Keyi Duan

Keyi Duan

*This is an algorithmically generated author record based on publicly available information.

Current Organizations / Institutes

The organizations/institutes from the scholar's latest article


Keyi Duan has a total of 14 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Implementation of African Swine Fever Biosecurity and Post-Outbreak Recovery in Vietnam, Malaysia, and the Philippines

    by Keyi Duan, Ting Lin, Zengyong Zhu, Karma Rinzin, Ashish Sutar, Waroonsiri Charoenlarp

    African swine fever (ASF) continues to disrupt pig production in Southeast Asia. Control measures and conditions for recovery vary across production systems. This qualitative multiple-case study examined 24 purposively selected production units in Vietnam (n = 8), Malaysia (n = 12), and the Philippines (n = 4). Government and partner institutions facilitated access to the units. Face-to-face interviews and field notes collected between August 2025 and February 2026 were analysed alongside policy documents. National statistics described changes in pig inventories and output. In Vietnam, live-weight pig output in 2024 exceeded the 2018 level, although the national herd remained smaller. Recovery varied among the sampled units, with greater structural investment in integrated enterprises than in family farms. In Malaysia, nine sampled farms were operating, several were undergoing substantial upgrades, and three remained depopulated while awaiting approval to restock. In the Philippines, one commercial unit reported coordinated control measures and household measures. The three programme-linked backyard units relied on household measures and project support. Gaps in transport, reporting, disposal, and restocking arrangements limited the reach of farm-level measures across the cases.

  • Open Access

    Transformation and Sustainable Development of China’s Pig Industry in the Post-African Swine Fever Era: A One Health Perspective

    by Ting Lin, Zengyong Zhu, Keyi Duan, Yakun Huang

    The 2018 African swine fever (ASF) outbreak disrupted China’s pig industry but spurred transformations in production, organisation, and governance. Using the One Health framework, this study examines post-ASF dynamics across animal health, environmental sustainability, public health, and economic sustainability. The findings indicate the following: (1) Policy, investment, biosecurity, and digital tech enabled rapid production recovery, yet the growth rate of production has significantly outpaced that of consumption, raising periodic overcapacity risks. (2) The shift from farrow-to-finish to specialised, large-scale operations improves efficiency and risk control but intensifies environmental pressure. (3) Digital tools and biosecurity promote precision and health-oriented farming. (4) Key sustainability challenges include crop–livestock decoupling, low manure utilisation, animal welfare gaps, and antimicrobial stewardship. The analysis reveals that while economic sustainability has driven rapid capacity recovery, it increasingly conflicts with environmental and animal health objectives. Therefore, the future pathways should adopt One Health to integrate capacity optimisation, green recycling, biosecurity governance, and digital transformation, balancing economic returns, animal health, environmental protection, and public health security.

  • Open Access

    The Impact of Overinvestment on Environmental, Social and Governance Ratings: Evidence from Chinese Corporations

    by Mingyao Cao, Keyi Duan, Mingyu Cao, Haslindar Ibrahim

    In an era where sustainability practices face increasing global scrutiny, understanding how investment decisions impact ESG ratings is essential. This study examines the relationship between corporate overinvestment and ESG ratings using data from Chinese corporations between 2012 and 2020. Employing fixed effects models for empirical analysis, the results reveal a significant negative relationship between overinvestment and ESG ratings, particularly affecting the social aspect. These findings highlight the importance of efficient investment management in enhancing corporate ESG performance. The study provides valuable insights for corporations aiming to optimise resource allocation to improve their sustainability outcomes.

  • Open Access

    Exploring the Interrelationships between Public Health, Fiscal Decentralization, and Local Government Debt in China

    by Mingyao Cao, Keyi Duan, Mingyu Cao, Haslindar Ibrahim

    This paper investigates the interrelationships among local government debt, fiscal decentralization, and public health. The investigation begins by constructing a theoretical model to analyze the inherent connections between these variables. Subsequently, an empirical analysis is conducted using data from China between 2015 and 2021. The findings demonstrate a bidirectional relationship between fiscal decentralization, local government debt, and public health. Specifically, it is observed that an increase in local government debt has adverse effects on both fiscal decentralization and public health, while fiscal decentralization has a positive impact on public health. These insights are consistently validated through rigorous regression methodologies, affirming the robustness and significance of these relationships.


