Abstract
dado o interesse premente, não só da comunidade académica como do mundo empresarial, sobre a internacionalização das empresas, esta investigação faz uma revisão da literatura empírica sobre a internacionalização de Pequenas e Médias Empresas (PME) no continente americano, a partir das principais bases de dados académicas. Partindo de um conjunto de 329 artigos, este estudo analisa em pormenor 39 destes, entre 1999 e 2014, contribuindo significativamente para o desenvolvimento do conhecimento e da compreensão da investigação feita até à data nesta área. Com esta análise, foram identificadas tendências e padrões, podendo concluir-se que a investigação feita sobre a internacionalização de PME centra-se nos Estados Unidos e no Canadá, influenciada sobretudo por quatro grandes tópicos: teorias da internacionalização, estratégia, desempenho e perspetiva internacional. Conclui-se igualmente que há uma predominância quantitativa. As conclusões e interpretações sobre oportunidades para futuras investigações são de relevância tanto para a comunidade académica como para a empresarial.

Abstract
Social entrepreneurship is emerging as an innovative approach for dealing with complex social and environmental needs, and is an important lever for the development of a sustainable society. Social entrepreneurship and related concepts have had a growing attention in the academy, giving rise to dissimilar approaches in the United States of America and in Western Europe. Despite the importance of the Third Sector in Portugal, it has been difficult to set ideal definitions for social entrepreneurship, social entrepreneur and social enterprises. By means of a qualitative study involving four Portuguese social ventures, this chapter identifies contemporary socio-cultural and economic factors that foster social innovation and intervention in Portugal, and contributes to understand the role of social entrepreneur in this context. © 2025 Elsevier B.V., All rights reserved.

Abstract
The university-enterprise (U-E) relationship is a topic that has gathered much interest in the academic world. Universities seek to offer services and technology that help firms to build and foster a harmonious U-E relationship, allowing firms to continually renew their involvement in the relationship. This chapter seeks to analyze the role played by various factors-satisfaction, commitment as perceived by firms, perceived commitment by universities, trust, and reputation-in encouraging firms to continuously renew their involvement in the university relationship. A questionnaire was produced drawing on a literature review looking at U-E relationships, the results of which were then analyzed using partial least squares - structural equation modelling (PLS-SEM). Afyer analyzing 80 responses from firms involved in U-E relationships, it was possible to conclude that commitment of firms, reputation, and the perceived commitment of the universities are very important in the continuous participation of firms in U-E relationships. © 2018, IGI Global.

Abstract
This paper offers a review of published conceptual and empirical studies indexed in the main academic search databases, covering literature on the internationalization of small and medium-sized firms. We analyzed a total of 554 papers covering the period between 1977 and 2014, and found the following general trends: empirical research focuses mainly on Europe and is characterized by a diversity that identifies 74 different topics. This study provides academics and practitioners with a clear perspective on future directions of SME internationalization and contributes to our understanding of the relevant research to date. Copyright © 2016 ASAC. Published by John Wiley & Sons, Ltd. Copyright © 2016 ASAC. Published by John Wiley & Sons, Ltd.

Abstract
Considering the pressing interest of the academic community and the business world over the internationalization of Small and Medium-sized Enterprises (smes), this research is aimed to review the empirical literature about smes’ internationalization processes in the American continent, according to information included in the main academic databases. This study makes an in-depth analysis of 39 papers (out of a group of 329) published between 1999 and 2014, contributing to the construction of knowledge and the understanding of research in this field. This work allowed identifying patterns and trends, as well as concluding that smes’ internationalization research is USA-and-Canada-centered and is largely influenced by four main topics: internationalization theories, strategy, performance and international perspectives. According to the results, it is also concluded that research studies have mainly followed a quantitative approach. Conclusions and interpretations of opportunities for future research are important for both the academic community and the business world.

Abstract
This article analyzes the strategic bilateral bidding behavior in the Spanish electricity wholesale market (OMEL). The collection of data includes information regarding weekly averages of spot prices, the quantity bid in the wholesale market, the quantities purchased in the wholesale market and sold in the open market, and the behavior of conduct parameters for the period from January 2002 to April 2007 for the four largest firms of the Spanish electricity market: Endesa, Iberdrola, Unin Fenosa and Hidrocantabrico. This article employs the New Empirical Industrial Organization approach. The empirical analysis was based on the autoregressive distributed lag approach to cointegration and on the Toda-Yamamoto Granger causality tests to validate the standard version of the theoretical formulation of the standard Cournot model, and its theoretical extension, to encompass the hypothesis of the presence of bid interdependence for electricity quantities sold and bought in the Spanish electricity wholesale market. The results of cointegration and causality analysis reinforce the empirical results of the extended Cournot model with the inclusion of the two main bidding variables that solved the optimization problem of profit maximization for each of the four firms analyzed.