estimating asset correlations from stock prices or default rates which method is superior this paper sets out to help explain why estimates of asset correlations based on equity prices tend to be considerably higher than estimates based on default rates resolving this empirical puzzle is highly important because firstly asset correlations are a key driver of credit risk and secondly both data sources are widely used to calibrate risk models of financial institutions by means of a simulation study we explore the hypothesis that differences in the correlation estimates are due to a substantial downward bias characteristic of estimates based on default rates by varying the time horizon the default probability the asset correlation and the number of firms in the portfolio we investigate these estimators in a systematic comparative study our results suggest that correlation estimates from equity returns are more efficient than those from default rates this finding still holds if the model is misspecified such that asset correlations follow a vasicek process which affects foremost the estimates from equity returns the results lend support for the hypothesis that the downward bias of default rate based estimates is an important although not the only factor to explain the differences in correlation estimates furthermore our results help to quantify the estimation error of asset correlations dependent on the true values of default probability and asset correlation

real exchange rates under the recent float unequivocal evidence of mean reversion standard multivariate tests of long run ppp may reject nonstationarity when a single real exchange rate series is stationary we apply a test where the null hypothesis is violated only when all series are stationary and reject nonstationarity for real dollar rates

mitigating the pro cyclicality of basel ii policy discussions on the recent financial crisis feature widespread calls to address the pro cyclical effects of regulation the main concern is that the new risk sensitive bank capital regulation basel ii may amplify business cycle fluctuations this paper compares the leading alternative procedures that have been proposed to mitigate this problem we estimate a model of the probabilities of default pds of spanish firms during the period 1987 2008 and use the estimated pds to compute the corresponding series of basel ii capital requirements per unit of loans these requirements move significantly along the business cycle ranging from 7 6 in 2006 to 11 9 in 1993 the comparison of the different procedures is based on the criterion of minimizing the root mean square deviations of each adjusted series with respect to the hodrick prescott trend of the original series the results show that the best procedures are either to smooth the input of the basel ii formula by using through the cycle pds or to smooth the output with a multiplier based on gdp growth our discussion concludes that the latter is better in terms of simplicity transparency and consistency with banks risk pricing and risk management systems for the portfolio of spanish commercial and industrial loans and a 45 loss given default lgd the multiplier would amount to a 6 5 surcharge for each standard deviation in gdp growth the surcharge would be significantly higher with cyclically varying lgds rafael repullo jesus saurina and carlos trucharte

limited liability moral hazard and share tenancy abstract this paper contributes to the literature on share tenancy by reexamining a framework developed in basu 1992 it is shown that limited liability and moral hazard in effort provides a richer theory of share contracts when the tenant also has discretion in the choice of projects

marginal rate of transformation and rate of substitution measured by dea environmental assessment comparison among european and north american nations this study discusses the new use of dea data envelopment analysis environmental assessment to measure mrt marginal rate of transformation and rs rate of substitution among production factors e g inputs desirable and undesirable outputs to measure the degree on mrt and rs this study first examines a concept of disposability from the perspective of economic strategies to combat various environmental issues the strategies are extendable to a policy change for pollution prevention the underlying concept is separated into natural and managerial disposability under managerial disposability it is possible for us to measure an occurrence of desirable congestion or eco technology innovation considering the disposability concept this study discusses how to measure the type and magnitude of mrt and rs a problem of the mrt rs measurement is that these measures usually become unstable e g very large or small in these magnitudes because dea does not assume any functional form for economic activities to overcome such a difficulty this study equips dea environmental assessment with multiplier restriction by utilizing a unique feature on a proposed data treatment the multiplier restriction in dea has been never explored in previous works on environmental assessment in an application this study finds three important economic concerns on europe and north america first western europe outperforms eastern europe and north america in their unified efficiency measures under managerial disposability this study statistically confirms a difference between western and eastern europe but not between western europe and north america this result exhibits that eastern europe is not yet well developed at the level of the other two regions second eastern europe has exhibited mrt estimates that are different from western europe and north america the nations in eastern europe have an economic potential for industrial developments because the level of their industrial pollutions is less than that of the other two regions the potential is also found in their mrt estimates finally an interesting difference can be found in the rs estimate between eastern europe and western europe from 2008 to 2012 they have statistically exhibited a difference between the two regimes but not with north america this is because most nations in both western europe and north america have already attained a high level of economic successes so that they have a limited industrial potential under current production technology and eco technology the situation of the two regions will be changed along with new technology development in contrast eastern europe is different from the other two regions in terms of attaining such a level of social sustainability because of limited capital accumulation and limited opportunity for technology innovation

