risk sharing and contagion in networks we investigate the socially optimal design of financial networks that allows to tackle the trade off between risk sharing and contagion we identify conditions on the shock distribution under which full integration or maximal segmentation is optimal we also show that under different conditions the optimal network displays different levels of strength of linkages to other firms or intermediate degrees of segmentation in the latter case the individual and social incentives to establish linkages are not necessarily aligned when firms face heterogeneous distributions of risks they should optimally form linkages only with firms facing risks of the same kind

housing prices and the savings of renters abstract this paper studies the effects of housing prices on the net worth of young households because prospective homeowners must accumulate down payments a change in housing prices can change their savings patterns theoretically the effect of increases in house prices on savings is ambiguous because households can increase their saving to afford the larger down payment or decrease their saving because they have chosen to delay or forego purchasing a house using data from the 1984 panel study of income dynamics 27 i show that empirically the effect of increased housing prices on saving is positive and quite large relative to the savings of young households young renter households living in cities with high housing prices have more net worth than those living in cities with lowering housing prices controlling for both the income of the households as well as the per capita income of the city in which they live

a theory of input output architecture individual producers exhibit enormous heterogeneity in many dimensions this paper develops a theory in which the network structure of production who buys inputs from whom forms endogenously entrepreneurs produce using labor and exactly one intermediate input the key decision is which other entrepreneur s good to use as an input their choices collectively determine the economy s equilibrium input output structure generating large differences in size and shaping both individual and aggregate productivity when the elasticity of output to intermediate inputs in production is high star suppliers emerge endogenously this raises aggregate productivity as in equilibrium more supply chains are routed through higher productivity techniques

a multiobjective approach to vendor selection abstract purchases from vendors involve significant costs for many firms decisions related to these purchases include the selection of vendors and the determination of order quantities to be placed with the selected vendors such decisions are frequently multiobjective in nature that is they are evaluated by more than one criterion at least 23 criteria for various vendor selection problems have been identified in this article we present a multiobjective approach to systematically analyze the inherent tradeoffs involved in multicriteria vendor selection problems the approach is motivated by and demonstrated with an actual purchasing problem facing a division of a fortune 500 company

bequest receipt and family size effects i introduction the seminal economic models of intergenerational human capital investment demonstrate the potential importance of credit market failure in determining child achievement becker and barro 1988 becker and lewis 1973 becker and tomes 1986 willis 1973 1 without the ability to borrow against future child earnings additional children raise the cost of providing a given level of child quality alternatively the greater the level of child quality the higher the cost of having an additional child 2 the resulting negative relationship between family size and child outcomes is termed a quality quantity trade off early empirical studies found large negative family size effects consistent with significant credit market failure kessler 1991 includes a brief survey of this literature however kessler points out that this early literature often ignored the possible effects of birth order because birth order is inherently correlated with family size this omitted variable might account for observed family size effects if first or early born children are advantaged due to preferential parental investments or innate advantages see behrman and taubman 1986 for a discussion of biological psychological and economic reasons for such birth order effects studies that include both family size and birth order controls report conflicting results 3 using data from the national longitudinal survey of youth kessler 1991 finds that neither birth order nor family size affect the level or growth rate of wages he does find a family size effect in the hours worked by women though the direction of the effect depends on age using a sample from norway black devereux and salvanes 2005 find significant family size effects with ordinary least squares even with birth order controls however when family size is instrumented with twinning the effect becomes statistically indistinguishable from zero though the standard errors are large and the results are also consistent with very large family size effects in britain grawe 2008 finds sizable family size effects even after controlling for birth order of course the presence or absence of family size effects in the population as a whole is weak evidence for or against the importance of credit constraints both reason and theory suggest that some families will be free from such hurdles two existing studies have compared family size effects between groups that are more and less likely to be constrained the norwegian study of black devereux and salvanes 2005 divides the sample according to mother s education greater than or equal to 12 or 12 yr their estimates based on instrumental variables using twinning as the instrument do not clearly show greater family size effects among the presumably more constraint prone low mother s education group however the coefficients are imprecisely estimated and so the test has low power grawe 2008 examines the family size effect in britain dividing the sample by father s earnings those with fathers in the top 20 of the income distribution are presumably financially unconstrained yet strong family size effects are found in educational performance among children in these families these articles suggest that financial constraints do not explain family size effects in norway and britain but the experiences in these countries may say little about access to credit markets in the united states in particular both norway and britain provide free access to higher education within the past few years british universities have been allowed to charge as much as 3 000 pounds sterling for tuition but the individuals studied by grawe born in 1958 completed their educations long ago the present article explores the relevance of credit to family size effects in the united states dividing families based on bequest receipt of the children theory suggests that only those unconstrained by credit access would receive a financial bequest

merger policy with merger choice we analyze the optimal policy of an antitrust authority towards horizontal mergers when merger proposals are endogenous and firms choose which of several mutually exclusive mergers to propose in our model the optimal policy of an antitrust authority that seeks to maximize expected consumer surplus imposes a tougher standard on larger mergers i e those involving firms with a larger pre merger market share or equivalently leading to a larger naively computed post merger herfindahl index the optimal policy is a response to a bias in firms proposal incentives firms always propose a larger merger when it is better for consumers than a smaller one but sometimes will propose the larger one even when it is worse for consumers

fuzzy multiobjective linear model for supplier selection in a supply chain abstract within new strategies for purchasing and manufacturing suppliers play a key role in achieving corporate competition hence selecting the right suppliers is a vital component of these strategies in practice vagueness and imprecision of the goals constraints and parameters in this problem make the decision making complicated in spite of the importance of the problem the literature on this subject is relatively scarce in this paper a fuzzy multiobjective linear model is developed to overcome the vagueness of the information for the first time in a fuzzy supplier selection problem an asymmetric fuzzy decision making technique is applied to enable the decision maker to assign different weights to various criteria the model is explained by an illustrative example

