assessing the effects of wives earnings on family income inequality we argue that the effect of wives earnings can be assessed meaningfully only by comparing the observed distribution of income with a reference distribution the components of the standard decomposition of the gini coefficient have no implicit reference distribution and therefore should not be interpreted as a measure of the effect of an income source on inequality we suggest several intuitive counterfactual reference distributions and illustrate their use with 1979 and 1989 u s data we conclude that wives earnings reduced inequality in that the income distribution would have been less equal in their absence alternative measures of the impact have mixed results

competition and cooperation in decentralized push and pull assembly systems in this paper we study a decentralized assembly system consisting of a single assembler who buys complementary components from independent suppliers under two contracting schemes push and pull in both schemes the component suppliers are allowed to freely form coalitions or alliances among themselves to better coordinate their pricing or production decisions we show that the sole driver of the inefficiency in a push system which is due to horizontal decentralization of suppliers is the number of alliances that were formed specifically it is shown that in a push system the assembler s profit the total profit of all suppliers and the consumers surplus are all decreasing in the number of coalitions and are thus maximized when the grand coalition is formed we further carry out a stability analysis of coalition structures to verify to what extent suppliers can reduce or eliminate the inefficiency due to their decentralization by forming alliances we show that in a push system with more than two

stability and endogenous formation of inventory transshipment networks this paper studies a cooperative game of inventory transshipment among multiple firms in this game firms first make their inventory decisions independently and then decide collectively how to transship excess inventories to satisfy unmet demands in modeling transshipment we use networks of firms as the primitive which offer a richer representation of relationships among firms by taking the coalitions used in all previous studies as special cases for any given cooperative network we construct a dual price allocation under which the network is stable for any residual demands and supplies in the sense that no firms find it more profitable to form subnetworks under the allocation based on the marginal contribution of each firm to its network called the mjw value we show that various network structures such as complete hub spoke and chain networks are stable only under certain conditions on residual amounts moreover these conditions differ across network structures implying that a network structure plays an important role in establishing the stability of a decentralized transshipment system finally we consider the case when firms establish networks endogenously and show that pairwise nash stable networks underperform the corresponding networks in centralized systems

the impacts of international migration on remaining household members omnibus results from a migration lottery program this brief summarizes the results of a gender impact evaluation study entitled the impacts of international migration on remaining household members omnibus results from a migration lottery program conducted in 2002 in tonga the study observed the impact of migration lottery program on the remaining household members of tongan emigrants on the individual and intra household level income falls rapidly by 22 to 25 percent with a rise in remittances failing to offset a large fall in labor earnings ownership of livestock durable and access to financial services is lower for the remaining household members diets change to be less nutritious and more rice and root crops immigration has a negative impact on household size there is no significant impact of migration on labor supply for men nor women funding for the study derived from the world bank stanford university the waikato management school and mardsen fund

agricultural household models extensions applications and policy this book presents the basic model of an agricultural household that underlies most of the case studies undertaken so far the model assumes that households are price takers and is therefore recursive the decisions modeled include those affecting production and the demand for inputs and those affecting consumption and the supply of labor comparative results on selected elasticities are presented for a number of economies the empirical significance of the approach is demonstrated in a comparison of models that treat production and consumption decisions separately and those in which the decisionmaking process is recursive the book summarizes the implications of agricultural pricing policy for the welfare of farm households marketed surplus the demand for nonagricultural goods and services the rural labor market budget revenues and foreign exchange earnings in addition it is shown that the basic model can be extended in order to explore the effects of government policy on crop composition nutritional status health saving and investment and to provide a more comprehensive analysis of the effects on budget revenues and foreign exchange earnings methodological topics primarily the data requirements of the basic model and its extensions along with aggregation market interaction uncertainty and market imperfections are discussed the most important methodological issues the question of the recursive property of these models is also discussed