efficiency analysis of chinese industry a directional distance function approach two efficiency measures of chinese industry were estimated at the provincial level from 1994 to 2002 using a directional output distance function one is a traditional efficiency measure that considers only desirable output while the other considers both desirable and undesirable outputs simultaneously a comparison of the two measures revealed that efficiency levels are biased only if desirable output is considered five coastal provinces municipalities that have attracted a large amount of foreign direct investment are found to be the most efficient when only desirable output is considered and also when both desirable and undesirable outputs are considered however omitting undesirable output tends to lead to an overestimate of industrial efficiency levels in shandong sichuan and hebei provinces we also found that a province s industrial structure has significant effects on its efficiency levels

the economic theory of agrarian institutions introduction alternative approaches to the theory of institutions in economic development pranab bardhan rational peasants efficient institutions and a theory of rural organization methodological remarks for development economics joseph e stiglitz part 1 land and labour theories of sharecropping nirvikar singh a comparison of principal agent and bargaining solutions the case of tenancy contracts clive bell contracts with eviction in infinitely repeated principal agent relationships bhaskar dutta et al production relations in semi arid african agriculture hans binswanger et al part 2 credit and interlinked transactions rural credit markets the structure of interest rates exploitation and efficiency kaushik basu credit and agrarian class structure mukesh eswaran and ashok kotwal credit rationing tenancy productivity and the dynamics of inequality avishay braverman and joseph e stiglitz on choice among creditors and bonded labour contracts t n srinivasan some aspects of linked product and credit market contracts among risk neutral agents clive bell and t n srinivasan a note on interlinked rural economic arrangements pranab bardhan interlinkages and the pattern of competition debraj ray and kunal sengupta part 3 marketing and insurance agricultural institutions for insurance and stabilization david m newbery peasants risk aversion and the choice of marketing intermediaries and contracts a bargaining theory of equilibrium marketing contracts pinhas zusman part 4 co operatives technology and the state agricultural producer co operatives louis putterman institutional analysis of credit co operatives avishay braverman and j luis guasch agrarian structure technological innovations and the state alain de janvry et al

how great are the great ratios the balanced growth and neoclassical stochastic growth literatures imply stationarity of certain macroeconomic great ratios four such ratios are considered consumption output investment output the real interest rate and real money supply growth and evidence for ratio stationarity in the g7 countries is examined univariate unit root and stationarity tests are performed and analysis of the cointegrating relations between output consumption and investment is conducted almost no evidence of stationarity is found for the consumption output and investment output great ratios empirical evidence supports real money supply growth stationarity but is more mixed for the real interest rate

a theory of sharecropping the role of price behavior and imperfect competition this paper proposes a theory of sharecropping on the basis of price behavior in agriculture and imperfectly competitive nature of rural product markets we consider a contractual setting between one landlord and one tenant with seasonal variation of price where the tenant receives a low price for his output while the landlord can sell his output at a higher price by incurring a cost of storage we consider two different classes of contracts i tenancy contracts and ii crop buying contracts it is shown that sharecropping is the optimal form within tenancy contracts and it also dominates crop buying contracts provided the price variation is not too large then we consider interlinked contracts that have both tenancy and crop buying elements and show that there are multiple optimal interlinked contracts finally proposing an equilibrium refinement that incorporates imperfect competition in the rural product market it is shown that the unique contract that is robust to this refinement results in sharecropping

