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The evolution of social commerce (s-commerce) has changed both businesses and customers. Therefore, understanding customer engagement behaviour in the s-commerce context has become a key competitive advantage for companies that aim to build a customer-centric business. The purpose of this study is to provide an in-depth review of customer engagement studies in the context of s-commerce. This study used a systematic literature review approach on customer engagement studies in the context of s-commerce. The results show that social theories and factors play a significant role in customer engagement along with technological factors. More importantly, drawn from the review results, a research framework was developed to show the factors that provide the greatest influence in customer engagement behavior.

PurposeWhile there is an abundant amount of literature studies on mobile payment adoption, there is a scarce of knowledge concerning the sustainable use of mobile payment contactless technologies. As those technologies are mainly concerned with security and users' trust, the question of how security factors and trust can influence the sustainable use of those technologies within and beyond the COVID-19 pandemic is still unanswered. This research thus develops a theoretical model based on integrating the protection motivation theory (PMT) and the expectation-confirmation model (ECM), extended with perceived trust (PT) to explore the sustainable use of mobile payment contactless technologies.Design/methodology/approachThe developed model is evaluated based on data collected through a web-based survey from 523 users who used contactless payment technologies. Unlike the existing literature, the collected data were analyzed using a hybrid structural equation modeling-artificial neural network (SEM-ANN) technique.FindingsThe data analysis results reinforced all the proposed relationships in the developed model. The sensitivity analysis results showed that PT has the largest impact on the sustainable use of mobile payment contactless technologies with 97.2% normalized importance, followed by self-efficacy (SE) (77%), satisfaction (72.1%), perceived vulnerability (PV) (48.9%), perceived usefulness (PU) (48.2%), perceived severity (PS) (40.7%), response efficacy (RE) (28.7%) and response costs (RCs) (24.1%).Originality/valueThe originality of this research lies behind the development of an integrated model based on PMT and ECM to understand the sustainable use of mobile payment contactless technologies. The study provides several managerial implications for decision-makers, policy-makers and service providers to ensure the sustainability of those contactless technologies within and beyond the COVID-19 pandemic.

This paper present a review of the challenges of e-learning in Nigerian University

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