Technological similarity,post-acquisition R&D reorganization,and innovation performance in horizontal acquisitions     

Massimo G. Colombo  Larissa Rabbiosi 《Research Policy》2014

This paper aims to disentangle the mechanisms through which technological similarity between acquiring and acquired firms influences innovation in horizontal acquisitions. We develop a theoretical model that links technological similarity to: (i) two key aspects of post-acquisition reorganization of acquired R&D operations – the rationalization of the R&D operations and the replacement of the R&D top manager, and (ii) two intermediate effects that are closely associated with the post-acquisition innovation performance of the combined firm – improvements in R&D productivity and disruptions in R&D personnel. We rely on PLS techniques to test our theoretical model using detailed information on 31 horizontal acquisitions in high- and medium-tech industries. Our results indicate that in horizontal acquisitions, technological similarity negatively affects post-acquisition innovation performance and that this negative effect is not mediated by the reorganization of the acquired R&D operations. However, replacing the acquired firm's R&D top manager leads to R&D productivity improvements that positively affect innovation performance.  相似文献   

The lag structure of the relationship between patenting and internal R&D revisited     

Ning Wang  John Hagedoorn 《Research Policy》2014

The principal purpose of this study is to revisit the classic research question regarding the lag structure of the patents–R&D relationship through an examination of the impact of internal R&D on firm patenting in the context of the global pharmaceutical industry during 1986–2000. Our empirical analysis, using both a multiplicative distributed lag model and a dynamic linear feedback model, differs from previous work that examines the patents–R&D relationship in three aspects. First, our estimation results exhibit direct evidence on lagged R&D effects, with the first lag (t − 1) of R&D being significant in all distributed lag specifications. Second, a U-shaped lag structure of the patents–R&D relationship is found in most estimations of the multiplicative distributed lag model, which suggests a potential long-run effect of internal R&D investments on firm patenting. Finally, the results from the dynamic linear feedback model coincide with those from the multiplicative distributed lag model, indicating not only lag effects from more recent R&D but also an overall long-run effect of internal R&D investments in the distant past on the knowledge production or innovation process of incumbent pharmaceutical firms.  相似文献   

Intangible assets and firm heterogeneity: Evidence from Italy     

Alessandro Arrighetti  Fabio Landini  Andrea Lasagni 《Research Policy》2014

The positive impact of intangible assets on several measures of economic performance is well documented in the literature. Less clear is what initially leads firms to invest in intangible assets. The latter is particularly important because, at least for the Italian manufacturing sector, firms exhibit strong heterogeneity in their investments in intangible assets. In line with the capability-based theory of the firm, we argue that the firm's propensity to invest in intangible assets can be explained by factors that are internal and specific to the firm. Making use of a rich dataset, we test and provide support for our hypotheses. In particular, we find that the propensity to invest in intangible assets increases with the firm's size, human capital, and historical intangible asset base. This points towards the existence of a cumulative process of intangible asset accumulation, which may account for most of the heterogeneity observed in the data. The paper adds to the previous literature in two ways: first, it highlights the existence of strong intra-industry heterogeneity in intangible asset investments, and second, it offers an explanation for such heterogeneity.  相似文献   

企业研发费用加计扣除政策实施效果的影响因素分析     

赵彤  范金  周应恒 《科技管理研究》2014,(18)

企业研发费用加计扣除(以下简称“加计扣除”)政策是迄今为止我国促进企业加大研发投入,提高自主创新能力支持力度最大的税收政策措施。本文在对江苏创新型企业进行问卷调查的基础上,建立Probit模型对加计扣除政策实施效果的影响因素进行了分析。研究结果表明：企业规模、企业性质、企业研发水平、企业财务.管理水平、企业知识产权保护策略、区域行政政策、政策宣传服务水平、政策申报成本、政府行政效率、政府支持自主创新的金融政策10个因素对加计扣除政策实施效果具有影响。其中,企业研发水平是影响加计扣除政策实施效果最显著的正向影响因素;企业财务管理水平、企业知识产权保护策略分别是影响加计扣除政策实施效果重要的正向和负向因素;企业规模、企业性质、区域行政政策和政府行政效率是影响加计扣除政策实施效果较重要的正向因素;金融政策对加计扣除政策的实施效果具有负面的影响,政策之间没有形成合力;政策宣传服务水平和申报成本分别对于加计扣除政策实施效果具有正面和负面影响。据此本文提出相应对策建议。  相似文献   

