Title: Suleman, A.(2017), Validation of Archetypal Analysis, The 2017 International Conference on Fuzzy Systems - FUZZ-IEEE 2017, Nápoles, JUL 9-12, 2017. Date: 2017 Publisher: The 2017 International Conference on Fuzzy Systems - FUZZ-IEEE 2017 Link: https://ciencia.iscte-iul.pt/publications/validation-of-archetypal-analysis/37991 Publication type: Publication in conference proceedings Research Project: N.A. Abstract: We use an information-theoretic criterion to assess the goodness-of-fit of the output of archetypal analysis (AA), also intended as a fuzzy clustering tool. It is an adaptation of an existing AIC-like measure to the specifics of AA. We test its effectiveness using artificial data and some data sets arising from real life problems. In most cases, the results achieved are similar to those provided by an external similarity index. The average reconstruction accuracy is about 93%.

Title: Suleman, A., Suleman, F., Lagoa, S. (2017), Understanding Firms Compensation Policy Using Fuzzy Sets, The 2017 International Conference on Fuzzy Systems - FUZZ-IEEE 2017, Nápoles, JUL 9-12, 2017. Date: 2017 Publisher: The 2017 International Conference on Fuzzy Systems - FUZZ-IEEE 2017 Link: https://ciencia.iscte-iul.pt/publications/understanding-firms-compensation-policy-using-fuzzy-sets/37990 Publication type: Publication in conference proceedings Research Project: N.A. Abstract: It has been noted in the literature that firms rarely follow a single theoretical model when designing their compensation policy. This study illustrates how a fuzzy cluster analysis can be helpful in understanding the way employees are rewarded according to firms’ specificity and market conditions. For this purpose, we convert linked employer-employee data (LEED) into firm level data prior to fuzzy clustering. Then, we explore the particular distribution of firms on the emerged fuzzy partition to sort them by compensation policy and, eventually, to examine the potential factors behind a specific option.

Maria José Sardinha Research Group: Cities and Territories Supervisor(s): Paulo Tormenta Pinto Summary N.A. Period: 2009-... Resources: N.A.

Gustavo Toshiaki Sugahara Research Group: Cities and Territories Supervisor(s): Rune Halvorsen Summary N.A. Period: 2015-2018 Resources: N.A.

Carolina Henriques Research Group: Cities and Territories Supervisor(s): Teresa Costa Pinto Summary N.A. Period: 2016-2019 Resources: N.A.

Maria João Oliveira Research Group: Cities and Territories Supervisor(s): Vasco Rato, Carla Leitão Summary N.A. Period: 2014 - 2019 Resources: N.A.

