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	Provedor de dados AgEcon (9) Colegio de Postgraduados (2) Autor Golub, Benjamin (2) Jackson, Matthew O. (2) López Toxqui, María Guadalupe (2) Ayele, Gezahegn (1) Buhai, I. Sebastian (1) Chuhay, Roman (1) Davis, Kristin E. (1) Franz, Silvio (1) Heizler, Odelia (1) Kimhi, Ayal (1) Marsili, Matteo (1) Negash, Martha (1) Patacchini, Eleonora (1) Pin, Paolo (1) Spielman, David J. (1) Tanimura, Emily (1) Van der Leij, Marco J. (1) Zenou, Yves (1) Mais... Palavra-chave Social Networks (11) D85 (5) Z13 (4) D83 (3) Diffusion (3) Homophily (3) Institutional and Behavioral Economics (3) A14 (2) Community/Rural/Urban Development (2) Doctorado (2) EDAR (2) Environmental Economics and Policy (2) Estructura migratoria (2) Labor and Human Capital (2) Learning (2) Migración (2) Migration (2) Migratory structure (2) Networks (2) Random Graphs (2) Mais... Tipo do documento Working or Discussion Paper (8) Article (1) Ano 2011 (1) 2010 (5) 2009 (1) 2008 (3) 2007 (1) País United States (9) Mexico (2) Idioma Inglês (9) Espanhol (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 11 Primeira ... 1 ... Última Las redes sociales y migratorias, un acercamiento al fenómeno migratorio de Perote, Veracruz y Guadalupe Victoria, Puebla. Colegio de Postgraduados López Toxqui, María Guadalupe. La migración de mexicanos hacia los Estados Unidos se incrementó en los años 2000 a 2006 en 37.29%, favoreciendo las remesas que para el 2008 fueron de 23,978.99 millones de dólares, el estado con mayor monto fue Michoacán con 2,263.55 millones de dólares y Veracruz recibió 1,473.9. El objetivo fue caracterizar la migración de los municipios de Perote Veracruz y Guadalupe Victoria, Puebla. El enfoque metodológico fueron las redes sociales. Los resultados muestran que los migrantes tenían una actividad productiva en las comunidades expulsoras, es decir, la migración no es la falta de oportunidades si no el bajo ingreso que percibían, también que las remesas son para gastos familiares y que a excepción de la construcción de casas, no se destinan para la... Palavras-chave: Migración; Red Social; Remesas; Estructura migratoria; Migration; Social Networks; Remittances; Migratory structure; Doctorado; EDAR; Desarrollo agrícola regional. Ano: 2010 URL: http://hdl.handle.net/10521/91 Las redes sociales y migratorias, un acercamiento al fenómeno migratorio de Perote, Veracruz y Guadalupe Victoria, Puebla. Colegio de Postgraduados López Toxqui, María Guadalupe. La migración de mexicanos hacia los Estados Unidos se incrementó en los años 2000 a 2006 en 37.29%, favoreciendo las remesas que para el 2008 fueron de 23,978.99 millones de dólares, el estado con mayor monto fue Michoacán con 2,263.55 millones de dólares y Veracruz recibió 1,473.9. El objetivo fue caracterizar la migración de los municipios de Perote Veracruz y Guadalupe Victoria, Puebla. El enfoque metodológico fueron las redes sociales. Los resultados muestran que los migrantes tenían una actividad productiva en las comunidades expulsoras, es decir, la migración no es la falta de oportunidades si no el bajo ingreso que percibían, también que las remesas son para gastos familiares y que a excepción de la construcción de casas, no se destinan para la... Palavras-chave: Migración; Red Social; Remesas; Estructura migratoria; Migration; Social Networks; Remittances; Migratory structure; Doctorado; EDAR; Estrategias para el Desarrollo agrícola regional. Ano: 2010 URL: http://hdl.handle.net/10521/91 Diffusion of Innovations on Community Based Small Worlds: the Role of Correlation between Social Spheres AgEcon Tanimura, Emily. Which types of networks favor the diffusion of innovations in the sense that an innovation whose intrinsic benefits are greater than those of an established choice will be able to replace the latter when it is initially used only by a small fraction of a large population? For deterministic and regular networks there are characterizations, based on a coordination game model of the diffusion of innovations. Here we study this question for a class of irregular random networks, Small world networks, which are of interest as more realistic models of social networks. We consider a random graph model based on a community structure, in which the choice of a parameter allows us to obtain as special cases several well known models, in particular Watts' Small world.... Tipo: Working or Discussion Paper Palavras-chave: Diffusion of innovations; Small World Networks; Contagion Threshold; Community Structure; Social