substitutability among undesirable outputs in recent years economists have started to move beyond calculating regulatory effects on a pollutant by pollutant basis since their interaction is important in this study we take up this issue to allow for joint production of multiple pollutants and marketable output we specify our technology using a directional distance function this allows us to treat pollutants as joint outputs yet accounts for their undesirability we estimate the distance function for a sample of coal fired electric power plants from 1985 to 1998 which includes the first 4 years of phase i of the clean air act amendments of 1990 we focus on the interaction between so2 and no x as they became more highly regulated and estimate shadow prices of the pollutants and the morishima elasticity of transformation between two pollutants no x and so2 as well as with respect to the desirable output kilowatt hours of electricity as expected we find that power plants increase no x emissions as they decrease so2 i e they are subs

measuring technical and environmental efficiency in a state contingent technology most developed countries support farming activities through policies that are tailored to meet their specific social economic and environmental objectives economic and environmental efficiency have recently become relevant targets of most of these policies whose sound implementation can be enhanced by monitoring farm performance from a multidimensional perspective this paper proposes farm level technical and environmental efficiency measures that recognize the stochastic conditions in which production takes place a state contingent framework is used to model production uncertainty an implementable representation of the technology is developed using data envelopment analysis the application focuses on a sample of catalan arable crop farms results suggest that technical efficiency is slightly lower in bad than in good growing conditions nitrogen pollution can decrease substantially more under good than bad growing conditions

note on international differences in service prices and some related empirical phenomena abstract this paper provides an alternative explanation of some important stylized facts of development including the phenomenon of international differences in service prices in terms of differences in factor endowments between countries in so doing this paper advances a general equilibrium model of a small open economy which features non traded goods as well as demand factors thereby incorporating important economic aspects which were neglected by many others an interesting finding which emerges from this exercise is that many puzzles in development can be explained simply in terms of differences in factor endowments between countries

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

a note on international migration non traded goods and economic welfare in the source country abstract this note extends the work of rivera batiz to the case where capital is collectively owned and the decision to emigrate entails both a withdrawal of labor services from the source country and the surrender of the ownership of capital in this framework which seems to have wide real world relevance for socialist labor managed and peasant economies it is found that emigration helps increase the welfare of the non migrant this result which seems quite robust to its specifications is exactly the opposite of that of rivera batiz and points to the need for great caution in drawing policy conclusions with regard to issues pertaining to emigration

technical efficiency shadow price and substitutability of chinese industrial so2 emissions a parametric approach abstract in china s transition process towards sustainable development fighting against the rising so2 emission has become a great and urgent challenge based on a parametric quadratic directional distance function this paper investigates the inefficiency level shadow price and substitution elasticity of chinese industrial so2 emission from 1998 to 2011 the results show a u shape for the technical inefficiency indicating an efficiency improvement before 2005 but it getting worse since then which is that the east area displays a declining trend while the west goes up and the middle follows the national pattern at the east middle west region level as of the shadow price and morishima elasticity both the national and regional levels hold an increasing trajectory the shadow price is continuously increased a lot during the whole period implying to control additional so2 emission become more costly the positive morishima substitution elasticity suggests there may exist the win win opportunities for so2 regulation moreover the large regional disparity highlights the needs to adopt a differentiated regional policy

international migration non traded goods and economic welfare in the source country abstract this paper examines the economic effects of emigration in a source country producing both traded and non traded commodities it is shown that even if the economy faces fixed terms of trade emigration can still affect the welfare of the non migrants and the direction of the effect in this context will always be negative