fuzzy multi objective approach for optimal selection of suppliers and transportation decisions in an eco efficient closed loop supply chain network abstract establishment of a closed loop supply chain clsc network has attracted immense significance due to government policies and societal demand for environmental consciousness however to enhance the financial and ecological impact of the network the forward and reverse supply chain networks must integrate well so that decisions taken in both areas complement each other in this study we propose an eco efficient clsc design for extending the existing supply chain of an indian firm that assembles inkjet printers the network design is configured as a multi objective model in a multi period setting and is mathematically formulated into a mixed integer programming problem with fuzzy objectives fuzziness provides flexibility to the decision makers because they must accommodate the conflicting nature of the objectives the fuzzy multi objective model incorporates the firm s economic and environmental concerns into the decision making process by selecting environmentally responsible suppliers to procure components based on sustainable criteria choosing appropriate recovery options for end of use eou inkjet printers and planning an efficient transportation network design for reducing the carbon emission of the distribution and collection activities the uniqueness of the proposed fuzzy clsc optimization model lies in providing an integrated decision making framework that can aid the manufacturer in making crucial strategic tactical and operational decisions of optimal selection of suppliers component order allocation recovery flow allocation and vehicle routing planning the novelty of the model also lies in simultaneously minimising the overall cost of the activities undertaken maximizing the performance of the component suppliers and minimising the carbon emissions of the associated transportation activities a weighted fuzzy mathematical programming approach is utilised for generating a fuzzy properly efficient solution as the desired compromised solution for the clsc network problem configuration the relevance of the model is justified using a real data set derived from a case study of the firm based in the northern capital region ncr of india the findings indicate that the proposed integrated clsc network model enables the firm in gaining sustainably from the numerous electronic product reuse opportunities in the indian market further while costly to begin with choosing suppliers with higher sustainable performance and vehicles with lesser emission rate could substantially enhance firm s sustainable image and result in higher profits in the future

a fuzzy approach for supplier evaluation and selection in supply chain management abstract this paper is aimed to present a fuzzy decision making approach to deal with the supplier selection problem in supply chain system during recent years how to determine suitable suppliers in the supply chain has become a key strategic consideration however the nature of these decisions usually is complex and unstructured in general many quantitative and qualitative factors such as quality price and flexibility and delivery performance must be considered to determine suitable suppliers in this paper linguistic values are used to assess the ratings and weights for these factors these linguistic ratings can be expressed in trapezoidal or triangular fuzzy numbers then a hierarchy multiple criteria decision making mcdm model based on fuzzy sets theory is proposed to deal with the supplier selection problems in the supply chain system according to the concept of the topsis a closeness coefficient is defined to determine the ranking order of all suppliers by calculating the distances to the both fuzzy positive ideal solution fpis and fuzzy negative ideal solution fnis simultaneously finally an example is shown to highlight the procedure of the proposed method at the end of this paper this paper shows that the proposed model is very well suited as a decision making tool for supplier selection decisions

switching regression models with imperfect sample separation information with an application on cartel stability an exogenous switching regression model with imperfect reginme classificationi information is specified and applied to a study of cartel stability an efficient estimation method is proposed which takes this imperfect information into account the consequences of misclassification are analyzed the direction of the least squares bias is derived an optimal regime classification rule is obtained and compared theoretically and empirically with other classification rules we then examine the joint executive committee a railroad cartel in the 1880 s the econometric evidence indicates that reversions to noncooperative behavior did occur for the firms in our sample and these reversions involve a significant decrease in market price this article is concerned with the possibility of estimating a switching regression model and its application to a study on cartel stability the switching regression model is the exogenous switching model proposed by quandt 24 which generalized a problem of mixture distributions day 4 the sample in this model is generated from distinct regression equations or regimes for each time period if the investigator has a priori information on how the sample is partitioned into the underlying regimes it is a switching regression model with known sample separation otherwise it is a model with unknown sample separation estimation of these latter models has been considered by quandt 24 goldfeld and quandt 8 and kiefer 14 16 among others a switching regression model is appropriate for the study of cartel behavior when there are price wars as firms will revert from cooperative to noncooperative behavior and so the industry supply function shifts occasionally this model will allow us to exploit the fact that there will be periodic stochastic switches or reversions between cooperative and noncooperative conduct in order to identify collusive episodes

sulfur dioxide control by electric utilities what are the gains from trade title iv of the 1990 clean air act amendments caaa established a market for transferable sulfur dioxide so2 emission allowances among electric utilities this market offers firms facing high marginal abatement costs the opportunity to purchase the right to emit so2 from firms with lower costs and this is expected to yield cost savings compared to a command and control approach to environmental regulation this paper uses econometrically estimated marginal abatement cost functions for power plants affected by title iv of the caaa to evaluate the performance of the so2 allowance market specifically we investigate whether the much heralded fall in the cost of abating so2 compared to original estimates can be attributed to allowance trading we demonstrate that for plants that use low sulfur coal to reduce so2 emissions technical change and the fall in prices of low sulfur coal have lowered marginal abatement cost curves by over 50 percent since 1985 the flexibility to take advantage of these chan

financial contagion through capital connections a model of the origin and spread of bank panics financial contagion is modeled as an equilibrium phenomenon in a dynamic setting with incomplete information and multiple banks the equilibrium probability of bank failure is uniquely determined we explore how the cross holding of deposits motivated by imperfectly correlated regional liquidity shocks can lead to contagious eects conditional on the failure of a financial institution we show that contagion is possible in the unique equilibrium of the economy and characterize exactly when it may exist at the same time we identify a direction of flow for contagious eects which provides a rationale for localized financial panics simulations identify the optimal level of interbank deposit holdings in the presence of contagion risk our results suggest that when the probability of bank failure is low maximal levels of interbank holdings are optimal when cross holding of deposits is complete we demonstrate that the intensity of contagion is increasing in the size of regionally aggregate liquidity shocks

