This paper develops a unified theory integrating the three pillars of the pension system—public, occupational, and private pensions—within a heterogeneous-agent overlapping generations (OLG) model. By incorporating income heterogeneity and institutional features unique to each pillar, the model captures how individuals across the income distribution participate in the pension system and derive utility. We characterize the distinct yet interactive roles of each pillar in providing risk sharing and retirement security and identify fundamental trade-offs in pension design. Our model provides a laboratory for analyzing the coordination of the three pillars that aims at enhancing equity and fiscal sustainability.
This study aims to identify the associations between teacher mental health and student mental health. Cross-sectional data were collected from 127,877 students aged 9–20 years and 2,759 teachers across 31 provinces in China. The mental health of students and teachers were assessed by well-being (life satisfaction and positive mental health), and psychological distress (depression and anxiety). Controlling for demographic variables, multilevel regression analyses suggest that higher teacher positive mental health was linked to higher student positive mental health and lower student depression; higher teacher depression were correlated with higher student depression; and teacher life satisfaction and anxiety were not correlated with any indicators of student mental health. The study highlights the significant association between teacher mental health and student mental health.
Trust in artificial intelligence (AI) has become a central issue due to the opacity and unpredictability of AI decision-making processes. However, existing studies often produce inconsistent results and fail to provide a unified understanding of the underlying factors, making a comprehensive review necessary. To address this gap, we conducted a systematic review of 562 empirical studies to explore the antecedents and consequences of human trust in AI. The review identified key antecedents of trust, including AI capability, anthropomorphism, individual factors, and explainability, and associated consequences, such as behavioral intention, attitude, and acceptance. A cross-cultural analysis revealed significant differences in how cultural contexts influence the perception and prioritization of factors, such as capability, transparency, and anthropomorphism. These findings emphasize the need for a multidimensional approach to developing trustworthy AI systems, highlighting the importance of cultural sensitivity in AI design. The review also suggests several promising avenues for future research, including dynamic trust formation, reciprocal trust relationships, and the evolution of trust over time. Addressing these areas will enhance our understanding of trust in AI and contribute to the development of culturally adapted and ethically sound AI technologies.
Two-dimensional (2D) van der Waals ferroelectric materials have emerged as promising candidates for miniaturized devices due to their atomically thin structures and unique ability to maintain ferroelectricity even at reduced dimensions. Recent research indicates that the interfacial barriers between semiconductors and ferroelectrics can be modulated by polarization charges, with ferroelectric polarization—reversible by an external electric field—playing a crucial role in the switchable diode effect. In this work, we investigate a room-temperature switchable ferroelectric diode (Fe-diode) based on a MoS2/α-In2Se3 heterojunction. The out-of-plane ferroelectric properties of the α-In2Se3 layer enable efficient modulation of the Schottky barriers at the MoS2/α-In2Se3 interface through external voltage application, thereby achieving a notable switchable diode effect with a nonlinearity of up to 934. By exploiting the inherent nonlinearity, the ferroelectric diode can effectively generate complex signal waveforms, making it highly suitable for secure communication systems. These findings make the ferroelectric diode a potential candidate for enhancing confidentiality in future communication technologies, protecting data against eavesdropping and unauthorized access.
The global knowledge asymmetries are increasingly interrogated by non-Western humanities and social sciences (HSS) scholars whose research is anchored in local contexts yet must adhere to international (Western) standards. Under this circumstance, the study aims to examine how the cultural self-awareness of non-Western HSS scholars is manifested in research through a Chinese lens. Based on previous theoretical perspectives and Fei Xiaotong’s theory of cultural self-awareness, the study first constructs two analytical dimensions: academic self-reflexivity and cultural appreciation attitudes. It then performs a qualitative investigation including 28 Mainland Chinese HSS scholars through interviews and literature analyses. The findings highlight key principles for academic self-reflexivity, namely reflecting on intellectual extraversion, dichotomous thinking, and the reemphasis on Chinese culture and knowledge. The cultural appreciation attitudes are also elaborated, which are embodied in the recognition and revaluation of traditional Chinese knowledge, the continued appreciation of modern Western knowledge, and the synthesis of different cultures and knowledge in research. These findings develop Fei’s cultural self-awareness theory and add new discourses to address global knowledge imbalances, promoting a more diverse and inclusive global higher education landscape.