shadow pricing of undesirable outputs in nonparametric analysis abstract for three decades a growing interest in the modeling of desirable and undesirable outputs has led to a theoretical and methodological debate in the nonparametric literature on production technology and efficiency the first main discussion is about the way of modeling bad undesirables as inputs or outputs or by transformation functions the second debate concerns the implications of the weak disposability assumption in the modeling of bad outputs in particular the possibility of assigning unexpected signs to shadow prices of bad outputs in addition we point out a current error in the modeling of weak disposability under a variable returns to scale technology in this paper we introduce a hybrid model to ensure the economically meaningful jointness of good and bad outputs while constraining shadow prices of bad outputs to their expected sign we argue that it is a sound compromise to model undesirable outputs with a meaningful primal dual economic interpretation finally we propose an extension to define shadow prices for undesirable outputs following the law of one price loop rule

the path of price changes in vertical integration the paper examines the path of final good price changes when a monopoly supplier of an intermediate good vertically integrates into a competitive constant returns final good industry i show that the price rises while the monopolist is taking over the downstream industry and then falls after downstream monopolization is complete the relationship of these results to the existing literature on full forward integration is established

cost functions and duality for stochastic technologies cost functions dual to stochastic production technologies are derived and their properties are discussed these cost functions are shown to be consistent with expected utility maximization without placing serious structural restrictions on the underlying technology

estimating state contingent production frontiers chambers and quiggin 2000 use state contingent representations of risky production technologies to establish important theoretical results concerning producer behavior under uncertainty unfortunately perceived problems in the estimation of state contingent models have limited the usefulness of the approach in policy formulation we show that fixed and random effects state contingent production frontiers can be conveniently estimated in a finite mixtures framework an empirical example is provided compared to conventional estimation approaches we find that estimating production frontiers in a state contingent framework produces significantly different estimates of elasticities firm technical efficiencies and other quantities of economic interest

cascading contingent protection and vertical market structure abstract cascading contingent protection may occur when protection of an upstream industry transfers injury to the downstream industry and increases the likelihood that this industry asks and receives protection this paper examines cascading protection within a sequential petitioning model where the upstream industry acts as leader the analysis identifies market structure and the vertical linkage between the upstream and the downstream industry as important determinants of the occurrence of cascading protection it is shown that the circumstances which make cascading protection more likely to occur also make it more likely that this protection has serious negative welfare consequences

marginal abatement costs of carbon dioxide emissions in china a parametric analysis this paper investigates the technical inefficiency shadow price and substitution elasticity of hbox co 2 emissions of china based on a provincial panel for 2001 2010 using linear programming to calculate a quadratic parameterized directional output distance function we show that china s technical inefficiency increases over the period implying further scope for hbox co 2 emissions reduction in the medium and longer term at best by 4 5 and 4 9 respectively our results notwithstanding regional differences highlight increases in the shadow price of hbox co 2 abatement 1 000 yuan ton in 2001 to 2 100 yuan ton in 2010 additionally increasingly steep substitution elasticity highlights the difficult reality of reducing china s hbox co 2 emissions

the effects and incentive of vertical mergers an analysis from the view of om abstract we investigate the effects and incentive of vertical mergers in a supply chain with three types of firms i e suppliers manufacturers and integrated firms integrated firms can sell both intermediate and final goods while suppliers and manufacturers can sell only intermediate or final goods respectively whether selling intermediate goods to other manufacturers is introduced as the integrated firms endogenous decisions we find that a vertical merger always decreases the price of final products both the production quantity and the profits of each unintegrated manufacturer and integrated firm and most of the time leads to a drop in the total profit of the supply chain while it always results in a rise in the quantity of final products and social welfare second we find that market foreclosure only happens when competition among integrated firms is weak and vertical mergers occur only when competition among unintegrated manufacturers is weak finally we provide a theoretical explanation for the phenomenon of merger waves with the aid of our model

estimating shadow prices and efficiency analysis of productive inputs and pesticide use of vegetable production this paper analyzes technical efficiency and the value of the marginal product of productive inputs vis a vis pesticide use to measure allocative efficiency of pesticide use along productive inputs we employ the data envelopment analysis framework and marginal cost techniques to estimate technical efficiency and the shadow values of each input a bootstrap technique is applied to overcome the limitations of dea and helps to estimate the mean and 95 percent confidence intervals of the estimated quantities the methods are applied to a sample of vegetable producers in benin over the period 2009 2010 results indicated that bias corrected technical efficiency scores are lower than the initial measures and the former estimates are statistically significant the application results show that vegetable producers are less efficient with respect to pesticide use than other inputs also results suggest that pesticides land and fertilizers are overused

