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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Intellectual Property and the Knowledge Economy’s Global Division of Labor: Producing Taiwanese Green-Technology Between the United States and China

West, Matthew Ellis January 2015 (has links)
The social scientific study of globalization's increasing flows of commodities, financing, knowledge, media, and people has been a productive ground for investigating changing connections among geographically distant people and their consequences. In spite of this recent focus on movement and flows, however, I suggest that our knowledge of globalization is incomplete without an understanding of the infrastructures of stoppage that underlie and determine the ongoing shape and directionalities of that movement. This dissertation lays out an argument for patents as one such critical legal infrastructure of global stoppage that provides unique insight into the changing roles and challenges confronting China and Taiwan within global systems of production, consumption, creativity, and copying. The dissertation's ethnography of patents in practice is based on 20 months of fieldwork on the production of technological knowledge and property in it within a Taiwanese LED (light emitting diode) company that produces patents between Taiwan and the United States and products between Taiwan and China. I argue that the processes by which knowledge is extracted and translated from the lab to the law decouples the knowledge from its origins in machines, materials, and engineers. This decoupling enables patents to circulate separately from these and provides owners with new control over global flows of engineers, tangible commodities, and usable knowledge. Alongside my Taiwanese interlocutors, I argue that patents are best understood as weapons of competition: more similar to non-disclosure agreements or aggressive pricing tactics than copyright or other forms of “intellectual property.” As weapons, the deployment of patents encourages the production of new patents much more than it does technological innovation. As they are currently practiced, patents therefore enable flows, but do so only in particular directions. It is through this stoppage that high tech patents create and maintain global divisions of labor, profit, and environmental risk.
2

Patent races and market structure

Vickers, John January 1985 (has links)
This thesis is a theoretical study of relationships between patent races and market structure. The outcome of a patent race can be an important determinant of market structure. For example, whether or not a new firm enters a market may depend upon its winning a patent race against an incumbent firm already in that market. Moreover, market structure can be a major influence upon competition in a patent race. In the example, the asymmetry between incumbent and potential entrant has an effect upon their respective incentives in the patent race. Chapter I discusses models of R and D with uncertainty. We show that, as the degree of correlation between the uncertainties facing rival firms increases, R and D efforts increase under some, but not all, conditions, and the number of active competitors falls. Chapter II discusses the approach of representing patent races as bidding games. We examine a model in which several incumbent firms compete with a number of potential entrants in a patent race, and ask whether the incumbents have an incentive to form a joint venture to deter entry. They do so if and only if the patent does not offer a major cost improvement. In Chapter III we examine the strategic interactions between competitors during the course of a race, in an attempt to clarify (for different types of race) the idea that a race degenerates when one player becomes 'far enough ahead' of his rivals, in a sense made precise. In Chapter IV we examine the evolution of market structure in a duopoly model when there is a sequence of patent races. The nature of competition in the product market is shown to determine whether one firm becomes increasingly dominant as industry leader, or whether there is 'action - reaction' between firms.
3

Essays on the innovation and intellectual property system in Vietnam

Tuan Anh, Vu 20 December 2012 (has links)
This dissertation provide not only a comprehensive overview on concepts and models of innovation, but it also provide critical analysis on the intellectual property system with an emphasize on the patent system and enforcement system in Vietnam. The empirical findings have suggested that legal business types, firm's age are amongst the determinant characteristics that indicate manufacturing innovation. Furthermore, a number of factors including rewarding scheme,average employee education,collaboration, training are the factors that influence manufacturing innovation.<p>Moreover, an in depth study on the patenting cost system of the fast developing ASEAN countries and China explore the impact of FDI and the patenting cost on the growth of resident patent registration ,which is observed following the traditional demand curve. With poor infranstructure and lack of competent IP personnel, the quality of patent granted is in questionaire. Finally, this research explore in depth the enforcement systems in Vietnam, which need further reform. / Doctorat en Sciences économiques et de gestion / info:eu-repo/semantics/nonPublished
4

