Programa de Pós-graduação em Agronegócio
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Item Análise da concentração e expansão da produção e do beneficiamento do milho-pipoca (Zea mays L. var. everta (Sturtev.) L. H. Bailey) no Brasil(Universidade Federal de Goiás, 2022-02-23) Bertolucci, Murilo Fernandes; Cunha, Cleyzer Adrian da; http://lattes.cnpq.br/8809108474226649; Cunha, Cleyzer Adrian da; Wander, Alcido Elenor; Godoi, Cintia NevesO objetivo do presente estudo foi averiguar a concentração e expansão da produção e beneficiamento do milho-pipoca (Zea mays L. var. everta (Sturtev.) L. H. Bailey) no Brasil. O modelo utilizado foi o ECD (Modelo Estrutura, Conduta, Desempenho) e os índices analisados foram o HHI (Herfindahl-Hirschman Index) e o CR4 (Razão de concentração das 4 maiores empresas). Para mensurar o tamanho do mercado e seus agentes nos mais diversos elos foram realizadas entrevistas com os agentes dos elos de interesse da pesquisa. Os dados secundários utilizados para determinar a competitividade da cadeia foram volume e o preço das sementes de milho-pipoca importadas e dos grãos do cereal exportados e importados no período, além de dados do Registro Nacional de Cultivares (RNC) para demonstrar o incremento no número de novos cultivares disponíveis. Os resultados revelaram que há concentração de mercado tanto no elo fornecedor de sementes quanto no elo indústria processadora e que devido a maior especificidade de ativos, esta é maior no elo dos fornecedores de sementes. Concluiu-se também que a cadeia produtiva é competitiva tanto em nível nacional quanto internacional.Item Integração e transmissão de preços no mercado internacional de algodão(Universidade Federal de Goiás, 2016-02-29) Caixeta, Ana Caroline Dias; Cunha, Cleyzer Adrian da; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4776010Y2; Cunha, Cleyzer Adrian da; Godoi, Cintia Neves; Wander, Alcido ElenorThe aim of this study was to analyze the integration of prices in the Brazilian and international market cotton considering transaction costs . For this purpose we analyzed the CEPEA and NYBOT indices, representing the national and international market cotton, respectively, from January 2000 to December 2014. With the methodology Model Correction Vector Error with Threshold (TVEC) with two regimes. The first regime corresponded to the cotton price changes in the short term, which represented 5,6% of the sample. In the second scheme, which corresponded to 60,1 % of the sample are the deviations that are influenced by short- and long -term changes . The results showed a significant presence of transaction costs in both schemes, which negatively affects the price transmission process, hindering the integration of prices in the cotton market.Item Análise da transmissão assimétrica de preços no mercado de leite em Goiás de 2005 a 2013(Universidade Federal de Goiás, 2014-05-12) Carvalhaes, Gracielle Couto; Scalco, Paulo Roberto; Cunha, Cleyzer Adrian da; http://lattes.cnpq.br/8809108474226649; Cunha, Cleyzer Adrian da; Leão, Carlos; Silva Neto, Waldemiro Alcântara daConsidering the importance of the State of Goias in the national dairy market and the rise of Brazil on the world stage production of milk , this study started from the analysis of the milk market in Goias considering the stages of production , processing and marketing , in order to analyze the behavior agents of the milk production chain in Goias (producer , wholesale and retail ) in order to verify that the price adjustment is asymmetric in that supply chain , as well as , the variations in increases in prices are transmitted with greater speed and a greater magnitude than the decrease . Thus, for conducting this study, it was necessary to use theoretical models that could support the use of econometric models , these in turn helped in quantifying the impacts caused prices will change , in order to support the specific objective of the work , which sought to examine the relationship between the prices of milk production chain by estimating models and calculating sales margins . Overall the results indicate that the adjustment of prices to market milk in Goias is asymmetric, being attacked the main agent responsible for this failure.Item A lógica da ação coletiva para os condomínios de armazéns rurais(Universidade Federal de Goiás, 2020-07-21) Filippi, Amanda Cristina Gaban; Guarnieri, Patricia; http://lattes.cnpq.br/7909091619260597; Cunha, Cleyzer Adrian da; http://lattes.cnpq.br/8809108474226649; Cunha, Cleyzer Adrian da; Souza, Cleonice Borges de; Wander, Alcido Elenor; Carvalho, José Márcio; Costa Filho, Bento Alves daThis thesis analyzed the Rural Warehouse Condominiums as a new model of Rural Collective Action in the light of the Collective Action Logic theory. For this purpose, it was carried out an applied, descriptive, exploratory and qualitative-quantitative research through semi-structured interviews and survey. The data analysis was performed through Content Analysis, Statistical Analysis and Multiple Correspondence Analysis. The results show an approximation of the rural model Condominiums of Rural Warehouses with the Theory of Logic of Collective Action, mainly for small groups. This fact occurs since individual objectives under collective action are more easily achieved and