比较优势理论在中国现阶段的适用性实证

比较优势理论是国际贸易理论的基石,不但在很大程度上解释了国际贸易发生的原因和指出了一个国家或地区发展国际贸易的方向,也是一个国家或地区制定经济发展战略的重要基础经济理论之一。有数据实证分析说明,中国当前的国际贸易产品结构中显示出了与中国要素禀赋结构相一致的比较优势,从而验证了中国经济的增长受益于遵循比较优势的发展,因此,中国未来的经济发展战略仍然应该建立在遵循比较优势的发展理论基础之上。     

Signature Profiling and Classification of Illicit Heroin by GC-MS Analysis of Acidic and Neutral Manufacturing Impurities

Abstract:  The illicit manufacture of heroin results in the formation of trace level acidic and neutral impurities. These impurities are detectable in illicit heroin and provide valuable information about the manufacturing process used. The isolation, derivatization, and semiquantitative analysis of neutral and acidic heroin manufacturing impurities by programmed temperature vaporizing injector-gas chromatography-mass spectrometry (PTV-GC-MS) is described. Trace acidic and neutral heroin impurities were isolated from basic fractions using liquid–liquid extraction. Extracted impurities were treated with N -Methyl- N -trimethylsilyltrifluoroacetamide followed by PTV-GC-MS analyses. Semiquantitative data were obtained using full scan mass spectrometry utilizing unique ions or ion combinations for 36 trace impurities found in crude and/or highly refined heroin samples. Minimum detection limits for acidic and neutral impurities were estimated to be at the 10⁻⁷ level relative to total morphine. Over 500 authentic heroin samples from South America, Mexico, Southwest Asia, and Southeast Asia were analyzed. Classification of illicit heroin based on the presence or absence and relative amounts of acidic and neutral impurities is presented.     

Thiodicarb and methomyl tissue distribution in a fatal multiple compounds poisoning

Abstract:  Thiodicarb is a nonsystemic carbamate insecticide whose acetylcholinesterase activity is related to its main methomyl degradation product. A 40-year-old woman was found dead in her car. Empty packages of medicines and an open bottle of Larvin^® containing thiodicarb were found near her body. No signs of violence nor traumatic injuries were noticed upon autopsy, and police investigations strongly suggested a suicide. Systematic toxicological analysis performed on postmortem specimens revealed the presence of various sedatives, hypnotics, and antipsychotic drugs in blood, urine, and gastric content. Some of the compounds identified were determined at blood concentrations well above the known therapeutic concentrations: zolpidem (2.87 mg/L), bromazepam (2.39 mg/L), nordazepam (4.21 mg/L), and levopremazine (0.64 mg/L). Specific analysis of thiodicarb and of its methomyl metabolite was then performed on all fluids and tissues collected during autopsy by liquid chromatography ion trap tandem mass spectrometry (LC-MS-MS). The anticholinesterase capacity of blood, urine, and gastric content collected at autopsy was 83%, 82%, and 32%, respectively (normal value: 0%). The presence of thiodicarb in the bottle found near the body corroborates the hypothesis of an intake of that compound. Although thiodicarb was only detected in gastric content (24.3 mg/L), its methomyl metabolite was quantified in most postmortem tissues and fluids: gastric content (19.9 mg/L), peripheral blood (0.7 mg/L), urine (8.5 mg/L), bile (2.7 mg/L), liver (0.7 mg/kg), kidney (1.7 mg/kg), lung (1.5 mg/kg), brain (9.3 mg/kg), and heart (3.6 mg/kg).     

Global Renewable Electricity Policy: A Comparative Policy Analysis of Countries by Income Status

Although the drivers of renewable electricity (RE) are well-established among Western high-income countries, little is known about the factors that encourage RE development elsewhere. This paper analyzes an unprecedented, original dataset of 149 countries from 1990 to 2010 to compare the policy instruments and other factors that influence RE adoption across low-, middle-, and high-income countries. We find the factors driving RE development vary both across income group and between hydroelectric and non-hydro generation. Most notably for environmental concerns, non-hydroelectric RE generation is driven by feed-in-tariffs and renewable portfolio standards in high-income countries, feed-in tariffs alone in middle-income countries, and by subsidies in low-income countries. Non-policy drivers of RE also vary by country income level.     

