http://hdl.handle.net/10183/63 2026-06-30T04:30:46Z http://hdl.handle.net/10183/307793 Adaptação à escassez de água : um estudo de caso do setor suinícola no Rio Grande do Sul Farias, Fabiana Silveira de A escassez de água impõe desafios aos produtores de suínos de maior escala e especialização. A atividade exige água abundante e com qualidade, e caso não acessível, pode comprometer a sanidade do rebanho. A escassez de água é uma ameaça global, e é agravada pelas mudanças climáticas. A adaptação é uma forma de lidar com este desafio. O Estado do Rio Grande do Sul é o terceiro maior produtor nacional de carne suína e no ranking global o Brasil se destaca na quarta posição. Na região Sul a produção de suínos é caracterizada pela integração as cooperativas e pela participação da agricultura familiar. Para a próxima década é previsto o crescimento global no consumo de carne suína, e a produção no Brasil deve aumentar. Por meio de um estudo de caso em uma cooperativa agroindustrial no estado do Rio Grande do Sul esta pesquisa explorou as formas de adaptação à escassez de água por produtores de suínos, e as barreiras associadas ao processo de adaptação. Os dados empíricos coletados por meio de entrevistas semiestruturadas e análise de conteúdo evidenciaram que os produtores adotam um conjunto de formas de adaptação à escassez de água, tais como: armazenamento; mais de uma fonte de água; fontes coletivas e comunicação entre os pares e a Cooperativa.; Water scarcity poses challenges to large-scale and specialized pig producers. This activity requires abundant, high-quality water, and when access is limited, herd health may be compromised. Water scarcity is a global threat, further exacerbated by climate change. Adaptation represents a key strategy for addressing this challenge. The state of Rio Grande do Sul is the third largest national producer of pork, and Brazil ranks fourth globally. In Southern Brazil, pig production is characterized by integration with cooperatives and the strong participation of family farming. Over the next decade, global pork consumption is projected to increase, and production in Brazil is expected to expand accordingly. Through a case study conducted in an agro-industrial cooperative in the state of Rio Grande do Sul, this research explored the ways in which pig producers adapt to water scarcity, as well as the barriers associated with the adaptation process. Empirical data collected through semi-structured interviews and content analysis revealed that producers adopt a range of adaptation strategies to cope with water scarcity, including water storage, the use of multiple water sources, collective supply systems, and communication among peers and with the cooperative. 2026-01-01T00:00:00Z http://hdl.handle.net/10183/307766 Entrepreneurial marketing as a universal strategic paradigm : from operational fragmentation to empirical generalization De Conto, Pedro Faccio Despite three decades of research positioning Entrepreneurial Marketing (EM) as a relevant strategy for growth and survival, the field remains conceptually ambiguous, methodologically fragmented, and limited by unresolved questions regarding its universality. This work challenges these limitations by investigating the extent to which EM constitutes a universal strategic paradigm. Adopting a multi-method research design comprising three interconnected studies, this work advances from an operational diagnosis to empirical testing and, finally, to meta-analytical generalization. Study 1 provides the analytical foundation through a Systematic Literature Review (SLR) of EM operationalization. Analyzing the empirical landscape, it identifies four distinct conceptual clusters and reveals a "measurement mess" dominated by the Morris et al. (2002) framework, yet characterized by redundancy and divergent operationalizations. This review highlights the need for psychometric rigor and standardized operationalization to enable cumulative knowledge. Building on these findings, Study 2 investigates the underlying mechanism of EM using the refined ENMAR scale. Through a cross-national survey of SMEs in an emerging economy (Brazil, N=176) and a developed economy (USA, N=197), this study tests a structural model in which EM acts as a dynamic capability that transforms the entrepreneur’s Social Capital (structural, relational, and resources) into firm performance. Contrary to Institutional Voids Theory, the results reveal that this resource-transformation mechanism is statistically invariant across economic contexts, providing initial evidence of EM’s universality. Study 3 overcomes the limitations of single-sample research through the first comprehensive meta-analysis of the field, synthesizing 71 effect sizes from 59 independent samples. The findings establish a strong, positive relationship between EM and firm performance (ρ = 0.532). In addition, moderator analysis demonstrates that the high heterogeneity in previous research (I² = 96.95%) is primarily driven by methodological artifacts (e.g., zero-order correlations vs. multivariate models) rather than contextual differences. No significant differences were found between developed and emerging economies, or between SMEs and large firms. Collectively, these studies challenge the narrative of EM as a survival mechanism restricted to resource-constrained firms. Instead, this work establishes Entrepreneurial Marketing as a context-invariant dynamic capability, a mechanism of value creation that converts network resources into superior performance, regardless of organizational size or economic environment. 