Distribution-free tests for comparing several treatments with a control

Abstract  In this paper we propose distribution-free treatments versus control tests for the one- and two-way classifications. The null distribution properties are shown to be equivalent to those of well-known statistics for which critical values have been extensively tabled. Asymptotic relative efficiencies with respect to corresponding normal theory competitors are derived and optimal designs for the allocation of experimental units to the treatments and control are obtained.     

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。     

论美国关税法337条款在GATT1994下的合法性——基于国际判例的思考

对337条款在GATT1994下合法性的正确评判,将会影响对337条款的态度及应对策略的制定.20世纪80年代,加拿大和欧共体曾经分别在关贸总协定体系内挑战过337条款的合法性.第一个案件专家组报告肯定了该案中337条款的合法性,第二个案件专家组报告对337条款的合法性总体上予以肯定,但也指出了337条款四个具体违法之...     

浅议接受非货币性资产捐赠时会计处理与税收实务的同一性

文章探讨了在执行新会计准则的情况下,应当如何认识接受非货币性捐赠资产时会计处理与税务处理同一性。以减少会计与税法不必要的差异问题。     

论美国关税法337条款在GATT1994下的合法性——基于国际判例的思考

对337条款在GATT1994下合法性的正确评判,将会影响对337条款的态度及应对策略的制定。20世纪80年代,加拿大和欧共体曾经分别在关贸总协定体系内挑战过337条款的合法性。第一个案件专家组报告肯定了该案中337条款的合法性,第二个案件专家组报告对337条款的合法性总体上予以肯定,但也指出了337条款四个具体违法之处。1994年,美国制定了《乌拉圭回合协议法》,有针对性地对专家组报告指出的四点进行了修改。修改后,337条款已经符合GATT1994的要求。一般性地起诉337条款违反GATT1994非常困难,可以在个案中结合具体案情向WTO申诉。     

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.     

我国股票期权会计处理探讨

随着企业不断推行股票期权计划,股票期权的会计处理成为实践和理论界都极为关注的课题。本文在界定股票期权及其属性的基础上,探讨了股票期权的计量和处理方法。最后本文给出了改进我国股票期权会计处理的建议。     

Large deviation asymptotics for statistical treatment rules

This note applies large deviation-based optimality theory to evaluate treatment rules for treatment assignment problems. We find nearly optimal treatment rules whose asymptotic maximum large deviation risks can be arbitrary close to the corresponding minimax bounds.     

A comparative institutional analysis of agreements on product standards

The WTO and the EU have chosen two different agreements on product standards. While the WTO's approach is primarily based on a “National Treatment” (NT) principle, the EU's approach crucially relies on a principle of “Mutual Recognition” (MR). This paper offers a first look at the comparative performance of these two principles. We show that standards are imposed for levels of externalities that are too low under NT and too high under MR. This suggests that NT should be preferred to MR when the amount of trade in goods characterized by high levels of externalities is large.