非互惠的零关税待遇是否促进了受惠国的出口多样化——基于中美对非洲贸易政策的比较研究

非互惠的优惠贸易待遇是世界贸易组织和国际社会支持发展中国家尤其是最不发达国家发展的重要工具。为了评估该政策的效果,本文以中美对非洲实施的零关税待遇为例,采用2001—2017年HS8位贸易数据从整体、行业和区域层面评估了两种政策对受惠国出口多样化产生的影响。结果显示,美国零关税待遇分为AGOA-GSP和AGOA-服装两个条款,中国零关税待遇(FOCAC)在遵循WTO规则、受惠商品范围、受惠国家标准、原产地标准及政策有效期方面均优于AGOA-GSP,但在原产地标准灵活度和政策优惠力度方面低于AGOA-服装。这些特征导致三类政策对受惠国出口多样化的影响产生显著的差异。整体上,FOCAC和AGOA-服装对受惠国出口多样化均产生了显著的积极影响,而AGOA-GSP的影响不显著;行业层面,FOCAC对受惠国制造业、矿业和农业的出口多样化均产生了显著的促进作用,而AGOA的两个条款对受惠国三个细分行业出口多样化的影响均不显著;区域层面,三类政策对受惠国出口多样化的影响仅在部分区域发挥效果。     

政府背景风险投资对创新的甄选与培育效果——不同区域环境视角的检验

以创业板企业数据为样本，使用Logit模型及工具变量法，研究不同区域环境下政府背景风险投资对企业创新的事前甄选与事后培育作用，并对其机制进行探讨。结果表明：①经济区域对政府背景风险投资行为影响有限，与非核心发达地区相比，金融发达地区的政府背景风险投资对企业技术创新没有表现出差异性甄选行为，但却有更好的事后培育作用，而且这种培育作用会随着地区投资环境优化而增强；②行政区域对政府背景风险投资行为影响显著，与异省投资相比，本省政府背景风险投资对技术创新的事前甄选具有显著优势，但对被投企业后续创新投入产生了一定的负面作用，这种作用会因政府背景风险投资占有董事会席位而加大。     

水处理生物学的多媒体教学

进行“水处理生物学”教学时,恰当地运用多媒体技术、合理地设计课件内容,才能制作出高质量的课件;运用多媒体教学,精心组织安排教学过程,才能取得良好的教学效果。     

Treatment patterns,complications, and direct medical costs associated with ankylosing spondylitis in Chinese urban patients: a retrospective claims dataset analysis

Aim: To describe treatment pattern, complications, and direct medical costs associated with ankylosing spondylitis (AS) in Chinese urban patients.

Methods: The 2013 China Health Insurance Research Association (CHIRA) urban insurance claims database was used to identify patients with AS. The identified patients were stratified by AS treatments for the comparisons of well established AS-related complications and direct medical costs. Conventional regression analyses adjusted the collected patient baseline characteristics to confirm the impact of treatments on complications and direct medical costs.

Results: Of the identified 1299 patients with AS, 18.0% received non-steroidal anti-inflammatory drugs (NSAID), 11.2% received immunosuppressant, 48.2% received NSAID plus immunosuppressant, 4.6% received biologic agents, and 17.9% received medications without indication for AS. Biologic group was associated with the lowest proportion of AS-related complications (8.3%) that was confirmed by multiple logistic regression analysis (odds ratio = 0.200, p?=?.017). The biologic group was also associated with highest direct medical costs (median: RMB?=?14,539) that were confirmed by the multiple generalized linear model (coefficient = 1.644, p?Conclusions: Biologics were not commonly used for AS in Chinese patients likely due to their high cost. Future studies are needed to confirm the potential long-term clinical benefits associated biologic treatment for AS.     

Impact of contracts in high yielding varieties seed production on profits and yield: The case of Nepal

Nepal’s population continues to grow, but the agricultural sector’s performance remains almost stagnant. This has led to a decline in the per capita availability of food. Increasing agricultural productivity is the key to agricultural growth, and one strategy for increasing agricultural productivity is to use improved seeds. This study investigates the impact of contract farming (CF) in high yielding varieties (HYV) of paddy seed production on costs, yield, and profits of smallholder farms in Nepal. Using farm-level data and a non-parametric propensity score matching estimator, the study finds a significant positive impact of contract HYV seed farming on revenues, profits, and yield, and a significant negative impact on total costs of production. Additionally, very small farms (⩽0.43 ha) with CF in HYV paddy seeds tend to gain the most when it comes to yield per hectare. Our estimates reveal that the average smallholder household in Nepal engaged in CF with input conditions receives higher profits. However, farmers engaged in CF with output conditions tend to have higher yields but smaller profits. Finally, farmers engaged in CF in HYV paddy seeds with both input and output conditions have the highest yield gains and significantly higher profits.     