european energy policy a review this article presents the implemented policies of the european union in the broader field of energy and provides a picture of the union s strategy on energy related issues a brief historical background is provided covering the period from the beginning of the union s creation in 1951 when coal was considered as the heart of its economic growth up to 2012 policy development principles as well as the consultations that take place before the proposal of each option are also discussed implemented policies are classified into seven broad categories renewable energy energy efficiency and savings internal energy markets security of energy supply environmental protection nuclear energy and research and development for each category an introduction covering important milestones towards its development is followed by the presentation of the relevant policies and a description of their purpose

dea like models for efficiency evaluations of specialized and interdependent units abstract the problem of evaluating the efficiency of a set of specialized and interdependent decision making subunits dmsus that make up a larger decision making unit dmu is considered the dmsus are interdependent in the sense that part of the output produced by each of them may be used as an input by the other ones they are also specialized hence non homogeneous as they may have not the same inputs and outputs for this problem some efficiency indexes are introduced and they are shown to satisfy some basic properties

an analysis of chinese provincial carbon dioxide emission efficiencies based on energy consumption structure abstract china plans to reduce carbon dioxide emissions from 2005 levels by 40 45 by 2020 and by 60 65 by 2030 this research project addresses this challenge by analyzing chinese provincial carbon dioxide emission efficiencies and the energy consumption structure the study applies the slacks based measure sbm model to analyze the data from 30 regions in china from 2000 to 2011 the situation of provincial carbon dioxide emission efficiency the characteristics of the energy consumption structure in each province and the differences among these provinces are quantitatively analyzed based on the k means cluster analysis this research suggests that china be divided into five groups in the energy consumption structure the inefficient and less reasonable group the inefficient and more reasonable group the efficient and less reasonable group the efficient and more reasonable group and the efficient and most reasonable group the study offers recommendations for the government to develop policies to effectively and efficiently reduce carbon dioxide emission levels for each group it also has profound implications for government administration in developing countries to guide the energy consumption and to control environmental pollution for the healthy development of the economy

limited liability and the existence of share tenancy abstract the paper considers the problem confronting an absentee landlord who can lease out his land on a fixed rent contract share rent contract or a mixture of the two it is argued that in poor areas it is natural to have each contract underwritten by an implicit limited liability clause which allows a person to forego paying rent under extreme crop failures in the presence of such an implicit clause a certain tension appears between a tenant and a landlord with the former preferring risky projects and the latter preferring safe ones it is shown that in such a case share tenancy turns out to be the dominant system from among the class mentioned above because it minimises the tension between the landlord and the tenant the result is then used to discuss conditions under which share tenancy will tend to wither away

importance sampling for portfolio credit risk monte carlo simulation is widely used to measure the credit risk in portfolios of loans corporate bonds and other instruments subject to possible default the accurate measurement of credit risk is often a rare event simulation problem because default probabilities are low for highly rated obligors and because risk management is particularly concerned with rare but significant losses resulting from a large number of defaults this makes importance sampling is potentially attractive but the application of is is complicated by the mechanisms used to model dependence between obligors and capturing this dependence is essential to a portfolio view of credit risk this paper provides an is procedure for the widely used normal copula model of portfolio credit risk the procedure has two parts one applies is conditional on a set of common factors affecting multiple obligors the other applies is to the factors themselves the relative importance of the two parts of the procedure is determined by the strength of the dependence between obligors we provide both theoretical and numerical support for the method

per capita carbon dioxide emissions convergence or divergence understanding and considering the distribution of per capita carbon dioxide co2 emissions is important in designing international climate change proposals and incentives for participation i evaluate historic international emissions distributions and forecast future distributions to assess whether per capita emissions have been converging or will converge i find evidence of convergence among 23 member countries of the organisation for economic co operation and development oecd whereas emissions appear to be diverging for an 88 country global sample over 1960 2000 forecasts based on a markov chain transition matrix provide little evidence of future emissions convergence and indicate that emissions may diverge in the near term i also review the shortcomings of environmental kuznets curve regressions and structural models in characterizing future emissions distributions

