Knowledge Spillovers in Europe: A Patent Citations Analysis

This paper addresses the pattern of knowledge flows as indicated by patent citations between European regions. Our findings support the hypothesis that there are important barriers to knowledge flows in Europe. Patent citations occur more often between regions which belong to the same country and which are in geographical proximity. Furthermore, patent citations are industry specific and occur most often between regions that are specialised in industrial sectors with specific technological linkages between them. Patent citations are also more frequent when the citing region belongs to the same linguistic group as the cited region.
JEL classification : O 30; O 33; R 19     

R&D, Human Capital and International Technology Spillovers: A Cross-country Analysis

This paper is based on recent developments in the theory of innovation-driven growth that emphasize both the importance of R&D efforts — domestic as well as foreign — for explaining national productivity, and the complementarity between R&D and human capital investments. Estimates of specifications, in growth terms and in level terms, on a cross-section of OECD countries from the early 1960s to the early 1990s lend strong support to this thesis. The data show a significant influence of both domestic and foreign R&D. Moreover, there is clearly a net positive impact of human capital. The level and growth rate of human capital are shown to affect productivity growth and there is evidence of interaction with the catch-up process.
JEL classification: O 33; O 47     

International R&D Spillovers,Absorptive Capacity and Relative Backwardness: A Panel Smooth Transition Regression Model

We investigate how a country's absorptive capacity and relative backwardness affect the impact of international R&D spillovers on domestic Total Factor Productivity (TFP). To account for nonlinearities, we adopt a Panel Smooth Transition Regression approach, where a country's TFP elasticity to the foreign R&D stock is allowed to change smoothly across various identified extreme values, and the change is related to observable transition variables: human capital (capturing the country's absorptive capacity) and relative backwardness. The results suggest that absorptive capacity is positively associated with international R&D spillovers. In contrast with previous results, relative backwardness is instead found to have a negative and significant impact on international knowledge spillovers.     

Technological and geographical proximity effects on knowledge spillovers: evidence from the US patent citations

The purpose of this paper is to investigate the pattern of knowledge flows as indicated by the patent citations in three areas: USA, Japan and Europe. In each economic area, we use information from United States Patent and Trademarks Office data to assess empirically the impact of the technological and geographical proximities for 530 international firms. In particular, the contribution to the existing literature is twofold: first, we use an international sample in such a way that we may compare the empirical results among different economic markets; second, we extend the analysis of the determinants of knowledge spillovers, taking into account the time dimension of the effects of the proximities. In order to compute the technological proximity, we follow the methodology developed by A.B. Jaffe (1986 Jaffe, A. B. 1986. Technological opportunity and spillovers of R&D: Evidence from firms’ patents, profits and market value. American Economic Review, 76(5): 984–1001. [Web of Science ®] , [Google Scholar]. Technological opportunity and spillovers of R&D: Evidence from firms’ patents, profits and market value. American Economic Review 76, no. 5: 984–1001), where a technological vector is based on the distribution of patents of each firm across technology classes. As far as the geographic proximity is concerned, we use the latitude and the longitude coordinates of the city in which each firm is situated to obtain the distance, in miles, between the firms. The empirical results, in line with results from previous studies, indicate that there is a statistically significant relationship between the knowledge flows, proxied by the patent citations, and the proximities, but the effects are rather differentiated according to the proximity type.     

产业集群中知识溢出与区域竞争力提升研究

在知识经济时代,产业集群内知识溢出成为区域经济增长的主要内生变量,发挥着重要的作用,区域的竞争力也日益表现为对知识占有和利用之间的较量,研发创新、知识吸收与创新成为经济发展的内在动力源泉。本文分析了集群内知识溢出主要通过集群内企业间人员流动、集群内企业间观察模仿、集群内企业非正式交流及集群内企业衍生等途径来实现。探讨了集群内知识溢出和技术创新与区域竞争力的相互作用关系。提出了集群内知识溢出有利于集群企业的技术创新能力提升集群的知识积累水平,激活创新活力,增强区域的整体创新功能、有利于集群内企业降低创新成本与风险提升区域创新效率、有利于集群企业的人力资源的流动提升区域竞争力,从而形成集群区域独特的竞争优势。     

外商直接投资的知识溢出与中国区域经济增长

本文构建了包括国内知识资本、外商在华直接投资的知识溢出和地区技术进步的分析框架,通过中国29个省(直辖市、自治区)1992—2006年的面板数据检验了中国区域R&D投入、外商在华直接投资的知识溢出对地区技术进步的影响。研究表明:地区自身科技投入是推动地区技术进步的最主要因素;受中国目前引资结构和质量的影响,外商在华直接投资的知识溢出效应特别是通过FDI企业在当地从事生产活动带来的知识溢出效应并不明显;FDI渠道传递的外国R&D资本对技术进步的促进作用与当地的经济、科技发展水平有着密切关系。在上述结论的基础上,论文对中国FDI引资战略和区域经济发展提出了相应的政策建议。     

Cultural Enthusiasm,Resistance and the Societal Embedding of New Technologies: Psychotropic Drugs in the 20th Century

The societal embedding of new (medical) technologies involves not only market success, but also regulation and public acceptance. Cultural enthusiasm about their benefits and social concerns about their risks and dangers are in this respect important. Conceptualizing interactions between product championing, cultural enthusiasm and resistance, the article analyses three patterns of societal embedding: (1) hype-cycle, (2) contested embedding, and (3) controversy and stalemate. A fourth pattern of waves of enthusiasm and concern is proposed for technologies with unexpected side effects. This pattern is explored and elaborated with a longitudinal case study of the introduction of a particular form of medical technology: psychotropic drugs such as Veronal and Valium in the period 1900–2000.     