vertical integration scale distortions partial integration and the direction of price change two new features are introduced in a standard model of forward vertical integration by an intermediate good monopolist into a contestable downstream industry first u shaped average costs replace constant returns in the downstream industry second the effect of subjecting the monopolist to the pressure of upstream entry is explored it is found that monopoly pricing of the intermediate good can distort the scale as well as the input proportions of the downstream firms either distortion leads to integration but here integration may be partial rather than full prices rise with partial integration when there is no upstream entry but prices fall when upstream entry is free

a cost approach to economic analysis under state contingent production uncertainty this article explores the economics of input decision under production uncertainty the article develops a methodology to specify and estimate cost minimizing input decisions under a state contingent technology the analysis is applied to time series data on u s agriculture it finds strong empirical evidence that expected output alone does not provide an appropriate representation of production uncertainty the results provide empirical support for an output cubical technology this indicates that an ex post analysis of stochastic technology appears appropriate the analysis also provides evidence that the cost of facing production risk has declined in u s agriculture over the last few decades copyright 2008 oxford university press

evaluation of social externalities in regional communities affected by coal seam gas projects a case study from southeast queensland this paper examines the evaluation of social externalities in regional communities affected by four major coal seam gas csg projects in the surat basin region of southeast queensland australia using a mixed methods approach cross sectional survey n 428 and structural equation modelling sem the results of this study reveal community perceptions of rising economic inequality collective sense of uncertainty about the future and negative impacts on the standard of living in the affected regions for example the majority of the respondents are concerned about the rising cost of living in the area 83 4 the long term impacts on groundwater 77 4 and how their community is being affected 77 3 we found that perceptions of fairness and inequity weigh heavily especially on farmers and correlate to negative psychosocial effects our analysis shows that unresolved concerns of community residents about environmental and social issues and the loss of confidence in the local government contribute to lower life satisfaction inhibit the community s ability to plan for the future and lead to a weaker local economy

international migration remittances and welfare in a dependent economy abstract this note extends the work of rivera batiz 1982 in an attempt to examine the role of remittances in determining the effects of migration on the welfare of the remaining residents in a small open economy producing both traded and non traded goods it is shown that if the flow of remittances exceeds a certain critical amount the remaining residents benefit from migration even if they do not receive any of the remittances themselves this is in sharp contrast with the results of the rivera batiz model in which the possibility of a gain for the non migrants is ruled out

evaluation of the environmental economic and social performance of soybean farming systems in southern brazil soybean production has a crucial role in the development of brazilian agriculture and recently became the most important commodity in brazilian agribusiness various soybean farming systems exist which are claimed to differ in terms of sustainability performance in this regard evaluation of environmental economic and social performance of different soybean farming systems in brazil by consideration of variability in input parameters is critically needed in this context we evaluated a number of environmental economic and social issues for the two main soybean farming systems in southern brazil the conventional system which produces genetically modified gm or non genetically modified non gm soybeans and the organic system data were collected for 2012 from three sources soybean farms in parana brazil 15 gm 15 non gm and 15 organic farms the brazilian enterprise for agricultural research embrapa and expert elicitation monte carlo simulation was used to account for the variation in input parameters five sustainability issues were evaluated in this study global warming land occupation primary energy use profitability and employment results revealed that compared with the gm and non gm systems organic systems had a higher probability 77 to have a lower global warming potential land occupation was higher and energy use was lower for organic systems than for the gm and non gm systems at every level of probability concerning profitability organic systems had a higher probability 60 to have higher profitability compared with gm and non gm production and employment was higher for organic systems at every level of probability overall simulation results of this study illustrated the relatively high level of variation in the environmental economic and social performance of organic soybean farming systems this study shows that accounting for variability in key system parameters provides not only insight in the most likely outcomes but also in the robustness of system performance