environmentally sensitive productivity growth a global analysis using malmquist luenberger index abstract we examine conventional and environmentally sensitive total factor productivity tfp in 41 developed and developing countries over the period of 1971 to 1992 due to the non availability of reliable input and co 2 emissions price data the study uses directional distance function to derive malmquist luenberger ml productivity index the index allows us to decompose the tfp into measures of technical and efficiency changes dea is used to compute the directional distance functions we find that tfp index value is not different when we account for the co 2 emissions relative to the situation when they are freely disposable but for the components of tfp change technical and efficiency changes the null hypothesis of whether the indexes are the same under two different scenarios cannot be accepted issues of catch up and convergence or in some cases possible divergence in productivity are examined within a global framework the paper also studies the impact of openness on conventional and environmentally sensitive measures of productivity

heterogeneous technologies strategic groups and environmental efficiency technology gaps for european countries abstract this paper measures technology tg and environmental efficiency technology gaps eetgs in 25 european countries over two distinct periods 2002 and 2008 examining the possible effect of adopted environmental regulations and the kyoto protocol commitments on environmental efficiency technology gaps however the introduction of the metafrontier in our analysis puts into our discussion the role of heterogeneous technologies and its effect on the above mentioned measures employing a directional distance function we investigate whether there is an actual difference in terms of environmental efficiency and efficiency performance among european countries considering the technological frontiers under which they operate the construction of individual frontiers has been realized employing a large number of variables that are highly correlated with countries learning and absorbing capacity new technological knowledge and using economic theory and classical frontier discrimination like developed vs developing north vs south and participation in the eurozone or not the overall results indicate a crucial role of heterogeneous technologies for technology gaps in both periods moreover a significant decrease for both measures although in different percent has been recorded emphasizing the key role of knowledge spillovers

the logic of appropriability from schumpeter to arrow to teece this note expounds the abstract fundamentals of the appropriability problem re assessing insights from three classic contributions those of schumpeter arrow and teece whereas the first two contributions were explicitly concerned with the implications of appropriability for society at large teece s main concern was with practical questions of business strategy and economic organization this note argues that his practical concerns notwithstanding teece contributed en passant but fundamentally to the clarification of basic questions that previous authors had addressed less comprehensively and less satisfactorily specifically his analysis of the innovator s access to complementary assets undertaken from a contracting perspective can be seen as filling a significant gap in the previous theoretical discussion of appropriability 2006 published by elsevier b v

multilateral productivity comparisons when some outputs are undesirable a nonparametric approach multilateral productivity comparisons of firms producing multiple outputs some of which are undesirable are obtained by making two modifications to the standard farrell approach to efficiency measurement the restriction that production technology satisfy strong disposability of outputs is relaxed to allow for the fact that undesirable outputs may be freely disposable and the efficiency measures are modified to allow for an asymmetric treatment of desirable and undesirable outputs performance measures that satisfy these requirements are calculated as solutions to programming problems the methodology is applied to a sample of mills producing paper and pollutants

radial and non radial decompositions of luenberger productivity indicator with an illustrative application abstract viewing slacks as one possible source of inefficiency and that inputs have differential importance in the production process this paper develops based on the directional russell measure of inefficiency the non radial luenberger indicator this indicator is then shown as the sum of the individual input specific luenberger indicators the luenberger indicator and its various input specific indicators are also then shown as the composite measure of efficiency change and technical change this decomposition enables the researcher to empirically examine the contributions of each factor input towards the productivity change and its components efficiency change and technical change our proposed decomposition scheme is then empirically illustrated to analyze the eco productivity performance behavior of the 22 oecd countries during the period 1995 2004 our results indicate that first the productivity change estimates yielded from the non radial luenberger indicator are different from those yielded from its radial counterpart when slacks are present second most of these countries are found experiencing productivity growth due to technical progress alone and finally as regards the order of input specific contributions towards productivity growth capital contributes the most followed by savings in emissions and labor respectively

