and an energy shock reducing labour productivity layard and

does the time consistency problem explain the behavior of inflation in the united states abstract this paper derives the restrictions imposed by barro and gordon s theory of time consistent monetary policy on a bivariate time series model for inflation and unemployment and tests those restrictions using quarterly us data from 1960 through 1997 the results show that the data are consistent with the implications of the theory for the long run behavior of the two variables indicating that the theory can explain the initial rise and subsequent fall of inflation over the past four decades the results also suggest that the theory must be extended to account more fully for the short run dynamics that appear in the data

converting unemployment benefits into employment subsidies although unemployment benefit systems vary widely among oecd countries they all tend to increase the unemployment whose effects they are meant to mitigate the reasons are well known they push up wages by improving workers fall back positions in wage negotiations and they discourage job search for when unemployed people find jobs their unemployment benefits are withdrawn and they have to pay taxes thereby many unemployment benefit systems not only generate inefficiencies and inequities in their own right but also augment common labor market failures particularly those highlighted by the efficiency wage insider outsider and union theories these market failures have serious dynamic consequences for the longer people are unemployed the more their skills erode and the more discouraged and stigmatized they become in the job search process when unemployment benefit systems amplify these dynamic effects they put the long term unemployed at a greater disadvantage in competing for jobs this disadvantage is augmented by market failures in the provision of training the long term unemployed often have had relatively little opportunity to acquire firmspecific skills and thus in imperfectly com

aggregate supply and demand factors in oecd unemployment an update unemployment in the oecd countries has continued to rise to unprecedented levels the eec countries which on average ended the turbulent 1970s with an unemployment rate of close to 7 per cent are now in the mid 1980s approaching an 11 per cent level the united states is virtually the only country for which the changes in unemployment during the 1970s have not been systematically upward and for which the 1984 rate was more or less back to where it had been both ten years and five years earlier see figure 1 the reasons for the sustained increase in unemployment during the 1970s as well as the possible reasons for differences in patterns across industrial countries have been studied but question marks undoubtedly remain our own emphasis in an earlier study has been on the combination of the great supply shocks of the previous decade and the contractionary macro policy response of most oecd countries to these shocks as well as on the more recent policy coordination problem between the united states and europe with a few more years that have elapsed and quite a few percentage points of additional unemployment there is obviously room for both an update and a reappraisal starting from a fairly conventional aggregate supply as and aggregate demand ad macro framework an increase in unemployment may come

wage setting and unemployment persistence in europe japan and the usa the persistence of high unemployment in the main european economies is one of the most puzzling economic developments of the past fifteen years average japanese unemployment has risen slightly since the mid seventies whereas unemployment in the united states still exhibits cyclical fluctuations around a gently rising level in marked contrast average unemployment in france germany and the united kingdom rose to a higher plateau during the latter part of the seventies shot up again in the early eighties and has remained persistently high identification of the causes of such unemployment persistence is crucial before one makes policy recommendations three possible causes spring to mind first persistence in the determinants of equilibrium and disequilibrium unemployment second excessive power of insiders in wage setting combined with high correlation between employment status and insider status and finally a high degree of state dependence sluggishness in labour demand although in general one expects all three causes to have played a role in the persistence of high european unemployment there is still a need to identify their relative importance the first set of factors has been assessed empirically in recent papers by among others sachs 1983 bruno and sachs 19x5 bruno 1986 layard and nickel1 1985 bean layard and nickel1 1986 newell and symons 1985 and others many of these papers have also allowed for sluggishness in labour demand although they did not particularly focus on it the second set of factors has been investigated by blanchard and summers 1986 who concluded that there is evidence of much higher correlation between employment status and insider status in the three largest european economies than in the united states

on the structure of us unemployment disaggregated by race ethnicity and gender abstract we present empirical evidence regarding the structure of unemployment in the us disaggregated by race ethnicity and gender popp s 2008 unit root test reveals that the dynamics of unemployment for all groups is characterized by the hysteresis hypothesis except for hispanic males

evidence on the dynamics of unemployment by gender we present empirical evidence regarding unemployment dynamics for women and men in eight oecd countries unit root tests are used to examine the unemployment dynamics of women and men failure to reject the unit root hypothesis is consistent with unemployment hysteresis rejection of the unit root hypothesis indicates that unemployment dynamics are best explained by the natural rate of unemployment or the structuralist view we find evidence of gender differences in unemployment dynamics in canada germany and the us but not in other countries while there are some differences in the extent of persistence across gender and across countries the degree of persistence for both female and male unemployment rates is fairly low in all countries our results therefore contrast with substantial empirical evidence of high levels of unemployment persistence in european countries