switching regression estimates of the intergenerational persistence of consumption i introduction since the seminal work of friedman 1957 and modigliani and brumberg 1954 the fact that life cycle consumption is much smoother than income has been established as one of the cornerstones in macroeconomics economic agents are able to optimize on their life cycle consumption via the means of saving and borrowing similarly family dynasties may be able to optimize on their lifetime consumption across generations through the channel of intergenerational transfers however despite strong evidence of the massive intergenerational asset transfers kotlikoff and summers 1981 few studies except perhaps mulligan 1997 1999 and waldkirch ng and cox 2004 1 have explored the intergenerational dynamics of consumption by contrast there is a large body of estimates on intergenerational relationships in income or earnings for the united states and for other countries around the world 2 investigating the intergenerational consumption relationship would complement our knowledge of the relationship of intergenerational income or earnings consumption is a more direct measure of economic well being than income furthermore understanding the intergenerational effects of parental financial transfers on consumption would be helpful for sensible public policy design if parents are transferring resources in various forms including financial transfers in an optimal manner to promote their offspring s overall well being then government transfer programs that target disadvantageous individuals at specific life stages through specific channels e g education financial aids or food stamp programs may replace or crowd out parental inputs without achieving the same optimal effects on the overall well being of these individuals broadly our study is linked to the question of how to interpret parental financial transfers to their adult children 3 financial transfers from parents can occur in the form of inter vivos i e between living persons gifts 4 or bequests 5 6 the literature has debated on whether post education financial transfers are driven by parental altruism or by an exchange arrangement in return for services delivered or expected to be delivered from adult children previous studies have found evidence that inter vivos transfers are consistent with both motives cox 1987 1990 7 yet bequest transfers consistent with neither tomes 1981 wilhelm 1996 mcgarry 1999 showed that an altruistic parent makes inter vivos transfers to ease his child s liquidity constraints therefore strongly related to her current income and arranges bequest transfers in response to the child s permanent income therefore only partially related to her current income our study is more closely linked to the view that treats bequest receipt as a signal of access to credit markets for human capital investments becker and tomes 1986 argued that altruistic parents leave financial bequests to children only after they have made efficient human capital investments in their children under imperfect credit markets there are credit constrained parents who cannot self finance these investments without forgoing own consumption that has an opportunity cost higher than the market interest rate this results in a lower consumption transmission from parents to children in constrained families besides signaling access to credit markets financial transfers including bequests enable a parent to guard his her offspring against any relative downward trending of consumption that arises from relative downward trending of lifetime income thus contribute to a higher degree of persistence in consumption from this perspective the total welfare cost of credit constraints goes beyond what is revealed by education achievement or lifetime income and the benefit of being born in a richer family is not limited to being able to afford elite education this study tests the connection between credit constraint and intergenerational consumption persistence using bequest receipt as the signal of constraint status for the parental households

intergenerational linkages in consumption behavior consumption is partly a social activity yet most studies of consumer behavior treat households in isolation we investigate familial relationships in consumption patterns using a sample of parents and their children from the panel study of income dynamics we nd a positive and statistically signi cant parent speci c eect on children s consumption even after controlling for the eect of parental income and we nd similar eects for sibling pairs child consumption responds negatively to large post retirement shortfalls in consumption of the parents this behavior holds up even after allowing for the possibility of smaller parent to child transfers made necessary by the parental consumption shortfalls these results suggest that although income is an important source of the intergenerational correlation parental choices and experiences also aect consumption behavior of the children

intergenerational transfers and liquidity constraints a growing body of evidence indicates that liquidity constraints could affect a substantial proportion of u s consumers but little is known about why these constraints might exist an important but little explored issue is the relationship between inter vivos intergenerational transfers and liquidity constraints these transfers can ease borrowing constraints empirical transfer patterns match those predicted from a model in which transfers are allocated to liquidity constrained consumers in particular the distinction between current and permanent incomes of potential recipients is a key aspect of private transfer behavior the findings have important implications for our understanding of consumer behavior

a multicriteria method for environmental management system selection an intellectual capital approach abstract the adoption of environmental management systems has become more widespread among those firms looking to minimize their environmental impacts considering that firms have to select the optimal management system from a set of possible alternatives this paper presents a novel decision making approach based on the multicriteria method of analytic network process in order to evaluate and prioritize the implementation of environmental management system alternatives in for profit firms since several relevant intangible benefits are derived from the adoption of this kind of management system such as enhancing employees knowledge and skills as well as improving corporate reputation the method integrates and quantifies both financial and non financial intellectual capital value creation criteria in order to identify the alternative that maximizes a firm s total market value the proposed approach is empirically tested in a group of spanish olive oil firms with a proactive environmental management orientation and the results confirm the reliability of the proposed model furthermore the empirical applications reveal that all the olive oil firms attribute great importance to the intangible elements when assessing environmental management systems these results suggest that it is appropriate to take into account the intellectual capital value resulting from these kinds of management systems during the decision making process the proposed method formalizes the evaluation process that firms already employ these firms certainly take non financial capital value creation elements into account albeit in an intuitive way