Networks; Environmental Economics and Policy; D85. Ano: 2010 URL: http://purl.umn.edu/96842 How Homophily Affects Learning and Diffusion in Networks AgEcon Golub, Benjamin; Jackson, Matthew O.. We examine how three different communication processes operating through social networks are affected by homophily - the tendency of individuals to associate with others similar to themselves. Homophily has no effect if messages are broadcast or sent via shortest paths; only connection density matters. In contrast, homophily substantially slows learning based on repeated averaging of neighbors' information and Markovian diffusion processes such as the Google random surfer model. Indeed, the latter processes are strongly affected by homophily but completely independent of connection density, provided this density exceeds a low threshold. We obtain these results by establishing new results on the spectra of large random graphs and relating the spectra to... Tipo: Working or Discussion Paper Palavras-chave: Networks; Learning; Diffusion; Homophily; Friendships; Social Networks; Random Graphs; Mixing Time; Convergence; Speed of Learning; Speed of Convergence; Institutional and Behavioral Economics; D83; D85; I21; J15; Z13. Ano: 2009 URL: http://purl.umn.edu/50718 Opportunity and Choice in Social Networks AgEcon Pin, Paolo; Franz, Silvio; Marsili, Matteo. Our societies are heterogeneous in many dimensions such as census, education, religion, ethnic and cultural composition. The links between individuals - e.g. by friendship, marriage or collaboration - are not evenly distributed, but rather tend to be concentrated within the same group. This phenomenon, called imbreeding homophily, has been related to either (social) preference for links with own--type individuals ( choice-based homophily) or to the prevalence of individuals of her same type in the choice set of an individual ( opportunity-based homophily). We propose an indicator to distinguish between these effects for minority groups. This is based on the observation that, in environments with unbiased opportunities, as the relative size of the minority... Tipo: Working or Discussion Paper Palavras-chave: Social Networks; Choice-Based and Opportunity-Based Homophily; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy; D85; J11; J12. Ano: 2008 URL: http://purl.umn.edu/6232 Rural Innovation Systems and Networks: Findings from a Study of Ethiopian Smallholders AgEcon Spielman, David J.; Davis, Kristin E.; Negash, Martha; Ayele, Gezahegn. Agriculture in Ethiopia is changing. New players, relationships, and policies are influencing how smallholders access and use information and knowledge. Although this growing complexity suggests opportunities for Ethiopian smallholders, too little is known about how these opportunities can be effectively leveraged to promote pro-poor processes of rural innovation. This paper examines Ethiopia’s smallholder agricultural sector to provide qualitative insights into the interactions between smallholders and other actors in the agricultural sector and the contribution those interactions make to the smallholders’ innovation processes. Case studies of smallholder innovation networks in 10 communities suggest that public sector extension and administration exert a... Tipo: Working or Discussion Paper Palavras-chave: Ethiopia; Agricultural Development; Innovation; Technology; Social Networks; Social Learning; Community/Rural/Urban Development; Research and Development/Tech Change/Emerging Technologies. Ano: 2008 URL: http://purl.umn.edu/42332 Marketing via Friends: Strategic Diffusion of Information in Social Networks with Homophily AgEcon Chuhay, Roman. The paper studies the impact of homophily on the optimal strategies of a monopolist, whose marketing campaign of new product relies on a word of mouth communication. Homophily is a tendency of people to interact more with those who are similar to them. In the model there are two types of consumers embedded into a social network, which differ in friendship preferences and desirable design of product. Consumers can learn about the product directly from an advertisement or from their neighbors. The monopolist chooses the product design and price to influence a pattern of communication among consumers. We find a number of results: (i) for low levels of homophily the product attractive to both types of consumers is preferred to specialized products; (ii) the... Tipo: Working or Discussion Paper Palavras-chave: Networks; Word of Mouth; Viral Marketing; Homophily; Diffusion; Social