remittances and inequality in this paper the authors propose a framework and develop techniques for analyzing the impact of migrant remittances on the distribution of rural income by size and subsequently its impact on rural welfare household data are used to assign numerical coefficients to the impact of net remittances from both internal and international migrants on income inequality in 2 mexican villages the impact of migrant remittances on the distribution of rural income by size depends critically on the degree to which migration opportunities become diffused through the village population on the returns to human capital embodied in remittances and on the distribution of potentially remittance enhancing skills and education across village households our empirical findings demonstrate that in a village where many households contain internal migrants but few have experience migrating to the u s remittances from mexico to us migrants have an unequalizing impact on village incomes while remittances from internal migrants have a favorable effect on the village income distribution by contrast in a village with a long historyh of sending migrants to the us and hence a more ready access to us labor markets us to mexico remittances have an equalizing impact on incomes remittances from internal migrants in this village however embody a large human capital component and are highly correlated with household income hence internal migrant remittances account for a comparatively large share of inequalities in the 2nd village the overall effect of remittances on income inequality is favorable in both villages migration type migration stage and interaction terms all appear to play a role in this context the effects of small changes in remittances upon income inequality and rural welfare in the 2 villages are explored and some implications for migration and rural development policy are considered authors modified

existence of coordinating transshipment prices in a two location inventory model we consider a two location production inventory model where each location makes production decisions and is subject to uncertain capacity each location optimizes its own profits transshipment at a cost is allowed from one location to another we focus on the question of whether one can globally set a pair of coordinating transshipment prices i e payments that each party has to make to the other for the transshipped goods that induce the local decision makers to make inventory and transshipment decisions that are globally optimal a recent paper suggests for a special case of our model that there always exists a unique pair of coordinating transshipment prices we demonstrate through a counterexample that this statement is not correct and derive sufficient and necessary conditions under which it would hold we show that in some conditions coordinating prices may exist for only a narrow range of problem parameters and explore conditions when this can happen finally we study the effects of demand and capacity variability on the magnitude of coordinating transshipment prices

repeated newsvendor game with transshipments under dual allocations abstract we study a repeated newsvendor game with transshipments in every period n retailers face a stochastic demand for an identical product and independently place their inventory orders before demand realization after observing the actual demand each retailer decides how much of her leftover inventory or unsatisfied demand she wants to share with the other retailers residual inventories are then transshipped in order to meet residual demands and dual allocations are used to distribute residual profit unsold inventories are salvaged at the end of the period while in a single shot game retailers in an equilibrium withhold their residuals we show that it is a subgame perfect nash equilibrium for the retailers to share all of the residuals when the discount factor is large enough and the game is repeated infinitely many times we also study asymptotic behavior of the retailers order quantities and discount factors when n is large finally we provide conditions under which a system optimal solution can be achieved in a game with n retailers and develop a contract for achieving a system optimal outcome when these conditions are not satisfied

the delivery and control of quality in supplier producer contracts we model the effect of contract parameters such as price rebates and after sales warranty costs on the choice of quality by a supplier the inspection policy of a producer and the resulting end product quality both noncooperative and cooperative settings are explored the paper s contribution is to highlight the importance of strategic and contractual issues in quality management

a three stage model for a decentralized distribution system of retailers we present and study a three stage model of a decentralized distribution system consisting ofn retailers each of whom faces a stochastic demand for an identical product in the first stage before the demand is realized each retailer independently orders her initial inventory in the second stage after the demand is realized each retailer decides how much of her residual supply demand she wants to share with the other retailers in the third stage residual inventories are transshipped to meet residual demands and an additional profit is allocated our model is an extension of the two stage model of anupindi et al abz 2001 which implicitly assumes that all residuals enter the transshipment stage we show however that allocation rules in the third stage based on dual solutions which were used in the abz model may induce the retailers to hold back some of their residual supply demand in general we study the effect of implementing various allocations rules in the third stage on the values of the residual supply demand the retailers are willing to share with others in the second stage and the trade off involved in achieving an optimal solution for the corresponding centralized system

blood inventory management an overview of theory and practice blood inventory management has attracted significant interest from the operations research profession during the last 15 years a number of methodological contributions have been made in the areas of inventory theory and combinatoric optimization that can be of use to other products or systems these contributions include the development of exact and approximate ordering and issuing policies for an inventory system the analysis of lifo or multi product systems and various forms of distribution scheduling in addition many of these results have been implemented either as decision rules for efficient blood management in a hospital or as decision support systems for hierarchical planning in a regional blood center in this paper we attempt a review of the recent operations research contributions to blood inventory management theory and practice whereas many problems have been solved others remain open and new ones keep being created with advances in medical technology and practices our approach is not to present an exhaustive review of all the literature in the field but rather to address several important issues from a unified perspective of theory and practice and point out new areas for further research