sustainable design of renewable energy supply chains integrated with district heating systems a fuzzy optimization approach abstract this study aims to develop a comprehensive decision model for sustainable design of biomass based renewable energy supply chains and district heating systems dhs with thermal energy storages the model integrates the strategic decisions such as location and capacity selection for energy plants dhs thermal storages and biomass storages with tactical decisions related to biomass production supply and transportation planning inventory management and energy production the main purpose is to find the optimum configuration of the supply chain and dhs to meet the heat demand of a particular locality the model combines cost and service level objectives and accounts for biomass supply material flow capacity demand and technical constraints the problem is formulated as a fuzzy mixed integer linear programming milp model that comprises multiple biomass types and system uncertainties to explore the viability of the proposed model computational experiments are performed on a real world case sensitivity analyses are conducted to examine the impacts of cost and capacity limit of thermal energy storage as well as heat demand on the objective functions and thermal storage capacity the results reveal that the proposed model can effectively be used in practice to assist the decision makers in planning energy production systems in a sustainable and effective manner

networks and economic policy over the past two decades economists have made significant advances in understanding how networks affect individual behaviour and shape aggregate outcomes we argue that insights from network economics can play an important role in the design of economic policy focusing on six policy domains we show that network economics not only deepens our understanding of existing policy concerns but also suggests a number of new policy questions in each of these policy areas we evaluate the availability of data and assess the suitability of the network economics toolkit for policy work we conclude with a discussion of challenges to the adoption of network based methods in economic policy along with strategies to overcome them

testing for liquidity constraints in euler equations with complementary data sources previous tests for liquidity constraints using consumption euler equations have frequently split the sample on the basis of wealth arguing that low wealth consumers are more likely to be constrained we propose alternative tests using different and more direct information on borrowing constraints obtained from the 1983 survey of consumer finances in a first stage we estimate probabilities of being constrained which are then utilized in a second sample the panel study of income dynamics to estimate switching regression models of the euler equation our estimates indicate stronger excess sensitivity associated with the possibility of liquidity constraints than the sample splitting approach

trends in intergenerational income mobility previous studies of recent u s trends in intergenerational income mobility have produced widely varying results partly because of large sampling errors by making more efficient use of the available information in the panel study of income dynamics we generate more reliable estimates of the recent time series variation in intergenerational mobility our results which pertain to the cohorts born between 1952 and 1975 do not reveal major changes in intergenerational mobility

the role of networks in antitrust investigations antitrust investigations typically focus on the competitive pressures coming from within the defined markets of interest however competitive pressures can also come from other markets even when individually these markets place only weak constraints on one another collectively they may matter a networks approach to modelling competition permits a systemic view of competition that can sometimes paint a more accurate picture we demonstrate this through some simple examples and show more generally how tools from the networks literature can be applied to capture competition across a system of interrelated markets as a leading example we consider antitrust investigations into supermarkets where local geographic markets have been used as the basis of investigation

inter vivos transfers and intended bequests abstract empirical work on intergenerational transfers has focused on distinguishing between altruistic and exchange motivated behavior however these two models are unable to explain the strong tendency for inter vivos transfers to be negatively related to the income of the recipient while bequests bear no relationship to income this paper presents a new framework for analyzing transfers from parents to children that is more consistent with observed behavior than are the altruistic and exchange models alone in particular the model developed here predicts differing behavior with respect to inter vivos transfers and bequests due to liquidity constraints and uncertainty about the recipient s permanent income the empirical work uses data from the health and retirement study and the asset and health dynamics study the patterns observed in these data are consistent with earlier findings that inter vivos transfers go disproportionately to less well off children while bequests are divided equally across children further the results support the predictions of the model in that differences in inter vivos transfers arise from differences in current income while differences in bequests result when indicators of the children s permanent incomes differ

production networks and economic policy in this paper we show how to combine data on input output tables and recent insights from the theory of production networks in order to inform policy we first describe the information contained in input output tables compiled by statistical agencies and show how to derive relevant statistics of production networks we then discuss the implications of production networks for policy intervention in a series of domains such as fiscal policy industrial policy or finance finally we present a quantitative exercise applied to french data in order to illustrate that production networks shape the overall impact of competition policy on the economy

nonlinearities in intergenerational earnings mobility consequences for cross country comparisons we show that the patterns of intergenerational earnings mobility in denmark finland and norway unlike those for the us and the uk are highly nonlinear the nordic relationship between log earnings of sons and fathers is flat in the lower segments of the fathers earnings distribution sons growing up in the poorest households have the same adult earnings prospects as sons in moderately poor households and is increasingly positive in middle and upper segments this convex pattern contrasts sharply with our findings for the us and the uk where the relationship is much closer to being linear as a result cross country comparisons of intergenerational earnings elasticities may be misleading with respect to transmission mechanisms in the central parts of the earnings distribution and uninformative in the tails of the distribution it is now a stylised fact that intergenerational earnings mobility is higher in the nordic welfare state economies than in more market oriented economies such as the us see

integrated fuzzy multi criteria decision making method and multi objective programming approach for supplier selection and order allocation in a green supply chain abstract an organization s environmental performance is affected by its suppliers environmental performance and selecting green suppliers is a strategic decision in order to be more competitive in today s global market the supplier selection problem involves several quantitative and qualitative criteria in the supplier selection process if suppliers have limited capacity or other constraints it is necessary to determine the best supplier and order quantity of each supplier in this paper we present an integrated approach of fuzzy multi attribute utility theory and multi objective programming for rating and selecting the best green suppliers according to economic and environmental criteria and then allocating the optimum order quantities among them at first the fuzzy analytic hierarchy process and fuzzy technique for order preference by similarity to ideal solution is applied in order to analyze the importance of multiple criteria by incorporating experts opinion and to determine the best green suppliers next multi objective linear programming is used to consider and to formulate various constraints such as quality control capacity and other objectives the objective of the mathematical model is simultaneously to maximize the total value of purchasing and to minimize the total cost of purchasing to handle the subjectivity of decision makers preferences fuzzy logic has been applied the efficiency and application of the proposed approach has been illustrated with a case study in an automobile manufacturing company the obtained results help firms establish a systematic approach for tackling green supplier selection and order allocation problems in a realistic situation finally managerial implications conclusions and directions for additional research are introduced

