期刊：
Environmental Science and Pollution Research,2023年30(19):55187-55199 ISSN：0944-1344
通讯作者：
Wei, Wei
作者机构：
[Wang, Zhi; Li, Kangjia; Wei, Wei; Huang, Wenmin] Cent China Normal Univ, Sch Econ & Business Adm, Wuhan 430079, Peoples R China.;[Huang, Wenmin] China Chengtong Holdings Grp Ltd, Beijing 100031, Peoples R China.;[Wei, Wei] Cent China Normal Univ, Ctr Low Carbon Econ & Environm Policy, Wuhan 430079, Peoples R China.;[Liu, Zhen] Nanjing Normal Univ, Sch Business, Nanjing 210023, Peoples R China.
通讯机构：
[Wei, Wei] S;School of Economics and Business Administration, Central China Normal University, Wuhan, 430079, China.;Center for Low Carbon Economy and Environmental Policy, Central China Normal University, Wuhan, 430079, China.
关键词：
High-speed rail;COD emission intensity;Firm heterogeneity;Difference in difference model
期刊：
Journal of Leadership & Organizational Studies,2023年30(2):187-204 ISSN：1548-0518
通讯作者：
Liu, Wenxing
作者机构：
[Chen, Silu] Cent China Normal Univ, Sch Econ, Wuhan, Hubei, Peoples R China.;[Chen, Silu] Cent China Normal Univ, Business Adm, Wuhan, Hubei, Peoples R China.;[Zhu, Yanghao] Huazhong Univ Sci & Technol, Sch Management, Wuhan, Hubei, Peoples R China.;[Guo, Li] Univ Int Business & Econ, Sch Business, Beijing, Peoples R China.;[Liu, Wenxing] Zhongnan Univ Econ & Law, Sch Business Adm, Wuhan, Hubei, Peoples R China.
通讯机构：
[Liu, Wenxing] Z;Zhongnan Univ Econ & Law, Sch Business Adm, Wuhan, Hubei, Peoples R China.
关键词：
leader gratitude expressions;role breadth self-efficacy;perceived social worth;proactive behaviours;relational identification
摘要：
Journal of Leadership & Organizational Studies, Volume 30, Issue 2, Page 187-204, May 2023. <br/>Researchers have become increasingly interested in exploring leaders’ behaviours that promote followers’ proactive behaviours, but the literature is limited to leadership styles and generally does not consider leader displays of emotion. In this study, the impact of leader expressions of gratitude on followers’ proactive behaviours was examined from a self-evaluative perspective. Data from a field study (N = 184) and an experimental vignette study (N = 150) in China supported our hypotheses that leader gratitude expressions were positively related to followers’ proactive behaviours. Role breadth self-efficacy and perceived social worth mediated the relationship between leader gratitude expressions and followers’ proactive behaviours. This mediating effect was strengthened for followers with high relational identification. These results contribute to a nuanced understanding of gratitude by shedding light on the phenomenon of leader gratitude expressions and their positive outcomes. The theoretical and practical implications of our findings are discussed.
作者：
Su, Kuangxi;Yao, Yinhong;Zheng, Chengli;Xie, Wenzhao
期刊：
International Review of Economics & Finance,2023年83:35-50 ISSN：1059-0560
通讯作者：
Chengli Zheng
作者机构：
[Zheng, Chengli; Su, Kuangxi] Cent China Normal Univ, Sch Econ & Business Adm, Wuhan, Hubei, Peoples R China.;[Zheng, Chengli; Su, Kuangxi] Cent China Normal Univ, Financial Engn Res Ctr, Wuhan, Hubei, Peoples R China.;[Yao, Yinhong] Capital Univ Econ & Business, Sch Management & Engn, Beijing, Peoples R China.;[Xie, Wenzhao] Changjiang Secur Co Ltd, Wuhan, Hubei, Peoples R China.
通讯机构：
[Chengli Zheng] S;School of Economics and Business Administration, Central China Normal University, China<&wdkj&>Financial Engineering Research Center, Central China Normal University, China
摘要：
Effective and robust crude oil hedging strategies are becoming increasingly important for investors. However, due to the differences between data characteristics, the choice of model usually has a significant impact on hedging performance, and an incorrect model can make the hedging performance less efficient and robust. In this paper, a novel hybrid hedging model is proposed to reduce the model uncertainty. In detail, different hedging models are combined to construct a hybrid. Then, the maximum percentage reduction of the hybrid is selected as the optimization target to derive optimal hedge ratios and combination weights. The essence of the hybrid hedging model is to choose a better one among different strategies. In the empirical analysis, we construct the hybrid model by combining three single models: parametric, nonparametric, and semiparametric minimum-CVaR hedging models. The empirical results show that the novel hybrid model significantly outperforms other four competitive models in return, Sharpe ratio, maximum drawdown and downside volatility, while slightly outperforms other competitors in CVaR reduction. The robustness tests by changing the window width, confidence level, data frequency, empirical data, and objective function to be optimized validate the above conclusions.
期刊：
International Journal of Energy Research,2023年2023 ISSN：0363-907X
作者机构：
[Cheng, Fei] Zhejiang Huayun Informat Technol Co Ltd, Hangzhou, Peoples R China.;[Wei, Cong] Zhejiang Univ Finance & Econ, Sch Econ, Hangzhou, Peoples R China.;[Wei, Cong] Springfield Coll, Springfield, MA USA.;[Tang, Tian; Kong, Jiayang] Cent China Normal Univ, Sch Econ & Business Adm, Wuhan, Peoples R China.;[Tang, Tian; Kong, Jiayang] Cent China Normal Univ, Sch Math & Stat, Wuhan, Peoples R China.
摘要：
In recent years, the Chinese Central Government has put great emphasis on the marine economy, since it has been a new driving force of the national economic development. Yet, the relationship between marine economic development and energy efficiency remains unknown. In this paper, we investigate whether marine economic development affected energy efficiency. We focused on the Zhoushan Archipelago, the first National New Area for marine economic development in China. We applied panel data approach to construct the counterfactual of Zhoushan Archipelago. We compared Zhoushan and its counterfactual, the synthetic Zhoushan, and viewed the difference between them, after the Zhoushan Archipelago New Area, as the impact of marine economic development on energy efficiency. We found that compared with its counterfactual, the real Zhoushan had a more substantial improvement in energy efficiency after the National New Area construction. We estimated that the construction of the National New Area for Marine Economy increased energy efficiency by about 10 percentage points. We also applied the bootstrapping technique to illustrate the significance of the estimated results. The results suggest that the Zhoushan Archipelago New Area construction had a statistically significant impact on energy efficiency. In addition, we conducted two tests, including leave-one-out tests and permutation tests, to check the robustness of estimated results, which also serve as an illustration of significance of the estimated results from an alternative empirical perspective. The results from these two tests are similar to each other, both indicating that the Zhoushan Archipelago New Area construction had a statistically significant positive impact on energy efficiency. Overall, our results suggest that marine economic development had a sizable improvement in energy efficiency.