social sustainability assessments in the biobased economy towards a systemic approach abstract the majority of impact assessments for the biobased economy are primarily focused on the environmental and techno economic aspects while social aspects are rarely considered this study proposes a modified systemic approach for a social sustainability impact assessment of the biobased economy based on a review on the common methodologies for assessing social impacts accordingly the proposed approach follows the four general iterative steps of social life cycle analysis slca as it considers all life cycle phases of the biobased economy the systemic approach considers the potential social impacts on local communities workers and consumers as the main three groups of the stakeholders the review showed that the most common social indicators for inventory analysis within the biobased economy include health and safety food security income employment land and worker related concerns energy security profitability and gender issues multi criteria decision analysis mcda was also highlighted as the broadly utilized methodology for aggregating the results of impact assessments within the biobased economy taking a life cycle perspective this study provides a holistic view of the full sustainability of research design and innovation in the biobased economy by suggesting the integration of the social aspects with techno economic and an environmental life cycle assessment our proposed systemic approach makes possible to integrate the social impacts that are highly valued by the affected stakeholders into the existing sustainability models that focus only on environmental and techno economic aspects we discuss the steps of the proposed systemic approach in order to identify the challenges of applying them within the biobased economy these challenges refer mainly to the definition of the functional unit and system boundaries the selection and the analysis of social indicators inventory analysis the aggregation of the inventory to impact categories and the uncertainties associated with the social sustainability evaluation the result of this review and the proposed systemic approach serve as a foundation for industry and policy makers to gain a better insight into the importance of social sustainability impacts assessment within the biobased economy

approaching the environmental sustainable value in agriculture how factor endowments foster the eco efficiency abstract small and labor intensive farms guarantee a higher degree of environmental sustainability compared to rich capital intensive farms this paper offers a methodological contribution to the value based sustainability approach consisting in computing a modified indicator of environmental sustainable value using this approach the authors test how factor endowments such as capital land and labor contribute to environmental sustainable value using a long term panel of region representative european union farm accountancy data network farms in 2004 2015 the seminal within between specification was employed to control time variant and time in variant space heterogeneity of european regions the articles main finding is that higher capital endowment and lower labor intensity is beneficial for environmental sustainable value the result that farming with higher labor endowment might be less eco efficient contradicts the commonly known perception of this problem in light of our findings we conclude that the pro investment direction of the common agricultural policy should be followed but one size fit all policy is not working

shadow prices of social capital in rural india a nonparametric approach this article studies the role of social capital on cotton production efficiency and productivity for a sample of small farms in maharashtra india using data envelopment analysis input shadow prices are computed as an indicator of the importance of social capital relative to other inputs results suggest social capital to be the input with the highest contribution to production efficiency after land the luenberger indicator is used to assess the productivity improvement associated to an investment in social capital which is found to be on the order of 12 undertaking collective production activities is found to play an important role in improving productivity this is especially relevant to agricultural households facing important economic and institutional restrictions that make it difficult to increase conventional expensive inputs

measurement of agricultural total factor productivity growth incorporating environmental factors a nutrients balance approach this article proposes to use nutrient orientated environmental efficiency ee measures to construct a nutrient total factor productivity index ntfp since nutrient orientated ee measures are consistent with the materials balance principle ntfp index is superior to other existing tfp indexes an empirical study on the environmental performance of an agricultural sector in 30 oecd countries from 1990 to 2003 yielded several important findings first these countries should be able to produce current outputs with at least 50 less aggregate eutrophying power implying that they should have been able to substantially reduce the potential for eutrophication second traditional tfp has grown by 1 6 per annum due to technical progress however there are lags in the responses of several countries to this technical progress third environmental tfp has grown at a slower rate than traditional tfp growth due to reductions in nutrient orientated allocative efficiency finally changes in input combinations could have significantly improved environmental efficiency and productivity these findings favor policy interventions and faster technological transfer to improve environmental performance

