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Adopción de tecnología de distribución y control del agua en las Comunidades de Regantes de la Región de Murcia AgEcon
Alcon, Francisco; De Miguel, María Dolores; Burton, Michael P..
RESUMEN: En el presente trabajo se estudia el proceso de adopción de tecnología de distribución y control de agua que las Comunidades de Regantes de la Región de Murcia han llevado a cabo desde el año 1975 hasta 2005. Se analiza el tiempo que transcurre desde que se constituye la Comunidad de Regantes hasta que toma la decisión de adoptar utilizando Análisis de Duración. Se identifican como aceleradores del proceso de adopción la posesión de un pozo de apoyo, el empleo de un sistema tarifario variable en función del consumo, los efectos de las políticas de subvenciones a las obras de modernización y mejora de los regadíos y las sequías. SUMMARY: The present paper analyses the process of adopting water management and control technology in the irrigation...
Tipo: Journal Article Palavras-chave: Análisis de duración; Comunidad de regantes; Función de riesgo; Tecnología de riego; Irrigation community; Hazard function; Irrigation technology; Duration analysis; Agribusiness; Research and Development/Tech Change/Emerging Technologies; Q16; Q25; D71.
Ano: 2008 URL: http://purl.umn.edu/37190
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ASYMMETRY IN RAW MILK SAFETY PERCEPTIONS AND INFORMATION: IMPLICATIONS FOR RISK IN FRESH PRODUCE MARKETING AND POLICY AgEcon
Knutson, Ronald D.; Currier, Russell W.; Ribera, Luis A.; Goeringer, L. Paul.
Scientific evidence clearly indicates that consumption of raw milk carries substantial disease-inducing health risks. While federal U.S. policy mandates that milk moving in interstate commerce be pasteurized; within 41 of 50 states, raw milk can be obtained for consumption. Warning labels notwithstanding, a segment of U.S. consumers pays higher prices for higher-risk raw milk than for either organic or conventional milk. The behavioral factors leading to raw milk consumption are explored. The paternalistic regulatory options for reducing the risk associated with drinking raw milk are identified. Implications for fresh produce sold directly from farms to consumers or through farmers markets are drawn.
Tipo: Conference Paper or Presentation Palavras-chave: Raw milk; Pasteurization; Health risks; Behavioral economics; Bounded rationality; Paternalistic regulations; Public health; HACCP; GLOBALG.A.P.; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; A12; A13; A14; D11; D18; D46; D71; D78; D82; I18; K23; K32; Q11; Q18.
Ano: 2010 URL: http://purl.umn.edu/116440
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Coalitional Matchings AgEcon
Dimitrov, Dinko; Lazarova, Emiliya A..
A coalitional matching is a two-sided matching problem in which agents on each side of the market may form coalitions such as student groups and research teams who - when matched - form universities. We assume that each researcher has preferences over the research teams he would like to work in and over the student groups he would like to teach to. Correspondingly, each student has preferences over the groups of students he wants to study with and over the teams of researchers he would like to learn from. In this setup, we examine how the existence of core stable partitions on the distinct market sides, the restriction of agents’ preferences over groups to strict orderings, and the extent to which individual preferences respect common rankings shape the...
Tipo: Working or Discussion Paper Palavras-chave: Coalitions; Common Rankings; Core; Stability; Totally Balanced Games; Two-Sided Matchings; C78; J41; D71.
Ano: 2008 URL: http://purl.umn.edu/37523
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Computational Complexity in Additive Hedonic Games AgEcon
Sung, Shao Chin; Dimitrov, Dinko.
We investigate the computational complexity of several decision problems in hedonic coalition formation games and demonstrate that attaining stability in such games remains NP-hard even when they are additive. Precisely, we prove that when either core stability or strict core stability is under consideration, the existence problem of a stable coalition structure is NP-hard in the strong sense. Furthermore, the corresponding decision problems with respect to the existence of a Nash stable coalition structure and of an individually stable coalition structure turn out to be NP-complete in the strong sense.
Tipo: Working or Discussion Paper Palavras-chave: Additive Preferences; Coalition Formation; Computational Complexity; Hedonic Games; NP-hard; NP-complete; Research Methods/ Statistical Methods; C63; C70; C71; D02; D70; D71.
Ano: 2008 URL: http://purl.umn.edu/46655
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Examining Collective Action among Mieso Agropastoralists of Eastern Ethiopia AgEcon
Beyene, Fekadu; Hagedorn, Konrad.
An increasing scarcity of water for crop farming and livestock watering among agropastoralists of Mieso in Eastern Ethiopia has largely disrupted their livelihoods. Indigenous water well maintenance and government initiated rainwater harvesting are two important collective actions common among these communities. With the aim of examining collective action institutions in both cases, we collected data from different stakeholders and individual members. Theoretically, low level of physical assets (action resource) limits participation of an individual in collective action. In our case, other factors such as environmental uncertainty and lower level of dependence on the resource have been found to be more significant in limiting membership than limitation of...