Networks; Random Graphs; Monopoly; Pricing Strategy; Product Design; Marketing; Advertisement; Environmental Economics and Policy; D21; D42; D60; D83; L11; L12. Ano: 2010 URL: http://purl.umn.edu/96667 Does Family Composition Affect Social Networking? AgEcon Heizler, Odelia; Kimhi, Ayal. This paper analyzes the effect of family composition, and in particular the number of children, the age gap between the oldest and youngest child and the age of the youngest child, on parents’ involvement in social networks. The predictions of a simple theoretical model are confirmed by an empirical analysis of Israeli Social Survey data for 2002- 2006. The number of children has a U -shaped effect on parents' involvement in social networks, with substantial differences between fathers and mothers. The negative effect is dominant on the mothers’ involvement in social networks, while the positive effect is dominant on the father's involvement in social networks. The age gap between children has a positive effect on both parents’ involvement in social... Tipo: Article Palavras-chave: Social Networks; Family Composition; Children.; Community/Rural/Urban Development. Ano: 2011 URL: http://purl.umn.edu/121698 Juvenile Delinquency and Conformism AgEcon Patacchini, Eleonora; Zenou, Yves. This paper studies whether conformism behavior affects individual outcomes in crime. We present a social network model of peer effects with ex-ante heterogeneous agents and show how conformism and deterrence affect criminal activities. We then bring the model to the data by using a very detailed dataset of adolescent friendship networks. A novel social network-based empirical strategy allows us to identify peer effects for different types of crimes. We find that conformity plays an important role for all crimes, especially for petty crimes. This suggests that, for juvenile crime, an effective policy should not only be measured by the possible crime reduction it implies but also by the group interactions it engenders. Tipo: Working or Discussion Paper Palavras-chave: Social Networks; Linear-in-means Model; Spatial Autoregressive Model; Social Norms; Labor and Human Capital; A14; C21; D85; K42; Z13. Ano: 2010 URL: http://purl.umn.edu/90945 A Social Network Analysis of Occupational Segregation AgEcon Van der Leij, Marco J.; Buhai, I. Sebastian. We develop a social network model of occupational segregation between different social groups, generated by the existence of positive inbreeding bias among individuals from the same group. If network referrals are important for job search, then expected homophily in the contact network structure induces different career choices for individuals from different social groups. This further translates into stable occupational segregation equilibria in the labor market. We derive the conditions for wage and unemployment inequality in the segregation equilibria and characterize first and second best social welfare optima. Surprisingly, we find that socially optimal policies involve segregation. Tipo: Working or Discussion Paper Palavras-chave: Social Networks; Homophily; Inbreeding Bias; Occupational Segregation; Labor Market Inequality; Social Welfare; Institutional and Behavioral Economics; Labor and Human Capital; J24; J31; J70; Z13. Ano: 2008 URL: http://purl.umn.edu/6224 Naive Learning in Social Networks: Convergence, Influence and Wisdom of Crowds AgEcon Jackson, Matthew O.; Golub, Benjamin; Jackson, Matthew O.. We study learning and influence in a setting where agents communicate according to an arbitrary social network and naively update their beliefs by repeatedly taking weighted averages of their neighbors' opinions. A focus is on conditions under which beliefs of all agents in large societies converge to the truth, despite their naive updating. We show that this happens if and only if the influence of the most influential agent in the society is vanishing as the society grows. Using simple examples, we identify two main obstructions which can prevent this. By ruling out these obstructions, we provide general structural conditions on the social network that are sufficient for convergence to truth. In addition, we show how social influence changes when some... Tipo: Working or Discussion Paper Palavras-chave: Social Networks; Learning; Diffusion; Bounded Rationality; Institutional and Behavioral Economics; D85; D83; A14; L14; Z13. Ano: 2007 URL: http://purl.umn.edu/9101 Registros recuperados: 11 Primeira ... 1 ... Última

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