Tiago Oliveira

• PhD
• Professor at NOVA Information Management School (NOVA IMS)

In the European Union, the circular economy is gaining relevance to increase competitiveness and promote economic growth while decreasing environmental consequences and primary resource dependency. This study uses factor and cluster analysis to uncover the disparities in the main circular economy dimensions within the European Union 27, covering th...

Desde os anos 50 do século passado que o desempenho académico tem sido foco de interesse por parte de investigadores e decisores políticos. No entanto, apenas recentemente os métodos de ciência de dados começaram a ser aplicados de forma mais sistemática a este tema. Este trabalho utiliza os dados dos exames nacionais de matemática e português da p...

Video conferencing (VC) applications (apps) have surged in popularity as an alternative to face-to-face communications. Although VC apps offer myriad benefits, it has caught much media attention owing to concerns of privacy infringements. This study examines the key determinants of professionals’ attitude and intentions to use VC apps in the backdr...

This study explores the contribution of various drivers of attainment in secondary education in Portugal. We propose a model explaining the influence of students, teachers, and parents' traits on high school achievement, measured by the self-reported Math and Portuguese final grades of 220 students. Using PLS-SEM, we show that previous achievement...

Purpose This research aims to gain a holistic understanding of how video conferencing (VC) apps' media characteristics influence individuals' perceptions of VC apps and, ultimately, their use and continued use in professional settings. Design/methodology/approach A conceptual research model is developed by integrating constructs from media synchro...

Industry 4.0 refers to the application of new technologies to production and supply chain processes under the fourth industrial revolution (4th IR) paradigm and has been studied mainly in manufacturing. The present study looks to understand how the 4th IR manifests itself in the EU countries and across different industries through an Industry 4.0 p...

Despite its increase in recent years, e-commerce is far from surpassing traditional trade, and the online purchase of travel arrangements is no exception. Using an integrated model founded in theory about consumers’ attitude and behaviour, we studied the behaviour intention of online purchasers of travel services, based on an online questionnaire a...

Academic achievement is of great interest to education researchers and practitioners. Several academic achievement determinants have been described in the literature, mostly identified by analyzing primary (sample) data with classic statistical methods. Despite their superiority, only recently have machine learning methods started to be applied sys...

This paper applies deep learning to the prediction of Portuguese high school grades. A deep multilayer perceptron and a multiple linear regression implementation are undertaken. The objective is to demonstrate the adequacy of deep learning as a quantitative explanatory paradigm when compared with the classical econometrics approach. The results enc...

Smart home services are a new generation of consumer services. Supported by the Internet of Things (IoT) technology, they deliver security, comfort, entertainment, assisted living, and efficient management of the home to improve the quality of life of consumers. As the availability of smart home services expands, there is still a lack of understand...

The present study presents an Industry 4.0 measurement model that is applied to a sample of Portuguese companies from several economic sectors beyond manufacturing. An Industry 4.0 measurement scale is developed through a three-step methodology that relies on a mixed-methods approach. Five constructs are identified from literature, together with re...

The circular economy plays a central role in Europe's new agenda for sustainable economic growth. Using Eurostat and United Nations data from 28 European countries pertaining to the years between 2011 and 2017 we identified two underlying dimensions of the circular economy — environmental degradation and resource efficiency. Then, using dynamic pan...

Understanding the determinants of academic achievement (AA) is crucial for virtually every stakeholder interested in personal development and individual and societal wellbeing. Extensive research in several areas, such as education, economics, or psychology, has addressed this topic, identifying a vast number of determinants that impact high school...

The use of mobile payment (m-payment) is growing exponentially in developing countries. A small number of investigations have been undertaken on what makes people continue to use m-payment in an African context. We combine the task technology fit (TTF) model, expectation-confirmation model (ECM), and trust dimension to explain the influence of cont...

Data and information play a critical role in cyber security policies in organizations, so it is essential to protect them. Companies invest in the latest and most secured softwares, and specialized IT employees to protect the firm’s data and information. Nevertheless, there are still incidents and huge losses of information because of the careless...

The advent of the global pandemic has accelerated the growing need for product and service transformation, highlighting the emerging importance of technology and creating the opportunity to update the digital transformation (DT) domain through empirical-quantitative research. This weight and meta-analysis enabled the synthesis and integration of pr...