Essays on the globalization of innovation using patent-based indicators

Danguy, Jérôme 17 September 2013 (has links)
Compared to the globalized markets of goods and services, technology production has been often described as “far from globalized” and mainly concentrated in the home country of multinational enterprises. However, academics and international organizations recognize that research and development (R&D) activities are increasingly performed at the international level. In particular, the globalization of innovation is a major concern since it is at the crossroads of the rising importance of knowledge economy and the increasing international slicing of firms’ value chains. In this context, the main motivations of this thesis are to investigate the extent to which innovation takes place across national borders and to analyze the drivers of this phenomenon across countries and across industries. For this purpose, this dissertation provides new evidence on the globalization of innovation in four empirical essays using patent-based indicators.<p><p>First, the relevance of patent statistics as indicators of innovation is evaluated by studying the relationship between expenditures in R&D activities and patenting efforts. Chapter 2 decomposes this relationship at the industry level to shed light on the origins of the worldwide surge in patent applications. The empirical investigation of the R&D-patent relationship relies on a unique panel dataset composed of 18 manufacturing industries in 19 countries covering the period from 1987 to 2005, for which five broad patent indicators are developed. This study shows that patent applications at the industry level reflect not only research productivity, but also two main components of the propensity to patent which are firms’ strategic considerations: the decision to protect an invention with a patent (the “appropriability strategy”) and the number of patents filed to protect an innovation (the “filing strategy”). The comparison between the results for various patent count indicators provides also interesting insights. While some industries (computers and communication technologies) and countries (South Korea, Spain, and Poland) have experienced a drastic increase in patent applications, the ratio of priority patent applications to R&D expenditures has been generally constant. This result suggests that there has been no spurt in innovation productivity. In contrast, regional applications (filings at the United States Patent and Trademark Office or at the European Patent Office) have been increasing since the early 1990s, suggesting that the patent explosion observed in large regional patent offices is due to the greater globalization of intellectual property rights rather than a surge in research productivity. Innovative firms are increasingly targeting global markets and hence have a higher tendency to seek protection in key markets worldwide.<p><p>Chapter 3 introduces, firstly, aggregate patent-based indicators to measure the globalization of innovation production. Secondly, it describes the patterns in international technology production for a large panel dataset covering 21 industries in 29 countries from 1980 to 2005. A strong growth in the intensity of globalization of innovation is confirmed not only in terms of cross-border ownership of innovation, but also in terms of international technological collaborations. More interestingly, heterogeneity across countries and industries is observed. On the one hand, more innovative countries (or industries) do not present more globalized innovation footprint. On the other hand, the ownership of innovation is still strongly concentrated in a few countries, although its location is increasingly dispersed across the world. Thirdly, it investigates empirically two main opposing motives driving the internationalization of innovation: home-base augmenting and home-base exploiting strategies. The results show that the degree of internationalization of innovation is negatively related to the revealed technological advantage of countries across industries. Countries tend to be more technologically globalized in industrial sectors in which they are less technologically specialized. The empirical findings suggest also that countries with multidisciplinary technological knowledge are more likely to take part in international co-inventions of new technologies and to be attractive for foreign innovative firms. This aggregated patent-based analysis provides additional evidence that globalization of innovation is a means of acquiring competences abroad that are lacking at home, suggesting that home-base augmenting motives matter in the globalization of innovation production. By contrast, the internationalization of innovation does not seem to be purely market-driven since large economies are not the target of foreign innovative firms and international patenting is more related to international competitiveness of country-industry pairs than to the direction of trade flows.<p><p>While the previous chapter studies the globalization of innovation of a country with the rest of world, Chapter 4 aims at explaining who collaborates with whom in the international production of technology. In particular, the impact of technological distance between partner’s economies is investigated for a panel dataset covering international co-inventions between 29 countries in 21 industries between 1988 and 2005. The descriptive analysis highlights that the overall growth in internationalization of innovation is due to both the increase in the number of international innovative actors and the rise of the average intensity of collaboration. The empirical findings then suggest that the two main arguments related to technological distance – ‘similarity versus diversity’ – can be reconciled by taking an industry approach. Indeed, the estimation results show that the impact of technological distance is twofold on the intensity of collaborative innovation at industry level. On the one hand, the more similar the industry-specific knowledge of two countries (low technological distance within the industry), the more easily they collaborate by sharing common industrial knowledge. On the other hand, the more different their non-industry-specific knowledge (high technological distance outside the scope of the industry), the more they collaborate to gain access to broad and interdisciplinary expertise. It suggests that the relative absorptive capacity between partner’s economies and the search for novel and complementary knowledge are key drivers of the globalization of innovation. Moreover, the results confirm the moderating effect of non-technological distance factors (spatial proximity, ease of communication, institutional proximity, and overall economic ties) in cross-border innovative relationships. <p><p>The topic of Chapter 5 is the cost-benefit analysis of the creation of a new ‘globalized’ patent: the EU Patent (formerly known as Community Patent) which consists in a single patent covering the entire EU territory for both application procedure and legal enforcement after grant. The objective of this chapter is threefold: (i) simulate the budgetary consequences in terms of renewal fees’ income for the European and national patent offices; (ii) evaluate the implications for the business sector in terms of absolute and relative fees; (iii) assess the total economic impact for the most important actors of the European patent system. Based on an econometric model explaining the determinants of the maintenance rate of patents, the simulations suggest that – with a sound renewal fee structure – the EU patent could generate more income for nearly all patent offices than under the current status quo. It would, at the same time, substantially reduce the relative patenting costs for applicants. Finally, the loss of economic rents by patent attorneys, translators and lawyers, and the drop of controlling power by national patent offices elucidate further the persistence of a fragmented European patent system.<p> / Doctorat en Sciences économiques et de gestion / info:eu-repo/semantics/nonPublished
5

