The employment and wage effects of export VAT rebates: evidence from China

Review of World Economics - This paper studies the employment and wage effects of VAT rebates to exporters with comprehensive firm-product-level data of China. It is found that the adjustments in...     

考虑碳交易的风电-抽水蓄能联合运行模式优化研究

随着"碳达峰—碳中和"的双碳目标成为国家战略,如何快速高质量的发展清洁能源成为亟待解决的问题.本文从经济性和碳排放两个角度研究了风电-抽水蓄能联合运行系统的综合效益,建立了包括风电-抽水蓄能联合运行系统建设成本、运维成本、备用成本和风电消纳成本四个成本指标以及联合运行效益、削峰填谷效益、网损改善效益和附加效益四个效益指标的风电-抽水蓄能联合运行系统综合效益模型.同时,以风电-抽水蓄能联合运行系统的综合效益最大化为目标,基于低碳交易规则,提出了风电-抽水蓄能联合运行系统优化运行模式.最后,选取了IEEE 14节点系统对模型进行测试,验证了优化方法的有效性.     

Ⅶ度区桥梁抗震防落梁装置施工技术

桥梁结构在强震作用下一般上部构造和下部构造间产生大的相对滑移,当实际的相对滑移量超过桥梁的实际防止落梁的长度的时候,将发生落梁等事故,致使交通发生中断,给抗震救灾工作带来极其严重的阻碍.本文结合贵州省罗望高速第七合同段项目,论述了地震Ⅶ度区桥梁抗震减隔震装置施工技术,并辅以工程实例进行说明,有效预防并减轻地震作用对桥梁构造的破坏,旨在为Ⅶ度抗震区的桥梁防震施工提供一定程度的参考.     

考虑碳交易的风电-抽水蓄能联合运行模式优化研究

随着"碳达峰—碳中和"的双碳目标成为国家战略,如何快速高质量的发展清洁能源成为亟待解决的问题.本文从经济性和碳排放两个角度研究了风电-抽水蓄能联合运行系统的综合效益,建立了包括风电-抽水蓄能联合运行系统建设成本、运维成本、备用成本和风电消纳成本四个成本指标以及联合运行效益、削峰填谷效益、网损改善效益和附加效益四个效益指标的风电-抽水蓄能联合运行系统综合效益模型.同时,以风电-抽水蓄能联合运行系统的综合效益最大化为目标,基于低碳交易规则,提出了风电-抽水蓄能联合运行系统优化运行模式.最后,选取了IEEE 14节点系统对模型进行测试,验证了优化方法的有效性.     

绿色信贷政策如何影响重污染企业技术创新?

完善绿色信贷等绿色金融政策框架和激励机制,对于推动经济绿色发展、实现碳达峰碳中和目标至关重要.本文以《绿色信贷指引》(简称《指引》)的出台为准自然实验,以2009-2018年A股上市公司的数据为样本,运用双重差分法考察绿色信贷对重污染企业技术创新的影响.实证结果显示,《指引》出台后,与其他行业企业相比,重污染企业的技术创新产出显著降低.机制检验显示,《指引》通过降低重污染企业的研发投入,进而抑制了企业的技术创新,未能发挥"波特效应".此外,政策引致的信贷约束效应与信息传递效应减少了重污染企业可获得的信贷资源与商业信用,导致技术创新水平下降.进一步分析表明,《指引》对重污染企业创新能力的作用表现出明显的异质性:与国有企业相比,非国有企业受政策影响更显著;与东部地区相比,这种抑制作用在中西部地区的重污染企业中表现的更明显;与弱融资约束企业相比,强融资约束企业受政策影响更显著.以上基于中国经济实践的证据,对于完善绿色信贷政策的资源配置作用、促进低碳经济发展具有一定的借鉴意义.     

Covid-19-tested food labels

While the transmission of virus SARS-CoV-2 via food is rare, some Chinese food retailers are considering a Covid-19-tested food label. However, how consumers may support such a label is unknown. We quantify Chinese consumers’ willingness to pay (WTP) for food carrying a Covid-19-tested label using an online choice experiment. We find that the WTPs for such a label are always positive for all food products considered. The amount of WTP depends on the entities authenticating the labels, country of origin of the food, and consumers’ socio-demographic status. Contrary to expectation, the knowledge on Covid-19 does not affect consumer preferences for the Covid-19-tested food labels. Our benefit and cost analysis suggests a possible large benefit of creating and administering a Covid-19-tested food label. This study provides insights for policymakers, global food manufacturers, and retailers to create marketing strategies to alleviate consumer food safety concerns associated with Covid-19.     

PITFALLS IN CROSS‐SECTION STUDIES WITH INTEGRATED REGRESSORS: A SURVEY AND NEW DEVELOPMENTS

In cross‐section studies, if the dependent variable is I(0) but the regressor is I(1), the true slope must be zero in the resulting “unbalanced regression.” A spuriously significant relationship may be found in large cross‐sections, however, if the integrated regressor is related to a stationary variable that enters the DGP but is omitted from the regression. The solution is to search for the related stationary variable, in some cases the first difference of the integrated regressor, in other cases, a categorical variable that can take on limited number of values which depend on the integrated variable. We present an extensive survey, new developments, and applications particularly in finance.     

Non-rating revenue and conflicts of interest

Rating agencies produce ratings used by investors, but obtain most of their revenue from issuers, leading to a conflict of interest. We employ a unique data set on the use of non-rating services, and the associated payments, in India, to test if this conflict affects ratings quality. Agencies rate issuers that pay them for non-rating services higher (than agencies not hired for such services). Such issuers also have higher default rates. Both effects are increasing in the amount paid. These results suggest that issuers which hire agencies for non-rating services receive higher ratings despite having higher default risk.     

Integrated system of occupational safety and health and fire protection of the fire rescue brigades members

The objective of the conducted research is the identification and determination of requirements of members of fire rescue brigades during operations in the conditions of high risk in order to minimize the possibilities for injury incidence during the intervention. The research is focused on examination, determination and identification of factors affecting the increasing number of occupational injuries of members of fire rescue brigades during interventions. Hypothetical framework of the research problem consists of general hypothesis and six special hypotheses. Results suggest that almost all respondents believe that their skills and abilities are applicable in the intervention phase, but less than a half believe that their skills are applicable in prevention phase. Two-thirds of respondents stated that in their organization they have support for further education and upgrading while a half of respondents stated that they need education concerning identification, assessment and management of risks that can lead to emergency situations.     

儒家传统文化与公司违规行为*——基于中国家族上市公司的分析

本文按照“文化-行为”的逻辑，探讨了作为非正式制度的重要组成部分之儒家传统文化对公司违规行为的影响。本文以2007—2014年沪深两市的中国家族企业上市公司为研究样本，考察了儒家传统文化对上市公司违规行为的影响以及其与正式制度（法律）的交互作用。研究发现，儒家传统文化影响力越强，上市公司违规行为发生的概率越低；并且在儒家传统文化与正式制度（法律）两者交互叠加作用时上市公司违规行为发生的概率更低。