developing green purchasing relationships for the manufacturing industry an evolutionary game theory perspective abstract green purchasing plays an increasingly significant role in today s supply chain management recycling as a key factor in sustainable development is seriously considered by many manufacturers during the process of procurement in order to establish long term green purchasing relationships between multi stakeholders suppliers and manufacturers in this study the supplier selection concept model suggested by de boer is updated and an evolutionary game model is developed to observe the cooperation tendency of multi stakeholders the newly proposed game model intensively studies the trade behavior which can be realized as strategies and payoff functions of the suppliers and manufacturers in addition a replicator dynamic system is formulated to study evolutionarily stable strategies of multi stakeholders to verify the theoretical results simulation experiments are conducted with meaningful results the manufacturing industry can form the patterns of sustainable development and the recycling capability of suppliers directly determines how green a supply chain is the results can guide stakeholders to make better decisions in the future

who is credit constrained in the u s economy an important assumption of the life cycle model of consumption is the postulate of perfect capital markets this hypothesis has recently been challenged by substantial empirical evidence hall and mishkin 1982 using the panel study of income dynamics estimate that 20 percent of united states families are liquidity constrained mariger 1986 derives a life cycle model with endogenous liquidity constraints and using a cross section estimates this fraction to be 19 4 percent hubbard and judd 1986 simulate a model with a constraint on net worth which shows that with reasonable assumptions about preferences 19 0 percent of united states consumers are liquidity constrained the emerging consensus points therefore to a fraction of approximately 20 percent of the population behaving in a manner that is inconsistent with the pure life cycle model in addition hayashi 1985 and zeldes 1989 investigate the correlation among consumption wealth and income for various population groups and infer that liquidity constraints are more important for younger families with low levels of wealth and saving the main limitation of these studies is that in their data sets constrained consumers are not observable and have to be identified via indirect evidence thus there is as yet little firm evidence about the characteristics of the consumers who are likely to be credit constrained this paper adopts an approach that differs from previous tests for liquidity constraints because it makes use of data where constrained consumers are observable and explicitly links their existence to credit market imperfections and personal characteristics the data drawn from the 1983 survey of consumer finances scf and described in section ii provide information on individuals whose request for credit has been rejected by financial intermediaries in section iii a model is developed in which consumers and lenders behavior jointly determines the probability that a consumer is rationed in the credit market this probability is then

the nature of credit constraints and human capital we develop a human capital model with borrowing constraints explicitly derived from government student loan gsl programs and private lending under limited commitment the model helps explain the persistent strong positive correlation between ability and schooling in the u s as well as the rising importance of family income for college attendance it also explains the increasing share of undergraduates borrowing the gsl maximum and the rise in student borrowing from private lenders our framework ofiers new insights regarding the interaction of government and private lending as well as the responsiveness of private credit to economic and policy changes

multi objective models for lot sizing with supplier selection abstract in this paper two multi objective mixed integer non linear models are developed for multi period lot sizing problems involving multiple products and multiple suppliers each model is constructed on the basis of three objective functions cost quality and service level and a set of constraints the total costs consist of purchasing ordering holding and backordering and transportation costs ordering cost is seen as an ordering frequency dependent function whereas total quality and service level are seen as time dependent functions the first model represents this problem in situations where shortage is not allowed while in the second model all the demand during the stock out period is backordered considering the complexity of these models on the one hand and the ability of genetic algorithms to obtain a set of pareto optimal solutions we apply a genetic algorithm in an innovative approach to solve the models comparison results indicate that in a backordering situation buyers are better able to optimize their objectives compared to situations where there is no shortage if we take ordering frequency into account the total costs are reduced significantly

bequest behavior and the effect of heirs earnings testing the altruistic model of bequests that parents transfer resources to children because of altruistic concern is a reasonable a priori assumption however economic theories of altruistic transfers have produced many counterintuitive conclusions and consequently much debate when applied to bequests these theories predict that inheritances will compensate for earnings differences between siblings as well as between parents and children this paper tests these implications using a new data set centered on federal estate tax returns little support can be found for an altruistic theory of bequests this finding has implications for macroeconomic policy government transfer programs and inequality copyright 1996 by american economic association

fortunate sons new estimates of intergenerational mobility in the united states using social security earnings data previous studies relying on short term averages of fathers earnings have estimated the intergenerational elasticity ige in earnings to be approximately 0 4 due to persistent transitory fluctuations these estimates have been biased down by approximately 30 or more using administrative data containing the earnings histories of parents and children the ige is estimated to be around 0 6 this suggests that the united states is substantially less mobile than previous research indicated estimates of intergenerational mobility are significantly lower for families with little or no wealth offering empirical support for theoretical models that predict differences due to borrowing constraints

supplier selection order allocation a two stage multiple criteria dynamic programming approach this paper proposes a two stage multiple criteria dynamic programming approach for two of the most critical tasks in supply chain management namely supplier selection and order allocation in the first stage to address multiple decision criteria in supplier ranking the analytic hierarchy process ahp is employed in the second stage supplier ranks are fed into an order allocation model that aims at maximizing a utility function for the firm as well as minimizing the total supply chain costs subject to constraints on demand capacity and inventory levels a dynamic programming approach is crafted to solve the proposed bi objective model