more efficient, promoting advantages for the individual, for the business and the production chain. In small groups, economic objectives, cohesion and efficiency, control and agility of actions, collective benefit, social incentives, results and the promotion of individual interest are more satisfactory and, thereis no presence of freeriders. Also, we highlight the viability of the warehouse structure managed collectively, strengthening and greate refficiency of rural business and producers, insertion and integration in a competitive market environment, economic and social benefits, costreduction, and, increase in profit. Related to the economic, social and logistical determinants, it can be pointed out the commercialization of the product, logistical gains, and the union of the producers regarding the development and growth of rural collective action. Finally, the quantitative analysis indicates the main motivating factors for the Rural Warehouse Condominium model through Social, Logistic, Political, Economic, Management and Collective Action Logic variables. The variable of Collective Action Logic resulted in a higher load for the dimensions and a greater number of determining variables, being decisive: (i) Smaller Collective Actions are easier to promote collective interest; (ii) rural producers act in common to promote interests; (iii) in a small collective group, individual efforts will influence results more; and, (iv) the smaller the collective group, the closer the individual, easier will be the achieviement of collective benefits. The correlations show stronger relationships between costreduction with freight and costreduction with transport (0,833); and, between the lack of financinglines for small and medium producers and the lack of financinglines for agricultural warehouse (0,741). As contributions to this thesis, the dissemination of the rural collective action model Rural Warehouse Condominium is exemplified, integration of research with the Theory of Logic of Collective Action, inputs for decision making, and contribution to the literature.Item Aspectos socioeconômicos na tomada de decisão de operações de troca de milho, soja e insumos: o caso de revendas no Centro-Oeste(Universidade Federal de Goiás, 2016-01-22) Johann, Adriane Regina Garippe; Cunha, Cleyzer Adrian da; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4776010Y2; Cunha, Cleyzer Adrian da; Godoi, Cintia Neves; Figueiredo, Reginaldo SantanaBarter are negotiations based on commodity exchange, addressing the most primitive trades, barter. With the growth of barter, in agribusiness, agricultural dealers out of this marketing mode, may lose competitiveness against its competitors. At the same time has a competitive advantage of opportunity, their use for agricultural resale, can be limited by several existing ways. The aim of this study was to analyze the socioeconomic perspectives that can determine or not the use of barter transactions in agricultural dealers, the states of Goiás and Mato Grosso. To meet the objective of this study, a survey was conducted using a questionnaire using the "Survey Monkey" tool with closed questions. We used the binary logistic regression model, which studies the probability of an event that presents a dichotomous qualitative way, based on the behavior of explanatory variables. In general, all variables were statistically insignificant, with only a significant explanatory variable in the estimation of the binary logistic regression model. It sought to empirical evidence, analyzing the answers of the respondents of agricultural resales of the analyzed region. Also made it possible to analyze the functioning of the barter operations within these agricultural dealers, the risks involved with the use of these operations, the mitigation strategies of these risks, and what are the future intentions for the use of barter. Keywords: Barter. Agricultural resellers. Midwest. Risk management.Item Análise dos contratos de integração entre produtores de arroz e a agroindústria Wanbao no perímetro irrigado do rio Limpopo em Moçambique(Universidade Federal de Goiás, 2019-06-07) Ndava, Alex Orlando; Cunha, Cleyzer Adrian da; http://lattes.cnpq.br/8809108474226649; Cunha, Cleyzer Adrian da; Wander, Alcido Elenor; Hellmeister Filho, PauloThe study analyzed the integration contracts established between rice producers and Wanbao agroindustry in the irrigated perimeter of the Limpopo river in Mozambique. The analysis model was based on the New Institutional Economy, focusing on the Economics of Transaction Costs. Exploratory-descriptive research was carried out with a qualitative approach and field research. Data collection was carried out based on three semi-structured interview scripts to an intentional sample of one hundred and thirty-four producers integrated by Wanbao, a mediation company RBL, E.P. and to the integrator Wanbao, the latter did not agree to grant an interview. The results point to the existence of formal contracts with neoclassical characteristics, recurrent transactions, aspects of flexibility and hybrid governance structure. The production chain of rice produced in the irrigated perimeter of the Limpopo River is predominantly dominated by the Wanbao agroindustry, which focuses on the main activities of the production