capacity allocation and scheduling in supply chains we consider a multiple product supply chain where a manufacturer receives orders from several distributors if the orders cannot all be met from available production capacity then the manufacturer allocates that capacity and a set of resubmittable orders among the distributors the distributors may share their allocated capacity among themselves before submitting revised orders finally the manufacturer schedules the revised orders to minimize its cost we consider three practical coordination issues first we estimate the benefit to the manufacturer from considering scheduling costs and constraints in making capacity and order allocation decisions second we estimate the additional profit that the distributors achieve when they share their allocated capacity third we estimate the value of coordination between the manufacturer and the distributors our work is among the first to consider all three issues simultaneously we model scheduling costs and constraints within the manufacturer s capacity allocation problem we model the distributors capacity sharing problem as a cooperative game that has properties that are unique within cooperative game theory finally we develop optimal algorithms for all the models defined by the three coordination issues our exact evaluation of decisions about the appropriate coordination level improves managers ability to make those decisions

the shadow value of migrant remittances income and inequality in a household farm economy this article offers econometric evidence that income remittances sent home by family migrants stimulate household farm incomes indirectly by relieving credit and risk constraints on household farm production a high but unequally distributed shadow value of migrant remittances appears to reinforce an equalising direct effect of remittances on the income distribution across a sample of household farms in rural mexico

who benefits from transshipment exogenous vs endogenous wholesale prices this paper studies how transshipments affect manufacturers and retailers considering both exogenous and endogenous wholesale prices for a distribution system where a single manufacturer sells to multiple identical cost retailers we consider both the manufacturer being a price taker and the manufacturer being a price setter in a single period setup under multivariate normal demand distribution in the case of the manufacturer being a price taker we provide several analytical results regarding the effects of key parameters on order quantities and profits in the case of the manufacturer being a price setter we characterize the stackelberg game that arises and provide several insights into how the game dynamics are affected by transshipments specifically we find that risk pooling makes retailers order quantities less sensitive to the wholesale price set by the manufacturer hence in general the manufacturer benefits from retailers transshipments by charging a higher wholesale price while retailers are often worse off the paper captures the effect of demand correlation and the effect of the number of retailers throughout and it illustrates the findings by a numerical example we also provide an interactive web page for numerical experiments

the determinants of nonfarm activities and incomes of rural households in mexico with emphasis on education abstract this paper presents the main results of a study of the effects of education as well as other household assets on the choice of activities and incomes of rural mexican households our study examines the various income sources as well as the education of the household s head and its members implications are drawn for rural education and development policies to promote rural nonfarm incomes and employment

resilience and electricity systems a comparative analysis electricity systems have generally evolved based on the natural resources available locally few metrics exist to compare the security of electricity supply of different countries despite the increasing likelihood of potential shocks to the power system like energy price increases and carbon price regulation this paper seeks to calculate a robust measure of national power system resilience by analysing each step in the process of transformation from raw energy to consumed electricity countries with sizeable deposits of mineral resources are used for comparison because of the need for electricity intensive metals processing we find that shifts in electricity intensive industry can be predicted based on countries power system resilience

the impact of migration on rural poverty and inequality a case study in china large numbers of agricultural labor moved from the countryside to cities after the economic reforms in china migration and remittances play an important role in transforming the structure of rural household income this article examines the impact of rural to urban migration on rural poverty and inequality in a mountainous area of hubei province using the data of a 2002 household survey since migration income is a potential substitute for farm income we present counterfactual scenarios of what rural income poverty and inequality would have been in the absence of migration our results show that by providing alternatives to households with lower marginal labor productivity in agriculture migration leads to an increase in rural income in contrast to many studies that suggest that the increasing share of nonfarm income in total income widens inequality this article offers support for the hypothesis that migration tends to have egalitarian effects on rural income for three reasons 1 migration is rational self selection farmers with higher expected return in agricultural activities and or in local nonfarm activities choose to remain in the countryside while those with higher expected return in urban nonfarm sectors migrate 2 households facing binding constraints of land supply are more likely to migrate 3 poorer households benefit disproportionately from migration