evaluating environmental performance using data envelopment analysis the case of european countries abstract environmental efficiency is considered to be a critical pillar of sustainable development consequently improving environmental performance has aroused attention at both the local and global level this study evaluated the environmental performance of european union eu countries using the data envelopment analysis dea approach and the global malmquist luenberger index although literature using the dea approach to measure environmental performance exists this study s main contribution was considering different types of undesirable outputs and using long term panel data on eu countries in particular the dea window analysis technique was applied to evaluate the environmental performance of 27 eu countries in cross sectional and time varying data during the period 2000 2017 three dea models were examined labor capital and energy were used as common inputs with a combination of different outputs including gross domestic product carbon dioxide and particulate matter emissions and waste the empirical results revealed that the trends in the environmental performance of the entire eu and its individual countries were similar under all examined models environmental performance was indeed negatively affected by the financial crisis of 2007 2008 this impact was mainly observed in eastern eu countries furthermore both economic and environmental variables significantly influenced countries overall efficiency the analysis using the global malmquist luenberger index elucidated that overall eu countries experienced the efficiency improvement during the study period although fluctuations were observed these results enable countries and policymakers to understand their environmental performance identify strengths and weaknesses and set targets for further improvement based on the current best practices of comparable peers

eco efficiency and convergence in oecd countries this paper assesses the convergence in eco efficiency of a group of 22 oecd countries over the period 1980 2008 in doing so three air pollutants representing the impact on the environment of economic activities are considered namely carbon dioxide text co 2 nitrogen oxides text no mathrm x and sulphur oxides text so mathrm x furthermore eco efficiency scores at both country and air pollutant specific level are computed using data envelopment analysis techniques then convergence is evaluated using the recent approach by phillips and sul econometrica 75 1771 1855 2007 which tests for the existence of convergence groups first we find that eco efficiency has improved over the period with the exception of text no mathrm x emissions second switzerland is the most eco efficient country followed by some scandinavian economies such as sweden iceland norway and denmark in contrast southern european countries such as portugal spain and greece in addition to hungary turkey canada and the united states are among the worst performers finally we find that both the most eco efficient countries and the worst tend to form clubs of convergence

methodological comparison among radial non radial and intermediate approaches for dea environmental assessment abstract this study compares three dea approaches for environmental assessment all of which are designed to examine the level of simultaneous achievement on economic prosperity and environmental protection so measuring the degree of sustainability development dea standing for data envelopment analysis has been widely applied for performance assessment in the past five decades a new type of applications is referred to as dea environmental assessment and it measures the performance of many organizations that utilize inputs to produce not only desirable outputs e g electricity but also undesirable outputs e g co 2 in the previous studies dea based performance evaluation for environment assessment is methodologically classified into radial or non radial category recently a new intermediate approach analytically locating between the radial and non radial measures has been proposed as the third alternative a use of the intermediate approach has several unique features all of which cannot be found in the radial and non radial ones the new approach measures the degree of unified inefficiency on each production factor and determines the level of total unified inefficiency from the average of the sum of these inefficiency scores this study discusses the analytical features by comparing the intermediate approach with the radial and non radial ones the methodological comparison attempts to convey a message that dea is indeed an important methodology but not perfect rather it is an approximation approach to examine the performance of various organizations many dea applications on energy and environment often suffer from a methodological bias implying that different approaches produce different empirical results thus in guiding a large policy issue such as the global warming and climate change it is necessary for us to compare several different approaches e g models and concepts to derive a reliable empirical suggestion the importance of such a message is applicable to not only dea but also the other types of empirical research in natural and social sciences therefore this study discusses the methodological bias issue from the practicality of the three dea approaches in assessing various concerns on energy and environment

an analysis of spain s global and environmental efficiency from a european union perspective abstract sustainable economic growth from the environmental point of view is one of the commitments of the eu 28 different measures have been implemented to deal with this issue this work analyses spain s natural efficiency and management efficiency in their static and dynamic sense for the years 2005 2012 in comparison eu 28 the analysis has been carried out using the malmquist index and natural and managerial efficiency three variables have been considered as inputs work gross fixed capital formation and final energy consumption two variables are the outputs the gdp as a desirable output and greenhouse effect gas emissions as an undesirable output the result is that spain s managerial efficiency and natural efficiency are though their values are lower evolving in a similar manner to those of the countries which have been at the heart of the eu longer these levels of efficiency are higher than those of the block of countries which have joined the eu 28 more recently the natural malmquist index results indicate that these are the countries which have had a greater growth in productivity above spain s and the average of the more veteran countries