Diptes Bhimjee Research Group: Governance, Economy and Citizenry Supervisor(s): Sofia Ramos, Emanuel Leão Summary The present Doctoral Thesis is comprised of three empirical essays addressing the Global Financial Crisis of 2007 – 2008. The said essays analyse distinct, but interconnected issues pertaining to this fundamental research topic. In the first paper, a careful examination is conducted in order to ascertain whether the ‘Subprime’ Crisis in the U.S.A. might have been duly forecasted using publicly available data. This hypothesis is confirmed by using two distinctive methodologies applied to a set of financial indicators, which independently confirm the predictability of the said financial shock. The second paper addresses the degree of heterogeneity of banking responses in forty two countries in the wake of the Global Financial Crisis. By employing a novel methodology – the Heterogeneous Regime-Switching Model (HRSM) –, representative country banking institutions worldwide are deemed to have had quite distinctive and heterogeneous responses to the onset of the global systemic event under scrutiny, and these responses may be grouped according to certain clusters. The third paper addresses the impact of the Global Financial Crisis upon the Euro Area and corresponding sovereign debt schedules. An updated academic survey is first conducted regarding the topic of the impact of excessive Member States’ sovereign debt in the wake of the systemic breakdown. The survey is followed by an empirical study using quadratic econometric specifications demonstrating that the over-accumulation of sovereign debt in the Euro Area is strongly associated with the diminishment of output growth in the latter Area, and that sound sovereign debt thresholds in key Euro Area Member States have been unwisely breached.A presente Tese Doutoral abarca três ensaios académicos empíricos que analisam a Crise Financeira Global de 2007 – 2008. Estes ensaios analisam questões científicas distintas, mas interligadas entre si, relativamente a este fundamental tópico de investigação. O primeiro ensaio investiga cuidadosamente a hipótese segundo a qual a Crise ‘Subprime’ nos E.U.A. poderia ter sido adequadamente prevista por recurso a dados publicamente disponíveis. Esta hipótese é verificada por recurso a duas metodologias alternativas, devidamente aplicadas a um conjunto de indicadores estritamente financeiros, sendo confirmada a previsibilidade do dito choque financeiro. O segundo ensaio investiga, no seguimento da Crise Financeira Global, o grau de heterogeneidade dos comportamentos de instituições financeiras em quarenta e dois países. Utilizando uma inovadora metodologia – intitulada Heterogeneous Regime-Switching Model (HRSM) –, constata-se que os distintos sistemas financeiros nacionais reagiram de forma diferenciada e heterogénea ao choque financeiro global sob estudo, sendo estas respostas passíveis de serem agrupadas em certas categorias. O terceiro ensaio investiga o impacto económico da Crise Financeira Global sobre a Zona Euro e, em particular, sobre a dinâmica da respectiva dívida soberana. Primeiramente, é elaborado um survey académico actualizado relativamente ao tópico do excessivo endividamento público e respectivo impacto sobre o produto económico, prestando-se particular atenção ao contexto do choque sistémico sob análise. Este survey académico é seguido de uma aplicação empírica envolvendo especificações econométricas quadráticas que atestam que a excessiva acumulação de dívida soberana na Zona Euro está associada a um processo de decrescimento económico da dita Zona, e que níveis óptimos associados a rácios de dívida pública em determinados Estados Membros foram imprudentemente ultrapassados. Period: ... - 2013 Resources: http://hdl.handle.net/10071/6867

Pedro Gomes da Costa Research Group: Governance, Economy and Citizenry Supervisor(s): Margarida Perestrelo Summary N.A. Period: 2013 - 2016 Resources: N.A.

Visiting Researcher Research Group Innovation and Knowledge Short Bio PhD Research Fellow in TIK Center for Technology, Innovation and Culture, University of Oslo MSc. in Geography, University of HelsinkiMSc. in Engineering, Environmental Management and Sustainability Sciences, Aalborg University + info Updated: 03/08/2017

João Paulo Delgado Research Group: Cities and Territories Supervisor(s): Paulo Tormenta Pinto Summary Taking the study of “Ars Arquitectos” work as its foundation, this thesis aims at presenting an integrated view of 1930s Portugal architectural modernity. The main goal is to incorporate scopes usually presented as disconnected, such as those of cultural, ideological and technological nature. “Ars Arquitectos” was an architectural team formed by António Fortunato Cabral (1903-1978), Mário Soares Morais (1908-1975) and Fernando da Cunha Leão (1909-1990). Together, they have designed a number of significant projects in the northern region of Portugal. What distinguishes these architects as relevant in the Portuguese architectural scene is the confluence of three factors, difficult to find simultaneously: a proximity with some of the most prominent artists and art critics of their generation; an affinity with the right-wing opposition to the existing regime; finally, a close collaboration with some of the best Portuguese civil engineers. Through the study of three selected buildings, this thesis seeks to understand how the introduction of new building technologies clashed with both cultural and ideological issues. At the same time, the thesis questions the true extent of the relationship between architecture and engineering in Portugal, on one hand, and architecture and political power on the other. To address these key issues, the thesis uses two complementary methodological approaches. The first approach assumes a contextualizing character in order to secure a historical and conceptual framework. The second approach, directly related with the selected projects, is based on a graphical analysis and an anatomic understanding of the buildings. Period: 2008 - 2015 Resources: http://hdl.handle.net/10071/9993