network effects and the dynamics of migration and inequality theory and evidence from mexico international migration is costly and initially only the middle class of the wealth distribution may have both the means and incentives to migrate which can increase inequality in the sending community however the migration networks formed lower the costs for future migrants which can in turn lower inequality this paper shows both theoretically and empirically that wealth has a nonlinear effect on migration and then examines the empirical evidence for an inverse u shaped relationship between emigration and inequality in rural sending communities in mexico after instrumenting we find that the overall impact of migration is to reduce inequality across communities with relatively high levels of past migration we also find some suggestive evidence for an inverse u shaped relationship among communities with a wider range of migration experiences

remittances poverty inequality and welfare evidence from the central plateau of burkina faso abstract this paper applies gini and concentration coefficient decomposition as well as the foster greer thorbecke poverty index and the stark yitzhaki welfare index to new data from four villages in burkina faso to compare the marginal effects of remittances from intercontinental and intra african migration on inequality poverty and social welfare evidence is found that intra african remittances reduce inequality while intercontinental remittances have the opposite effect also it is found that although remittances from intercontinental migration are associated with much lower incidence depth and severity of poverty the marginal impact of remittances from this form of migration on social welfare is limited because recipients do not include the rural poor

accounting for selectivity and duration dependent heterogeneity when estimating the impact of emigration on incomes and poverty in sending areas the impacts of international emigration and remittances on incomes and poverty in sending areas are increasingly studied with household survey data but comparing households with and without emigrants is complicated by a triple selectivity problem first households self select into emigration second in some emigrant households everyone moves while others leave members behind and third some emigrants choose to return to the origin country allowing for duration dependent heterogeneity introduces a fourth form of selectivity one must now worry not just about whether households migrate but also when they do so this paper clearly sets out these selectivity issues and their implications for existing migration studies and then addresses them by using survey data designed specifically to take advantage of a randomized lottery that determines which applicants to the over subscribed samoan quota may immigrate to new zealand the analysis compares incomes and poverty rates among left behind members in households in samoa that sent samoan quota emigrants with those for members of similar households that were unsuccessful in the lottery policy rules control who can accompany the principal migrant providing an instrument to address the second selectivity problem while differences among migrants in which year their ballot was selected allow for estimation of duration effects the authors find that migration reduced poverty among former household members but they also find suggestive evidence that this effect may be short lived as both remittances and agricultural income are negatively related to the duration that the migrant has been abroad

brain drain in globalization a general equilibrium analysis from the sending countries perspective according to the economic literature high skilled emigration may either harm or bene t developing economies recent research highlighted several positive and negative channels through which the brain drain operates this paper aims at evaluating the relative magnitudes of various brain drain channels and quantifying their global impact on migrants sending countries for this purpose we develop a 10 region general equilibrium model of the world economy characterized by overlapping generations dynamics our ndings suggest that the short run impact of brain drain on resident human capital is extremely crucial as it affects not only the number of high skilled workers available to domestic production but also the sending economy s capacity to innovate adopt modern technologies this latter effect is particularly important in globalization where capital investments are made in places with high production ef ciencies hence despite positive feedback effects those countries facing prevalent high skilled emigration are the most candid victims to brain drain

effect of modern rice varieties and irrigation on household income distribution in nepalese villages abstract since high yielding modern rice varieties mvs are adopted only in favorable production environments significant regional productivity differentials have emerged in nepal this study explores the distributional consequences of such differential mv adoption based on an intensive survey of favorable and unfavorable villages we found that mv adoption increased returns to land but decreased family labor earnings from rice production as it facilitated the substitution of hired for family labor as a result the differential mv adoption did not significantly worsen the household income distribution according to the results of the counterfactual gini decomposition analysis

rural nonfarm employment and income diversification in colombia abstract using data for rural households from colombia we find that off farm employment contributes a significant share 45 on average to household income but that the importance of off farm income and returns to household labor vary over the income distribution analysis reveals significant gains from specialization but for households able to specialize no systematic differences in returns to labor between farm and nonfarm sources we conclude that in colombia there is no conflict between development of the farm and the nonfarm sector but that to maximize gains from nonfarm development and reduce the scope for undesirable distributional consequences policies enabling households to specialize might be called for

transshipment and its impact on supply chain members performance this note extends some of the key results of dong and rudi 2004 to general demand distributions this generalization is achieved in two steps first we build on the analysis of dong and rudi to demonstrate that an inventory problem with transshipment is equivalent to a newsvendor problem with an adjusted demand then we study the impact of transshipment by comparing the adjusted demand with the original demand in addition to extending the results in the existing literature this note presents a novel approach for analyzing the impact of risk pooling