decomposition of the environmental inefficiency of the meta frontier with undesirable output abstract in this paper we present an alternative analysis framework to evaluate the effects of technology heterogeneities and undesirable output on environmental efficiency measurement the proposed framework combines the directional distance function and a meta frontier analysis it can be used to measure efficiency improvements brought about by enhanced technical management and technological advances for demonstration purposes we used the framework to measure the environmental efficiency in 90 countries worldwide for the 2003 2007 period the results showed that when the meta technology set is used as the evaluation basis the average environmental efficiency of high competitiveness countries is greater than that of lower middle low and upper middle competitiveness countries the upper middle competitiveness countries perform worse than the lower middle and low competitiveness countries because of the excessive labor force usage and carbon dioxide emissions in these countries we also found that the environmental inefficiency of the meta frontier for high competitiveness countries can be attributed to managerial failure in the production process whereas that for upper middle lower middle and low competitiveness countries can be attributed to technological differences

technological innovations capital mobility and the product cycle innorth south trade this paper constructs a general equilibrium model of north south tradein which the north continually introduces new goods the rate at whichtechnology diffuses to the south is a function of differences in the cost of production in the two regions the key result of the model is that labor force growth in the south initially increases real wages inthe north a standard result in classical trade models but in the long run reduces northern wages by accelerating the transfer of technology and drawing capital out of the north as well copyright 1986 by american economic association

challenges for r d and innovation in energy abstract in recent years there has been a growing interest in the role of r d and innovation in energy efficiency and dealing with climate change to improve our knowledge in these matters a workshop was organized in barcelona spain in january 2014 this introduction to the special issue first presents some insights from the literature on challenges for r d and innovation in energy the second section summarises the articles from this workshop that make up this special issue and that provide new insights into innovation in energy all the articles include energy policy recommendations based on the empirical analyses carried out

does sharecropping affect long term investment evidence from west bengal s tenancy reforms in india land reform has been high on the political agenda since independence in 1947 and early efforts at abolishing intermediaries are widely credited with having brought about significant social benefits the most prominent type is tenancy reform as it does not extinguish landlords ownership rights tenants who may have benefited from rent ceilings and cannot be evicted still have to pay annual share rent this weakness of rights may fail to create the incentives for effort supply and long term investment that have underpinned the success of land reforms elsewhere effectively adding a dynamic inefficiency to the disincentives created by the marshallian inefficiency of sharecropping this could imply that despite the high political price of implementing land reform in india the schemes so far have failed to reach their productivity and poverty reduction potential

are co2 emission levels converging among industrial countries time paths of carbon dioxide emissions intwenty one industrial countries are examinedfrom 1960 1997 to test for stochastic andconditional convergence both panel unit roottests and cross section regressions areperformed overall we find significantevidence that co2 emissions haveconverged

is the environmental performance of industrialized countries converging a sure approach to testing for convergence abstract in this paper we test for convergence in the environmental performance of a sample of oecd countries with data ranging from 1971 to 2002 first we use data envelopment analysis dea to compute two environmental performance indicators epis in the production theory framework second we propose the use of a sequential multivariate approach to test for convergence in environmental performance these tests allow us to reconcile the time series literature with the cross sectional dimension which is basic when testing for convergence in regional blocs the sure technique is used which allows for the existence of correlations across the series without imposing a common speed of mean reversion the empirical results show that the group of countries as a whole as well as the majority of countries considered on an individual basis results for some countries vary between epis are catching up with switzerland the benchmark country