Essays on patent systems and academic patenting

Mejer, Malwina 05 October 2012 (has links)
The past decade has witnessed a second academic revolution with the new role of contributing to economic growth and social development assigned to universities. A real phenomenon embedded in this new role is the right given to universities to file for a patent protection over publicly funded research and the possibility to retain financial returns from its license or selling. The aim of this thesis is to better understand this phenomenon and its relationship to scientific production.<p><p>Starting with the role patents pay in stimulating innovation, Chapter 2 assesses the cost of rewarding and enforcing exclusive patent rights in Europe and discusses implications for patenting at universities.<p><p>Chapter 3 aims to document patenting at universities in Belgium by applying the definition of university-invented patents. It challenges the ‘European Paradox’, the view that despite being good in producing science, European research institutions are not successful in transferring it to the real economy.<p><p>Chapters 4 and 5 investigate the relationship between patenting and scientific productivity. Chapter 4 questions the critique that patenting at universities may have a detrimental effect on scientific progress. Chapter 5 challenges the view that knowledge diversity increases group ability to innovate. It further enhances our understanding of how different ways of achieving diversity affect team inventive performance.<p> / Doctorat en Sciences économiques et de gestion / info:eu-repo/semantics/nonPublished
6

Essays on the propensity to patent: measurement and determinants

de Rassenfosse, Gaétan 28 May 2010 (has links)
Chapter 1 discusses the econometric pitfalls associated with the use of patent production functions to study the invention process. It then goes on to argue that a sound understanding of the invention process necessarily requires an understanding of the propensity to patent. The empirical analysis carried out in Chapter 1 seeks to explain the proportion of inventions patented – a potential metric for the propensity to patent – from an international sample of manufacturing firms. <p><p>Chapter 2 proposes a methodology to filter out the noise induced by varying patent practices in the R&D-patent relationship. The methodology explicitly decomposes the patent-to-R&D ratio into its components of productivity and propensity. It is then applied to a novel data set of priority patent applications in four countries and six industries.<p><p>Chapter 3 takes stock of the literature on the role of fees in patent systems while Chapter 4 presents estimates of the price elasticity of demand for patents at the trilateral offices (that is, in the U.S. Japan and Europe). The estimation of dynamic panel data models of patent applications suggests that the long-term price elasticity is about -0.30.<p> / Doctorat en Sciences économiques et de gestion / info:eu-repo/semantics/nonPublished
7