Knowledge spillovers in biotechnology: sources and incentives

This paper sheds light on the questions, Why does knowledge spill over? and How does knowledge spill over? The answer to these questions we suggest lies in the incentives confronting scientists to appropriate the expected value of their knowledge considered in the context of their path-dependent career trajectories. In particular, we focus on the ability of scientists to appropriate the value of knowledge embedded in their human capital along with the incentive structure influencing if and how scientists choose to commercialize their knowledge. We conclude that the spillover of knowledge from the source creating it, such as a university, research institute, or industrial corporation, to a new-firm startup facilitates the appropriation of knowledge for the individual scientist(s) but not necessarily for the organization creating that new knowledge in the first place.     

Exploring the Existence of Local and Global Knowledge Spillovers:Evidence from Plant‐Level Data*

We investigate the existence of local (within‐country) and global (between‐country) knowledge spillovers within a single analytical framework. Our study is based on a detailed database of domestically owned and foreign‐affiliated manufacturing plants located in Ireland. The results of our econometric analysis show that domestically owned plants benefit from the research and development (R&D) activities of other domestically owned plants, as well as from R&D activities conducted in the country of origin of foreign‐owned plants through their presence in Ireland. A fundamental difference between such locally generated and locally transmitted global spillovers appears to be that the latter are much less constrained by distance decay effects.     

Outward FDI,Total Factor Productivity and Domestic Output: Evidence from Germany

This paper examines the impact of outward FDI on domestic output and total factor productivity by applying cointegration techniques to macroeconomic time series data for Germany. We find a positive relationship between outward FDI and domestic output as well as between outward FDI and total factor productivity. Furthermore, our results indicate that there is bidirectional causality between outward FDI and domestic output, and outward FDI and total factor productivity, suggesting that increased output and productivity are both a consequence and a cause of increased outward FDI. Overall, the results of this paper can be interpreted as evidence of productivity-enhancing, and thus growth-enhancing, effects of outward FDI, which is inconsistent with the simplistic idea that outward investment represents a diversion of domestic economic activity.     

Real wages and labor-saving technical change: evidence from a panel of manufacturing industries in mature and labor-surplus economies

Recent theories have provided a persuasive account of a key stylized fact of mature economies: the common long-run trends of average real wages and labor productivity, and the ensuing stationarity of functional distribution. Central to these theories is the notion of directed technical change, which claims that a rise in labor costs sparks the adoption of labor-saving innovations. This paper empirically examines a core prediction of these theories, namely that shocks to functional distribution elicit compensatory adjustments in real product wages and labor productivity. Using two disaggregated data-sets of manufacturing industries (EU-Klems and Unido), I find evidence of cointegration and two-way, long-run Granger causality between these two variables. These findings suggest that directed technical change is indeed key for producing stationarity in functional distribution, and they complement the recent empirical literature on distributive cycles and productivity growth. Preliminary evidence from the Unido data-set also suggests the importance of directed technical change in developing countries. To illuminate the empirical procedure, I present a theoretical model of growth and distribution with directed technical change.     

Inflation and Productivity in Europe: An Empirical Investigation

Motivated by the ``Maastricht proposition' that nominal convergence will generate significant real benefits, the paper investigates the inflation-productivity nexus in fifteen European countries over the period 1960–1997. Modern econometric techniques organised around I(1) and cointegration analysis are used to test for the existence of a long-run relationship between inflation and productivity. Bayesian and recently developed causality testing procedures are employed to examine the inflation-productivity relationship. The empirical results suggest the existence of causality in seven countries. Causality is bi-directional in five cases. Notably, causality fails exactly where the ``Maastricht proposition' would be more useful: The European South and the smaller member states of the Union.     

Spillovers of volatility index: evidence from U.S., European,and Asian stock markets

We investigated the cross-market relations of volatility indexes with U.S. and non-U.S. stock market returns. We found that the pervasive VIX influence at both U.S. and non-U.S. stock markets. The VSTOXX and VKOSPI capture the major shocks to the global economy and show movements similar to the VIX. The empirical findings indicate that volatility index changes are important in explaining stock returns. We also examined spillover effects across volatility indexes. The VIX is a main transmitter, and the VKOSPI the main receiver, of these spillovers. The results point to a leading role for the VIX in the international market.     

