Citizens’ trust in a government is critical when the government utilizes Twitter to communicate with the public. This research collected 398 questionnaire samples from Korean citizens who communicate with a central government department via Twitter and employed a structured equation analysis. The study discovered that tweets coming from a leading (or an executive) government officer (e.g., a minister) played mediation role in increasing citizens’ perception of credibility in governmental Twitter feed. Furthermore, the citizens’ trust in governmental media functioned as a moderator for expanding their trust in government from an agency level to the overall government.

Preparing for a job can be difficult for undergraduates as this would be one of their first experiences of responsibility; obtaining a job will make them economically independent beings taking responsibility for their lives. Since the COVID-19 pandemic, this task has become even more challenging for Generation Z students, born in the mid-1990s, as they navigate a turbulent job market. This study aims to analyze undergraduates’ priority decisions regarding the criteria and activities of their career preparation. The study conducted a questionnaire analysis using the methodology of analytic hierarchy process (AHP) with 93 university students in the Republic of Korea. This research finds that students rank personal feelings of achievement as the most important criterion in their career preparation. They perceive extracurricular activities and internships as the most beneficial experiences for job readiness. On the contrary, networking activities within the university and with alumni received the least importance. These results highlight a need for universities to innovate their educational approach. Addressing the gap between current curricula and student needs and enhancing self-efficacy among students are critical. Innovative educational strategies could be a key to meeting societal expectations, such as the integration of business and technology, and catering to the unique learning needs of Generation Z. This becomes particularly relevant considering the rise of new career paths, such as youth startups, leveraging advanced technologies.

The present research analyzes the diversification effect in 15 OECD countries’ energy consumption and their import source of crude oil against annual price changes (1984–2010) in crude oil. The study establishes a multivariate panel equation including factors relevant to the price changes (e.g., national economic variables and major socioeconomic events) for econometric estimation of system generalized method of moments. The research finds that a country’s two concentration levels of energy utilization (i.e., energy consumption and import dependence for crude oil) have positive effects on the annual price changes in crude oil. The result suggests empirical support for energy diversification policies in other countries.