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- Competitividade externa de commodities brasileiras: o caso das rochas ornamentais e de revestimentoPublication . Pereira, Raquel; Dias Pinto Ribeiro, Maria Clara; Castro, LuizThe international trade of marble and granite products, in particular that of ornamental stones and cladding material, has seen, in recent decades, a marked increase in world demand and trade. In this sector, Brazil is a major world player, either as a producer or as exporter. In this sense, it is important to identify which are the factors and the competitive advantages of Brazilian exports of these commodities. The approach followed in this study was based on an ex-post analysis, through the calculation of some international trade indicators, in the 2004-2015 period, namely the Revealed Comparative Advantages Index (RCAI), the Regional Orientation Index (ROI) and the Constant Market Share (CMS) model. The goal is to analyze the performance of Brazilian exports, of the main ornamental and cladding rocks, and to identify their main sources of growth, compared to world exports. The results indicate that, on an aggregate perspective, Brazil has comparative advantages in the entire period (2004-2015), as well as an increase in the share of Brazilian exports in the international market in the recent period, 2012-2015. The ROI results indicate that the Brazilian exports of these products are moving towards the United States of America (USA) and, to a lesser extent, to Italy, Mexico, Canada and Taiwan. Also, the US presents the most dynamic growth rate for the ROI. In addition, the results indicate that some traditional European markets such as the United Kingdom and Spain, are losing relative importance as destination markets for Brazilian exports of these commodities. Regarding the main sources of exports growth, in the first two subperiods, 2004-2007 and 2008-2011, the results indicate that the Brazilian export growth, for the whole sector, was due, mainly, to the growth effect of world trade and that the competitiveness effect was negative in both subperiods. For the most recent period, 2012-2015, the results indicate that the destination effect of exports seems to be the main source of the Brazilian exports growth of these products. Additionally, in this period, the competitiveness effect reaches a positive value. Recognizing the methodology limitations, which can’t identify the variables that determined Brazil's competitiveness in these commodities trade, the results indicate that Brazilian exporters of these commodities may increase exports, especially to new markets with a very dynamic demand.
- O empreendedorismo no setor público existe? Uma revisão da literaturaPublication . Pereira, Raquel; dias pinto ribeiro, maria claraBecause of its relevance as a key factor for development and economic growth, the study and application of entrepreneurship, as an area of knowledge, is in constant development. Although still incipient, the study of entrepreneurship applied to the public sector, and to the public manager's performance, as entrepreneurs, has been a subject of growing interest. In order to contribute to a better conceptual understanding of this theme, namely its questions, ideas and current debate, this paper presents some theoretical reflections and a literature review about entrepreneurship (intrapreneurship) in the public sector context.
- Estratégias de internacionalização – estudo de caso para empresas portuguesasPublication . Pereira, Raquel; Pinto, MarleneA temática da internacionalização mantém-se amplamente debatida sendo considerada uma estratégia chave para a competitividade das empresas e das economias. No contexto português, em que se verifica uma evolução favorável e sustentada das exportações, há vários anos, a internacionalização e diversificação de mercados assume um papel fundamental para a sustentabilidade das empresas. Usando a metodologia qualitativa, pretendemos analisar o processo de internacionalização de três PME portuguesas no sentido de perceber a sua abordagem aos mercados internacionais. Os resultados apontam algumas evidências sobre a utilidade da literatura revista. O modelo Uppsala parece ser útil para compreender parte do Processo de Internacionalização (PI) das PME. Não obstante, há empresas que iniciam a expansão internacional muito rapidamente, para mercados muito dispersos, divergindo com alguns princípios do modelo Uppsala. Para as empresas em análise, a exportação constitui o principal modo de entrada e as razões que determinam o PI estão associadas ao perfil do gerente, ao modelo de negócios e às networks de que a empresa poderá fazer parte.
- Internationalization strategies – a study case for portuguese firmsPublication . Pereira, Raquel; Pinto, MarleneInternationalization remains widely debated as it is seen as a key strategy for the competitiveness of companies and economies. In the Portuguese context, where there has been a favorable and sustained evolution of exports for several years, the internationalization and diversification of markets seems to play a fundamental role for the sustainability of companies. Following a qualitative methodology, our goal is to analyze the internationalization process (IP) of three SMEs to find out how they approach the international markets. The results suggest some evidence concerning the usefulness of the reviewed literature. They indicate that Uppsala model is useful to understand part of the SMEs IP. However, they also indicate that some firms begin their IP very quickly to dispersed markets, diverging from some of the principles of the Uppsala model. For the firms under study, exporting is the main strategy or entry mode in the external markets and the reasons to begin the IP are related to factors such as the manager’s profile, the business model and the networks which the company may be a part of.