process, leaving to rural producers activities such as transplantation and maintenance of the crop. The contractual relationship in the production of rice leads to the predominance of highly specific assets, which increase the degree of exposure to risk, which shows Wanbao's interest in internalizing the transactions. Access to land for production within the irrigated perimeter, machinery and equipment provided by Wanbao, technology and the guarantee of access to the market are the advantages reported by producers in the contractual relationship. Thus, it is clear that the contracts reflect the attributes of the transactions between the producers and the integrator, but they are not totally minimizers of the transaction costs for the producer link due to the imprisonment of these to a single supplier that is the integrating agroindustry, which does not always offer the best market conditions, claiming adequate quality for the final product that is rice. The flexibility aspects hidden in the contract contribute to the existence of information asymmetry mainly in the producer link, since it is part of the ex-ante contract. The institutional environment is related to the development of infrastructures, agricultural machinery and inputs, inclusion of producers, internal commercialization, local cultural valorization, supply of equipment, inputs for production, transfer of technology, provision of services and provision of rice for consumption.Item Análise de governança das transações e canais de distribuição na cadeia produtiva do tomate de mesa: o caso dos produtores de Goianápolis – GO(Universidade Federal de Goiás, 2019-03-12) Pereira, José Wellington Abreu; Cunha, Cleyzer Adrian da; http://lattes.cnpq.br/8809108474226649; Cunha, Cleyzer Adrian da; Wander, Alcido Elenor; Tete, Marcelo FerreiraTomato production in Brazil, stands out for its important contribution to the gross domestic product (GDP) of agriculture in the country. This crop is distinguished into two groups or segments (industrial tomato and table tomato) that give rise to productive chains with different processes and paths to your final consumption point. Table tomato stands out for its nutritional importance and to be a part of the diet of many Brazilians, It is characterized by being a highly perishable product, so the producers use central supply S/A (CEASA) to market their production. The transactions carried out in this market, have as characteristic, a large number of intermediaries, who have a higher level of market information in relation to the producer, allowing opportunistic behavior attitudes. Through the relevance of the theme, the research has as general objective, to analyze the governance of the transactions and the distribution channels used by the producers of the table tomato of Goianápolis – GO. As for the approach, it is characterized as a quali-quantitative research. Field research was conducted with a descriptive purpose. As for the research objectives, it was exploratory, as to the means, the case study was chosen as a methodology. The data set consisted of secondary and primary data; these were collected through a questionnaire to collect them in 04 groups of variables, being: profile of the producer and the productive undertaking; characteristics of production and commercialization; transaction costs, and; distribution channels. 33 tomato producers were interviewed in the period from September to November 2018. The results showed that the average producer's time in activity is between 10 and 20 years. In relation to land, 63.6% used leased land, these lands, mostly (39.4%), had an area between 1.1 and 5 hectares. About the producers who had resorted to bank loans was 6.1%, however, other 93.9% no contracted bank loans, however bought inputs on credit in the agricultural stores. The target markets of this production is the CEASA - GO (69.7%) and intermediate (30.3%). The point that was considered more positive in those markets was the ease of access to the buyer, and the more negative it is the risk of default. Transactions are characterized by the SPOT market. There is no kind of contract on sale transaction. The frequency attribute is considered relatively low average, asset specificity was perceived in the product analyzed. The great challenge of commercialization, was the price swings. The existing distribution channels in the segment searched occurs in up to four levels (considering the producer as the first level), already the most used channel was the three levels and the main reason for the choice was the ease of access. The data showed that 66.7% who pays for the cost of transportation, is the producer, denoting greater bargaining power by the intermediary.Item Perdas de alimentos na CEASA-GO à luz da teoria das ações coletivas(Universidade Federal de Goiás, 2023-10-09) Rezende, Maryele Lázara; Cunha, Cleyzer Adrian da; http://lattes.cnpq.br/8809108474226649; Cunha, Cleyzer Adrian da; Calil, Francine Neves; Rosalem, Vagner; Wander, Alcido Elenor; Dias, Marco Antonio HarmsThe food losses in the different stages of the production chain led to a reduction in the volume of food available to the population, generating significant social, economic and environmental consequences. CEASA-GO, along with other warehouses in Brazil, faces challenges