trade credit and the propagation of corporate failure an empirical analysis using an exhaustive data set on claims held by trade creditors suppliers on failed trade debtors customers we quantify the importance of trade credit chains for the propagation of corporate bankruptcy we show that trade creditors experience significant trade credit losses due to trade debtor failures and that creditors bankruptcy risks increase in the size of incurred losses by exploring the roles of financial constraints and creditor debtor dependences we infer that the trade credit failure propagation mechanism is driven by both credit losses and demand shrinkage finally we show that the documented propagation mechanism constitutes a significant part of the overall bankruptcy frequency suggesting that it has measurable implications for the aggregate level

human capital heterogeneity and estimated degrees of intergenerational mobility we study the parental investment model of intergenerational mobility where heterogeneity in innate earnings ability and parents altruism rate is explicitly modelled we show that heterogeneity increases the difficulty of detecting the existence of borrowing constrained families conversely the presence of heterogeneity means that economic and linear statistical models of inheritance generate similar intergenerational data on consumption and earnings we also suggest that nay cross country differences in intergenerational earnings mobility are more readily interpreted according to the heterogeneity of inherited ability rather than optimal family responses to countiy specific institutions for accumulating human capital the relationship between a citizen s economic status and his family background is an important clue for understanding and evaluating a country s economic performance some eg bowles 1972 have suggested a close relationship between economic status and family background indicates some failure of labour markets or of institutions fostering investment in human capital others eg altonji et al 1992 mulligan 1997 table 4 1 have offered an apparently contradictory suggestion that efficient allocations involve a very close relationship on some measures between the economic status of parents and children still others find family background effects to be the most offensive sources of inequality regardless of whether those effects are consistent with efficiency empirical studies of this relationship date back to the earliest days of statistical social science eg galton s 1869 british study of the success and eminence of relatives and many can be found outside the field of economics see goode s 1966 survey for a few examples but the increasing availability of new data sets for exploring the relationship between earnings income wealth and consumption of parents and years later of adult children has appropriately led to new and better econometric estimates of intergenerational mobility or the intergenerational auto regression of various measures of economic status and has even permitted some careful comparisons of those estimates across countries however fewer results are available on interpreting such estimates in terms of economic models of inheritance or of the labour market loury 1981 and becker and tomes 1986 are among the exceptions where they show how access to capital markets or other means of

moral hazard vs liquidity and optimal unemployment insurance this paper presents new evidence on why unemployment insurance ui benefits affect search behavior and develops a simple method of calculating the welfare gains from ui using this evidence i show that 60 percent of the increase in unemployment durations caused by ui benefits is due to a liquidity effect rather than distortions on marginal incentives to search moral hazard by combining two empirical strategies first i find that increases in benefits have much larger effects on durations for liquidity constrained households second lump sum severance payments increase durations substantially among constrained households i derive a formula for the optimal benefit level that depends only on the reduced form liquidity and moral hazard elasticities the formula implies that the optimal ui benefit level exceeds 50 percent of the wage the exact identification approach to welfare analysis proposed here yields robust optimal policy results because it does not require structural estimation of primitives

intergenerational mobility new evidence from consumption data the intergenerational persistence of consumption describes the extent to which children inherit the living standards of their parents evidence on this parameter is scarce due to limited data on the joint consumption of parents and children this paper identifies parents who participated in the danish expenditure survey links them to their children through population wide danish registries and estimates the intergenerational elasticity of consumption in denmark the results suggest that consistent with intergenerational consumption smoothing the persistence of consumption across generations is higher than the persistence of earnings and income

a superior measure of consumption from the panel study of income dynamics abstract this paper provides a simple technique for assigning a measure of total consumption to households in the panel study of income dynamics psid using regressions from the consumer expenditure surveys of 1972 1973 and 1983 linear predictions of total consumption are estimated which are stable over time and explain up to 78 percent of the total variance in consumption

galton versus the human capital approach to inheritance a century ago francis galton proposed a simple yet powerful model of inheritance gary backer s human capital model is often used to analyze important empirical and policy questions but does it dominate galton s from a positive point of view i derive nine implicatiions of the human capital approach that are distinct from galton s evidence from the pis scf and nlsy micro data sets as well as results reported in previous literatures suggest that four of the unique implications are refuted two implications are verified and mixed results are obtained for three others some extensions of economics recently developed by becker and others when applied to inheritance may improve economics predictions

the total cost of logistics in supplier selection under conditions of multiple sourcing multiple criteria and capacity constraint abstract little attention is given in the literature to decisions on the appropriate selection of suppliers and on assigning order quantities to these suppliers in the case of multiple sourcing with multiple criteria and with suppliers capacity constraints only a few mathematical programming models to analyse such decisions have been published to date and these have tended to consider only net price as the cost of purchasing although the costs of transportation ordering and storage may be significantly important to the decision in this paper a mixed integer non linear programming model is presented to solve the multiple sourcing problem which takes into account the total cost of logistics including net price storage transportation and ordering costs buyer limitations on budget quality service etc can also be considered in the model an algorithm is proposed to solve the model and the model is illustrated using a numerical example

accounting for intergenerational income persistence noncognitive skills ability and education we analyse in detail the factors that lead to intergenerational persistence among sons where this is measured as the association between childhood family income and later adult earnings we seek to account for the level of income persistence in the 1970 bcs cohort and also to explore the decline in mobility in the uk between the 1958 ncds cohort and the 1970 cohort the mediating factors considered are cognitive skills non cognitive traits educational attainment and labour market attachment changes in the relationships between these variables parental income and earnings are able to explain over 80 of the rise in intergenerational persistence across the cohorts