agricultural pesticides and land use intensification in high middle and low income countries abstract we study levels and trends in agricultural pesticide use for a large cross section of countries using fao data for the period 1990 2009 our analysis shows that a 1 increase in crop output per hectare is associated with a 1 8 increase in pesticide use per hectare but that the growth in intensity of pesticide use levels off as countries reach a higher level of economic development however very few high income countries have managed to significantly reduce the level of intensity of their pesticide use because decreases in insecticide use at higher income levels are largely offset by increases in herbicide and fungicide use the results also show very rapid growth in the intensity of pesticide use for several middle income countries such as brazil mexico uruguay cameroon malaysia and thailand complementing our analysis with data from the rotterdam convention on prior informed consent pic we show that hazardous pesticides covered in the pic procedure are more weakly regulated in lower than in higher income countries we discuss the policy challenges facing developing countries with a rapid growth in pesticide use and recommend a four pronged strategy including an environmental tax on pesticides with revenues allocated to long term investments in awareness building the development of integrated crop management methods and the setting of food safety standards the interactions between these measures should help contribute to the effectiveness of the overall strategy package

valuing social sustainability in agriculture an approach based on social outputs shadow prices abstract interest in sustainability has gained ground among practitioners academics and policy makers due to growing stakeholders awareness of environmental and social concerns this is particularly true for agriculture however relatively little research has been conducted on the quantification of social sustainability and the contribution of social issues to the agricultural production efficiency this paper proposes a framework based on state contingent outputs to compute shadow prices of social outputs our methodological approach is based on the directional distance function and illustrated using a farm level dataset from a sample of catalan arable crop farms in 2015 our results indicate that in the sample of 180 farms included in the analysis efficiency scores are relatively high for the three alternative states of the nature considered in our state contingent analysis in addition our findings show that social outputs shadow prices are positive indicating that producing more social outputs is considered as great value to the farm for the efficient farms the social outputs shadow prices are contingent upon on the state of nature in a way that social outputs shadow prices increase with the improvement in crop growth conditions these results have implications in terms of eu farm payment redistribution

socially and environmentally responsible purchasing comparing the impacts on buying firm s financial performance competitiveness and risk abstract the paper presents a study that aims to compare the contribution of social and environmental practices along the purchasing process to economic performance competitiveness and risk mitigation of the buying firm the number of studies dealing with the topic has significantly increased in the last few years the majority of the extant research is focused on the environmental dimension whereas fewer studies have explored the social dimension or the combination of both factors the results are mixed with some scholars supporting the existence of a positive relationship between socially and environmentally oriented purchasing management and financial performance competitiveness and risk mitigation and others being more cautious relying on suggestions from earlier literature the study presents an analysis of a database made up of 189 international buying companies operating in italy and the results have provoked two main observations data were collected through a closed question questionnaire to purchasing managers which was defined from items and variables identified in the previous literature on the one hand the results corroborated the hypotheses of the study confirming that both dimensions contribute to firm performance on the other hand the findings showed that differences do exist and that the positive relationship between social and environmental dimensions and firm performance depends upon the stage into which those criteria are integrated the integration of social criteria has proven to impact only risk mitigation throughout the purchasing process whereas the environmental dimension contributes to risk mitigation and competitiveness when included in the supplier selection phase and to economic performance when considered in supplier relationship management

aggregate production planning for process industries under oligopolistic competition abstract we consider a competitive version of the traditional aggregate production planning model with capacity constraints in the general case multiple products are produced by a few competing producers oligopoly with limited capacities production quantities prices and consequently profits depend on production and allocation decisions of each producer in addition there is competition for the raw material whose supplies are limited and where prices reflect these limitations such situations have recently occurred in several process industry settings including petro refining petrochemicals basic chemicals cement fertilizers pharmaceuticals rubber paper food processing and metals we use a successive bertrand cournot framework to address this problem and to determine optimal production quantities prices and profits at the producers and at the raw material supplier our analysis allows a new way to understand and evaluate the marginal value of additional capacity when there is competition for the market and raw materials