With fast-growing technology, schools have to adapt and use technology constantly as a tool to grow. This study aims to understand the influence of computer factors on students' academic achievement. We propose a model on the influence of computer attitudes, computer learning environments, computer learning motivations, computer confidence, compute...

This study focuses on the machine learning bias when predicting teacher grades. The experimental phase consists of predicting the student grades of 11th and 12thgrade Portuguese high school grades and computing the bias and variance decomposition. In the base implementation, only the academic achievement critical factors are considered. In the seco...

This paper assesses the digital divide between and within the 28 member-states of the European Union. The analysis comprised four socio-demographic contexts: age, education, gender, and income. Because of the digital divide’s complexity, a multivariate approach was applied - factor analysis with oblique rotation, which resulted in two distinct dime...

Few studies have been conducted about individuals’ continuance to use m-payment, especially in an African context. This study investigates the continuance intention to use m-payment, employing two theoretical models: the DeLone and McLean information system (D&M IS) success model and the expectation-confirmation model (ECM) in an African context. W...

This article uses an anonymous 2014–15 school year dataset from the Directorate-General for Statistics of Education and Science (DGEEC) of the Portuguese Ministry of Education as a means to carry out a predictive power comparison between the classic multilinear regression model and a chosen set of machine learning algorithms. A multilinear regressi...

During periods of public unrest, people tend to increase their daily usage of social media sites, such as Facebook, Instagram, or WhatsApp, to keep themselves abreast of developments and share their opinions. Over the last trimester of 2019, there were many demonstrations of public unrest in Latin-American countries, including Ecuador, Chile, and B...

This paper aims to identify the main drivers for Blockchain adoption within Supply Chains, following the Design Science Research (DSR) methodology and focusing on defining, validating, and reducing a myriad of factors with the aid of experts on both fields. Based on the literature review, and through means of questionnaires, factors were rated and...

E-learning can play an important role in the solution to educate a large quota of the population in significant countries. Studies point out that cultural characteristics can influence e-learners’ performance. Our main goal is to understand the e-learning success drivers in Brazil. Our research proposes a model that analyzes students' long-term ori...

Social media are probably one of the most influential and disruptive technology of the present times. It is ubiquitous and has the capability to influence virtually every aspect of one’s life while, at the same time, also influence the way firms and public organizations operate and communicate with individuals. Although there is a plethora of studi...

Machine learning (ML) is expected to transform the business landscape in the near future completely. Hitherto, some successful ML case-stories have emerged. However, how organizations can derive business value (BV) from ML has not yet been substantiated. We assemble a conceptual model, grounded on the dynamic capabilities theory, to uncover key dri...

Purpose – This study aims to describe, synthesise and clarify the findings of published studies on individual continuance intention to use an information system (IS), considering the fact that the number of studies in the continuance intention context are growing exponentially and cover several different subjects. Design/methodology/approach – The...

Collaborative consumption (CC) platforms are growing tremendously because they facilitate exchange with owners who have unutilised resources and individuals who want to access those resources at a low cost. We study the intention to recommend and intention to share CC platforms, by combining the unified theory of acceptance and use of technology, a...

Understanding academic achievement (AA) is one of the most global challenges, as there is evidence that it is deeply intertwined with economic development, employment, and countries' wellbeing. However, the research conducted on this topic grounds in traditional (statistical) methods employed in survey (sample) data. This paper presents a novel app...

Tourism practices and destination decisions are more and more affected by the opinions of trusted friends channeled through social media, and it is therefore of great interest to explore the role that this plays in the travel context. It is also valuable to understand the behaviour of people commonly known as “lurkers”, who travel but do not share...

This study assesses the effect of some extended Enterprise Resource Planning (ERP) capabilities (Collaboration, Analytics, Web-portals, Add-ons) and ERP use on ERP value. The research conducted, followed a mixed-methods approach using an exploratory study (Delphi) and the resource-based view of the firm to understand the ERP capabilities and develo...

This study aims to understand the determinants of geographical information technologies at the scale of post-adoption use and intention to increase the level of use in Mozambican institutions. Three known theories (diffusion of innovation theory, technology – organisation – environment framework, and institutional theory) have been used in order to...