2026-01-01T00:00:00Z http://hdl.handle.net/10183/306507 Impacts of climate change on wine business : bibliometric analysis and case study on Mendoza region Maurice, Baudouin This master thesis analyses the growing impact of climate change on the global wine industry, focusing on the Mendoza Region, Argentina. We organized the thesis in two articles. The first article presents a detailed bibliometric analysis of scientific publications related to climate change and viticulture. Using data extracted from the Scopus database, this study covers the period from 2010 to 2023, analyzing a corpus of 39 carefully selected articles. The research highlights key publication trends, identifies the most influential authors and institutions, and maps emerging research themes in this field. The study reveals significant growth in literature on this topic, with an annual increase of 13% in publications, underscoring the growing attention to this topic. The main themes identified include adaptation strategies, innovation in viticultural practices, and the economic impact of climate change on the wine industry. The second article focuses on an indepth case study of the Mendoza wine region in Argentina, examining the concrete implications of climate change for the conservation of terroir fertility and the organization of producers. Using a qualitative approach, this research is based on interviews with local producers, particularly at Domaine Bousquet, and a comprehensive document analysis. The study highlights the specific challenges faced by Mendoza's winegrowers, such as decreasing water resources, increasing temperatures, and the increased frequency of extreme weather events. It explores in detail the adaptation strategies implemented, including the adoption of sustainable agricultural practices such as organic, biodynamic, and regenerative agriculture. The article also emphasizes the crucial importance of water management in this semi-arid region, presenting data on river flows and water use by vineyards. By synthesizing these two perspectives, this research offers a holistic view of the challenges posed by climate change to the wine industry. It highlights the importance of innovation, collaboration between industry actors, and the adaptation of public policies to ensure the sustainability of viticulture. The results underscore the need for an integrated approach, combining short-term strategies to address immediate challenges and long-term plans to sustainably transform viticultural practices. This study thus provides insights for researchers, practitioners in the wine sector, and policy makers, contributing to shaping the future of a resilient and sustainable wine industry in the face of climate change. 2024-01-01T00:00:00Z http://hdl.handle.net/10183/306501 Essays in cryptofinance Almeida, Lucas Mussoi This dissertation presents an empirical analysis of decentralized finance through three distinct studies. By harnessing the power of on-chain data, this research delves into the mechanics of DeFi, exploring how we assess financial risk and measure market efficiency. Furthermore, it directly addresses the significant economic exter nalities of the sector by measuring the annualized energy draw of Bitcoin’s global mining industry. The first article, Risk forecasting comparisons in decentralized fi nance: An approach in constant product market makers (this research was presented at the Annual Conference of the Banco Central do Brasil (2024) and subsequently published in the Journal of Economics and Business, Volume 133, 2025; 2024 JCR Impact Factor: 3.4), pioneers by comparing risk measures between centralized and decentralized exchanges. By employing a vast dataset from Uniswap V2 Liquid ity Pool (LP) and conducting a meticulous comparative analysis of Value-at-Risk (VaR) and Expected Shortfall (ES) forecasts, using both parametric Generalized Autoregressive Conditional Heteroskedasticity (GARCH) models and the non para metric DeepAR neural network, it demonstrates that liquidity provision generally presents a statistically significant lower risk profile than an equivalent buy and hold strategy. A critical exception exists for stablecoin pairs, where protocol fees become the primary risk driver. This research provides a crucial empirical foundation for developing sophisticated, model informed risk management tools in Decentralized Finance (DeFi). The second article, Pricing efficiency in cryptocurrencies: the case of centralized and decentralized markets (published