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| Registros recuperados: 18 | |
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| Acuayte Valdés, María del Consuelo. |
| El río San Bernardino presenta un estado completo de contaminación y como consecuencia de la ausencia de agua, el cauce sirve para descargar aguas residuales no tratadas y el depósito de sólidos que se presentan en amontonamiento de basura, llantas, automóviles desvalijados, escombro que como resultado se tiene una pérdida del ecosistema y un foco de infección, siendo esto un problema a la salud de la sociedad. Por tal motivo se realiza una Valorización económica del rescate del río San Bernardino, Texcoco; Estado de México como belleza natural y recurso hídrico, mediante el método de valoración contingente, que estima expresiones de valor por parte de los habitantes entrevistados de las comunidades del río San Bernardino mediante encuestas, el modelo... |
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Palavras-chave: Método de valoración contingente; Disposición a pagar; Disposición a aceptar; Modelo tobit; Contingent valuation method; Willingness to pay; Willingness to accept; Tobit model; Economía; Maestría. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/533 |
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| Acuayte Valdés, María del Consuelo. |
| El río San Bernardino presenta un estado completo de contaminación y como consecuencia de la ausencia de agua, el cauce sirve para descargar aguas residuales no tratadas y el depósito de sólidos que se presentan en amontonamiento de basura, llantas, automóviles desvalijados, escombro que como resultado se tiene una pérdida del ecosistema y un foco de infección, siendo esto un problema a la salud de la sociedad. Por tal motivo se realiza una Valorización económica del rescate del río San Bernardino, Texcoco; Estado de México como belleza natural y recurso hídrico, mediante el método de valoración contingente, que estima expresiones de valor por parte de los habitantes entrevistados de las comunidades del río San Bernardino mediante encuestas, el modelo... |
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Palavras-chave: Método de valoración contingente; Disposición a pagar; Disposición a aceptar; Modelo tobit; Contingent valuation method; Willingness to pay; Willingness to accept; Tobit model; Economía; Maestría. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/533 |
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| Liu, Kang Ernest; Huang, Min-Hsin; Hsu, Jane Lu; Lee, Hwang-Jaw. |
| A highly pathogenic H5N1 strain of avian influenza (AI) has been confirmed in 420 human cases and has caused 257 deaths in the world starting from 2003. Using face-to-face interviews, our data were collected by utilizing a stratified sampling scheme following the distribution of gender and age in three major metropolitan areas in Taiwan, including Taipei, Taichung, and Kaohsiung. The questionnaire was designed to retrieve information including AI knowledge, risk perceptions, and behavioral changes of two types of consumers, primary shoppers and general consumers. In total, 501 primary shoppers and 505 general consumers completed the survey in June 2007 and were recorded for analysis. The empirical results show several interesting findings, especially, that... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Avian influenza; Knowledge; Risk perception; Tobit model; Taiwan; Consumer/Household Economics; Livestock Production/Industries; M30. |
| Ano: 2009 |
URL: http://purl.umn.edu/49297 |
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| Mignouna, D.B.; Mutabazi, K.D.S.; Senkondo, E.M.; Manyong, Victor M.. |
| Declining yields of maize as a result of Striga infestation has necessitated a new technology known as Imazapyr-resistant maize (IRM) to contain the problem. As a result, research and development initiatives with substantial participation of the private sector to transfer this new technology to farmers have been made in western Kenya. This study therefore assesses the adoption of IRM variety and efficiency levels of farmers in western Kenya. A multi-stage sampling technique was used to select a total of 600 households from Nyanza and Western provinces for this study. Tobit model and stochastic production frontier analysis were the analytical methods. Results show that age, education, maize production gap, risk, contact with extension agents, lack of seeds,... |
| Tipo: Journal Article |
Palavras-chave: IRM technology; Efficiency; Stochastic production frontier; Tobit model; Crop Production/Industries. |
| Ano: 2010 |
URL: http://purl.umn.edu/96160 |
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| Lima, Ricardo Chaves; Irmao, Jose Ferreira. |