cooperation between multiple news vendors with transshipments we study a situation with n retailers each of them facing a news vendor problem i e selling to customers over a finite period of time product with a short life cycle such as fashion groups of retailers might improve their expected joint profit by coordinating their orders followed by transshipments after demand realization is known we analyze these situations by defining a cooperative game called a general news vendor game for such a situation with n retailers we concentrate on whether it makes sense to cooperate by studying properties of general news vendor games our main result states that general news vendor games have non empty cores

the new economics of labor migration this paper reviews selected theoretical and empirical developments in the field of labor migration economics the migration behavior of individuals differs in accordance with their perceived relative deprivation those who are relatively more deprived tend to have stronger incentive to migrate than those who are relatively less deprived moreover a reference group characterized by more income inequality is likely to generate more relative deprivation highly skilled workers are also more likely to migrate migration decisions are often made jointly by the migrant and nonmigrant with a contractual arrangement regarding the sharing of costs and returns the exchange of commitments to share income provides coinsurance of particular interest are the determinants of the speed of adoption of migration as an innovation and the characteristics associated with the delay in the adoption of innovation new econometric techniques including techniques for the analysis of qualitative dependent variables techniques that correct for sample selection bias and those for the analysis of longitudinal data have substantially benefited empirical research in this area new methods that can correct for the biased estimate of the wages particular individuals would receive at 2 or more locations at the same point in time allow researchers to test locational decsion making models estimates of these structural models of labor migration support the hypothesis that individuals respond to income incentives in making the decsion to migrate further research is needed on the pazzling observation that migrant workers earn less than native born workers with similar characteristics during the 1st few years after migration but more thereafter other topics that need further research include the macroeconomic effects of migration the microeconomic and macroeconomic relationships between aging and labor migration and the migration behavior of dual earner families

stable farsighted coalitions in competitive markets in this paper we study dynamic alliance formation among agents in competitive markets we look at n agents selling substitutable products competing in a market in this setting we examine models with deterministic and stochastic demand and we use a two stage approach in stage 1 agents form alliances coalitions and in stage 2 coalitions make decisions price and inventory and compete against one another to analyze the stability of coalition structures in stage 1 we use two notions from cooperative games the largest consistent set lcs and the equilibrium process of coalition formation epcf which allow players to be farsighted thus in forming alliances players consider two key phenomena first players trade off the size of the total profit of the system versus their allocation of this total pie and second they weigh the possibility that an immediate beneficial defection can trigger further counter defections that in the end may prove to be worse than the status quo in particular one such example is that of the grand coalition which we show to be stable in the farsighted sense even though players benefit myopically by defecting from it we also provide conditions under which a situation of a few lone players competing against a large coalition is stable we examine the impact of the size of the market n the degree of competition the effect of cost parameters and the variability of the demand process on the prices inventory levels and structure of the market we discuss the possible strategic implications of our results to firms in a competitive market and for new entrants

on migration and risk in ldcs the authors develop the hypothesis that aversion to risk rather than expectations of higher income is the primary motivation for rural urban migration in developing countries this hypothesis maintains that an optimizing risk averse small farmer family will try to place a family member in the urban sector in order to diversify its income portfolio an additional hypothesis related to risk is also considered at the individual rather than the family level annotation

migration growth distribution and welfare abstract in this note we argue that the inverted u curve of inequality is a technical derivative of the attributes of the conventional indices of inequality that these indices are inadequate measures of the change in welfare associated with the typical distributional consequences of rural to urban migration and that an explicit welfare judgment with respect to this process should and can be made

the impact of the new wave of financial regulation for european energy markets abstract as the financial and physical markets for energy have increasingly become intertwined energy trade is also covered by financial legislation the european commission wishes to strengthen this financial regulation of energy trade it has put forward a set of regulatory proposals aimed at stabilizing financial markets and limiting volatility of energy prices the most noteworthy are emir mad remit and the revised mifid key elements are transparency new trading venues central clearing obligations and mandatory transaction reporting this article evaluates the likely outcomes for energy markets given the new incentives for market parties it argues that although there is no ground to exempt particular energy market participants such as energy companies from financial legislation increased regulation will not necessarily bring about the effects the commission desires the causal link between derivatives trading and volatility of energy prices is not known precisely and many of the economic effects of the proposed legislation are theoretically and empirically ambiguous moreover potentially conflicting instruments and objectives risk policy inconsistency