the rise in unemployment a multi country study one of the most remarkable features of recent economic history has been the remorseless rise in unemployment throughout the industrialized countries however while the trend to higher unemployment is universal the experience of individual countries also differs widely the increase is especially marked within the european community where unemployment rates rival those reached in the interwar years by contrast in the scandinavian countries and japan unemployment is lower and has risen very much less experience in the united states lies somewhere between these extremes and in the last few years unemployment there has fallen sharply

can productivity growth explain the nairu long run evidence from britain 1871 1999 this paper investigates the effect of productivity growth on the non accelerating inflation rate of unemployment nairu over the long run using historically consistent time series for the uk from 1871 to 1999 a two equation model of unemployment and wage setting that incorporates productivity effects is estimated over the whole period allowing for shifts associated with changes in labour market institutions the results indicate that faster productivity growth reduces the nairu but that this goes only part of the way towards explaining wide swings in average unemployment across the decades

capital accumulation and unemployment a tale of two continents in contrast to much recent work regarding the causes of european unemployment in this paper we emphasize the importance of capital accumulation but unlike the few previous studies which have examined the relationship between capital accumulation and unemployment we argue that what matters for the evolution of employment and the unemployment rate is not the absolute growth rate of a country s capital stock but its evolution relative to other countries capital stock the empirical validity of the above statement is demonstrated for almost all oecd countries using quarterly time series data for the period 1961 1995 more detailed evidence is also presented for germany japan and the united kingdom

hysteresis in unemployment fact or fiction abstract a stylized fact of european unemployment dynamics is one of extreme persistence and possible unit root behavior this has led to a major reconsideration of the natural rate paradigm we apply the kalman filter to estimate the natural rate of unemployment for germany and france when the moving natural rate model is tested against the alternative of a unit root process the unit root hypothesis is resoundingly rejected

conjoint analysis of price premiums for hotel amenities over the past decade or so conjoint analysis green and rao 1971 johnson 1974 appears to have become one of industry s most widely applied marketing research techniques for estimating consumer s multi attribute utility functions cattin and wittink 1982 however a continuing problem in application of conjoint analysis is how to handle the price attribute in the construction of stimulus profiles for presentation to respondents in many cases of practical interest the price level will be highly correlated with other product attribute levels if the researcher ignores this correlation by allowing the price levels to vary independently of other attributes the resulting profiles may appear sufficiently unrealistic to result in respondents discounting each profile s attractiveness thus reducing the validity of the results a related problem which adds to the complexity of new product pricing research is the bundling issue in the context of conjoint analysis the question is whether one can predict a respondent s evaluation of a bundle of product attributes and price as a simple linear function of the summed part worths of the entities making up the bundle when each entity is presented with its actual price metric hybrid conjoint models have received a fair amount of industry application to date the purpose of these models is to reduce data collection time while still retaining individual differences in part worth functions the present paper extends this class of models to include categorical conjoint analysis in which the criterion variable is classificatory this model is applied to an extremely large conjoint problem involving over 40 attributes and over 100 attribute levels the study results support the viability of the model for dealing with extremely large conjoint problems the study also shows evidence of the inability of simple functions of self explicated utilities for components of a bundle of hotel amenities to predict respondents preferences for the total bundle journal of business 1984 vol 57 no 1 pt 2 1984 by the university of chicago all rights reserved 0021 9398 84 5712 0019 0 1 50

the relationships between permanent and transitory movements in u s output and the unemployment rate this paper estimates the permanent and transitory movements in u s output and the unemployment rate and the relationships between them the results suggest that permanent movements in u s output and the unemployment rate are important for explaining overall fluctuations further the correlation between changes in these series arises in large part due to the relationship between their permanent components

trends and random walks in macroeconomic time series a re examination in their 1982 article c r nelson and c i plosser provided evidence supporting the existence of an autoregressive unit root in a variety of macroeconomic time series the author reexamines their evidence using small sample distributions for various unit root test statistics these distributions are calculated from specific null and alternative models including median unbiased models that correct for ols coefficient bias estimated from the data contrary to earlier assertions the null and alternative models of many macroeconomic series provide very different characterizations of persistence but cannot be distinguished with unit root tests copyright 1992 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

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

optimal unemployment insurance with monitoring and sanctions this article analyses the design of optimal unemployment insurance in a search equilibrium framework where search effort among the unemployed is not perfectly observable we examine to what extent the optimal policy involves monitoring of search effort and benefit sanctions if observed search is deemed insufficient we find that introducing monitoring and sanctions represents a welfare improvement for reasonable estimates of monitoring costs this conclusion holds both relative to a system featuring indefinite payments of benefits and a system with a time limit on unemployment benefit receipt

