期刊：
International Journal of Computer Mathematics,2021年98(7):1327-1348 ISSN：0020-7160
通讯作者：
Yu, Xing
作者机构：
[Zheng, Chengli; Wang, Xinxin; Yu, Xing] Cent China Normal Univ, Sch Econ & Business Adm, Wuhan 430079, Peoples R China.;[Zhang, Weiguo] South China Univ Technol, Sch Business Adm, Guangzhou, Peoples R China.
通讯机构：
[Yu, Xing] C;Cent China Normal Univ, Sch Econ & Business Adm, Wuhan 430079, Peoples R China.
摘要：
As an environmental protection fuel, methanol is widely used in national economy. The tremendous price fluctuation of methanol makes risk avoidance an important issue. However, traditional normal hypothesis in the existing literature underestimates the potential risk and leads to an inefficient hedging strategy, so we studied hedging strategy with methanol futures contracts based on the skewed normal hypothesis. Considering that copula methods allow us to construct a flexible multivariate distribution when solving the problem of asymmetry and nonlinearity, the dependence structure between spot and futures return is modelled through copula functions in this paper. Since likelihood equations do not have explicit solutions in the context of skewed normal, Genetic Algorithm is used to estimate the parameters of a skew normal distribution. To deal with the complexity of the proposed model, the artificial bee colony algorithm is adopted to search for the optimal solutions. Empirical results show that skewed normal distribution can represent the distribution characteristics of return better and improve the hedging effectiveness. Gaussian copula describes the dependence structure of spot and futures quite well. The algorithms designed to obtain the parameters in the marginal distributions and to find the optimal hedge ratio are effective and feasible.
摘要：
Accurate electricity consumption forecasting plays a crucial role in electric power systems and is a challenging task due to its complicated mechanism induced by multiple influential factors. To address this problem, this paper develops a novel nonhomogeneous discrete grey model that considers seasonality by introducing a seasonal index into the fractional accumulation generation operator, which is abbreviated as SFNDGM. In addition, the introduction of a one-step ahead rolling mechanism can further improve its prediction performance. To enhance the efficacy, the particle swarm optimization (PSO) algorithm is employed to determine the fractional accumulation order. Subsequently, to demonstrate the effectiveness and superiority of the rolling SFNDGM model, this model is applied to simulate and predict Hubei & rsquo;s quarterly electricity consumption from 2010Q4 to 2019Q3. The numerical results show that the proposed rolling model has a better performance than the other benchmark models. Therefore, the optimal model is utilized to predict Hubei & rsquo;s quarterly electricity consumption by 2021, inferring that electricity consumption will continue to increase in the coming years. Based on the attained forecasts, several suggestions are put forward to promote the sustainable development of Hubei & rsquo;s electricity consumption. (c) 2021 Elsevier Ltd. All rights reserved.
期刊：
International Journal of Environmental Research and Public Health,2021年18(7) ISSN：1661-7827
作者机构：
[Zhang, Yu; Chen, Silu; Liang, Lili] Cent China Normal Univ, Sch Econ & Business Adm, Wuhan 430079, Hubei, Peoples R China.;[Shen, Tao] Macau Univ Sci & Technol, Inst Sustainable Dev, Macau, Peoples R China.
关键词：
paradoxical leadership;job crafting;career resilience;task performance;self-regulation theory
摘要：
As an emerging Chinese indigenous leadership style, paradoxical leadership has received considerable attention from researchers. Many studies have demonstrated the positive impact of paradoxical leadership on employees, teams, and organizations; however, there is less information on how paradoxical leaders influence their own work outcomes. On the basis of self-regulation theory, in this study, we examined the impact of paradoxical leadership on leaders' task performance. In addition, we investigated the mediating effects of job crafting and career resilience on this relationship. Through a survey of 120 leaders and 271 of their immediate followers, our empirical analysis found the following: (1) paradoxical leadership was positively related to leaders' task performance, (2) job crafting mediated the relationship between paradoxical leadership and leaders' task performance, and (3) career resilience positively moderated the relationship between paradoxical leadership and job crafting, and had an indirect effect on task performance through job crafting. Our model offers novel insights into the paradoxical leadership literature and implications for improving leaders' job crafting and task performance.
期刊：
International Journal of Environmental Research and Public Health,2021年18(8):4056- ISSN：1661-7827
通讯作者：
Wanxing Jiang
作者机构：
[Chen, Silu] Cent China Normal Univ, Sch Econ & Business Adm, Wuhan 430079, Peoples R China.;[Jiang, Wanxing] Shanghai Lixin Univ Accounting & Finance, Sch Business Adm, Shanghai 201620, Peoples R China.;[Li, Xin] Wuhan Univ, Sch Urban Design, Wuhan 430072, Peoples R China.;[Li, Xin] Xiamen Univ, Sch Architecture & Civil Engn, Xiamen 361005, Peoples R China.;[Gao, Han] Donghua Univ, Coll Fash & Design, Shanghai 200051, Peoples R China.
