The great trade collapse and Indian firms

The collapse in global trade during the 2008–09 crisis has been widely studied using the developed nation(s) data. I use firm‐level data from Indian manufacturers to show that: (a) Indian firms experience strong negative demand shocks concerning their exports to the USA and the EU, the effect being significantly higher in case of the USA. Results assert that 1% increase in the exposure towards the crisis‐affected zones (the USA and the EU combined) reduces an average Indian manufacturing firm's export earnings by 1.17%–1.36%; (b) trade in consumer non‐durables and durables are the two most affected sectors, impact being higher for the latter; (c) evidence in support of similar effects throughout the size distribution of firms, with the effect being highest for small or the most vulnerable firms; (d) drop in demand, as a result of the 2008–09 crisis, only affects the high‐exposure industries. My results are robust to IV analysis and a variety of checks.     

The chosen fortunate in the urbanization process in China? Evidence from a geographic regression discontinuity study

After decades of delayed urbanization, since 1998, China has implemented the “county‐to‐district” policy to promote urbanization and stimulate regional economic development. This policy was designed to expand the urban area of large cities by merging counties (rural areas) with nearby cities (urban areas). Intuitively, these regions are the “chosen fortunate” since they are the privileged beneficiaries of this policy experiment. However, at the time of writing (2018), recent studies have been inconsistent regarding this issue, and several studies have revealed that this policy has impeded regional growth. Therefore, the true effect of this policy must be carefully examined. Using grid‐level nighttime light data and a border‐based regression discontinuity design framework, we find that the average effect of the “county‐to‐district” policy on nighttime light growth is significant and positive, and this result also coincides with the increase of entry and decrease of exit of manufacturing enterprises, and the increase of the county‐level manufacturing employment. However, the policy effect on nighttime light turns to be negative in the long run, implying that short‐term economic growth may outweigh the long‐term economic growth potential. A further investigation of the underlying mechanism indicates that industrial enterprises in the experimental policy area do not perform better in terms of total factor productivity (TFP) and profit margin than their counterparts. Moreover, this policy aggravates the polarization between central and border areas.     

再开票中心——国际营运资金管理的有效途径

跨国公司依据总体战略目标的需要,设立再开票中心进行双边或多边冲销,可以达到方便债权债务结算、减轻公司整体税负、加速内部资金融通并降低资金转移费用,避免外汇风险的显著财务效应,使得再开票中心成为国际营运资金管理的有效途径。     

ON OPTIMAL INVESTMENT FOR A BEHAVIORAL INVESTOR IN MULTIPERIOD INCOMPLETE MARKET MODELS

We study the optimal investment problem for a behavioral investor in an incomplete discrete‐time multiperiod financial market model. For the first time in the literature, we provide easily verifiable and interpretable conditions for well‐posedness. Under two different sets of assumptions, we also establish the existence of optimal strategies.     

酪氨酸激酶抑制剂治疗非小细胞肺癌的临床应用

吉非替尼为一种选择性的EGFR一蛋白酪氨酸激酶抑制剂,能阻断酪氨酸蛋白激酶信号传导通路,从而促进肿瘤细胞凋亡。它是作为第一个用于肺癌治疗的分子靶向药物,在治疗非小细胞肺癌中拥有其自身的优越性在临床中取得了一定成效,但仍存在很多问题。本文针对吉非替尼靶向治疗非肺癌小细胞肺癌中的优点和所面临的问题进行阐述。     

人类副流感病毒F蛋白抗原性的信息学分析

依据报道的人类副流感病毒I型F蛋白氨基酸序列,通过SPOMA服务器、Signalp3.0服务器预测了F蛋白的二级结构和信号肽;通过TMHMM-2.0服务器预测了F蛋白的跨膜区;通过使用PROTSCALE服务器、SYFPEITHI服务器和Harvard的工具,综合分析得出F蛋白上第190-195和390-399区段可能为抗原肽段区域。该研究结果为副流感亚单位疫苗的研制奠定了基础。     

沈阳市再生水源热泵供暖技术的节能减排潜力

利用生命周期评价方法分析对比再生水源热泵和燃煤锅炉在原材料生产、机组生产、运输、热量生产及废弃物处理整生命周期过程的能源消耗及SO2、总悬浮颗粒物(TSP)排放。结果表明在生产1GJ热能的情况下,再生水源热泵比燃煤锅炉节能约1GJ,减排SO20.7kg,减排大气TSP 7.2kg。热量生产阶段是耗能及污染物排放的关键环节,超过99%的能源消耗和污染排放在这一环节产生。在供暖季节,如果沈阳市现有和规划污水处理厂的再生水应用再生水源热泵替代燃煤锅炉供暖,在每年的供暖期里可为沈阳市节能11×106GJ(折合标煤37.5×104t),减排SO275.9t,减排TSP 775.4t。     

土地整治项目对渭北台塬区土壤理化特性的影响

为探究土地整治项目对土壤理化特性的改良效果,本文以宝鸡市陇县河北镇兰家堡村荒草地整治项目为例,对工程实施前、实施后耕作层土壤结构和理化特性的变化进行了分析。结果表明,土地平整工程对耕作层土壤质量的改善具有显著促进作用。通过开展土地平整工程,土壤pH值显著降低,土壤耕作层土壤pH值较工程实施前降低了3.81%。整个土壤耕作层0~30cm土层深度范围内黏粒含量较整治前提高了36.34%,0~30cm土层深度范围内砂粒含量较整治前降低了5.87%。工程实施对土壤全氮、有效磷、速效钾以及有机质含量均产生了不同程度的影响,土壤全氮含量较工程实施前提高了51.16%,土壤有效磷和速效钾在工程实施后分别较之前提高了53.0%和22.97%,有机质含量较之前高出47.72%。     

-learning agents in a Cournot oligopoly model

Q-learning is a reinforcement learning model from the field of artificial intelligence. We study the use of Q-learning for modeling the learning behavior of firms in repeated Cournot oligopoly games. Based on computer simulations, we show that Q-learning firms generally learn to collude with each other, although full collusion usually does not emerge. We also present some analytical results. These results provide insight into the underlying mechanism that causes collusive behavior to emerge. Q-learning is one of the few learning models available that can explain the emergence of collusive behavior in settings in which there is no punishment mechanism and no possibility for explicit communication between firms.     

急性脑梗死患者早期血清C-反应蛋白测定及临床意义

为了探讨血清C-反应蛋白（CRP）测定在急性脑梗死早期的临床价值 ,采用透射比浊法测定158例急性脑梗死患者入院后48小时内血清标本和30例体检健康者的血清标本中CRP水平,以CRP＞8mg/L为阳性,按临床及CT扫描结果分组比较.结果发现急性脑梗死患者轻、中、重各组血清CRP水平均明显升高,均显著高于正常对照组.在轻、中、重各组中,CRP水平也存在明显不同,随临床神经功能缺损程度的加重,CRP水平升高;急性脑梗死患者发病早期血清CRP阳性率为53.8%,而正常对照组中无1例阳性;急性脑梗死患者发病早期血清CRP阳性者其病死率显著高于CRP阴性者.认为可通过临床上检测急性脑梗死患者血清CRP的变化来判断病情及评估预后.