出口、创新影响民营企业自生能力的实证分析——基于融资约束视角

本文基于2005~2007年中国工业企业数据,构建循环结构联立方程模型,探究融资约束视角下出口和创新对民营企业自生能力的影响;结果表明,民营企业出口和创新是提高其自生能力的直接有效途径,出口和创新与企业自生能力间存在显著的自我加强效应;融资约束缓解虽然不能直接作用于企业自生能力提升,但通过出口和创新路径间接地促进了企业自生能力的提升,融资约束缓解与出口和创新间也存在自我加强效应。由于企业自生能力提升对企业创新的影响系数显著且四倍于对企业出口的影响,因此,提升民营企业自生能力具有重大现实意义。为此,需要在制度上保证不同所有制企业依法平等地使用生产要素。     

The empirical link between export dispersion and export performance: A contingency-based approach

Practitioners and scholars point out that firms are increasingly dispersing their capabilities across organizational functions. However, it is not clear whether all forms of dispersion, of any function, result in the same consequences. This study initiates investigation into the link between the cross-functional dispersion of influence on export marketing decisions (export dispersion) and export performance. Drawing on data from a sample of 225 UK exporters, the findings support the argument that active participation of non-export functions in export-marketing decisions affects export success. However, those performance consequences are dependent on internal and external contingencies. Export dispersion is beneficial for export performance when the export customer environment is more turbulent and, simultaneously, the export technological environment is more stable and the firm has lower levels of export information sharing. In all other scenarios examined in this study, greater levels of concentration of export decision-making (i.e. lower levels of export dispersion) appear to be more beneficial for export performance. Our findings imply that the management of the firm’s level of export dispersion is a complex task, whereby the degree of export dispersion pursued needs to match external environmental and internal firm factors.     

Trading frequency and event study test specification

We examine the effects of thin trading on the specification of event study tests. Simulations of upper and lower tail tests are reported with and without variance increases on the event date across levels of trading volume. The traditional standardized test is misspecified for thinly traded samples. If return variance is unlikely to increase, then Corrado's rank test provides the best specification and power. With variance increases, the rank test is misspecified. The Boehmer et al. standardized cross-sectional test (Event-study methodology under conditions of event-induced variance, Journal of Financial Economics 30, pp. 253–272) is properly specified, but not powerful, for upper-tailed tests. Lower-tailed alternative hypotheses can best be evaluated using the generalized sign test.     

人民币实际汇率波动对中欧进出口贸易影响的实证研究

本文通过建立GARCH模型量度了人民币对欧元实际汇率的波动性,并运用协整检验模型、误差修正模型、脉冲响应函数和方差分解技术就人民币实际汇率变动对中国与欧元区之间进出口贸易的影响进行分析。分析结果表明,中国对欧元区出口在长期内随汇率波动而增加,而进口却随汇率波动而减少;在短期内汇率波动推动中国进口,抑制中国出口。人民币升值在长期内给双边出口均造成伤害,但对中国出口伤害更大;在短期内人民币贬值将对中国进出口均有推动作用。本文分析还表明,在长期内,中国对欧元区出口收入效应远远大于欧元区对华出口收入效应;在短期内,中国实际收入变动对欧元区出口表现负向冲击,而欧元区实际收入变动对中国出口表现为正向冲击。中国汇率制度改革对中国出口欧元区产生推动作用,对欧元区出口产生抑制作用,且前者大于后者。实际汇率水平及其波动性变化对欧元区对华出口变动的解释力高于中国实际收入水平变化的解释力,而对于中国对欧元区出口的变动,欧元区实际收入水平变动的解释力高于实际汇率水平及其波动性变化的解释力。     

分拣导入物料的投影尺寸及近似体积测量计算方法

分析了目前自动化物流分拣输送系统在物料导入输送环节的工艺特点和设备控制现状,并结合应用光电检测、工业可编程控制等技术,针对水平交叉带分拣输送机应用场景,对其中物料导入控制环节所面临的物料外形尺寸测量和计算问题,提出了基于物料轮廓最大值检测、尺寸特征捕捉、长宽比关系判断等要素来对物料投影尺寸进行测量的计算方法,具有数据采集实时、程序编写简单、运算量少等特点;同时基于对导入输送的物料进行横向、纵向的截面段断层扫描测量并累加计算,以较低的器件成本及较少的控制器程序运算量,实现对物料体积的近似测量计算,是一种较为经济和可取的控制计算方法。     

服务业对外直接投资的出口效应——基于我国微观企业的研究

文章基于我国服务业上市企业数据,采用多维固定效应模型,探讨和分析了我国服务业OFDI对服务贸易出口的影响,经研究发现：第一,服务业OFDI通过吸收东道国先进技术经验提升企业生产率水平和避开东道国服务贸易壁垒降低贸易成本,促进企业服务贸易出口增长;第二,我国服务业OFDI显著提升了企业服务贸易出口的二元边际,具体而言,整体上服务业OFDI会促进服务贸易出口增长4.82%,同时会提升企业的出口概率;第三,我国服务业OFDI"出口效应"存在明显的区域和行业的异质性,具体表现为：生产性服务业和消费性服务业OFDI存在显著的"出口效应",其OFDI带动服务贸易出口的增长分别为5.68%和3.52%,而公共服务业则不存在显著的"出口效应";东部地区和中部地区服务业OFDI存在显著的"出口效应",其OFDI带动区域服务贸易出口的增长分别为4.97%和3.56%,而西部地区则不存在显著的"出口效应"。上述研究结论对化解我国服务贸易出口增长困境和完善服务业对外直接投资政策机制具有一定的启示意义。     

THE GENERAL STRUCTURE OF OPTIMAL INVESTMENT AND CONSUMPTION WITH SMALL TRANSACTION COSTS

We investigate the general structure of optimal investment and consumption with small proportional transaction costs. For a safe asset and a risky asset with general continuous dynamics, traded with random and time‐varying but small transaction costs, we derive simple formal asymptotics for the optimal policy and welfare. These reveal the roles of the investors' preferences as well as the market and cost dynamics, and also lead to a fully dynamic model for the implied trading volume. In frictionless models that can be solved in closed form, explicit formulas for the leading‐order corrections due to small transaction costs are obtained.     

污水处理厂的脱氮除磷改造

结合城镇污水处理厂脱氮除磷改造工程实例，对老氧化沟进行功能区划分、设备改造：增加好氧区溶解氧浓度，降低缺（厌）区溶解氧浓度；同时适当增容，延长氧化沟水力停留时间和污泥泥龄。运行结果表明，系统出水主要指标稳定达到GB18918—2002一级A标准。     

中国省级税制结构变动的主导动因——基于面板门限模型的检验

国际经济一体化和国内政策调整主导了税制结构变化.政策制定者若顺应税制结构一般演变规律相应进行调整将会实现社会和谐发展,调整应同时兼顾国际化带来的冲击.从长期来看,经济发展对税制结构的作用程度减弱.若不存在冲击波动,税制结构将趋于稳定;税收来源的多元化和税收收入的指数化有利于降低税制结构波动程度.因此,开征财产税,实现社会保障的费改税,建构多元化且指数化的税收收入体系是我国中长期税制改革的方向.     

Increasing the Effectiveness of Export Assistance Programs

Abstract

This study focuses on the export assistance needs of small and medium-sized firms in the California EnviroTech industry. The objectives of this study are to: (1) provide public sector assistance providers research-based recommendations to increase the effectiveness of their export assistance programs to the EnviroTech industry; and (2) promote the advantages of a single industry study as the basis for providing public sector export assistance.