风险投资引入与产业高质量发展——知识溢出的调节与门限效应

基于2005—2018年省级面板数据,试图回答地区风险投资引入能否促进产业高质量发展的问题。采用固定效应和门限回归分析方法,从产业发展质量层面,发现地区风险投资水平能够从产业价值创造、技术密集水平、绿色化发展等方面推动产业高质量发展。同时,风险投资对产业发展质量的作用机制受地区知识溢出水平的影响。结果显示,地区知识溢出对风险投资与产业价值创造、技术密集水平、绿色化发展间的关系均具有调节作用。进一步研究发现,这一调节作用还表现出门限效应。分区域研究结果表明,我国风险投资对产业高质量发展的推动作用主要体现在东部地区。从风险投资角度看,上述发现为地区产业高质量发展提供理论依据和现实参考。     

产业集聚与地区间劳动生产率差异

本文从产业集聚、劳动生产率、地区差距相互的紧密联系出发,认为非农产业规模报酬递增地方化是产业集聚的源泉,并提高了该区域劳动生产率,进而对地区差距产生了持久的影响。利用中国2004年地级城市和副省级城市的数据,我们发现大陆地区非农产业劳动生产率对非农就业密度的弹性系数为8.8%左右,高于现阶段欧美国家5%左右的水平。同时这一集聚效应在省际之间有存在差异和没有差异两种情况,在非农产业分布极不平衡的情况下,这都扩大了劳动生产率在各省之间的趋异,将地区差距维持在较高的水平上。     

The Sun Also Rises: Productivity Convergence Between Japan and the USA

The growth process for a technological leader is different from that of a follower. While followers can grow through imitation and capital deepening, a leader must undertake original research. This suggests that as the gap between the leader and the follower narrows, the follower must undertake more genuinely innovative R&D and possibly face a slower overall growth rate. The results of a dynamic panel equilibrium-correction model of productivity growth suggest that the productivity gap with the USA had a strong effect on the growth of Japanese manufacturing, and that changes in R&D intensity also made a significant contribution. Moreover, the effect of the productivity gap was significantly higher in industries that had higher R&D intensities, higher levels of human capital, and were more open to exports. This paper is based upon Chapter 5 of my D.Phil. thesis at the University of Oxford. It was partly written while I was a Visiting Scholar at the Foundation for Advanced Information & Research, Tokyo, and was supported by a Sanwa Bank Foundation Research Fellowship and ESRC grants R000234954 and R000237500.     

Productivity differences and inter-state migration in the U.S.: A multilateral gravity approach

In this paper, we study the quantitative role of productivity differences in explaining migration in presence of multiple destination choices. We construct a dynamic general equilibrium model with multi-region, multi-sector set-up where labor is a mobile input, which adjusts to regional and sectoral productivity shocks, resulting in migration across regions. The proposed model generates a migration network where the flow of migrants between any two regions follows a gravity equation. We calibrate the model to the U.S. data and we find that variation in industrial and regional total factor productivity shocks explains about 63% of the interstate migration in the U.S. Finally, we perform comparative statics to estimate the effects of long-run structural changes on migration. We find that capital intensity of the production process and the demand for services over manufactured goods negatively impact aggregate level of migration whereas asymmetries in trade patterns do not appear to have substantial effects.     

R&D spillovers and productivity: Evidence from U.S. manufacturing microdata

This paper deals with the estimation of the impact of technology spillovers on productivity at the firm level. Panel data for American manufacturing firms on sales, physical capital inputs, employment and R&D investments are linked to R&D data by industry. The latter data are used to construct four different sets of `indirect' R&D stocks, representing technology obtained through spillovers. The differences between two distinct kinds of spillovers are stressed. Cointegration analysis is introduced into production function estimation. Spillovers are found to have significant positive effects on productivity, although their magnitudes differ between high-tech, medium-tech and low-tech firms. First version received: April 1997/final version received: April 1999     

Intangible Capital and Labor Productivity Growth: Panel Evidence for the EU from 1998–2005

Using new international comparable data on intangible capital investment by business within a panel analysis between 1998 and 2005 in an EU country sample, a positive and significant relationship between intangible capital investment and labor productivity growth is detected. This relationship proves to be robust to a range of alterations. The empirical analysis confirms previous findings that the inclusion of business intangible capital investment in the asset boundary of the national accounting framework increases the rate of change of output per hour worked more rapidly. In addition, intangible capital is able to explain a significant portion of the unexplained international variance in labor productivity growth, and becomes a dominant source of growth.     

技术效率、技术进步与中国农业全要素生产率的提高——基于国际比较的实证分析

文章运用DEA方法测算了包括中国在内的20个人均土地资源较少的国家以及美国、澳大利亚和新西兰3个新大陆国家1961-2005年间的农业技术效率、技术进步及Malmquist生产率指数。实证结果显示:20世纪60年代以来,即使同样在人均土地资源较少的条件下,发达国家的农业全要素生产率的增长仍然快于发展中国家;在过去四十多年里,中国农业全要素生产率的提高同土地以及劳动等农业资源的配置效率有紧密关系,值得注意的是,中国农业土地要素存在过量投入的情况,这或许与中国土地制度没有完全市场化有直接关系。