role of multiple stakeholders and the critical success factor theory for the sustainable supplier selection process abstract the concept of sustainability has become an essential theme for many industries and organisations due to a heightened sensitivity towards environmental protection and social responsibility at the same time firms still need to achieve economic viability and retain their competitive advantage because suppliers are the first entity and the initial source of any supply chain organisations should select their suppliers by a careful evaluation of their critical success factors csf achieving a successful sustainable supply chain management sscm strategy requires a firm to consider its stakeholders views based on the csf theory and by considering the multi stakeholders view in a sustainability perspective this work provides a decision support system for the sustainable supplier selection sss problem in a real world textile industry located in the emerging economy of india through a three phase methodology this study examines indian suppliers by considering the sustainability views of various stakeholders including employees customers researchers shareholders and a government environmental officer the csf priorities show that the first four influential csfs are categorized as social concerns i e maintaining long term relationships and alliances stakeholder empowerment equity labour sources and individual human rights the fifth factor is an environmental issue i e production of polluting agents among the five suppliers being evaluated in this work supplier 4 receives the top ranking specifically the results show that the supplier rankings are highly influenced by csf s social dimensions hence to validate the influence of csf s social dimensions in relation to the sss process a sensitivity analysis has been done by varying the respective weights the study concludes with the relevant managerial implications and limitations

excess sensitivity and asymmetries in consumption an empirical investigation most empirical studies on liquidity constraints classify a consumer as being constrained on the basis of a single indicator such as the asset to income ratio in this analysis the authors model the probability that a consumer faces liquidity constraints as a function of multiple social and economic factors this probability function is estimated simultaneously with the degree of excess sensitivity of consumption to income in a switching regressions framework the switching regressions apply optimal weights to the densities for the euler equations in the two states and are less susceptible to sample misclassification our results based on data from the cex confirm that liquidity constrained consumers are excessively sensitive to variables already known to economic agents however there is also evidence that the unconstrained consumers exhibit behavior that is inconsistent with the theoretical predictions further analysis suggests that such behavior could be explained by time non separable preferences copyright 1997 by ohio state university press

the role of intergenerational transfers in aggregate capital accumulation this paper uses historical u s data to directly estimate the contribution of intergenerational transfers to aggregate capital accumulation the evidence presented indicates that intergenerational transfers account for the vast majority of aggregate u s capital formation only a negligible fraction of actual capital accumulation can be traced to life cycle or hump savings a major difference between this study and previous investigations of this issue is the use of more accurate longitudinal age earnings and age consumption profiles these profiles are simply too flat to generate substantial life cycle savings this paper suggests the importance of and need for substantially greater research and data collection on intergenerational transfers life cycle models of savings that emphasize savings for retirement as the dominant form of capital accumulation should give way to models that illuminate the determinants of intergenerational transfers

credit contagion from counterparty risk standard credit risk models cannot explain the observed clustering of default some times described as credit contagion this paper provides the first empirical analysis of credit contagion via direct counterparty effects we find that bankruptcy announce ments cause negative abnormal equity returns and increases in cds spreads for credi tors in addition creditors with large exposures are more likely to suffer from financial distress later this suggests that counterparty risk is a potential additional channel of credit contagion indeed the fear of counterparty defaults among financial institu tions explains the sudden worsening of the credit crisis after the lehman bankruptcy in september 2008

targeted carbon tax reforms abstract in the presence of intersectoral linkages sector specific carbon tax changes can have complex general equilibrium effects in particular a carbon tax on the emissions of a sector can lead to an increase in aggregate emissions we analytically characterise how incremental taxes on the emissions of any set of sectors affect aggregate emissions we show that carbon tax reforms that target sectors based on their position in the production network can achieve a greater reduction in aggregate emissions than reforms that target sectors based on their direct emissions alone we illustrate the effects of carbon tax reforms by calibrating our intersectoral network model to the economies of two countries

networks and systemic risk in the financial system the complex web of exposures and interlinkages across the financial system highlights the relevance of network analysis in understanding systemic risk and guiding the design of financial regulation this paper discusses how network models and those based on epidemiological approaches in particular offer a compelling description of the structure of real world financial systems and shed light on different contagion mechanisms seen during the global financial crisis we also review how these insights may inform macroprudential risk assessment and policy in the areas of stress testing the financial system and the regulation of systemically important institutions the role of non bank financial intermediation and social networks in shaping financial system risk is also briefly considered

consumption down payments and liquidity constraints one frequently cited explanation for the empirical failure of the orthodox life cycle permanent income hypothesis lc pih is the presence of binding liquidity constraints households inability to borrow and lend at the same interest rate or to borrow the desired quantity can distort household consumption profiles depressing consumption during periods when constraints bind whether or not liquidity constraints bind has important implications for the sensitivity of consumption to fluctuations in income the neutrality of government debt and the structure of taxation despite the potential importance of liquidity constraints in understanding macroeconomic behavior there has been comparatively little research into the effect of specific constraints on consumption one area of consumer behavior where liquidity constraints arguably may be important is in housing decisions and mortgage markets households wishing to own a first home must accumulate a down payment in order to qualify for a mortgage loan currently for conventional mortgages in the united states most lending institutions require between s percent and 20 percent of the purchase price of the home put down in advance of the purchase 2 without access to private gifts or loans many

motives for private income transfers private income transfers are becoming increasingly recognized as a key aspect of the u s economy the majority of private income transfers occur inter vivos i e between living persons but very little is known about this type of transfer behavior this paper tests alternative hypotheses concerning motivation for inter vivos transfers two motives are considered altruism and exchange evidence presented here casts doubt on the altruistic model of transfer behavior observed patterns for inter vivos transfers are more consistent with exchange related motives this finding has important implications for the effects of public transfer programs on the distribution of economic well being

the family inheritance and the intergenerational transmission of inequality unequal inheritance of material wealth is commonly considered a major cause of inequality in consumption however theoretical models of the intergenerational transmission of inequality by becker blinder and ishikawa imply that unequal inheritance may either increase or reduce consumption inequality differences in inherited wealth resulting from unequal parental incomes increase inequality in recipients consumption however unequal bequests caused by differences among families in the endowed ability of children or the costs of producing human capital are equalizing empirical results confirm these predictions the inheritance received by children is inversely related to both children s income and parental education thus bequests are compensatory in that ceteris paribus low income children inherit more than their advantaged contemporaries

