The analysis of interorganizational relationships continues to attract academic research because of the influence that management of supply chain relationships has in business competitiveness. However, there are almost no studies about this decision in the mineral products industry. The purpose of this study is to investigate customer-supplier relationships in the non-metallic mineral products mining and manufacturing industry in order to determine what relational forms enable achieving better business competitiveness and higher quality relationships. To carry out this research, we propose a cohesive model comprising variables to characterize the transactions, the forms of governance and both economic and relational results. The paper is based on a transactional framework; thus, the adoption of one or another form of governance is addressed through the length of the relationship, the transmission of information and the dependencies between the agents. As for the outcome, the quality of the relationship is highlighted because of its importance in business competitiveness. The relational quality is understood as the stability of the relationship or the importance given by the buyer to maintaining the relationship or relational commitment.The hypotheses generated are contrasted by a structural equation model in a sample of 293 Spanish companies. The results confirm the importance of past relationships and integrated forms to get better results. In this sense, managers should encourage trust and dependencies because they positively affect performance. Trust and dependencies determine the choice of a vertical form of governance, and these factors, along with information, intervene in the quality of business relationships. Thus, it is possible to say that forms of governance do have effects on the interrelations between the characteristics of the transactions and the business performance.

The present paper employs the perspective of Transaction Cost Economics (TCE) to analyze the relevance of formal and informal controls in selecting the governance form. The evidence supports the influence of frequency, information sharing and relation-specific investments as a cause of control mechanisms, and the effect of these factors on the choice of the governance form, but there is no evidence about the combined interaction between these variables. The present work proposes that there is a mediation effect of formal and informal norms on the relationship between the TCE variables (frequency, information asymmetry and relation-specific investments) and the governance form. We applied Structural Equation Modelling to companies in the telecommunications sector in Spain. Our results confirm the opposite effect of formal and informal controls on the selection of governance forms and the mediation effect of these mechanisms of control on the selection of the governance form.KEYWORDS | Governance forms, integration, formal control, informal control, transaction characteristics. RESUMO O presente trabalho emprega o ponto de vista da Economia dos Custos de Transação (ECT) para analisar a relevância dos controles formais e informais na seleção da forma de governança. A evidência apoia a influência da frequência, compartilhamento de informações e investimentos específicos como causa dos mecanismos de controle, e o efeito desses fatores sobre a escolha da forma de governança. Entretanto não há nenhuma evidência sobre as interações entre essas variáveis. Este trabalho propõe que existe um efeito de mediação das normas informais e formais sobre a relação entre as variáveis da ECT (frequência, informações assimétricas e investimentos específicos) e a forma de governança. A Modelagem de Equações Estruturais é aplicada a empresas do setor de telecomunicações da Espanha. Os resultados obtidos confirmam o efeito oposto de controles formais e informais e o efeito de mediação dos mecanismos de controle sobre a seleção da forma de governança. PALAVRAS-CHAVE | Formas de governança, integração, controle formal, controle informal, caracterís-ticas da transação. RESUMEN El presente trabajo emplea la perspectiva de la Economía de los Costes de Transacción (ECT) para ana- RAE-Revista de Administração de Empresas | FGV/EAESP

The enormous growth that social networks have experienced in recent years has caused firms to begin to view social networks as enabling environments for supplier-customer interactions. It has been argued that company behavior influences customer participation; however, this notion has rarely been investigated. Therefore, the purpose of this research is twofold as follows: to determine if there are differences among virtual communities regarding customer participation and define the main factors that can cause differences in cocreated value. We used the perspective of grounded theory to analyze seven communities on Facebook that focus on a single product. Our results confirmed the existence of four types of communities. Additionally, community structures and goals were highlighted as the key factors that differentiate communities and affect customer interactions.

Esta investigación analiza si el nivel de atención plena influye en el rendimiento académico, y si esta relación puede venir condicionada por el perfil de aprendizaje de los estudiantes. El nivel de atención plena se estudia a través de la Mindful Attention Awareness Scale y, para el perfil de aprendizaje, se sigue la Teoría del Aprendizaje Experiencial de D. A. Kolb. Los resultados de este estudio ponen de manifiesto que hay perfiles más sensibles que otros ante los distintos estímulos que influyen en el nivel de atención. Su corre

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