We propose a model consisting of five people-factors that influence the success of on-going agile software development projects, success being measured in terms of cost, time, and customer satisfaction. After surveying 216 agile practitioners, the results obtained using SEM-PLS suggest that “team capability” and “customer involvement” are the main...

The data presented in this article relates to the individual intrinsic and extrinsic motivations to share travel experience in social media. The 381 records were gathered in Portugal using an online survey. A statistical analysis of the data was carried out using partial least squares (PLS). This dataset shows a relationship between identification,...

The use of mobile applications (apps) has been growing in the world of technology, a phenomenon related to the increasing number of smartphone users. Even though the mobile apps market is huge, few studies have been made on what makes individuals continue to use a mobile app or stop using it. This study aims to uncover the factors that underlie the...

Firm performance impact arising from capabilities enabled by software-as-a-service enterprise applications (SaaS EA) has been the subject of limited research. By drawing on the resource-based view and competitive strategy theories, this study builds a model that (1) explains the firm performance effect of firm capabilities supported by SaaS EA and...

In the information management literature, Software-as-a-Service (SaaS) is recognized as a technology capable of providing operational and financial benefits to firms, and it is rising as the dominant IT service delivery model. Considered to be a promising solution it is garnering interest among researchers and professionals. However, SaaS can repre...

Purpose While most e-commerce studies focus on the understanding of online customer behaviour, mainly adoption and purchase behaviours. The purpose of this paper is to examine the relationship between e-commerce and individual performance. The authors test the role of systems, information and service quality in e-commerce use and user satisfaction....

[This corrects the article DOI: 10.1016/j.heliyon.2019.e02261.].

Despite the considerable benefits of CRM, there is a paucity of research considering CRM adoption stages (evaluation, adoption, and routinization). Thus, we developed a conceptual model using the technology-organisation-environment (TOE) framework to examine the antecedents that affect CRM adoption stages in firms. We used partial least squares str...

The relationship between sense of place, social capital and civic engagement has been studied in different disciplines. However, their association has been less examined, and their spatial relationship has been analyzed even less. This study contributes to a better understanding of the relationship between these three concepts (i.e., sense of place...

Local governments around the world are increasingly implementing e-participation platforms to involve citizens in consultation and decision-making processes. E-participation platforms usually succeed and produce positive effects in the community when adopted in the long-term scenario. The adoption of those platforms is still a challenge for local g...

Industry 4.0 is a concept that represents the adoption by industrial companies of techniques and processes allowed by digitization, cloud computing, the internet of things and big data to gain competitive advantages in domestic and global markets. Measuring how the manufacturing sector is adopting Industry 4.0 is challenging, given that there is no...

Although big data analytics (BDA) is considered the next "frontier" in data science by creating potential business opportunities, the way to extract those opportunities is unclear. This paper aims to understand the antecedents of BDA value at a firm level. The authors performed a study using a mixed methodology approach. First, by carrying out a De...

Purpose Although studies have investigated reasons for software as a service (SaaS) adoption, it is unclear how firm-level SaaS use impacts future SaaS intentions. The purpose of this paper is to propose a theoretical model that integrates the technology-organization-environment framework, institutional theory, diffusion-of-innovation theory and th...

Massive open online courses (MOOCs), contribute significantly to individual empowerment because they can help people learn about a wide range of topics. To realize the full potential of MOOCs, we need to understand their factors of success, here defined as the use, user satisfaction, along the individual and organizational performance resulting fro...

Big data analytics (BDA) and the Internet of Things (IoT) tools are considered crucial investments for firms to distinguish themselves among competitors. Drawing on a strategic management perspective, this study proposes that BDA and IoT capabilities can create significant value in business processes if supported by a good level of data quality, wh...

Geographic information technologies (GIT) have matured, have become pervasive throughout many types of organizations over recent decades and gained a wide range of attention in diverse sectors of society. The goal of this paper is to identify the main drivers and uses of GIT in organizations and to give an overview of GIT uses in developing countri...

Online citizen public participation in consultation and decision-oriented processes supported by local governments is a key ingredient for successful digital democracy. As the participatory process is a voluntary activity, social capital, and individual motivation can help to understand citizen engagement in the usage of electronic participatory pl...

The continuous use of dynamic and disruptive ICT as energizing elements of the educational process is a reality of current days, where millennials are the centre of an education paradigm in which students are much more inclined to use technologies than enrolling in a traditional non-digital course. Considering education management information syste...