Tipo: Conference Paper or Presentation Palavras-chave: Collective Action; Agropastoralists; Institutions; Poverty; Institutional and Behavioral Economics; D71; Z13.
Ano: 2006 URL: http://purl.umn.edu/25797
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Gender, Agricultural Commercialization, and Collective Action in Kenya AgEcon
Fischer, Elisabeth; Qaim, Matin.
With the commercialization of agriculture, women are increasingly disadvantaged because of persistent gender-disparities in access to productive resources. Farmer collective action that intends to improve smallholder access to markets and technology could potentially accelerate this trend. Here, we use survey data of small-scale banana producers in Kenya to investigate the gender implications of recently established farmer groups. Traditionally, banana has been a women’s crop in Kenya. Our results confirm that the groups contribute to increasing male control over banana. While male control over banana revenues does not affect household food security, it has a negative marginal effect on dietary quality. We demonstrate that the negative gender implications...
Tipo: Working Paper Palavras-chave: Gender; Collective action; Market access; Agricultural technology; Household food security and nutrition; Kenya; Community/Rural/Urban Development; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Institutional and Behavioral Economics; International Development; Research and Development/Tech Change/Emerging Technologies; D71; J16; O12; O13; O31; Q13.
Ano: 2012 URL: http://purl.umn.edu/121229
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Group versus Individual Liability: Long Term Evidence from Philippine Microcredit Lending Groups AgEcon
Gine, Xavier; Karlan, Dean S..
Group liability in microcredit purports to improve repayment rates through peer screening, monitoring, and enforcement. However, it may create excessive pressure, and discourage reliable clients from borrowing. Two randomized trials tested the overall effect, as well as specific mechanisms. The first removed group liability from pre-existing groups and the second randomly assigned villages to either group or individual liability loans. In both, groups still held weekly meetings. We find no increase in default and larger groups after three years in pre-existing areas, and no change in default but fewer groups created after two years in the expansion areas.
Tipo: Working or Discussion Paper Palavras-chave: Microfinance; Group lending; Group liability; Joint liability; Social capital; Microenterprises; Informal economies; Access to finance; Consumer/Household Economics; Financial Economics; Institutional and Behavioral Economics; International Development; C93; D71; D82; D91; G21; O12; O16; O17.
Ano: 2009 URL: http://purl.umn.edu/50951
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Group versus Individual Liability: Long Term Evidence from Philippine Microcredit Lending Groups AgEcon
Gine, Xavier; Karlan, Dean.
Group liability in microcredit purports to improve repayment rates through peer screening, monitoring, and enforcement. However, it may create excessive pressure, and discourage reliable clients from borrowing. Two randomized trials tested the overall effect, as well as specific mechanisms. The first removed group liability from pre-existing groups and the second randomly assigned villages to either group or individual liability loans. In both, groups still held weekly meetings. We find no increase in default and larger groups after three years in pre-existing areas, and no change in default but fewer groups created after two years in the expansion areas.
Tipo: Working Paper Palavras-chave: Microfinance; Group lending; Group liability; Joint liability; Social capital; Micro-enterprises; Informal economies; Access to finance; Consumer/Household Economics; Financial Economics; Institutional and Behavioral Economics; International Development; C93; D71; D82; D91; G21; O12; O16; O17.
Ano: 2009 URL: http://purl.umn.edu/229136
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Landscape Clubs: Co-existence of GM and Organic Crops AgEcon
Furtan, William Hartley; Guzel, A.; Weseen, A.S..
The possibility of increased production of genetically modified (GM) crops in agriculture accentuates the need to examine the feasibility of GM and non-GM technologies coexisting on a common physical landscape. Using the theory of clubs, this paper examines the possibility of coexistence for GM and organic wheat technologies through the formation of an organic club with an endogenously determined buffer zone. Given the available data on prices, yields, and rotations, it is shown that a club can be created in which GM and organic agricultural production technologies can economically co-exist in the same physical landscape. Specifically, co-existence results in an increase in economic welfare over a situation where only GM technology is used but is not...
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; D71; Q16.
Ano: 2005 URL: http://purl.umn.edu/24495
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Like Oil and Water or Chocolate and Peanut Butter? Ethnic Diversity and Social Participation of Young People in England AgEcon
Fumagalli, Elena; Fumagalli, Laura.