vertical integration variable proportions and successive oligopolies this paper investigates the problem of how the effect of vertical integration upon the final product price is related to the production and or market structures some ambiguous results of the previous models are shown to involve the compound effect of vertical an d horizontal merger this model considers purely vertical integration and shows that the lerner index of monopoly remains unaffected before and after merger vertical integration is shown accordingly to yield an unambiguous decrease in the final product price an increase in consumer welfare implications for antitrust laws are also discussed copyright 1988 by blackwell publishing ltd

captive supplies market conduct and the open market price in this paper i examine the anatomy of the price captive supplies relationship to ascertain if some of the interpretations offered in the empirical literature are defensible gardner s one product two input model is extended to consider a partially integrated oligopsonistic industry the main result is that although the empirical relationship between captive supplies and the price received by independent producers is negative it may or may not be attributed to noncompetitive conduct hence for an econometric model to detect what type of conduct the relationship reflects more structural detail is needed than what so far has been provided in the literature

vertical structure and nash equilibrium a note a frequently cited proposition in industrial organization is that vertical integration of bilateral monopolists improves economic efficiency in the case of fixed proportions production the traditional argument shows that rivalrous firms implementing a stackelberg solution charge a higher price for the final good than they would if they were vertically integrated this paper shows that if rivalrous firms make pricing decisions simultaneously and reach a nash equilibrium instead of the usual stackelberg solution the price of the final good still exceeds that under vertical integration thus the social advantage of cooperation between bilateral monopolists continues to hold under new behavioral assumptions copyright 1991 by blackwell publishing ltd

equilibrium structures in vertical oligopoly abstract the central purpose of this paper is to examine vertical integration as an equilibrium phenomenon we model it as integration between cournot oligopolists in both the upstream and the downstream stages we consider the issue of private profitability versus collective profitability and show that under several situations the equilibrium outcomes may result in a prisoner s dilemma the analysis is extended to consider equilibrium outcomes in a dynamic setting where we find no integration to be a relatively common outcome

international migration non traded goods and economic welfare in the source country a comment abstract labor emigration redistributes income in a two factor two good economy where one good is internationally non traded labor s nominal wage rises as nominal capital payments fall recent research has shown that the prices of non traded goods rise causing society s welfare to decline here the induced change in the real income of each factor is considered separately there is an ambiguity with regard to the real income of non emigrating labor if labor spends a relatively small fraction of income on the non traded good its real income may rise even though society suffers the loss of welfare

measuring environmental efficiency of industry a case study of thermal power generation in india technical and environmental efficiency of some coal fired thermal power plants in india is estimated using a methodology that accounts for firm s efforts to increase the production of good output and reduce pollution with the given resources and technology the methodology used is directional output distance function estimates of firm specific shadow prices of pollutants bad outputs and elasticity of substitution between good and bad outputs are also obtained the technical and environmental inefficiency of a representative firm is estimated as 0 06 implying that the thermal power generating industry in andhra pradesh state of india could increase production of electricity by 6 while decreasing generation of pollution by 6 this result shows that there are incentives or win win opportunities for the firms to voluntarily comply with the environmental regulation it is found that there is a significant variation in marginal cost of pollution abatement or shadow prices of bad outputs across the firms and an increasing marginal cost of pollution abatement with respect to pollution reduction by the firms this result calls for the use of economic instruments like pollution taxes instead of command and control regulation used currently in india to reduce air pollution