related to food losses, which results in local problems, such as the accumulation of waste to be discarded, the attraction of waste pickers and economic loss for farmers and entrepreneurs who work in the warehouse. In this sense, this doctoral dissertation aims to evaluate the food losses that occur in CEASA-GO in the light of the theory of collective actions. Therefore, this thesis was structured in three articles that address the specific results of this work. The first article entitled "Food losses: bibliometric analysis" explores the literature on food losses through bibliometric analysis in the Web of Science and Scopus databases, and reveals that studies on food losses are relatively recent and that countries such as the USA and the European Union have taken the lead in research. In the qualitative analysis of the articles, the existence of eight categories of research on the subject was verified, namely: cause and prevention of losses; loss estimation; environmental impact; Packaging; logistics; food recovery; donation and conceptual aspects. In the second article entitled "Food losses and collective actions in CEASA-GO: an application of the logit model", the objective was to map the losses that occur in CEASA-GO through the application of structured questionnaires, analyzed in the logit model, and to evaluate whether the sociodemographic and behavioral differences of CEASA-GO users impact on the adoption of loss reduction strategies, It was found that younger traders, making donations to the food bank and participating in collective actions positively influenced these groups to adopt strategies to reduce food losses. The third article of this thesis "Collective actions and food losses: an analysis of CEASA-GO" sought to verify if there are collective actions in CEASA GO and if these cooperate with the reduction of food losses, for this purpose semi-structured interviews were conducted with associates and cooperative members of the two collective actions identified in the warehouse. These collective actions did not have as their initial objective to solve the problem of losses in the warehouse, but began to adopt strategies to reduce losses in the search for economic benefits or resolution of operational problems of the warehouse. The main activities developed by the collective actions to reduce food losses were the creation of the food bank, access to institutional marketing channels and maintenance of shared and refrigerated space to store goods. In a general analysis of the results of this thesis it is possible to affirm that collective actions contribute positively to the reduction of losses in CEASA-GO, since it is a joint action of agents that would not find strength and organization when carried out in individual and uncoordinated activities. The loss reduction actions developed by the collective actions contribute to an integral sustainable development by addressing actions that promote economic, social and environmental development to the agents that work in the warehouse and to CEASA-GO itself. Finally, this thesis contributes to studies on food losses by evaluating a link little explored in the literature. This research also contributes to the theory of collective actions by applying it in the context of agribusiness and evidencing that, for this analysis, large groups can perform more efficiently supported by online and fast communication. This study has practical relevance, providing a list of potential actions to reduce the generic losses in CEASA-GO.Item Análise das margens de comercialização e transmissão de preços do suco de laranja no estado de São Paulo no período de 01/2014 a 05/2020(Universidade Federal de Goiás, 2021-02-23) Santana, Bruno de Melo; Cunha, Cleyzer Adrian da; http://lattes.cnpq.br/8809108474226649; Cunha, Cleyzer Adrian da; Wander, Alcido Elenor; Oliveira Neto, Odilon José deThe objective of this study was to verify de commercialization margins between the producer and the cytrus industry and the existence or not of ATP (asymmetry on price transmission). The methodologies used were absolute and relative commercialization margins and time series of econometrics based, done with unit root tests, granger causality and cointegration and historical decomposition of the variance. The results revealed that the industries added the highest commercialization margins, averaging 72% in all juices and by-products. The symmetry model in prices transmission showed that the transmission of prices from the producer to the juices happens symmetrically.Item Desempenho das exportações goianas do complexo soja para os principais parceiros comerciais: uma aplicação do modelo gravitacional(Universidade Federal de Goiás, 2023-02-27) Silva, Frederico Teodoro da; Cunha, Cleyzer Adrian da; http://lattes.cnpq.br/8809108474226649; Cunha, Cleyzer Adrian da; Silva, Adriana Ferreira; Wander, Alcido ElenorThe aim of this study was to analyze the performance of soy complex exports from the state of Goiás to the main importing countries - China, Netherlands, Thailand, France, South Korea, Spain, Germany and Iran - through the Gravity Model. The chosen period was from 2003 to 2019 and the destinations were selected because they had complete statistical information and because they represented approximately 88% of the