parental altruism and inter vivos transfers theory and evidence this paper uses psid data on the extended family to test whether inter vivos transfers from parents to children are motivated by altruism specifically the paper tests whether an increase by one dollar in the income of parents actively making transfers to a child coupled with a one dollar reduction in that child s income results in the parents increasing their transfer to the child by one dollar this restriction on parental and child transfer income derivatives is derived for the standard altruism model augmented to include uncertainty and liquidity constraints these additional elements pin down the timing of inter vivos transfers the method used to estimate income transfer derivatives takes into account unobserved heterogeneity across families in the degree of altruism the findings strongly reject the altruism hypothesis redistributing one dollar from a recipient child to donor parents leads to less than a 13 cent increase in the parents transfer to the child far less than the one dollar increas

intergenerational income mobility among daughters new evidence on daughters intergenerational mobility in a framework that encompasses women not in the labor force using broader measures of economic status than just the women s own earnings is presented and the role of husbands earnings is highlighted a parallel analysis of sons mobility is performed intergenerational transmission of income status may be weaker for daughters than for sons but is still quite substantial assortative mating is an important element in the intergenerational transmission process

intergenerational mobility and marital sorting we use data from the german socio economic panel and the british household panel survey to estimate the extent of intergenerational economic mobility in a framework that highlights the role played by assortative mating we find that assortative mating plays an important role on average about 40 50 of the covariance between parents and own permanent family income can be attributed to the person to whom one is married this effect is driven by strong spouse correlations in human capital which are larger in germany than britain 2006 the authors journal compilation royal economic society 2006

from micro to macro via production networks amodern economy is an intricately linked web of specialized production units each relying on the flow of inputs from their suppliers to produce their own output which in turn is routed towards other downstream units in this essay i argue that the structure of this production network is key in determining whether and how microeconomic shocks affecting only a particular firm or technology along the chain propagate throughout the economy and shape aggregate outcomes therefore understanding the structure of this production network can better inform both academics on the origins of aggregate fluctuations and policy makers on how to prepare for and recover from adverse shocks that disrupt these production chains two recent events have brought to the forefront the importance of interconnections between firms and sectors in aggregate economic performance consider first the 2011 earthquake in japan while the triple tragedy of the earthquake the ensuing tsunami and the near nuclear meltdown at fukushima surely resulted in a significant destruction of human and physical capital its effects would have been largely restricted to the affected areas were it not for the disruption of national

interbank contagion at work evidence from a natural experiment this article tests financial contagion due to interbank linkages for identification we exploit an idiosyncratic sudden shock caused by a large bank failure in conjunction with detailed data on interbank exposures first we find robust evidence that higher interbank exposure to the failed bank leads to large deposit withdrawals second the magnitude of contagion is higher for banks with weaker fundamentals third interbank linkages among surviving banks further propagate the shock finally we find results suggesting that there are real economic effects these results suggest that interbank linkages act as an important channel of contagion and hold important policy implications jel g01 g21 g28 e58 since the onset of the financial turmoil increased uncertainty reflected particularly in counterparty risk has led banks to hoard liquidity this has resulted in a significant decline of trading in the interbank money markets jean claude trichet president of the european central bank december 2008

real business cycles in this paper we demonstrate how certain very ordinary economic principles lead maximizing individuals to choose consumption production plans that display many of the characteristics commonly associated with business cycles our explanation is entirely consistent with i rational expectations ii complete current information iii stable preferences iv no technological change v no long lived commodities vi no frictions or adjustment costs vii no government viii no money and ix no serial dependence in the stochastic elements of the environment we also provide a completely worked out example of the type of artificial economy we have in mind the time series properties of the example exhibit some major features of observed business cycles although this type of model may not be capable of explaining all of the regularities in actual business cycles we believe that it provides a useful well defined benchmark for assessing the relative importance of factors e g monetary disturbances

a weighted max min model for fuzzy multi objective supplier selection in a supply chain abstract supplier selection is one of the most important activities of purchasing departments this importance is increased even more by new strategies in a supply chain supplier selection is a multi criteria decision making problem in which criteria have different relative importance in practice for supplier selection problems many input information are not known precisely the fuzzy set theories can be employed due to the presence of vagueness and imprecision of information a weighted max min fuzzy model is developed to handle effectively the vagueness of input data and different weights of criteria in this problem due to this model the achievement level of objective functions matches the relative importance of the objective functions in this paper an analytic hierarchy process ahp is used to determine the weights of criteria the proposed model can help the decision maker dm to find out the appropriate order to each supplier and allows the purchasing manager s to manage supply chain performance on cost quality and service the model is explained by an illustrative example

cascading failures in production networks i show how the extensive margin of firm entry and exit can greatly amplify idiosyncratic shocks in an economy with a production network i show that canonical input output models which lack the extensive margin of firm entry and exit have some crucial limitations in these models the systemic importance of a firm does not respond to productivity shocks depends only on the firm s role as a supplier and is equal to or well approximated by the firm s size this means that for every canonical input output model there exists a non interconnected model that has the same aggregate response to productivity shocks i show that when we allow for entry and exit the systemic importance of a firm responds endogenously to productivity shocks depends on a firm s role not just as a supplier but also as a consumer and a firm s systemic influence is no longer well approximated by its size furthermore i show that nondivisibilities in systemically important industries can cause one failure to snowball into a large scale avalanche of failures in this sense shocks can be amplified as they travel through the network whereas in canonical input output models they cannot