复杂零件装配流程优化的三维图像虚拟重现仿真     

李艳群 《科技通报》2014,(12)

当前复杂的零件装配过程中,装配流程的步骤多达上千次,合理的装配顺序是高效工作的保证。提出一种基于考虑需求虚拟负责零件装配流程重新仿真方法。分析了复杂零件直接的装配关系。通过装配体层、子装配体层、零件层、零件特征层、零件几何层建立零件直接的装配关系模型。通过三维图像虚拟技术完成模型的重现。测试结果表明,采用三维图像虚拟复杂零件装配流程系统,可以对较为复杂的零件拆卸过程进行重现,对交叉装配过程的仿真过程也可以较好的实现。  相似文献   

基于伪点剔除与四域样条插值的三维煤层建模     

肖静 《科技通报》2014,(12)

三维煤层精确建模受地下断层、岩层、地势起伏等因素的影响,建模精度不高。为提高三维煤层建模的精度,提出一种基于伪点剔除与四域样条插值的三维煤层精确建模算法,通过伪点剔除方法对建模点进行预处理,筛选出其中的孤立点,进行剔除,其余非孤立点用于基本模型建立和基于映射的模型重构,采用四域样条插值方法对非孤立点进行建模,在建模中,将建模域分为起始域、延伸域、稳定域、收敛域共四个域,在不同域中,对不同的建模点进行匹配加权插值处理,经过四域联合滤波,实现四域样条插值,对建模效果起到平滑滤波作用,从而大大提高三维建模精度。仿真实验表明,新算法对于外界断层、岩层、地势起伏等具有很好的鲁棒性,三维建模精度提高,并且计算量明显较少。  相似文献   

光斑对激光点位精度的影响的探讨     

闵志欢  黄茂江 《科技广场》2014,(11)

三维激光扫描中受激光光斑的影响较大,所以需要分析光斑对激光点位精度造成的影响。本文给出了光斑中点位的误差分布特点,将光斑对光斑的影响投影到不同坐标轴上,从而得到光斑引起的不同方向的中误差,根据不同方向的中误差便可确定基于光斑影响的点位中误差,从而实现光斑对激光点位误差影响的分析。  相似文献   

1999-2008年G20国家自然资本利用的空间格局变化   总被引：3，自引：0，他引：3  

方恺 《资源科学》2014,36(4):793-800

各国自然资本利用的时空分异评价是近期可持续发展领域的研究热点。本文采用改进的三维生态足迹模型,对1999-2008年20国集团(G20)自然资本利用的空间格局变化进行了分析。结果表明:G20国家的自然资本利用格局具有显著的空间分异性,呈现流量自然资本占用西高东低、存量自然资本消耗北高南低的格局。根据1999-2008年自然资本利用的变化趋势,可将G20国家分为4类:流量和存量自然资本利用增强型(FI-SI型,2国)、流量和存量自然资本利用减弱型(FD-SD型,2国)、流量自然资本利用增强而存量自然资本利用减弱型(FI-SD型,4国)、流量自然资本利用减弱而存量自然资本利用增强型(FD-SI型,11国)。总体上,流量自然资本占用减弱、存量自然资本消耗增强已成为各国自然资本利用的主要变化趋势,可持续性趋于劣化,代内和代际不公平程度加剧。  相似文献   

基于Unity3D的搬运机械手仿真     

罗捷 《大众科技》2014,(1):62-64

以某型搬运机械手为仿真原型。对其机械结构、运动模型进行了分析,创建其三维零件模型,在Unity3D中完成零件模型的组装,利用物理引擎实现碰撞与摩擦的仿真,使用脚本仿真电机与气动的驱动方式。在Unity3D引擎中实现了对搬运机械手这一较复杂机械的仿真。其仿真效果与实际设备有着较高的一致性。相比于传统解决方案,本搬运机械手的仿真方法在实现的方便性,仿真的交互性方面有了不同程度的改进与提高。  相似文献   

发达国家制造外包本土化回流的动因分析     

张月月  胡峰 《未来与发展》2014,(6):50-54

金融危机对发达国家经济造成重创,发达国家亟需构筑新战略推动经济复苏,借助制造外包的回流重振工业是发达国家的新选择。发达国家制造外包回流本土是多个因素共同驱动的结果。中国要想摆脱发达国家制造外包本土化回流带来的冲击,必须从培育自身竞争优势和强化对制造外包吸引力两个方面进行制造业的转型升级,从而摆脱在全球经济体系中的被动局势。  相似文献