Essays on the empirical analysis of patent systems

van Zeebroeck, Nicolas 13 March 2008 (has links)
1. The context: The European patent system has been affected by substantial changes over the past three decades, which have raised vigorous debates at different levels. The main objective of the present dissertation is to contribute to these debates through an exploratory analysis of different changes in patenting practices – in particular the way applications are drafted and filed to patent offices –, their drivers, association with the value of patents, and potential impact on the patent system. The coming essays are therefore empirical in their essence, but are inspired by economic motivations and concerns. Their originality is threefold: it resides in the novelty of the main questions discussed, the comprehensive database specifically built to address them, and the range of statistical methods used for this purpose. The main argument throughout these pages is that patenting practices have significantly evolved in the past decades and that these developments have affected the patent system and could compromise its ability to fulfil its economic purpose. The economic objective of patents is to encourage innovation and its diffusion through the public disclosure of the inventions made. But their exploitation in the knowledge economy has assumed so many different forms that inventors have supposedly developed new patenting and filing strategies to deal with these market conditions or reap the maximum benefits from their patents. The present thesis aims at better understanding the dimensions, determinants, and some potential consequences of these developing practices.<p><p>2. The evolution: Chapter 2 presents a detailed descriptive analysis of the evolution in the size of patent applications filed to the European Patent Office (EPO). In this chapter, we propose two measures of patent voluminosity and identify the main patterns in their evolution. Based on a dataset with about 2 million documents filed at the EPO, the results show that the average voluminosity of patent applications – measured in terms of the number of pages and claims contained in each document – has doubled over the past 25 years. Nevertheless, this evolution varies widely across countries, technologies and filing procedures chosen by the applicant. This increasing voluminosity of filings has a strong impact on the workload of the EPO, which justifies the need for regulatory and policy actions.<p><p>3. The drivers: The evolution in patent voluminosity observed in chapter 2 calls for a multivariate analysis of its determinants. Chapter 3 therefore proposes and tests 4 different hypotheses that may contribute to explaining the observed inflation in size: the influence of national laws and practices and their diffusion to other countries with the progressive globalization of patenting procedures, the complexification of research activities and inventions, the emergence of new sectors with less established norms and vocabularies, and the construction of patent portfolios. The econometric results first reveal that the four hypotheses are significantly associated with longer documents and are therefore empirically supported. It appears however that the first hypothesis – the diffusion of national drafting practices through international patenting procedures – is the strongest contributor of all, resulting in a progressive harmonization of drafting styles toward American standards, which are longer by nature. The portfolio construction hypothesis seems a less important driver but nevertheless highlights substantial changes in patenting practices. These results raise two questions: Do these evolving patenting practices indicate more valuable patents? Do they induce any embarrassment for the patent system?<p><p>4. Measuring patent value: If the former of these two questions is to be addressed, measures are needed to identify higher value patents. Chapter 4 therefore proposes a review of the state of the art on patent value indicators and analyses several issues in their measurement and interpretation. Five classes of indicators proposed in the literature may be obtained directly from patent databases: the number of countries in which each patent is enforced, the number of years during which each patent has been renewed, the grant decision taken, the number of citations received from subsequent patents, and whether it has been opposed by a third party before the EPO. Because the former two measures are closely connected (the geographical scope of protection and length of maintenance can hardly be observed independently), they have been subjected to closer scrutiny in the first section of chapter 4, which shows that these two dimensions have experienced opposite evolutions. A composite measure – the Scope-Year Index – reveals that the overall trend is oriented downwards, which may suggest a substantial decline in the average value of patents. The second section of chapter 4 returns to the five initial classes of measures and underlines their main patterns. It appears that most of them witness the well-known properties of patent value: a severe skewness and large country and technology variations. A closer look at their relationships, however, reveals a high degree of orthogonality between them and opposite trends in their evolution, suggesting that they actually capture different dimensions of a patent’s value and therefore do not always pinpoint the same patents as being the most valuable. This result strongly discourages the reliance on one of the available indicators only and opens some avenue for the creation of one potential composite index of value based upon the five indicators to maximize the chances of capturing all potentially valuable patents in a large database. The proposed index reflects the intensity of the signal provided by all 5 constituting indicators on the potential value of each patent. Its declining trend reflects a rarefaction of this signal on average, leading to different plausible interpretations.