the effect of unions on productivity u s surface mining of coal the purpose of this paper is to compare the abilities of two competing analytical techniques mathematical programming and statistical regression to shed light on the union nonunion productivity differential in u s surface coal mining the programming approach has the virtues of being nonparametric and thus extremely flexible and of being able to provide a decomposition of productivity differentials into three components differences in technical efficiency differences in scale efficiency and differences in congestion identification of these three components provides an aid to management in its search for the sources of and remedies for productivity gaps the econometric approach on the other hand is neither flexible nor does it provide such a decomposition its chief virtue lies in the fact that being stochastic it allows for the presence of noise and measurement error that plagues most if not all empirical data thus the two approaches have complementary virtues the two techniques are used to investigate productivity in two samples of u s surface coal mines the programming approach finds a large and significant positive union nonunion productivity differential this differential is due primarily to greater congestion occurring in the smaller nonunion mines in one sample and to scale inefficiency in the smaller nonunion mines in the other sample the econometric analysis finds nearly the same union nonunion productivity differential but sheds no light on the composition of and thus the cure for the differential

unions in a general equilibrium model of firm formation unions are introduced into a general equilibrium model of firm formation i find under reasonable conditions that large firms are more likely to be unionized and that unionized firms are more productive and better managed than nonunion firms of the same size as well unions reduce economic efficiency by distorting the occupation choice decision between managing a firm and working in one perhaps surprisingly this distortion persists even when individual union contracts set both wages and employment in a fully efficient manner but can disappear when the mechanism that allocates property rights to union jobs is changed in certain ways

market price behavior of wholesale electricity products texas abstract applying a regression based approach to a newly developed sample of over 60 000 hourly observations for 01 01 2011 12 30 2017 we answer the question what moves the day ahead market dam prices for energy and ancillary services as and the real time market rtm price for energy in the electric reliability council of texas ercot our answer comprises the following findings that capture the interdependence of ercot s energy and as products 1 the dam energy price increases with the day ahead forecasts of natural gas price system load and as requirements but declines with nuclear and wind generation s forecasts 2 the as prices increase with the dam energy price and the as procurement forecasts but decline with the as offer forecasts and 3 the rtm energy price increases with the dam energy price but diverges from the dam energy price due to forecasting errors related to the dam energy price s fundamental drivers these findings imply that texas can reduce the prices for day ahead energy day ahead as and real time energy via wind generation development and demand side management further texas can improve its electricity trading efficiency by improving ercot s forecast accuracy to narrow the rtm energy price s divergence from the dam energy price

do farmers benefit from participating in specialty markets and cooperatives the case of coffee marketing in costa rica1 historically low prices in the conventional coffee market have caused financial and social hardship among coffee farmers in the face of this crisis specialty markets have attracted the attention of the international donor community these market segments have shown consistent growth over the last decade and exhibit price premiums in international markets therefore if higher prices are passed on to farmers access to specialty markets could help to alleviate the crisis brought on by low prices in the conventional sector the present study attempts to identify the factors that determine farmers participation in specialized markets and whether participation in these markets leads to higher prices for farmers a two stage model is used to analyze farmers marketing decisions and their effect on the prices received this procedure allows us to control for the endogeneity bias introduced by the marketing choice our results indicate that farmers participating in the specialty coffee segment do in fact receive higher prices than those participating in conventional channels additionally we find that participation in cooperatives has a positive impact on the probability that a farmer chooses to grow specialty coffee and analogously on the prices that they receive based on these results it seems that efforts to increase participation in the specialty coffee segment and in cooperatives would help to lessen some of the hardships brought on by low prices in the conventional coffee sector

smallholder dairying under transactions costs in east africa abstract it is argued that dairying is vital to future viability of many small farms in east africa and that high transactions costs for dairy production and marketing limit participation by asset and information poor smallholders case studies from kenya and ethiopia illustrate the role of dairy cooperatives in reducing transactions costs analysis of the determinants of producer prices received by a sample of dairy producers near addis ababa suggests that different levels of access to infrastructure assets and information explain why they contemporaneously accept widely different producer prices for fluid milk