pricing the risk of recovery in default with absolute priority rule violation abstract this paper proposes a simple approach to infer the risk neutral density of recovery rates implied by the prices of the debt securities of a firm the proposed approach is independent of modeling default arrival rates and allows for the violation of absolute priority rule the paper demonstrates that a new statistic the adjusted relative spread captures risk neutral recovery information in debt prices interest rates and firm tangible assets are shown to be significant determinants of the price of recovery an application illustrates the pricing of credit derivatives written on the realized recovery rate

importance sampling for integrated market and credit portfolio models a sophisticated approach for computing the total economic capital needed for various stochastically dependent risk types is the bottom up approach in this approach usually market and credit risks of financial instruments are modeled simultaneously as integrating market risk factors into standard credit portfolio models increases the computational burden of calculating risk measures it is analyzed to which extent importance sampling techniques previously developed either for pure market portfolio models or for pure credit portfolio models can be successfully applied to integrated market and credit portfolio models specific problems which arise in this context are discussed the effectiveness of these techniques is tested by numerical experiments for linear and non linear portfolios

credit risk in private debt portfolios default loss severity and average loss rates for a large sample of privately placed bonds are presented and compared with loss experience for publicly issued bonds the chance of very large portfolio losses is estimated and some determinants of such losses are analyzed results show ex ante riskier classes of private debt perform better on average than public debt both diversification and the riskiness of individual portfolio assets influence the bad tail of the portfolio loss distribution private placements are similar to corporate loans in that both are monitored private debt the results are thus relevant to management and securitization of private debt portfolios generally more than half of nonfinancial corporate debt finance is iss ued privately and decisions of the financial intermediaries that invest in such debt depend importantly on its credit risk regulators of such institutions are similarly attentive to portfolio credit risk and it is an important consideration in the design of securitizations of pools of private debt in spite of its importance little is known empirically about private debt credit risk especially ex ante risk as a function of portfolio characteristics many studies have examined the loan portfolio performance of banks thrifts and insurance companies but the ex ante risk characteristics of the portfo

efficient share tenancy contracts under risk the case of two rice growing villages in thailand abstract two categories of thai sharecroppers are observed to be efficient those under high poverty and high risk and those in a long term relation of gift exchange with their landlord econometric estimates show that use of variable factors by these sharecroppers is insignificantly different from that by owner operators and significantly higher than that by generic sharecroppers interpretations for this behavior are provided by models of sharecropping under safety first and of repeated contracts with gift exchange

estimating the distribution of total default losses on the spanish financial system abstract this paper quantifies the credit risk loss distribution of the spanish financial system by introducing a general monte carlo importance sampling is approach we start obtaining all the required information for the standard credit risk model then we quantify the loss distribution under the standard is method and allocate the total risk over the different institutions in the spanish financial system we extend the current is framework to deal with more general assumptions like random recoveries and market valuation we also study the variability of the risk measures over the business cycle and the possible variability due to the model parameters uncertainty our results show that this approach can be very useful for banking supervisors from a macroprudential point of view and that the risk allocation can vary considerably depending on the valuation model under analysis

limited liability wealth differences and tenancy contracts in agrarian economies abstract an explanation is provided for two observations concerning variations in the choice of tenants and their welfare differences in tenants wealth imply corresponding differences in liability when default is possible on fixed rental commitments in this context the inability of landlords to specify their tenants effort lead to effort choices that vary with the type of contract offered the selection of tenants and the contract terms they receive thus depend on wealth with wealthier tenants being preferred and receiving fixed rent contracts these results also predict that wealthier tenants earn higher profits on their leased plots

limited liability contractual choice and the tenancy ladder abstract we re examine the connection between limited liability contractual form and the agricultural tenancy ladder in a model with only labor moral hazard we show that ex post limited liability does not explain sharecropping in this model but that ex ante limited liability can do so we characterize the nature of the tenancy ladder in either case

distribution dynamics of co2 emissions this paper uses nonparametric methods to examine the convergence in co2 emissions per capita on a sample of 100 countries for the period 1966 1996 industrial countries show a convergence pattern however there is little evidence of convergence for the whole sample

