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• South Korea's shared mobility services can be described as a case of transition failure. • Failed niche from transition failure triggers to reinforce regime stability through regime actors' networks, institutional inertia, and the imprinting effect. • Transition failure should be considered to provide adequate regulatory intervention. From the aspect of socio-technical transitions, South Korea's shared mobility services can be described as a case of transition failure. In extant studies, transition failure has mostly been treated at the regime level, and the effects of a failed niche have been often ignored as if they do not impact the established system. Although the impact of failed niches is inconsequential compared to that of successful niches, regime actors can still interact and reinforce mutual stability within the existing regime and make either a positive or a negative impact even after the failed niches disappear. This study explains the effects of the failed niche, which attempted transition to a new socio-technical system, from a novel perspective. By revisiting the triple embeddedness framework, South Korea's shared mobility market has been selected as the representative case for transition failure. We find that failed shared mobility services in South Korea affecting regime stability through regime actors' networks, institutional inertia, and the imprinting effect. Our results highlight the significance of transition failure and provide adequate regulatory intervention to overcome regime barrier. [ABSTRACT FROM AUTHOR]

• Significant role of trust in citizens and government in aiding preventive actions against COVID-19. • Perceived characteristics of online news media influence preventive actions through trust in citizens and government. • Perceived characteristics of social media influence preventive actions through trust in citizens. Infodemic, the spread of false information during the COVID-19 pandemic, has been raised as one of the major concerns aggravating the confusion in the global society. In this regard, the role of media as an information channel in delivering the reliable information and motivating the active participation of citizens in complying with government's preventive actions becomes much more important. In this study, the role of online news and social media on people's preventive actions considering the role of trust in citizens and government from the perspective of social capital is investigated. For the empirical study, a structural equation modeling is employed by using survey material gathered from South Korea in the early days of the COVID-19 outbreak. South Korea was selected as its COVID-19 prevention strategy focused not only on the provision of medical support, but also on the enhancement of social trust through active engagement with people through media channels. Our results reveal that the perceived characteristics of online news and social media influence preventive actions through the trust in citizens or in government. In addition, while online news media enhances trust in both the citizens and the government, social media only influences trust in citizens. Based on our findings, the role of media in preventing the spread of COVID-19 is dicussed. [ABSTRACT FROM AUTHOR]