a review of efforts to restructure texas electricity market abstract comparisons suggest that texas has been relatively successful in its efforts to introduce greater competition and customer choice into its unique electricity market center for advancement of electricity markets 2002 yet texas has defied many of the common prescriptions in designing its market texas has yet to establish a nodal congestion management system that directly assigns local congestion costs to entities responsible for creating transmission congestion a liquid power exchange or spot market is absent programs designed to encourage demand side responsiveness had a slow start market concentration remains high market oversight activities are poorly funded a generation adequacy mechanism or planning reserve margin requirement remains under debate has texas simply been lucky in averting any real disasters or are these market features less important than commonly recognized this article reviews the restructuring initiative and reports some key lessons learned following the first twenty months under the new wholesale market structure and fifteen months of retail competition

cooperative membership and dairy performance among smallholders in ethiopia this study assesses the impact of cooperative membership among dairy producers in selale ethiopia we selected ten impact indicators proportion of dairy income to total household income total dairy income proportion of crossbreed cows to the total number of cows in the herd indicator of technological innovation amount of feed bought another indicator of technological innovation milk production milk productivity commercialization price per liter of milk price per kg of butter and the share of milk production that is processed at the household level in order to minimize the biases that may arise by simply comparing members and non members we employed a propensity score matching technique the empirical analysis shows that cooperatives are strong in facilitating technological transformations and commercialization but weak in offering better prices these findings suggest structural trade offs between different domains of cooperatives action overall our study concludes that cooperatives can be efficient business institutions to foster rural development and food security

exploring double side selling in cooperatives case study of four coffee cooperatives in rwanda apart from the difficulty to attract new members leakage of sales outside the cooperative is a major challenge for the coffee cooperatives in rwanda local independent traders still constitute a major market for coffee producers yet cooperatives also accept the produce from non members and pay them the same price our objective in this paper is to analyse the importance of this phenomenon of double side selling we collected data from a sample of 170 coffee farmers we use a probit model to analyse characteristics linked to cooperative membership and to study double side selling we describe the trade relationships between farmers and the cooperative on the one hand and between farmers and traders on the other by the attributes of transaction costs involved in the trade of coffee membership characteristics include easy access to labour land tenure risk aversion and mutual trust between farmers and cooperatives management preference to sell to traders can be explained by the trust farmers seem to have in them after the repeated transactions in credit and basic consumption items and by long term relationships in the community

common property institutions and sustainable governance of resources abstract the literature on common property based resource management comprises many important studies that seek to specify the conditions under which groups of users will self organize and sustainably govern resources upon which they depend using three of the more comprehensive such studies and with an extensive review of writings on the commons this paper demonstrates that the enterprise of generating lists of conditions under which commons are governed sustainably is a flawed and impossibly costly research task for a way out the paper examines the relative merits of statistical comparative and case study approaches to studying the commons it ends with a plea for careful research design and sample selection construction of causal mechanisms and a shift toward comparative and statistical rather than single case analyses such steps are necessary for a coherent empirically relevant theory of the commons

decoupling standards from practice the impact of in house certifications on coffee farms environmental and social conduct in this paper we investigate whether coffee farms that have been granted in house socio environmental certification from a global buyer display better social and environmental conduct compared to non certified farms we perform an econometric analysis using data from an original cross country survey covering 575 farms in various regions of brazil colombia costa rica guatemala and mexico we find that farms that have been granted in house certification demonstrate better environmental but not better social conduct than non certified farms we find also that the positive relationship between in house certification and environmental conduct is stronger if the farm sells to a cooperative and if it is located in an institutionally weak country finally we find that the institutional strength of the farm s home country has a positive influence on its social conduct we discuss how our analysis contributes to the literature on the social and environmental impacts of certifications and to scholarship in global value chains social and environmental upgrading