The paper studies the impact of ethnic diversity on social participation of young people. We first propose a theoretical model in which the agents choose between structured and unstructured social activities by taking into account the ethnic composition of the groups they join. We test our predictions using English census data together with the `Longitudinal Survey of Young People in England' (LSYPE) and we find that ethnic segregation increases the probability of hanging around near home, while ethnic fractionalization decreases it. Furthermore, more structured activities are not affected by ethnic fractionalization. Finally, we use an IV strategy based on both historical and geographical data to correct for endogenous sorting into neighborhoods. The...
Tipo: Working or Discussion Paper Palavras-chave: Social Participation; Fractionalization; Segregation; Community/Rural/Urban Development; C25; D71; J15.
Ano: 2009 URL: http://purl.umn.edu/55293
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Many-to-One Matching when Colleagues Matter AgEcon
Revilla, Pablo.
This paper studies many-to-one matching market in which each agent’s preferences not only depend on the institution that hires her, but also on the group of her colleagues, which are matched to the same institution. With an unrestricted domain of preferences the non-emptiness of the core is not guaranteed. Under certain conditions on agents’ preferences, we show that two possible situations in which, at least, one stable allocation exists, emerge. The first condition, called Group Togetherness, reflects real-life situations in which agents are more concerned about an acceptable set of colleagues than about the firm hiring them. The second one, Common Best Colleague, refers to markets in which a workers’ ranking is accepted by workers and firms present...
Tipo: Working or Discussion Paper Palavras-chave: Many-to-one matching; Hedonic; Coalitions; Stability; Colleagues; Marketing; C78; D71.
Ano: 2007 URL: http://purl.umn.edu/7443
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Multiple Membership and Federal Sructures AgEcon
Le Breton, Michel; Makarov, Valery; Savvateev, Alexei; Weber, Shlomo.
We consider a model of the “world" with several regions that may create a unified entity or be partitioned into several unions (countries). The regions have distinct preferences over policies chosen in the country to which they belong and equally share the cost of public policies. It is known that stable \political maps" or country partitions, that do not admit a threat of secession by any group of regions, may fail to exist. To rectify this problem, in line with the recent trend for an increased autonomy and various regional arrangements, we consider federal structures, where a region can simultaneously be a part of several unions. We show that, under very general conditions, there always exists a stable federal structure.
Tipo: Working or Discussion Paper Palavras-chave: Partitions; Federal Structures; Stability; Cooperative Games; C71; D71; H41.
Ano: 2008 URL: http://purl.umn.edu/37519
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Non-bossy Social Classification AgEcon
Dimitrov, Dinko; Puppe, Clemens.
We consider the problem of how societies should be partitioned into classes if individuals express their views about who should be put with whom in the same class. A non-bossiness condition makes the social aggregator dependent only on those cells of the individual partitions the society members classify themselves in. This information is used to construct for each profile of views an opinion graph. By means of natural sovereignty and liberalism requirements, we characterize the non-bossy aggregators generating partitions in which the social classes are refinements of the connected components in the opinion graph.
Tipo: Working or Discussion Paper Palavras-chave: Social Aggregation; Group Identity; Liberalism; Non-bossiness; Research and Development/Tech Change/Emerging Technologies; D71.
Ano: 2009 URL: http://purl.umn.edu/55328
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PEER-EFFECTS IN OBESITY AMONG PUBLIC SCHOOL CHILDREN: A GRADE-LEVEL ANALYSIS AgEcon
Asirvatham, Jebaraj; Nayga, Rodolfo M., Jr.; Thomsen, Michael R..
We examine the role of peer effects in childhood obesity outcomes by investigating whether obesity rates among the highest graders in a public school has an effect on obesity rates among younger grades. We use a panel dataset with obesity prevalence measured at the grade level. Our data are from Arkansas public schools. Results provide evidence that changes in the obesity prevalence at the highest grade are associated with changes in obesity prevalence at younger grades. The magnitude of the peer effect depends on the type of school, and we find statistically significant peer effects in both elementary and high schools but not in middle schools. These effects are also larger in high schools than in elementary schools. We use falsification tests to provide...
Tipo: Presentation Palavras-chave: Peer-effects; Obesity; Childhood obesity; Overweight; Food Consumption/Nutrition/Food Safety; D10; D71; I10; Z13.
Ano: 2012 URL: http://purl.umn.edu/122732
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Political Mergers as Coalition Formation AgEcon
Weese, Eric.
Political coalition formation games can describe the formation and dissolution of nations, as well as the creation of coalition governments, the establishment of political parties, and other similar phenomena. These games have been studied from a theoretical perspective, but the resulting models have not been used extensively in empirical work. This paper presents a method of estimating political coalition formation models with many-player coalitions, and then illustrates this method by estimating structural coefficients that describe the behaviour of municipalities during a recent set of municipal mergers in Japan. The method enables counterfactual analysis, which in the Japanese case shows that the national government could increase welfare via a...