a tale of two market failures technology and environmental policy abstract market failures associated with environmental pollution interact with market failures associated with the innovation and diffusion of new technologies these combined market failures provide a strong rationale for a portfolio of public policies that foster emissions reduction as well as the development and adoption of environmentally beneficial technology both theory and empirical evidence suggest that the rate and direction of technological advance is influenced by market and regulatory incentives and can be cost effectively harnessed through the use of economic incentive based policy in the presence of weak or nonexistent environmental policies investments in the development and diffusion of new environmentally beneficial technologies are very likely to be less than would be socially desirable positive knowledge and adoption spillovers and information problems can further weaken innovation incentives while environmental technology policy is fraught with difficulties a long term view suggests a strategy of experimenting with policy approaches and systematically evaluating their success

productivity growth technical progress and efficiency change in industrialized countries this paper analyzes productivity growth in 17 oecd countries over the period 1979 1988 a nonparametric programming method activity analysis is used to compute malmquist productivity indexes these are decomposed into two component measures namely technical change and efficiency change we find that u s productivity growth is slightly higher than average all of which is due to technical change japan s productivity growth is the highest in the sample with almost half due to efficiency change jel c43 d24 in this paper we apply recently developed

a cross country evaluation of environmental performance is there a convergence divergence pattern in technology gaps abstract a balanced panel of 103 countries for the period 1995 2011 is introduced into a metafrontier framework to gain insight into the idiosyncratic performance of countries in two distinct groups developed annex i countries and developing non annex i countries we measure efficiency using a generalized directional distance function model suitable for dealing with anthropogenic emissions the measurement of efficiency and technology gaps takes into account the group specific heterogeneity moreover we examine the convergence divergence hypothesis for the technology gaps defined for each period our findings reveal significant patterns between the groups and among countries

state contingent rent reduction and tenancy contract choice abstract this study introduces a fixed rent contract with a state contingent rent reduction widely adopted in japan in the early 20th century which a fixed rent was temporary reduced in case of poor harvest the economic implications of this contract are analyzed with a principal agent model it is shown that if the tenant is not too risk averse and or the variability of the yield is not too high then this contract is preferable for the landlord to a fixed rent contract or a share tenancy preliminary tests on the risk sharing implication of a share contract are also provided using the historical data for japan and korea

an activity analysis model of the environmental performance of firms application to fossil fuel fired electric utilities the productivity of firms when some outputs pollution are undesirable has been studied in the literature for some time in this paper we introduce an environmental performance indicator based on the decomposition of overall factor productivity into a pollution index and an input output efficiency index this indicator is compared to the more conventional jaggi and freedman 1992 model results are given for illustrative purposes using data from u s fossil fuel fired electric utilities the rankings of the utilities obtained with the two models show significant divergence which is due to the different ways in which the undesirable outputs are dealt with as well as due to the different possible tradeoffs between the pollutants released into the atmosphere and the resources used as inputs

slacks based efficiency measures for modeling environmental performance we develop two slacks based efficiency measures for modeling environmental performance on the basis of environmental dea technology of the two measures one is a composite index with a higher discriminating power for modeling economic environmental performance and the other can be used to estimate the impacts of environmental regulations we apply the proposed measures to model the co2 emissions of 30 oecd countries from 1998 to 2002 and present the results obtained

testing for convergence in carbon dioxide emissions using a century of panel data this paper tests the convergence in per capita carbon dioxide emissions for a collection of developed and developing countries using data spanning the period 1870 2002 for this purpose three recently developed panel unit root tests that permit for dependence among the individual countries are employed the results lend strong support in favor of convergence for the panel as a whole estimates of the speed of this convergence is also provided

the overvaluation of purchasing power parity abstract recent panel studies of purchasing power parity have reported strong evidence of mean reversion in real exchange rates however these studies fail to control for cross sectional dependence in the data this failure has dramatic consequences raising the significance level of tests with a nominal size of 5 percent to as much as 50 percent it is shown in this paper that controlling for cross sectional dependence no evidence against the random walk null can be found in panels of up to 64 real exchange rates this finding cannot be attributed to low power as there is ample power in panels of this size to reject the unit root null