- A internacionalização das PME portuguesas: um estudo de casoPublication . Pinto, Marlene; Pereira, RaquelA globalização abriu um vasto leque de oportunidades para as empresas/negócios em todo o mundo. Usando a metodologia qualitativa e o estudo de caso, procuramos analisar o processo de internacionalização de três PME portuguesas com o objetivo de perceber a sua abordagem aos mercados internacionais. Os resultados indicam que o modelo Uppsala é útil para compreender o processo de internacionalização das PME. Contudo, também indicam que há empresas que iniciam a sua expansão internacional muito rapidamente e para mercados geograficamente dispersos, contrariando alguns princípios do modelo Uppsala. Para os casos em análise, a exportação constitui o principal modo de entrada nos mercados externos. Adicionalmente, as razões/fatores que motivam e influenciam a internacionalização, em conjunto com o perfil dos gestores, o modelo de negócio, bem como as networks em que a empresa poderá estar inserida, podem ser os principais impulsionadores da decisão e do reforço do processo de internacionalização.
- Processo de internacionalização de empresas portuguesas – estudo de casoPublication . Almeida, Joana; Pereira, RaquelInternationalization is a field of research that remains widely debated as it is seen as a key strategy for the competitiveness of companies and economies. In the Portuguese context, where there has been a favourable and sustained evolution of exports for several years, the internationalization and diversification of markets seems to play a fundamental role for the sustainability of the business. Considering that an internationalization process is a complex process, involving high risks, the aim of this work will be to study the internationalization process of portuguese companies. Following a qualitative methodology, based on case study, we intend to understand why and how its internationalization process occurred, its goals and the strategies involved. Given that, when analyzing the process of internationalization of a company, it´s important to confront theoretical models with business practice, we will try to confront and verify the validity of relevant theories and literature with the cases under analysis.
- Trinta anos de integração económica não são suficientes: análise dos resultados do mercado laboral de duas regiões limítrofesPublication . Pereira, Raquel; Fernandéz, Melchor
- Electrochemical miRNA-34a-based biosensor for the diagnosis of Alzheimer’s diseasePublication . Pereira, Raquel L.; Oliveira, Daniela; Pêgo, Ana P.; Santos, Sofia D.; Moreira, Felismina T.C.Alzheimer's disease (AD) is the most common dementia type and a leading cause of death and disability in the elderly. Diagnosis is expensive and invasive, urging the development of new, affordable, and less invasive diagnostic tools. The identification of changes in the expression of non-coding RNAs prompts the development of diagnostic tools to detect disease-specific blood biomarkers. Building on this idea, this work reports a novel electrochemical microRNA (miRNA) biosensor for the diagnosis of AD, based on carbon screen-printed electrodes (C-SPEs) modified with two gold nanostructures and a complementary anti-miR-34a oligonucleotide probe. This biosensor showed good target affinity, reflected on a 100 pM to 1 μM linearity range and a limit of detection (LOD) of 39 pM in buffer and 94 aM in serum. Moreover, the biosensor’s response was not affected by serum compounds, indicating selectivity for miR-34a. The biosensor also detected miR-34a in the cell culture medium of a common AD model, stimulated with a neurotoxin to increase miR-34a secretion. Overall, the proposed biosensor makes a solid case for the introduction of a novel, inexpensive, and minimally invasive tool for the early diagnosis of AD, based on the detection of a circulating miRNA overexpressed in this pathology.
- Electrochemical miRNA-34a-based biosensor for the diagnosis of Alzheimer’s diseasePublication . Pereira, Raquel L.; Oliveira, Daniela; Pêgo, Ana P.; Santos, Sofia D.; Moreira, Felismina T.C.Alzheimer's disease (AD) is the most common dementia type and a leading cause of death and disability in the elderly. Diagnosis is expensive and invasive, urging the development of new, affordable, and less invasive diagnostic tools. The identification of changes in the expression of non-coding RNAs prompts the development of diagnostic tools to detect disease-specific blood biomarkers. Building on this idea, this work reports a novel electrochemical microRNA (miRNA) biosensor for the diagnosis of AD, based on carbon screen-printed electrodes (C-SPEs) modified with two gold nanostructures and a complementary anti-miR-34a oligonucleotide probe. This biosensor showed good target affinity, reflected on a 100 pM to 1 μM linearity range and a limit of detection (LOD) of 39 pM in buffer and 94 aM in serum. Moreover, the biosensor’s response was not affected by serum compounds, indicating selectivity for miR-34a. The biosensor also detected miR-34a in the cell culture medium of a common AD model, stimulated with a neurotoxin to increase miR-34a secretion. Overall, the proposed biosensor makes a solid case for the introduction of a novel, inexpensive, and minimally invasive tool for the early diagnosis of AD, based on the detection of a circulating miRNA overexpressed in this pathology.