通讯机构：
[Wanxing Jiang] S;School of Business Administration, Shanghai Lixin University of Accounting and Finance, Shanghai 201620, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
perceived green HRM;green psychological climate;harmonious environmental passion;voluntary workplace green behavior;green creativity
摘要：
Drawing on cognitive-affective system theory, this study proposes that employees' perceived green human resource management (HRM) influences their' workplace green behaviors through two psychological processes: the cognitive and the affective route. By analysing 358 questionnaires collected from Chinese firms in the oil and mining industry, we obtain evidence in support of our predictions, finding that employees' perceived green HRM positively impacts their voluntary workplace green behaviors and green creativity. Additionally, green psychological climate and harmonious environmental passion are found to partially mediate the relationship between employees' perceived green HRM and voluntary workplace green behavior while harmonious environmental passion is found to fully mediate the relationship between employees' perceived green HRM and green creativity. These findings shed light on the importance of green HRM in shaping employees' proactive workplace green behaviors and uncover how green HRM transforms employees' cognitive, affective, and motivational (CAM) factors into green actions.
关键词：
consumer fit uncertainty;fit revelation;mixed pricing strategy;switchers and nonswitchers
摘要：
When firms launch new products, consumers may be uncertain about whether these products fit their individual preferences before they have any personal experience with them. Such consumer fit uncertainty is very common for products sold online. To resolve this uncertainty, firms may provide fit-revelation sampling along with competitive pricing depending on their competitors' strategies. In this paper, we formulate a game-theoretical model to study the fit-revelation sampling strategies for two competing firms of substitute products in a market consisting of switchers and nonswitchers. We derive equilibrium sampling and pricing strategies and provide conditions under which the two firms adopt symmetric or asymmetric sampling strategies. Our analysis provides possible explanations on why different sampling strategies are observed among competing firms in practice. We show that fit-revelation sampling can be an important market differentiation tool. Adopting asymmetric sampling strategies, the two firms can take advantage of the market differentiation effect to avoid head-on competition and make both of them better off. Counter-intuitively, the profits of both firms can be increasing in the degree of competition (i.e., the size of switchers), and decreasing in the size of nonswitchers. We also provide new insights on the cause of price dispersion for competing firms facing consumer fit uncertainty. This would help firms to adjust their promotion strategies in accordance with their sampling campaigns. We extend the model to consider a more general case in which firms have different sizes of nonswitchers. We show that the firm with a larger size of nonswitchers is more willing to provide fit-revelation sampling if the benefit from dropping low-value consumers through sampling is large. Targeted sampling and pricing strategies are further examined in this paper. We show that firms always prefer asymmetric sampling strategies when targeting the group of switchers.
期刊：
Energy Economics,2021年99:105292 ISSN：0140-9883
通讯作者：
Zhu, Junpeng(junpzhu@sina.com)
作者机构：
[Lin, Boqiang] School of Management, China Institute for Studies in Energy Policy, Collaborative Innovation Center for Energy Economics and Energy Policy, Xiamen University, Fujian;361005, China;[Zhu, Junpeng] School of Economics and Business Administration, Central China Normal University, Wuhan, China;[Lin, Boqiang] 361005, China
通讯机构：
[Junpeng Zhu] S;School of Economics and Business Administration, Central China Normal University, Wuhan, PR China
期刊：
E3S Web of Conferences,2021年235 ISSN：2267-1242
作者机构：
[Zhang Y.] School of Business, Nanfang College of Sun Yat-sen University, Guangzhou, China;[Yixin Y.] School of Economics and Business Administration, Central China Normal University, Wuhan, China
会议名称：
2020 International Conference on New Energy Technology and Industrial Development, NETID 2020
摘要：
How to evaluate the comprehensive costs and benefits of urban light trains is a critical issue. The difference-in-differences technique is widely used in the literature. However, the conventional approach assumes the project does not affect the control group, which might be violated in real life due to social and economic interactions. We refine the DID approach and relax the no-spillover assumption. Through an example of impacts of a new light rail transit on house prices in Edmonton, Canada, we illustrate how the approach can be used to calculate three different treatment effects. The results indicate that the train system has negative impacts on values of single-detached houses nearby the train stations, and the negative effects also spill over to properties outside the treatment zone. Our findings show that the direction and magnitude of project impacts depend on the city size, the design of the train system, and relevant neighborhood characteristics.