sulfur dioxide control in china policy evolution during the 10th and 11th five year plans and lessons for the future china s central government established national goals to reduce sulfur dioxide so2 emissions by 10 in both the 10th and 11th five year plan periods 2001 2005 and 2006 2010 respectively but the early policies were unsuccessful at reducing emissions emissions increased 28 during the 10th five year plan after adapting a number of policies and introducing new instruments during the 11th five year plan so2 emissions declined by 14 we examine the evolution of these policies their interplay with technical and institutional factors and capture lessons from the 11th five year plan to guide future pollution control programs we find that several factors contributed to achievement of the 11th five year plan so2 reduction goal 1 instrument choice 2 political accountability 3 emission verification 4 political support 5 streamlined targets and 6 political and financial incentives the approach integrated multiple policy instruments market based command and control and administrative instruments specific to the chinese context the evolution of so2 reduction policies and programs has implications for further so2 reductions from power plants and other sources as well as control of other atmospheric pollutants such as nitrogen oxides nox and carbon dioxide co2 in china

competition in multiechelon assembly supply chains in this paper we study competition in multiechelon supply chains with an assembly structure firms in the supply chain are grouped into homogenous sectors nodes that contain identical firms with identical production capabilities that all produce exactly one undifferentiated product that may itself be a kit of components each sector may use several inputs to produce its product and these inputs are supplied by different sectors the production process within any sector is taken to be pure assembly in fixed proportions the number of firms in each sector is known the demand curve for the final product is assumed to be linear as are production costs in all sectors competition is modeled via a coordinated successive cournot model in which firms choose production quantities for their downstream market so as to maximize profits given prices for all inputs and all complementary products production quantities for sectors supplying the same successor are coordinated through pricing mechanisms so that complementary products are produced in the right proportions under these assumptions equilibrium prices for any multiechelon assembly network are characterized by a system of linear equations we derive closed form expressions for equilibrium quantities and prices in any two stage system i e a system with multiple input sectors and a single assembly sector we show that any assembly structure can be converted to an equivalent larger structure in which no more than two components are assembled at any node finally large structures can be solved either by direct solution of the characteristic linear equations or through an iterative reduction compression to smaller structures

competition and structure in serial supply chains with deterministic demand supply chains often consist of several tiers with different numbers of firms competing at each tier a major determinant of the structure of supply chains is the cost structure associated with the underlying manufacturing process in this paper we examine the impact of fixed and variable costs on the structure and competitiveness of supply chains with a serial structure and price sensitive linear deterministic demand the entry stage is modeled as a simultaneous game where the players take the outcomes of the subsequent post entry cournot competition into account in making their entry decisions we derive expressions for prices and production quantities as functions of the number of entrants at each tier of a multitier chain we characterize viability and stability of supply chain structures and show using lattice arguments that there is always an equilibrium structure in pure strategies in the entry game finally we examine the effects of vertical integration in the two tier case altogether the paper provides a framework for comparing a variety of supply chain structures and for studying how they are affected by cost structures and by the number of entrants throughout the chain

international migration non traded goods and economic welfare in a two class economy a reply abstract this paper sketches a formal model of an economy producing traded and non traded goods in which two classes of individuals are differentiated each owning different endowments of capital and labor and allocating different proportions of their income to the consumption of each commudity the effects of emigration on prices income distribution and the real income of each class is then examined

rent shifting export subsidies with an imported intermediate product abstract this paper examines the implications of foreign or domestic imperfect competition in intermediate goods supply for strategic trade policy assuming cournot competition an export subsidy aimed at shifting rents from foreign to domestic final good producers may also shift rents to foreign suppliers weakening the incentive for the subsidy however the incentive for a subsidy tends to increase if the intermediate good industry is purely domestic or if the industry is purely foreign but the subsidy reduces the price of the imported input alternative rent shifting policies a production subsidy and an import tariff applied to the input are also considered

on the economics of purpa auctions it is shown that under certain conditions purpa auctions theoretically lead to efficient contracts between utilities and producers of electricity in contrast to normal auctions bidders compete with potentially non linear revenue functions and with non price attributes in practice there are tremendous difficulties in the evaluation of bids which result from the long duration of contracts and from the necessity to evaluate risks and non price attributes