new institutional arrangements for rural development the case of local woolgrowers associations in the transkei area south africa until recently smallholder farmers in the transkei area had very limited access to a profitable market outlet for their wool in response the south african wool industry built shearing sheds managed by a local association that sells directly to the brokers this article investigates the effect of joint wool marketing through the shearing shed on the farmers revenue from wool a three step regression model of the revenue from wool indicates that the farmers selling through the shearing shed obtain better financial results as compared to those who use alternative channels this analysis shows how new institutional arrangements may contribute to economic development

the effect of unionization on productivity evidence from a long panel of coal mines the author measures the effect of unionization on productivity based on a panel of west virginia coal mines from 1897 to 1928 output and inputs are measured in physical terms and most of the mine

fair trade organic coffee rural livelihoods and the agrarian question southern mexican coffee families in transition summary we use a random sample of coffee producing households in southern mexico to compare opportunities associated with government subsidies and migration to the role of fair trade organic coffee in household livelihoods although land and labor returns among fair trade organic coffee growers are higher than for conventional growers differences in yields are more important than price premiums moreover investment in education and labor opportunities outside coffee dominate those in fair trade organic coffee the results highlight the value of an integrated approach to the agrarian question that improves productivity and prices and supports other pathways for improving incomes

farmers marketing preferences in local coffee markets evidence from a choice experiment in ethiopia this study investigates transactions in the local coffee markets in ethiopia while the ethiopian commodity exchange which was established in 2008 introduced regulatory institutional and organizational innovations in the coffee market informal norms and conventions remain the primary institutions governing transactions in the local markets based on a choice experiment we found that for coffee farmers the characteristics of the traders are more important than the price offered when anchoring their transactions into personal relationships this can be explained as the institutional response of farsighted calculative farmers to poorly organized coffee markets and to lacking credit and insurance markets contrary to the concept of embeddedness which claims that economic transactions are embedded into social relationships social relationships are observed to be embedded into economic relationships one of the perverse effects of these personal relationship based transactions is that farmers are insufficiently incentivized to maintain and improve coffee quality

american policy conflict in the greenhouse divergent trends in federal regional state and local green energy and climate change policy climate change threatens significant impacts on global ecosystems and human populations to address this challenge industrialized nations have ratified the kyoto protocol and undertaken commitments to reduce emissions of greenhouse gases the primary agents linked to anthropogenic alteration of earth s climate by contrast the us government led by the bush administration has rejected mandatory targets for curbing emissions under the protocol and has instead pursued voluntary mitigation measures amid a larger push for clean coal and next generation nuclear technologies these actions in total have fueled global perceptions that the us is not acting in substantial ways to address climate change nevertheless action within the us is indeed moving forward with states cities and regional partnerships filling the federal leadership vacuum this paper reviews the diverse policies strategies and cooperative frameworks that have emerged at regional state and local levels to guide climate protection and identifies the environmental and economic benefits linked to such programs the paper also attempts to explain the existing federal impasse on climate policy with attention given to how sub national efforts may ultimately obviate national governmental inaction r 2007 elsevier ltd all rights reserved

a two step econometric estimation of covariates of side selling the case of coffee cooperatives in southwest ethiopia despite their apparent economic benefit to smallholder farmers cooperatives are vulnerable to the problem of side selling using cross sectional household data and cragg s regression model we ide

has electric utility restructuring led to lower electricity prices for residential consumers in texas this paper analyzes the determination of residential electricity prices in the competitive electric reliability council of texas ercot market this analysis suggests that electricity restructuring in texas has not yet resulted in lower prices for the majority of residential energy consumers in areas open to competition contrary to common expectations residential electricity costs for consumers at a typical 1000 kwh per month consumption level have increased at a greater rate in the areas of texas offering retail choice than in the areas of the state where retail competition has not been introduced

