Repositório Aberto
Repositório Institucional da Universidade Aberta
Entradas recentes
Course delivery and teaching methods
Publication . Rodrigues, Cristiana Vasconcelos; Frey, Hugo; Williams, John; Baumeister, Hans-Peter; Williams, John; Wilson, Kevin
Aprendizagem ao Longo da Vida: a chave para o futuro
Publication . Santos, Arnaldo
Backpackers' space–time behavior in an urban destination: the impact of travel information sources
Publication . Martins, Márcio Ribeiro; Costa, Rui Augusto; Moreira, Antonio
This research aims to identify the information sources used by backpackers before and during the visit to an urban destination and its influence on the movements performed.
It uses a questionnaire survey combined with a GPS app to track the movements of backpackers to identify backpackers' spatiotemporal behavior. A bivariate analysis using non-parametric tests was used to examine the relationships between variables. This study concludes that the consulting online information before the visit has a great deal of influence on the spatiotemporal behavior of the backpackers, namely on the linearity and intensity of the visit. If online information sources are
very important due to the intense use of information by backpackers, word of mouth from other travelers should not be disregarded as an important information source.
This research can contribute to the definition of more informed and differentiating tourism marketing strategy considering the information sources used and its influence on the movements performed during the visit.
Examining the effect of quantities offered by hydraulic, renewable, non-renewable sources and thermal technologies on electricity prices in the MIBEL market through an ADRL approach
Publication . Moutinho, Victor; Moreira, Antonio; Mota, Jorge
The objective of this article is to analyze and empirically validate the differential effects in the daily schedules of the induced electricity prices by selling bids for three different technologies, namely hydraulic, thermal and renewable energy sources (RES), in hourly values, by daily observations for the year 2018. To achieve this objective, we employ an autoregressive distributed lag (ARDL) model-bound testing approach The results of the ADRL-ECM method, which also reports the long-run analysis, show that (a) the renewable and thermal technologies positively and significantly affect the electricity price for Endesa and Hidroelétrica del Cantábrico generators and (b) the hydraulic technology impacts negatively the electricity price, both at a 1% level of significance. In addition, following a long-term perspective it must be highlighted that RES negatively impact the
price of electricity with a 1% level of significance for the Iberdrola, E.ON Energy, Unión Fenosa and EDP Energy of Portugal generators. However based on a short-term perspective, the results report a positive effect between the quantities traded by hydraulic and thermal technologies on the electricity price for Endesa, Iberdrola, Hidroelétrica del Cantábrico and EDP Energy of Portugal, at a 1% level of significance.
Entrepreneurship and the gig economy: a bibliometric analysis
Publication . Silva, Bruno C.; Moreira, Antonio
There is an increasing number of academic publications on studying the impact of the gig economy and digital platforms. Some of them involve entrepreneurship and business models. However, there is a lack of a global picture depicting the scientific structure of knowledge regarding the gig economy and entrepreneurship. This paper presents a conceptual, intellectual, and social bibliometric overview, using Bibliometrix and Biblioshiny (R-packages). To this end, total of 345 published articles were analyzed, covering 245 sources, 44 countries and 751 authors. There are several important findings: five main clusters emerged from the study (Self-employment
and social economy; Sharing economy and sustainable development; Entrepreneurship and innovation; Gig economy and platform economy; and Digitalization); the main themes that emerge deal with sharing, gig, and platform economy, digitalization, teleworking, career participation and platforms; finally, gig workers are key for developing strategies, policies, and actions to achieve a social welfare through entrepreneurship in the platform ecosystem. It is also important to highlight the role of communities and social capital in the development of sustainable collaborative
initiatives through digital entrepreneurship.