“逆全球化”探源:基于双边投资协定深度决定因素的研究

近年来全球化进程受阻,“逆全球化”根源有待进一步探讨。本文首次利用贸发会议“IIA绘图”数据,构建涵盖101项关键条款的双边投资协定(BITs)深度评价体系,测算了全球2539份BITs深度数据。通过理论和实证研究发现,东道国区位优势和母国所有权优势是决定BITs深度的重要因素。具体来看,东道国劳动力和自然资源禀赋的区位优势对BITs深度具有显著抑制作用,母国资本、技术和制度质量的所有权优势对BITs深度具有显著促进作用,同时母国资本和技术水平对BITs深度的影响存在异质性。进一步研究表明,2008年金融危机后,东道国劳动力资源对BITs深度的抑制作用增强,母国资本和技术水平的促进作用减弱,导致世界经济呈现“逆全球化”趋势,提高母国制度质量是实现经济全球化发展的有效途径。     

区域贸易优惠与最惠国待遇关系的冲突与法律协调——兼论我国之应对措施

区域贸易合作与多边贸易体制虽具有互补性,但彼此不能相互替代;区域贸易优惠与多边最惠国待遇实质上存在冲突,但它作为一项特殊例外存续于世贸组织体制之内。世贸组织规则确立了区域贸易优惠的合法性,从而为区域贸易提供了前所未有的发展机遇。分析区域贸易合作与多边贸易体制的关系、区域贸易优惠与世贸组织最惠国待遇的冲突,以及世贸组织规则对两者间关系的协调,有助于了解区域一体化发展进程,及时采取积极的应对措施。     

骨科卧床患者便秘的原因分析及预防与治疗对策

目的总结归纳骨科卧床患者便秘的原因，探索预防和治疗的措施。方法收集我院2000～2012年骨科下肢骨折、脊椎骨折、骨盆骨折患者100例综合分析。结果总结骨科卧床患者发生便秘的多种原因并给予相应的预防措施和解决办法，临床效果满意。结论采取预防措施能减少和纠正便秘的发生。     

Development and Psychometric validation of the Diabetes Therapy-Related QOL (DTR-QOL) Questionnaire

Abstract

Objective:

We developed and evaluated the psychometric properties of the Diabetes Therapy-Related QOL (DTR-QOL) as a disease-specific, self-administered questionnaire to assess the influence of diabetes treatment on patient QOL, regardless of treatment method.

Methods:

This new questionnaire was developed and validated in a standardized manner: Item development, pilot-testing and psychometric validation. A survey was conducted using the provisional version of the questionnaire, and reliability and validity were evaluated with psychometric testing.

Results:

The provisional version of the questionnaire was generated with 29 items through literature review and pilot testing. For psychometric assessment, analyses were performed on the responses of 284 adult Japanese patients with diabetes. Factor analysis by the principal factor method with promax rotation revealed 4 factors; “burden on social activities and daily activities” (13 items), “anxiety and dissatisfaction with treatment” (8 items), “hypoglycemia” (4 items), and “satisfaction with treatment” (4 items). For reliability, the intraclass correlation was 0.92, and Cronbach’s alpha coefficient was 0.94, indicating adequate test-retest reliability and internal consistency. For known-group validity, there were significant differences in scores for following variables: age, diabetes type, HbA1c, treatment method, glycemic control, hypoglycemia, nocturnal hypoglycemia, concern about weight gain, health status (patient assessment), and degree of communication with physician.

Conclusions:

The DTR-QOL, with good reliability and validity, can assess the influence of diabetes treatment on patient QOL. The DTR-QOL can be used regardless of treatment method that patients receive, and this characteristic enables to detect a difference on patients QOL between treatment methods before and after a switch of treatment. Limitations of this study include representativeness of the patient sample. The relatively small number of patients with type 1 diabetes should be noted. Also, responsiveness of the DTR-QOL has not yet been examined.