in the Journal of Economics and Business, Volume 133, 2025; 2024 JCR Impact Factor: 3.4), offers a comparative analysis of market efficiency between liquidity pool mechanisms and traditional order book systems. Utilizing Asymmetric Multifractal Detrended Fluctuation Analysis (asym metric MF-DFA) and the Thermal Optimal Path (TOP) method on data from Binance and Uniswap V2, it reveals that algorithmic LP can achieve superior weak form market efficiency compared to Centralized Exchanges (CEX) order books. The study conclusively identifies the Decentralized Exchanges (DEX) as the lead market in price discovery, transmitting signals to its centralized counterpart with an average lag of under 24 hours. This efficiency premium, driven by radical transparency and high velocity arbitrage, intensified significantly following the Ethereum 2.0 upgrade. The third article, Bitcoins halving events and the fractal nature of mining energy consumption, investigates the long term impact of Bitcoins programmed monetary policy on its mining energy consumption behavior. Applying asymmetric MF-DFA to data from the Cambridge Centre for Alternative Finance, it uncovers the com plex, multifractal nature of Bitcoins energy dynamics, showing an evolution from persistent, heterogeneous behavior before halving events toward more efficient and random consumption characteristics after each subsequent halving. The analysis provides the first documented evidence of a significant cross-chain effect, showing that Ethereum’s transition to Proof of Stake (PoS) consensus triggered an immediate and sustained decrease in the persistence of Bitcoin’s energy consumption patterns. This finding reveals previously unrecognized interconnectivity between seemingly independent networks and creates new pathways for assessing the environmental relationships within blockchain ecosystems.; Esta dissertação apresenta uma análise empírica de finanças descentralizadas por meio de três estudos distintos. Utilizando dados on chain, a pesquisa examina avaliação de risco financeiro, eficiência de mercado e consumo energético anualizado da mineração de Bitcoin. O primeiro artigo, Risk forecasting comparisons in de centralized finance an approach in constant product market makers (Computational Economics, 2025), desenvolve uma metodologia comparativa para medidas de risco entre CEX e DEX. Empregou-se dados de LP da DEX Uniswap V2, conduzindo uma análise comparativa de previsões de Value at Risk e Expected Shortfall. Para isso, fez-se uso tanto de modelos paramétricos GARCH quanto do modelo de rede neural não paramétrica DeepAR, os resultados demonstraram que a provisão de liquidez geralmente apresenta perfil de risco estatisticamente inferior à estratégia tradicional de buy and hold. Uma exceção crítica ocorre em pares de stablecoins, onde as taxas do protocolo tornam-se o principal fator de risco. Esta pesquisa fornece base em pírica crucial para desenvolver ferramentas sofisticadas de gestão de risco informadas por modelos em DeFi. O segundo artigo, Pricing efficiency in cryptocurrencies the case of centralized and decentralized markets (Journal of Economics and Business, 2025), oferece uma análise comparativa da eficiência de mercado entre os mecanismos de liquidity pools e o tradicional sistema de order books. Utilizando Asymmetric Multifractal Detrended Fluctuation Analysis e o método Thermal Optimal Path em dados da corretora Binance e do Uniswap V2, revelamos que os algorítmos contidos nos smart contracts, que regem as liquidity pools, são mais eficientes na weak form de eficiência de mercado quando comparados aos order books centralizados. O estudo também identifica o mecanismo decentralizado como líder na descoberta de preços, transmitindo sinais para sua contraparte centralizada com defasagem média inferior a 24 horas. Este prêmio de eficiência, impulsionado pela radical transparência e arbitragem, mostrou se intensificar após a atualização 2.0 do Ethereum. Oterceiro artigo, Bitcoins halving events and the fractal nature of mining energy consumption, investiga o impacto de longo prazo da política monetária programada do Bitcoin em seu comportamento de consumo energético de mineração. Aplicando Asymmetric Multifractal Detrended Fluctuation Analysis à dados do Cambridge Centre for Alternative Finance, desvenda-se a natureza multifractal complexa da dinâmica energética do Bitcoin. O estudo revela uma evolução nos padrões de con sumo energético, transicionando de um comportamento heterogêneo no período pré halving para características de consumo mais eficientes e estocasticamente aleatórias após cada evento de halving subsequente. A análise apresenta a primeira evidência documentada de um efeito cross-chain significativo, demonstrando que a transição do Ethereum para o Proof of Stake provocou uma redução imediata e persistente na regularidade dos padrões de consumo energético da mineração de Bitcoin. Essa constatação revela uma interconexão até então não reconhecida entre blockchains aparentemente independentes. 2025-01-01T00:00:00Z