Tipo: Working or Discussion Paper Palavras-chave: C63; D71; H77; Political Economy; Public Economics; Computational techniques; Coalitions; Municipalities.
Ano: 2011 URL: http://purl.umn.edu/107268
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Producer's choice of certification AgEcon
Langinier, Corinne; Babcock, Bruce A..
Consumers are in general less informed than producers about the quality of agricultural goods. To reduce the information gap, consumers can rely on standards (labels, certifications, geographic indications) that insure quality and origin of the goods. However, these standards do not always fully reveal information. Some of them may just signal that the good is more likely to be of high quality. We investigate what kind of standards are most desirable for producers, and for society in general knowing that any system is costly to implement. One of our findings is that for intermediate values of certification costs, certification that fully reveals information makes high quality producers better off, but make the entire industry worse off. In this case, the...
Tipo: Conference Paper or Presentation Palavras-chave: Asymmetric information; Certification; Clubs; Quality.; Consumer/Household Economics; L11; L15; D82; D71.
Ano: 2005 URL: http://purl.umn.edu/19510
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Reallocating Water: An Application of Sequential Sharing Rules to Cyprus AgEcon
Ansink, Erik; Marchiori, Carmen.
We present an axiomatic approach to the reallocation of water rights among economic sectors. Reallocation may be appropriate when the current schedule of water allocation is considered unfair. Our proposed approach is based on the combination of initial water rights, sectors' claims to water, and an exogenous ordering of these sectors. We apply sharing rules, based on bankruptcy rules, to reallocate water, which complements other approaches to the reallocation of water rights, including those based on water markets. Our approach is illustrated using an application to water reallocation in Cyprus, where reallocation of water rights has been recognised as an essential step towards good water governance and one of the main challenges for current water policies.
Tipo: Working or Discussion Paper Palavras-chave: Water Reallocation; Sequential Sharing Rule; Water Scarcity; Axiomatic Approach; Cyprus; Environmental Economics and Policy; D63; D71; Q25.
Ano: 2009 URL: http://purl.umn.edu/56222
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Religious Organizations AgEcon
Levy, Gilat; Razin, Ronny.
We propose a model of religious organizations which relies on the ability of such organizations and personal utility shocks. We show how religious organizations arise endogenously and characterize their features. Specifically, we find that members of the religious organization share similar beliefs and are more likely to cooperate with one another in social interactions. We identify a "spiritual" as well as a "material" payoff for members of the religious organization. Our results explain and shed light on empirical phenomena such as the effects of secularization and economic development on religious beliefs and participation, the relation between the size of the religion and the intensity of its members’ beliefs, religious segregation and religious...
Tipo: Working or Discussion Paper Palavras-chave: Economics of Religion; Religion; Organizations; Beliefs; Labor and Human Capital; L30; D71.
Ano: 2010 URL: http://purl.umn.edu/90904
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Smallholder Farmers and Collective Action: What Determines the Intensity of Participation? AgEcon
Fischer, Elisabeth; Qaim, Matin.
Collective action has become an important strategy for smallholders in developing countries to remain competitive in rapidly changing markets. However, within farmer groups, the commitment of individual members can vary, as the expected net benefits are not the same for all individuals, and opportunities to free-ride exist. Since the benefits of collective action emerge primarily through the exploitation of economies of scale, low participation rates in joint activities may put a serious threat to the success and viability of farmer groups. This article investigates determinants of smallholder participation intensity and free-riding, using the example of banana groups in Kenya. The results suggest that family labor availability and previous benefits that...
Tipo: Working or Discussion Paper Palavras-chave: Collective action; Participation intensity; Smallholder farmers; Kenya; Community/Rural/Urban Development; Institutional and Behavioral Economics; International Development; D23; D71; O13; Q13.
Ano: 2011 URL: http://purl.umn.edu/108551
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Social Norms and Behavior in the Local Commons Through the Lens of Field Experiments AgEcon
Cardenas, Juan-Camilo.
Behavior in the local commons is usually embedded in a context of regulations and social norms that the group of users face. Such norms and rules affect how individuals value material and non-material incentives and therefore determine their decision to cooperate or over extract the resources from the common-pool. This paper discusses the importance of social norms in shaping behavior in the commons through the lens of experiments, and in particular experiments conducted in the field with people that usually face these social dilemmas in their daily life. Through a large sample of experimental sessions with around one thousand people between villagers and students, I test some hypothesis about behavior in the commons when regulations and social norms...
Tipo: Working or Discussion Paper Palavras-chave: Social norms; Regulations; Cooperation; Collective action; Common-pool resources; Experimental economics; Field experiments.; Public Economics; D71; Q0; Q2; C9; H3; H4.
Ano: 2009 URL: http://purl.umn.edu/91168
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