Debt crisis of the less developed countries and the transfer debate once again

In the perspective of substantial amount of net transfers from the debtor less developed countries (LDCs) to the creditor developed countries (DCs) in the recent debt crisis years, there is a renewed debate (that started in the context of German reparation payments after the First World War) on the question of transfer burden of debt. The present study assembles some evidence to show that the LDCs in general expanded their export‐volumes and faced losses in their export unit values in the process of their debt repayments. Many LDCs faced this transfer burden of debt irrespective of whether their export drive was in the field of primary products or manufactures. Thus the Keynesian analysis for German transfer problems seems to be relevant in the context of the present experience of the LDCs. For some debtor countries, the ‘insoluble’ transfer problem mentioned by Keynes exists as they are facing ‘Fisher's paradox’: The more the debtors pay, the more they owe.     

“泛安全化陷阱”及其跨越

安全概念及其适用范围是国际关系学界长期以来争论的焦点之一。冷战结束后,传统安全的边界被打破,非传统安全领域议题越来越多地占据国家安全和国际关系议题的中心地位。国家行为体追求绝对安全状态和无节制扩充安全议题,可能造成资源的错配和浪费,导致国内政治的保守化和国际交往的封闭趋向,最终反而不利于实现安全目标,从而掉入“泛安全化陷阱”。当前,国际上少数国家表面上以“国家安全”为由干扰国际合作,实则推行单边主义和保护主义政策,对全球多边主义秩序规则、国际合作、大国关系造成严重冲击,其消极影响不可低估。党的十八大以来,中国的安全体系和能力建设取得了重要成就,形成了总体国家安全观的理论体系。作为新兴大国,中国同时面临复杂的安全形势和较大的发展压力。中国应以总体国家安全观为指导,理性平衡好安全与开放、发展之间的关系,审慎塑造安全议程,防止落入“泛安全化陷阱”。同时,中国在国际上应坚决反对滥用安全概念的行为,在新兴全球性议题上高举合作旗帜,推动经济全球化和国际关系民主化的持续发展,积极推动国际安全治理机制改革和创新,为构建人类命运共同体凝聚广泛共识和作出积极贡献。     

知识产权保护及其陷阱防范——以中部地区为立足点分析

随着承接产业转移的推进,中部各省纷纷把吸收再创新作为提高本地区综合实力的重要选择。并出台相应的法律政策来保护产权和鼓励创新。但知识产权保护需要制定科学的策略,在鼓励创新和全面发展的同时,也要积极防范相应的“知识产权陷阱”。     

刑事诉讼实践中的若干问题研究

刑事诉讼实践中存在着一些问题,如法院将作出对被告人有利的无罪判决时,检察院以“事实、证据有变化为由”,申请撤诉,从而严重侵害了被告人的人权；无罪案件中的非法证据问题；法院是否可以变更起诉罪名和事实宣告被告人无罪；法院在宣告被告人无罪前,检察院申请撤回起诉等等。研究这些问题,对促进和完善刑事诉讼程序具有一定的实践和理论意义。     

试论警察的审讯圈套

警察审讯犯罪嫌疑人的目的是查明案件的事实真相和获取诉讼证据。犯罪嫌疑人出于防御的本能和趋利避害的心理,总是想否认犯罪,逃避惩罚,因此,审讯不可避免地存在着激烈的对抗性,警察如果想用对待普通守法公民的态度和方法从有罪者中获得证明其有罪的信息,显然是十分困难的,因此,他必须使用一些技巧和策略。从我国的刑事审讯实践看,欺骗性方法也是被实际允许并不时使用的。这种方法在刑事侦查学上常被称为“审讯策略”,其实质是“利用对方的劣势和弱点进行的心战智斗”。     

解读操纵和粉饰现金流量表的陷阱

比起资产负债表、利润表,现金流量表更能全面地反映企业产生现金流量的能力并揭示现金流向所描述的本质。但是,现金流量表也是可以粉饰、操控的,现金流量表的强盗式造假、欺骗性操纵和技巧性包装等是操纵和粉饰的主要表现形式。