Purpose The purpose of this paper is to provide a better understanding of how post-adoption use of business intelligence system (BIS) affects firm performance. It develops and empirically tests a conceptual model for assessing the impact of BIS routine and innovative usage on firm performance the context of small and medium enterprises (SMEs). De...

Purpose The purpose of this paper is to investigate how citizens’ perception of empowerment can influence the intention to use and intention to recommend e-participation. Design/methodology/approach A research model is evaluated using structural equation modelling. An online survey questionnaire was used to collect data from 210 users of e-parti...

E-learning is a web-based learning ecosystem for the dissemination of information, communication, and knowledge for education and training. Understanding the impact of e-learning on society, as well as its benefits, is important to link e-learning systems to their success drivers. The aim of this study is to find the determinants of user perceived...

We show evidence on the influence of culture on m-banking use and individual performance, by using a combination of the task-technology fit (TTF) model and two of Hofstede's cross-cultural dimension scales: uncertainty avoidance and individualism. On the basis of a sample of 204 m-banking users, we show that individualism moderates the relationship...

Purpose The purpose of this paper is to further our knowledge of what influences users to adopt mobile augmented reality in tourism (MART). A conceptual model is proposed, combining the extension of Unified Theory of Acceptance and Usage of Technology (UTAUT2) with task technology fit (TTF), to explain behavioural intention and user behaviour of M...

The purpose of this paper is to define information privacy objectives based on values of individuals. The study is informed by the value-focused thinking approach that helps generate objectives for strategic decision makers. We employ a sequential mixed method approach in four phases. Phase 1 uses Value Theory to define individual values for inform...

The current study explores the digital divide by checking the phenomenon at the individual level. It digs into the individual pattern of adoption and use of a broad set of information and communications technologies (ICT) by introducing a conceptual model combining the extended unified theory of acceptance and use of technology (UTAUT2) and the fiv...

BACKGROUND The future of health care delivery is becoming more patient-focused, and electronic health record (EHR) portals are gaining more attention from worldwide governments that consider this technology as a valuable asset for the future sustainability of the national health care systems. Overall, this makes the adoption of EHR portals an impor...

Digital divide, the differential in access and use of information and communication technologies (ICT) represents an obstacle to the information society. This study proposes a new theoretical model based on the extended unified theory of acceptance, and use of technology (UTAUT2), Schwartz's basic values and ICT skills to explore the role of values...

Online participatory budget, an e-participation platform to engage citizens in decision-making processes, has become more popular in the last decade in several cities across Europe. Nevertheless, to assure its continuity of use and keep the citizens' engagement over time remains a challenge year by year for the local governments. This paper explore...

This article presents an analysis of the global digital divide, based on data collected from 45 countries, including the ones belonging to the European Union, OECD, Brazil, Russia, India, and China (BRIC). The analysis shows that one factor can explain a large part of the variation in the seven ICT variables used to measure the digital development...

Our work addresses the factors that influence the adoption of business analytics and intelligence (BAI) among firms. Grounded on some of the most prominent adoption models for technological innovations, we developed a conceptual model especially suited for BAI. Based on this we propose an instrument in which relevant hypotheses will be derived and...

The diffusion and adoption of e-participation contributes to better democracy and more participative societies. Nevertheless, despite the potential benefits of e-participation, the level of citizen satisfaction regarding the use of e-participation and its effects on the continued intention to use have not been widely assessed yet in the literature....

The purpose of this paper is to define information privacy objectives based on values of individuals. The study is informed by the value-focused thinking approach that helps generate objectives for strategic decision makers. We employ a sequential mixed method approach in four phases. Phase 1 uses Value Theory to define individual values for inform...

Purpose This study presents a model drawn on both the extension of the unified theory of acceptance and use of technology (UTAUT2) and the perceived value for explaining consumer behavior toward mobile hospitality services (MHS) from two perspectives: intention to use and recommendation. Design/methodology/approach The partial least square (PLS)...

In the last decade, the use of smartphones has grown steadily. The way consumers interact with brands has changed owing to the accessibility of internet connection on smartphones, and ubiquitous mobility. It is crucial to understand the factors that motivate consumers to interact with smartphone advertisements and therefore what stimulates their de...