a strategic model of social and economic networks we study the stability and efficiency of social and economic networks when self interested individuals can form or sever links first for two stylized models we characterize the stable and efficient networks there does not always exist a stable network that is efficient next we show that this tension persists generally to assure that there exists a stable network that is efficient one is forced to allocate resources to nodes that are not responsible for any of the production we characterize one such allocation rule the equal split rule and another rule that arises naturally from bargaining of the players

off farm labor supply and correlated shocks new theoretical insights and evidence from malawi abstractwe offer new conceptual insights into the understanding of occupational choice in uncertain rural environments with a focus on its ex ante before a shock and ex post after a shock consequences for farmers belonging to different portions of the asset distribution we model theoretically the choice between relatively safe subsistence farming higher return but higher risk cash crop activities and off farm labor conditional on preexisting asset allocation and look at the general equilibrium labor market implications of correlated shocks our results backed by evidence from malawi challenge some stylized perceptions in the literature on consumption smoothing via off farm labor supply

disarticulation and human welfare in less developed countries disarticulation refers to the juxtaposition of economic sectors with different levels of development and productivity disarticulation is hypothesized to have a negative effect on social well being net of economic development because it inhibits the spread effects generally thought to be associated with economic growth findings are in accord with this hypothesis although the relationship is complex the strongest effects of disarticulation are found among the poorest nations the concept of disarticulation opens a new and promising avenue of research that may help to resolve contradictory findings of recent research on the political economy of growth

energy management under policy and technology uncertainty energy managers in public agencies are subject to multiple and sometimes conflicting policy objectives regarding cost environmental and security concerns associated with alternative energy technologies making infrastructure investment decisions requires balancing different distributions of risks and benefits that are far from clear for example managers at permanent army installations must incorporate congressional legislative objectives executive orders department of defense directives state laws and regulations local restrictions and multiple stakeholder concerns when undertaking new energy initiatives moreover uncertainty with regard to alternative energy technologies is typically much greater than that associated with traditional technologies both because the technologies themselves are continuously evolving and because the intermittent nature of many renewable technologies makes a certain level of uncertainty irreducible this paper describes a novel stochastic multi attribute analytic approach that allows users to explore different priorities or weighting schemes in combination with uncertainties related to technology performance to illustrate the utility of this approach for understanding conflicting policy or stakeholder perspectives prioritizing the need for more information and making investment decisions we apply this approach to an energy technology decision problem representative of a permanent military base

a small world methodology of analysis of interchange energy networks the european behaviour in the economical crisis abstract european energy policy pursues the objective of a sustainable competitive and reliable supply of energy in 2007 the european commission adopted a proper energy policy for europe supported by several documents and included an action plan to meet the major energy challenges europe has to face a farsighted diversified yearly mix of energies was suggested to countries aiming at increasing security of supply and efficiency but a wide and systemic view of energy interchanges between states was missing in this paper a small world methodology of analysis of interchange energy networks iens is presented with the aim of providing a useful tool for planning sustainable energy policies a proof case is presented to validate the methodology by considering the european ien behaviour in the period of economical crisis this network is approached as a small world net from a modelling point of view by supposing that connections between states are characterised by a probability value depending on economic political relations between countries

inventory sharing and rationing in decentralized dealer networks an increasing number of manufacturers have started to pursue a strategy that promotes inventory sharing among the dealers in their distribution network in this paper we analyze a decentralized dealer network in which each independent dealer is given the flexibility to share his inventory we model inventory sharing as a multiple demand classes problem in which each dealer faces his own customer demand with high priority and inventory sharing requests from other dealers with low priority assuming that each dealer uses a base stock and threshold rationing policy for his inventory stocking and inventory sharing decisions we explicitly model the interactions between the dealers through inventory sharing and obtain aclosed form cost function for each dealer based on the steady state distribution of the inventory levels at the two dealers we then provide a detailed supermodularity analysis of the inventory sharing and inventory rationing game in which each dealer has a two dimensional strategy set stocking level and rationing level we show that the full sharing game in which dealers precommit to sharing all of their on hand inventory and the fixed sharing level game in which dealers precommit to sharing a portion of their on hand inventory are supermodular and thus a pure strategy nash equilibrium is guaranteed to exist for the rationing game in which dealers precommit to their stocking levels we show that there exists a dominant strategy equilibrium on the dealers sharing rationing levels finally a comprehensive computational study is conducted to highlight the impact of the manufacturer s incentives subsidies and or transshipment fees on the dealers sharing behavior