trade capital accumulation and structural unemployment an empirical study of the singapore economy the past three and a half decades witnessed a distinctly declining trend in singapore s unemployment rate which dropped from an average annual rate of 7 85 percent in 1966 70 to 2 74 percent in 1991 2000 the authors seek to identify and empirically examine the factors that have influenced singapore s unemployment rate in an environment of low and stable inflation they incorporate a union bargaining framework into a standard factors trade model in which an increase in the relative price or capital stock in the export sector raises the demand wage that firms can afford to pay relative to workers fall back income and consequently lowers equilibrium unemployment the magnitude of the effects depends on the fall back income the weight unions attach to employment and the elasticity of labor demand which the authors estimate using data on singapore the results show that labor unions in singapore care more about employment than wages together with a small fall back income and elastic labor demand the authors show that given the same percentage change in relative export prices and capital accumulation in the export sector the effect on unemployment is larger for the former however the empirical importance of capital accumulation in the export sector dominates increases in relative export prices in reducing unemployment since the manufacturing sector experienced a tremendous increase in capital inputs throughout the sample period whereas the relative price of exports experienced a far smaller increase and only in the early part of the sample period the authors conclude that through a very open trading regime the tremendous increase in capital stock of the exporting sector has been the main reason behind singapore s declining unemployment rate

phillips curves and unemployment dynamics a critique and a holistic perspective the conventional wisdom that inflation and unemployment are unrelated in the long run implies that these phenomena can be analysed by separate branches of economics the macro literature tries to explain inflation dynamics and estimates the nairu the labour macro literature tries to explain unemployment dynamics and determine the real economic factors that drive the natural rate of unemployment we show that the orthodox view that the new keynesian phillips curve is vertical in the long run and that it cannot generate substantial inflation persistence relies on the implausible assumption of a zero interest rate in the light of these results we argue that a holistic framework is needed to jointly explain the evolution of inflation and unemployment

unilateral divorce versus child custody and child support in the u s this paper explores the response of the divorce rate to law reforms introducing unilateral divorce after controlling for law reforms concerning the aftermath of divorce which are omitted from most previous studies we introduce two main policy changes that have swept the us since the late 1970s the approval of the joint custody regime and the child support enforcement program because those reforms affect divorce decisions by counteracting the reallocation of property rights generated by the unilateral divorce procedure and by increasing the expected financial costs of divorce it is arguable that their omissions might obscure the impact of unilateral divorce reforms on divorce rates after allowing for changes in laws concerning the aftermath of divorce we find that the positive impact of unilateral divorce reforms on divorce rates does not vanish over time suggesting that the coase theorem may not apply to changes in divorce laws supplemental analysis developed to examine the frequency of permanent shocks in us divorce rates indicates that the positive permanent changes in divorce rates can be associated with the implementation of unilateral divorce reforms and that the negative permanent changes can be related to the law reforms concerning living arrangements in the aftermath of divorce this seems to confirm the important role of these policies in the evolution of divorce rates

comment on conjoint analysis of price premiums for hotel amenities firms are often faced with the problem of designing and pricing new products in durables such as houses cars and personal computers and also in services such as hotel accommodations there is a basic unit that the firm can offer at a base price in addition the firm can offer and the consumer may choose optional add ons at a premium the types of decisions to be made by a firm in this context are

bayesian evidence on the structure of unemployment issn 1328 4991 print issn 1447 5863 online isbn 0734031157 melbourne institute working paper no 3 03

towards circular economy implementation a comprehensive review in context of manufacturing industry the concept of circular economy ce is to an increasing extent treated as a solution to series of challenges such as waste generation resource scarcity and sustaining economic benefits however the concept of circularity is not of novel as such specific circumstances and motivations have stimulated ideas relevant to circularity in the past through activities such as reuse remanufacturing or recycling main objectives of this work are to provide a comprehensive review of research efforts encompassing aspects of resources scarcity waste generation and economic advantages to explore the ce landscape in the context of these three aspects especially when they are considered simultaneously based on an idea of a comprehensive ce framework propose an implementation strategy using top down and bottom up approach in a concurrent manner to fulfill this objective a comprehensive review of state of the art research is carried out to understand different ideas relevant to ce motivation for the research and context of their recurrence main contributions of this paper are a comprehensive ce framework and a practical implementation strategy for a regenerative economy and natural environment the framework emphasizes on a combined view of three main aspects i e environment resources and economic benefits it also underlines that joint support of all stakeholders is necessary in order to successfully implement the ce concept at large scale the proposed framework and implementation strategy also identify new avenues for future research and practice in the field of ce

the nairu unemployment and monetary policy this paper examines the precision of conventional estimates of the nairu and the role of the nairu and unemployment in forecasting inflation the authors find that although there is a clear empirical phillips relation the nairu is imprecisely estimated forecasts of inflation are insensitive to the nairu and there are other leading indicators of inflation that are at least as good as unemployment this suggests deemphasizing the nairu in public discourse about monetary policy and instead drawing on a richer variety of leading indicators of inflation