are union productivity effects overestimated evidence from coal mining the empirical literature of the influence of unions on productivity is extended by considering the effect in an industry with heterogeneous firms recent theoretical papers suggest that in such an industry unions will tend to organize the exogenously more productive firms thus a spurious correlation between unions and productivity may emerge we test this hypothesis by estimating production functions for coal with data from eastern kentucky underground coal mines the aspect of mine heterogeneity that we focus on is the width of the mine s seam of coal wider seams increase productivity empirically we find that unions disproportionately organize mines with wider seams and this accounts for the positive relationship between unions and productivity observed in our data in fact once seam thickness is accounted for the estimated effect of unions on productivity is negative

did the expiration of retail price caps affect prices in the restructured texas electricity market on january 1 2007 the electric reliability council of texas ercot market became the first restructured market in the us to completely remove caps on the prices which could be charged to residential energy consumers by the retailers associated with the traditional or incumbent utility service providers our analysis suggests that the expiration of the price to beat ptb price caps may have led to a reduction in the average prices charged by competitive retail electric providers reps

social desirability opportunism and actual support for farmers market organisations in ethiopia one of the striking issues in the literature on farmers market organisations fmos is that farmers generally report quite positive opinions regarding the services of their fmo while at the same

unionized construction workers are more productive this paper presents evidence on the effect of unionism on productivity in construction the linkages are distinct from those studied previously in industrial settings apprenticeship training and hiring halls probably raise union productivity while jurisdictional disputes and restrictive work rules lower it using brown and medoff s methodology union productivity measured by value added per employee is 44 to 52 percent higher than nonunion the estimate declines to 17 to 22 percent when estimates of interarea construction price differences are used to deflate value added occupational mix differences and possibly apprenticeship training account for 15 to 27 percent of this difference

collective action for smallholder market access abstract the opportunity for smallholders to raise their incomes increasingly depends on their ability to compete in the market yet there are many failures in rural markets in developing countries that make it difficult for them to do this understanding how collective action can help address the inefficiencies coordination problems or barriers to market access is particularly important this paper draws on the case studies in this special issue and on other literature to examine the conceptual issues and empirical evidence on the role of collective action institutions in improving market access for the rural poor applying insights from studies of collective action in natural resource management the paper examines what conditions facilitate effective producer organizations for smallholders market access with special attention to the characteristics of user groups institutional arrangements types of products staples perishables and other commodities markets local domestic and international and external environment the paper also identifies policies and interventions that facilitate collective action for market access among smallholders and examines whether the public sector private sector and or civil society is best positioned to provide such interventions

the future of small farms new directions for services institutions and intermediation summary efficient pre and post harvest services are essential if small farms in high potential areas are to intensify production contribute to economic growth and reduce poverty they also matter if small farms in marginal areas are to manage their natural resource base in the face of growing population pressure and climate change difficulties that smallholders face in accessing services are reviewed showing how incentives for commercial delivery of services to smallholders differ between staple food traditional cash crop and high value product supply chains the major challenge in service delivery to smallholders in much of africa concerns coordination of service development and delivery different forms of intermediary institution for achieving such coordination are examined

changing asset endowments and smallholder participation in higher value markets evidence from certified coffee producers in nicaragua this paper examines the capacities of smallholders in nicaragua to exploit new linkages to certified coffee markets following the coffee crisis data on livelihood assets were collected from 292 households which were clustered to test how differences in outcomes asset building reflect variations in initial asset endowments the results suggest that most households built particular elements of their asset base and increased their resilience to future shocks however households struggled to make effective use of the gains for intensifying their livelihoods of the least endowed households few made investments in the scale or productivity of coffee and most continued to depend heavily on subsistence production and seasonal off farm income for survival in conclusion improved market access alone even under relatively favorable market conditions and with considerable external support will have uncertain impacts on rural poverty if the underlying constraints on household assets and investments are not addressed concurrently