<p><p>5. The links with patent value: Based upon the six indicators of value proposed in chapter 4 (the five classical ones plus the composite), the question of the association between filing strategies and the value of patents may be analysed. This question is empirically addressed in chapter 5, which focuses on all EPO patents filed between 1990 and 1995. The first section presents a comprehensive review of the existing evidence on the determinants of patent value. The numerous contributions in the field differ widely along three dimensions (the indicator of value chosen as dependent variable, the sampling methodology, and the set of variables tested as determinants), which have translated into many ambiguities across the literature. Section 2 proposes measures to identify different dimensions of filing strategies, which are essentially twofold: they relate to the routes followed by patent filings toward the EPO (PCT, accelerated processing), and to their form (excess claims, share of claims lost in examination), and construction (by assembly or disassembly, divisional). These measures are then included into an econometric model based upon the framework provided by the literature. The proposed model, which integrates the set of filing strategy variables along with some of the classical determinants, is regressed on the six available indicators separately over the full sample. In addition, the sensitivity of the available results to the indicator and the sampling methodology is assessed through 18 geographic and 14 industrial clustered regressions and about 30 regressions over random samples for each indicator. The estimates are then compared across countries, industries and indicators. These results first reveal that filing strategies are indicative of more valuable patents and provide the most stable determinants of all. And third, the results do confirm some classical determinants in their positive association with patent value, but highlight a high degree of sensitivity of most of them to the indicator or the sample chosen for the analysis, requiring much care in generalizing such empirical results.<p><p>6. The links with patent length: Chapter 6 focuses on one particular dimension of patent value: the length of patents. To do so, the censored nature of the dependent variable (the time elapsed between the filing of a patent application and its ultimate fall into the public domain) dictates the recourse to a survival time model as proposed by Cox (1972). The analysis is original in three main respects. First of all, despite the fact that renewal data have been exploited for about two decades to obtain estimates of patent value (Pakes and Schankerman, 1984), this chapter provides – to the best of our knowledge – the first comprehensive analysis of the determinants of patent length. Second, whereas most of the empirical literature in the field focuses on granted patents and investigates their maintenance, the analysis reported here includes all patent applications. This comprehensive approach is dictated by the provisional rights provided by pending applications to their holders and by the legal uncertainty these represent for competitors. And third, the model integrates a wide set of explanatory variables, starting with the filing strategy variables proposed in chapter 5. The main results are threefold: first, they clearly show that patent rights have significantly increased in length over the past decades despite a small apparent decline in the average grant rate, but largely due to the expansion of the examination process. Second, they indicate that most filing strategies induce considerable delays in the examination process, possibly to the benefit of the patentee, but most certainly to the expense of legal uncertainty on the markets. And third, they confirm that more valuable patents (more cited or covering a larger geographical scope) take more time to process, and live longer, whereas more complex applications are associated with longer decision lags, but also with lower grant and renewal rates.<p><p>7. Conclusions: The potential economic consequences and some policy implications of the findings from the dissertation are discussed in chapter 7. The evolution of patenting practices analysed in these works has some direct consequences for the stakeholders of the patent system. For the EPO, they generate a considerable increase in workload, resulting in growing backlogs and processing lags. For innovative firms, this phenomenon translates into an undesired increase in legal uncertainty, for it complicates the assessment of the limits to each party’s rights and hence of the freedom to operate on a market, which is precisely what the so-called ‘patent trolls’ and ‘submariners’ may be looking for. Although empirical evidence is lacking, some fear that this may result in underinvestment in research, development or commercialization activities (e.g. Hall and Harhoff, 2004). In addition, legal uncertainty is synonymous with an increased risk of litigation, which may hamper the development of SMEs and reduce the level of entrepreneurship. Finally, for society, we are left with a contrasted picture, which is hard to interpret. The European patent system wishes to maintain high quality standards to reduce business uncertainty around granted patents, but it is overloaded with the volume of applications filed, resulting in growing backglogs which translate into legal uncertainty surrounding pending applications. The filing strategies that contribute to this situation might reflect a legitimate need for more time and flexibility in filing more valuable patents, but they could also easily turn into real abuses of the system, allowing some patentees to obtain and artificially maintain provisional rights conferred by pending applications on inventions that might not meet the patentability requirements. Distinguishing between these two cases goes beyond the scope of the present dissertation, but should they be found abusive, they should be fought for they consume resources and generate uncertainty. And if legitimate, then they should be understood and the system adapted accordingly (e.g. by adjusting fees to discourage some strategies, raising the inventive step, fine-tuning the statutory term in certain technologies, providing more legal tools for patent examiners to reject unpatentable applications, etc.) so as to better serve the need of inventors for legal protection in a more efficient way, and to adapt the patent system to the challenges it is or will be facing. / Doctorat en Sciences économiques et de gestion / info:eu-repo/semantics/nonPublished
8