Hereditary leiomyomatosis and renal cell cancer (HLRCC) is a rare genetic disorder in which the affected individuals tend to develop cutaneous leiomyomas, uterine leiomyomas, and renal cell cancer (RCC). Within the spectrum of this syndromic disease, RCC is the most severe manifestation, occurring at a younger age compared to the sporadic form. Pat...

Purpose The paper aims to provide a better understanding of the determinants of business intelligence system (BIS) adoption stages. It develops and empirically tests a conceptual model for assessing the determinants of BIS diffusion on the evaluation, adoption, and use stages in the context of small and medium enterprises (SMEs). Design/methodolo...

This article explores the main factors that drive the adoption of e-participation. A weight and meta-analysis was carried out from previous quantitative research studies related to individual e-participation adoption published in journals and conferences over the last 17 years. A total of 60 studies were used for the weight and meta-analysis. We id...

Background: The future of healthcare delivery is becoming more citizen centered, as today's user is more active and better informed. Governmental institutions are promoting the deployment and use of online services such as Electronic Health Record (EHR) portals. This makes the adoption of EHR portals an important field to study and understand. Ob...

Purpose The purpose of this paper is to develop and test a theoretical model to measure the impact of enterprise resource planning (ERP) and customer relationship management (CRM) systems and moderating relationships of system and process integration on business value. Design/methodology/approach ERP and CRM systems are analysed with the resourc...

Purpose Most empirical studies of m-banking seek to understand the factors and motivations that influence the adoption or behaviour intention. This paper focuses on analysing and synthesizing existing studies and makes recommendations to researchers and practitioners. Design/methodology/approach Few papers focus on the m-banking use and individu...

This paper analyzes the digital development of 110 countries and its relationship with economic development. Using factor analysis, we combined seven ICT-related variables into a single measure of digital development. This measure was then used as the dependent variable in an OLS model that allows non-linear effects, with the GDP per capita of coun...

Software as a service (SaaS) is a service model in which the applications are accessible from various client devices through internet. Several studies report possible factors driving the adoption of SaaS but none have considered the perception of the SaaS features and the organization’s context. We propose an integrated research model that combines...

Background: This study's goal is to understand the factors that drive individuals to adopt Electronic Health Record (EHR) portals and to estimate if there are differences between countries with different healthcare models. Methods: We applied a new adoption model using as a starting point the extended Unified Theory of Acceptance and Use of Tech...

Purpose: The purpose of this paper is to investigate the effects of Hall’s cultural dimension on the mobile banking (m-banking) individual performance in the m-banking post-adoption stage. Design/methodology/approach: This paper proposes using the DeLone and McLean IS success model moderated by Hall’s cross-cultural dimensions of high-low context a...

While technology and internet has a riveting presence for most in the urban settings and developed areas, it remains at a distant periphery for many in the under-served pockets of the world. To link the appropriation of ICT for development (ICT4D) in least developed countries (LDCs) and its achievement of the development goals, we propose a citizen...

Purpose The purpose of this paper is to identify the potential impact of the utilization of game mechanics and game design techniques in the acceptance of mobile banking services. Design/methodology/approach The theoretical model was tested in a quantitative study using structural equation modelling, conducted in Brazil, with actual local banking...

Prior research has found trust to play a significant role in shaping purchase intentions of a consumer. However there has been limited research where consumer trust dimensions have been empirically defined and tested. In this paper we empirically test a path model such that Internet vendors would have adequate solutions to increase trust. The path...

Enterprise Resource Planning (ERP) system literature reports little research on the specificities of an industry analysis. Based on a theoretical model we assess ERP Value between Manufacturing and Services industries in Small and Medium Enterprises (SMEs) across the Iberian region (Portugal and Spain). The empirical test was conducted through stru...

Enterprise Resource Planning (ERP) system literature reports few studies with a focus on specificities of an industry analysis. Based on the Technology-Organizational-Environment (TOE) framework and the Resource-Based View (RBV) theory, we present a theoretically developed research model aiming at measuring and examining determinants of ERP use and...

E-learning systems are emerging in many settings of our society. Schools, universities, and several other organizations use these systems. E-learning systems allow learning anytime and anywhere. This medium may seem to be the answer to all learning barriers, but the effect of non-cognitive skills on the success of e-learning systems is yet to be ex...