Soy Complex exported by the state of Goiás. The Gravity Model was estimated in the formats Pooled, Fixed Effect and Random Effect, being the routines carried out in the R-4.1.2 software, taking into account the GDP of Goiás, the GDP of the importing country, the distance between the capitals, the price of soybeans and a binary variable that captures if China has a greater force in exports. According to the results of the three models, the export elasticity of the Soy Complex in relation to the GDP of Goiás is approximately 1.1% in the Pooled model, 0.64% in the Random Effect model. On the other hand, the export elasticity of the Soy Complex in relation to the GDP of the importing country is 1.81% in both the Fixed Effect model and the Random Effect model. The distance between the capitals was also a significant factor in the exports of the soy complex from Goiás. Furthermore, the results showed that China had a significantly greater influence on the soy complex exports from Goiás compared to the other importing countries. Therefore, the study concluded that it is vital to emphasize the strong dependence of Soy Complex exports from Goiás on China and the need to expand the diversification of these export destinations, in order to make them more diverse and less vulnerable to economic and political events restricted to a single country.Item Razão ótima e efetividade do Hedge para a cultura da soja nos municípios de Rio Verde, Jataí e Cristalina no estado de Goiás(Universidade Federal de Goiás, 2020-05-28) Souza, Géssica Pereira de; Cunha, Cleyzer Adrian da; http://lattes.cnpq.br/8809108474226649; Wander, Alcido Elenor; Cunha, Cleyzer Adrian da; Silva Neto, Waldemiro Alcântara daGiven the complexity and volatility given to prices in the grain market, especially soybeans, risk management have become increasingly relevant. Because of this, this work proposed to present and estimate the effectiveness of the tools, related to futures, available for this action. The first step was the identification of the Base and Base Risk for the region under study, the three municipalities with the highest volume of soy production in the state of Goiás, Rio Verde, Jataí, and Cristalina. Subsequently, we sought to estimate the optimal ratio and effectiveness of the hedge using, for this purpose, models of minimum variance through theOLS. For that, daily Spot prices for soy were used for the cities of Rio Verde, Jataí, and Cristalina. As for future prices, adjustment prices were collected at the expiration of SJC soybean contracts at B3. The data obtained comprise the period from April / 2014 to June / 2019. To obtain the results with greater accuracy, the ADF and KPSS tests were applied to check the series stationarity. Among the proposed models, a hedging strategy that presents greater effectiveness in mit igating risks was the model proposed by Engle and Granger that uses an error correction mechanism, and Rio Verde was the city where the producer used or hedged a higher percentage of its production, 61.30%, reducing by about 51% of the price risks assumed in production. In Jataí, the risk reduction was 53.50%, with an OHR of 60.80%. The city where or hedge had the best result in terms of risk reduction was the municipality of Cristalina, where a reduction was 54%, with an OHR of 54.80%.Item Estratégias de gerenciamento do risco de preços na comercialização do milho em grão nas zonas rurais de Moçambique(Universidade Federal de Goiás, 2015-01-26) Zidora, César Benites Mário; Wander, Alcido Elenor; Cunha, Cleyzer Adrian da; http://lattes.cnpq.br/8809108474226649The present study aims to analyze the hedging strategy in the marketing of maize grain in rural areas of Mozambique. The identification of the target group of farmers living in rural areas of Mozambique that has the cultivation, production and marketing corn as their main rural activity and ensuring subsistence. The surveyed communities are located in three provinces of Mozambique, they are: Maputo, Gaza and Manica. Data collection was done through questionnaires with key questions related to the central objective of the work. The researched producer number was 107, distributed in the three provinces. The research was qualitative and quantitative nature of the exploratory and descriptive. In addition to the primary data obtained through the questionnaires, also did- secondary sources queries such as theses, dissertations, scientific articles related to the topic of this work. In terms of search results it was found that the marketing for Mozambican community plays a leading role in social welfare. Due to lack of further information from producers claim to use no risk management strategy in marketing thus becoming vulnerable to prices for buyers. A small part of the producers, thanks to long experience in producing and marketing area adopt certain strategies for managing price risks, as the firmament of fixed-term contracts, most of them being informal agreements and sometimes not compensatory in the management process price risk . Among the socioeconomic variables that had a significant effect on the influence of the choice and use of hedging strategy to manage the price risk in the marketing of corn, are: schooling, production time, membership in a cooperative and satisfaction financial return.