Essays on the value of academic patents and technology transfer / Essais sur la valeur des brevets universitaires et le transfert de technologie

Sapsalis, Eleftherios 12 June 2007 (has links)
Around the world, knowledge and technology transfer have moved to the forefront of attention in economic, social and industrial policy. As the origins of future development increasingly derives from innovation, attention is paid more and more to non-traditional sources that have the potential to become the basis for creation of new businesses or the catalyser for the rejuvenation of old ones. Among those sources, we find university. These last years, academic patents have been one of the emerging phenomena witnessing the growing evolvement of university in the innovation process. The aim of this doctoral dissertation is to analyse the transfer of technology from university to industry through the analysis of patents. This work pursuits a threefold approach. First, it intends to analyse which characteristics determine the propensity of a university to get involved in technology transfer and more specifically to apply for a patent. Second, it disentangles the underlining value determinants of the patents to decode the value of academic patents and to identify the research processes that are leading to the most valuable inventions. Finally, it investigates the relevancy of academic patenting for innovation in general and wonders if on the long run, such practices could put innovation at risk. / Doctorat en Sciences économiques et de gestion / info:eu-repo/semantics/nonPublished
9

Economic and technological performances of international firms

Cincera, Michele 29 April 1998 (has links)
The research performed throughout this dissertation aims at implementing quantitative methods in order to assess economic and technological performances of firms, i.e. it tries to assess the impacts of the determinants of technological activity on the results of this activity. For this purpose, a representative sample of the most important R&D firms in the world is constituted. The micro-economic nature of the analysis, as well as its international dimension are two main features of this research at the empirical level.<p><p>The second chapter illustrates the importance of R&D investments, patenting activities and other measures of technological activities performed by firms over the last 10 years.<p><p>The third chapter describes the main features as well as the construction of the database. The raw data sample consists of comparable detailed micro-level data on 2676 large manufacturing firms from several countries. These firms have reported important R&D expenditures over the period 1980-1994.<p><p>The fourth chapter explores the dynamic structure of the patent-R&D relationship by considering the number of patent applications as a function of present and lagged levels of R&D expenditures. R&D spillovers as well as technological and geographical opportunities are taken into account as additional determinants in order to explain patenting behaviours. The estimates are based on recently developed econometric techniques that deal with the discrete non-negative nature of the dependent patent variable as well as the simultaneity that can arise between the R&D decisions and patenting. The results show evidence of a rather contemporaneous impact of R&D activities on patenting. As far as R&D spillovers are concerned, these externalities have a significantly higher impact on patenting than own R&D. Furthermore, these effects appear to take more time, three years on average, to show up in patents.<p><p>The fifth chapter explores the contribution of own stock of R&D capital to productivity performance of firms. To this end the usual productivity residual methodology is implemented. The empirical section presents a first set of results which replicate the analysis of previous studies and tries to assess the robustness of the findings with regard to the above issues. Then, further results, based on different sub samples of the data set, investigate to what extent the R&D contribution on productivity differs across firms of different industries and geographic areas or between small and large firms and low and high-tech firms. The last section explores more carefully the simultaneity issue. On the whole, the estimates indicate that R&D has a positive impact on productivity performances. Yet, this contribution is far from being homogeneous across the different dimensions of data or according to the various assumptions retained in the productivity model.<p><p>The last empirical chapter goes deeper into the analysis of firms' productivity increases, by considering besides own R&D activities the impact of technological spillovers. The chapter begins by surveying the alternative ways proposed in the literature in order to asses the effect of R&D spillovers on productivity. The main findings reported by some studies at the micro level are then outlined. Then, the framework to formalize technological externalities and other technological determinants is exposed. This framework is based on a positioning of firms into a technological space using their patent distribution across technological fields. The question of whether the externalities generated by the technological and geographic neighbours are different on the recipient's productivity is also addressed by splitting the spillover variable into a local and national component. Then, alternative measures of technological proximity are examined. Some interesting observations emerge from the empirical results. First, the impact of spillovers on productivity increases is positive and much more important than the contribution of own R&D. Second, spillover effects are not the same according to whether they emanate from firms specialized in similar technological fields or firms more distant in the technological space. Finally, the magnitude and direction of these effects are radically different within and between the pillars of the Triad. While European firms do not appear to particularly benefit from both national and international sources of spillovers, US firms are mainly receptive to their national stock and Japanese firms take advantage from the international stock.<p> / Doctorat en sciences économiques, Orientation économie / info:eu-repo/semantics/nonPublished

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