| The theory of contracts assumes that human nature is essentially opportunistic, and economic agents protect themselves against adverse selection and moral hazard by elaborating contracts. In the case of irrigated areas in the Brazilian northeast, such contracts are not necessarily formal. That is, arrangements based on economic agent’s word are common. The data used are from acerola producers in the Petrolina-Juazeiro irrigation project. The empirical model was tobit, given that the dependent variable was characterized by a truncated distribution. The results showed that the decision to engage on contractual relations is fundamentally defined by the degree of dependence of the farmer in respect to the processing industry. Furthermore, past experience of... |
| Tipo: Journal Article |
Palavras-chave: Vertical coordination; Contracts; Irrigation; Tobit model; Industrial Organization. |
| Ano: 2004 |
URL: http://purl.umn.edu/56813 |
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| Paudel, Pashupati; Shrestha, Arjun Kumar; Matsuoka, Atsushi. |
| Soil fertility is considered as the most important constraint to increase maize production in Nepal. Although farmers generally apply farmyard manure available on their farms, there is increasing trend towards the use of fertilizers that is likely to augment maize production in Nepal. This study was carried out to identify the influence of socio-economic factors of the improved maize adopters on the decision to adopt fertilizers in the Chitwan district of Nepal, using the survey data collected from 117 farm households in May-June 2005. The impact of age, education, family size, farm size, extension service, credit use, manure application, off-farm income and timely irrigation availability on the adoption of fertilizers were analyzed using the Tobit... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Maize; Soil fertility; Food security; Tobit model; International Development. |
| Ano: 2009 |
URL: http://purl.umn.edu/51066 |
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| Chebil, Ali; Nasr, Hafedh; Zaibet, Lokman. |
| This paper analyzed the factors that affect farmers’ willingness to adopt salt-tolerant forage for livestock, using a Tobit model. The data used for the empirical analysis was obtained from a survey of 97 farmers in southeastern Tunisia. The results of this study show that variables related to age, education level, the salinity level of water and membership in a farmers’ association do not significantly influence the degree to which salt-tolerant forage production is adopted. It did, however, find a positive relationship between off-farm income availability and adoption. In addition, the flock size variable, expressed in Standard Livestock Units, has a significant and positive relationship with adoption. This indicates farmers’ need to cover their forage... |
| Tipo: Journal Article |
Palavras-chave: Farmers’ willingness to adopt; Salt-tolerant forage; Tobit model; Tunisia; Crop Production/Industries. |
| Ano: 2009 |
URL: http://purl.umn.edu/56952 |
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| Nkamleu, Guy Blaise; Keho, Yaya; Gockowski, James; David, Soniia. |
| This paper presents empirical evidence to show how socioeconomic factors affect the adoption of and investment in agrochemicals in the cocoa sector of Côte d’Ivoire. The analysis uses primary farm-level data collected in 2002 from a nationally representative sample of more than one thousand cocoa farmers. The study describes the status of the adoption of various chemical inputs and uses a multiplicative heteroscedastic Tobit model to identify and quantify the impact of the socioeconomic environment on the incentive to invest. The results generally show that farmer, household and village characteristics are all important in explaining the farmers’ decisions. The paper concludes by outlining a number of implications for strategic targeting of farmers and... |
| Tipo: Journal Article |
Palavras-chave: Chemical input; Tobit model; Cocoa sector; Socioeconomic factors; Côte d’Ivoire; Crop Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/57015 |
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| Van der Straeten, Bart; Buysse, Jeroen; Marchand, Fleur L.; Lauwers, Ludwig H.; Claeys, Dakerlia; Van Huylenbroeck, Guido. |
| In 2005, 30% of the Flemish farms faced a manure excess, while at aggregated level still 9.7% of the emission rights were unused. This means that, despite the various possibilities, Flemish farmers do not succeed in an effective exchange of manure between farms. In current paper is shown how inorganic fertilizer use influences the use and exchange of organic nitrogen. Because of the mutual interdependency between organic and inorganic nitrogen emission rights (or quota), inorganic nitrogen use limits the emission rights for organic nitrogen. Utilisation of these emission rights are analysed as a trade-offs choice between plant productivity (use of inorganic nitrogen) and manure disposal, as the major abatement alternative of manure production. Farmers... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Manure abatement; Nutrient emission rights; Tobit model; Crop Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/43642 |
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| Registros recuperados: 18 | |
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