  • Open Access

    Local Government Debt and Its Impact on Corporate Underinvestment and ESG Performance: Empirical Evidence from China

    by Mingyao Cao, Keyi Duan, Haslindar Ibrahim

    ESG ratings are closely linked to corporate resource allocation and overarching macroeconomic constituents. Nevertheless, there is a noticeable lack in the literature investigating the interconnected relationship between the growth of local government debt, corporate underinvestment, and ESG ratings. This study aims to investigate the impact of local government debt on corporate underinvestment and its subsequent effects on corporate ESG performance. To achieve this goal, this study utilizes special bond data from Chinese provinces spanning the period between 2015 and 2021. The findings suggest that as local government debt swells, it imposes financing constraints on local companies, leading to underinvestment, particularly for listed companies with a high proportion of fixed assets and non-state-owned enterprises. A key effect is a “crowding-out effect” in which local government debt absorbs resources that could otherwise be allocated to private corporations and non-investment sectors. This trend illuminates the concealed costs of a debt-reliant growth model extending beyond the financial sector to impact broader corporate behavior and ESG performance. Our research suggests that government debt, corporate financing constraints, and ESG investment are intimately linked. The study concludes with policy implications and recommendations aimed at mitigating the investment gap in Chinese enterprises and promoting sustainable economic growth.


  • Retracted
    Open Access

    Exploring the Influence of Local Government Debt on Enterprise Investment through the Empirical Evidence at the Municipal Level

    by Mingyao Cao, Keyi Duan, Haslindar Ibrahim

    The data of new urban investment bonds in cities from 2011 to 2021 to represent the growth of local government debt is used in this article. This paper studies the relationship between the increase of local government debt and the underinvestment of A-share listed enterprises, which are nonfinancial companies in China. The research finds that the increase in local government debt will crowd out the debt financing of enterprises and then significantly the degree of underinvestment of enterprises, which is represented non-state-owned enterprises, enterprises with high financing constraints, and enterprises with nonlocal debt invested in the industry. As for listed enterprises with relatively low fixed assets, the increase in local debt will further lead to the degree of underinvestment. The above conclusions remain unchanged after a series of robustness tests in this paper. Further research shows that the increase in local government debt will weaken the stimulus effect of loose monetary policy and thus affect the underinvestment of enterprises. This paper expands the research on the factors affecting the underinvestment of enterprises and deepens the research on the consequences of the influence of local government debt on the economic activities of microsubjects.


  • Open Access

    The Relationship between Trade Liberalization, Financial Development and Carbon Dioxide Emission—An Empirical Analysis

    by Keyi Duan, Mingyao Cao, Nurhafiza Abdul Kader Malim

    In recent years, the global economy has become more closely related among countries, and people’s pursuit of economic growth has caused the destruction of the environment. This paper selected panel data from 30 provinces in China from 1997 to 2020 to investigate the dynamic relationship between trade liberalization, financial development and carbon dioxide emissions by constructing a PVAR model. We also consider technology as an important variable for studying the effect on carbon dioxide emissions. We draw the following conclusions. First, financial development promotes carbon dioxide emissions, while trade liberalization has no significant impact on carbon dioxide emissions. Second, China’s trade liberalization promotes financial development, which has limited support for international trade. Third, there is a two-way causal relationship between financial development and carbon dioxide emissions, and there is also a two-way causal relationship between trade liberalization and financial development. Finally, there is a significant inverted “U” curve relationship between trade liberalization and innovation efficiency, environmental regulation and innovation. According to the results, we believe that openness to trade impacts emissions of carbon dioxide, opening a new function path: namely, trade openness and financial development result in high carbon dioxide emissions; consequently, China has relied on this process in the development of their financial system.