state renewable energy electricity policies an empirical evaluation of effectiveness over the past decade state governments have emerged as us energy policy leaders across the country states are adopting policy instruments aimed at carbon mitigation and renewable energy deployment one of the most prevalent and innovative policy instruments is a renewable portfolio standard rps which seeks to increase the share of renewable energy electrification in the electricity market this analysis evaluates the effectiveness of state energy programs with an empirical investigation of the linkage between state rps policy implementation and the percentage of renewable energy electricity generation across states we use a variant of a standard fixed effects model referred to as a fixed effects vector decomposition with state level data from 1998 to 2006 results indicate that rps implementation is not a significant predictor of the percentage of renewable energy generation out of the total generation mix yet for each additional year that a state has an rps policy they are found to increase the total amount of renewable energy generation these findings reveal a potentially significant shortcoming of rps policies political institutions natural resource endowments deregulation gross state product per capita electricity use per person electricity price and the presence of regional rps policies are also found to be significantly related to renewable energy deployment

income distribution in rice growing villages during the post green revolution periods the philippine case 1985 and 1998 this paper aims to examine changes in household income sources and its impact on household income distribution in the post green revolution periods in 1985 and 1998 in the rural philippines we found that there has been a structural shift of household income away from farm in favor of nonfarm labor income sources this finding indicates that rural development is being led by nonfarm sectors such a shift has resulted in an increase in household income inequality as the distribution of nonfarm income has become less equal over time and was markedly more unequal than that of farm income in 1998

demographic transition family structure and income inequality we treat each age specific income earning member of the family as an income source and use the source specific gini decomposition approach as well as the lorenz comparison approach to study the

immigration and inequality immigration is often viewed as a proximate cause of the rising wage gap between highand low skilled workers nevertheless there is controversy over the appropriate theoretical and empirical framework for measuring the presumed effect and over the precise magnitudes involved this paper offers an overview and synthesis of existing knowledge on the relationship between immigration and inequality focusing on evidence from cross city comparisons in the u s while some researchers have claimed that a cross city research design is inherently flawed i argue that the evidence from cross city comparisons is remarkably consistent with recent findings based on aggregate time series data in particular cross city and aggregate time series comparisons provide support for three key conclusions 1 workers with below high school education are perfect substitutes for those with a high school education 2 high school equivalent and college equivalent workers are imperfect substitutes with an elasticity of substitution on the order of 2 3 within education groups immigrants and natives are imperfect substitutes together these results imply that the average impacts of recent immigrant inflows on the relative wages of u s natives are small the effects on overall wage inequality including natives and immigrants are larger reflecting the concentration of immigrants in the tails of the skill distribution and higher residual inequality among immigrants than natives even so immigration accounts for a small share 5 of the increase in u s wage inequality between 1980 and 2000

transshipment of inventories among retailers myopic vs farsighted stability the author considers a model of a decentralized distribution system consisting of n retailers selling an identical product retailers face a stochastic demand and must order their initial inventory before this demand is realized after demand realization retailers decide how much of their unsold inventory or unsatisfied demand they want to share with other retailers this is followed by a transshipment of leftover inventories and distribution of the additional profit generated through inventory sharing the author addresses the following issue suppose that the retailers distribute the profit from inventory sharing according to an allocation rule that induces retailers to share their residuals in a way that maximizes the additional profit such as the shapley value but may not belong to the core is it likely that in this framework all retailers will jointly share their residuals and not form subcoalitions previous research has looked at this problem from a myopic viewpoint and concluded that the grand coalition is not stable unlike the prior work the author looks at stability in a farsighted sense that is retailers do not consider only their immediate payoffs but are also concerned with reactions of other retailers to their actions in a symmetric setting with identical additional unit revenues from transshipments generated by all retailers farsighted retailers always maximize their allocations by not defecting from the grand coalition the author also provides conditions when the same is true for nonidentical additional unit revenues