Patents, Innovation and Growth

New growth theories emphasize the role played by innovation in promoting economic growth. Since it is difficult to quantify the amount of innovation undertaken in an economy, there is little available empirical evidence assessing the contribution made by innovation to growth, in contrast to abundant evidence on the role of physical capital accumulation in the growth process. In this paper patent data are used to proxy the amount of innovation undertaken in an economy. The patent data are used to explore two questions. First, how important is innovation to economic growth in Australia, and second, are reductions in innovations sourced in Australia offset by increases in foreign sourced innovations in Australia?     

Endogenous fiscal policies,environmental quality,and status-seeking behavior

This paper analyzes endogenous fiscal policy in an endogenous growth model where agents care about social status and environmental quality. The quest for a higher status is assimilated to a preference for capital wealth. The government uses income tax to finance infrastructure and environmental protection. We find that accounting for preferences for social status and environmental quality may lead to an allocation of tax revenue in favor of a cleanup effort to the detriment of infrastructure. Economic growth is not necessarily and negatively affected by this allocation as it is partly explained by an excessive accumulation of capital wealth due to the quest of status. Status seeking can however harm economic growth and environmental quality when its motive is important enough. Finally, we show that economic growth may be consistent with environmental preservation but is not necessarily welfare-improving as in the case of absence of status-seeking behavior.     

Does intellectual monopoly stimulate or stifle innovation?

This study develops an R&D-based growth model with vertical and horizontal innovation to shed some light on the current debate on whether patent protection stimulates or stifles innovation. We analyze the effects of patent protection in the form of blocking patents. We show that patent protection changes the direction of innovation by having asymmetric effects on vertical innovation (i.e., quality improvement) and horizontal innovation (i.e., variety expansion). Calibrating the model and simulating transition dynamics, we find that strengthening the effect of blocking patents stifles vertical innovation and decreases economic growth but increases social welfare due to an increase in horizontal innovation. In light of this finding, we argue that in order to properly analyze the growth and welfare implications of patents, it is important to consider their often neglected compositional effects on vertical and horizontal innovation.     

Effects of a blocking patent on R&D with endogenous survival activities

This study analyzes the effect of strengthening patent protection for innovation and economic growth by introducing a blocking patent into the endogenous growth model developed by Furukawa (Econ Lett 121(1):26–29, 2013a), which features survival activity of patent holders in the R&D sector with a variety-expansion model. Results show that strengthening patent protection can raise the economic growth rate and social welfare through an endogenous survival investment. Additionally, this study examines the effects of increasing subsidies for R&D. We find that increasing R&D subsidy rate can negatively affect economic growth and social welfare because of the investment for survival activities. This result shows the novel role of a blocking patent in determining innovation effects of R&D subsidies. Furthermore, we analyze the effect of patent breadth which is another patent instrument in this model on innovation and economic growth. Results show that the growth and welfare effects of the profit-division rule and the subsidy rate for R&D may vary with the size of patent breadth.     

新常态下的人力资本与经济增长——综合金融资本和创新创业的理论建模

在国内外形势的双重影响下,中国经济步入了"新常态"的阶段,放缓的经济增长步伐带来新的矛盾和挑战,经济增长模式从以往的粗放型逐渐向集约型转变,但以往的经济理论在经济新阶段都具有一定的局限性.本文使用主流宏观经济学前沿的建模方法将现有的四大经济增长理论囊括在一个综合模型中,把人力资本投资、金融资本投资、实物资本投资、创新创业活动、纳什博弈机制有机地结合在统一的分析框架下,对经济增长理论文献做出重要的概括和拓展.通过校准赋值和数值模拟,得出理论模型的基本结论:人力资本积累虽然可以通过创新和创业促进经济增长,但是其效果仍是递减的,呈现出新古典增长模型的属性.     

Growth and optimal policies in an R&D-growth model with imperfect international capital mobility

In this paper, we examine the effects of international capital mobility on innovation, growth, and optimal growth policies in a small open economy with R&D-driven growth. Households can borrow funds from an imperfect international capital market to finance their investment in R&D firms. We show that the economy can reach a higher growth rate if international capital is more mobile. This result is consistent with recent empirical findings. Moreover, we show that the common growth-enhancing policies, such as patent protection and the R&D subsidies, have an additional negative welfare effect when households can access the international capital market. Accordingly, the optimal patent protection and R&D subsidy should be smaller when the degree of international capital mobility is higher.     

社会资本的经济增长效应

全面而准确地探究社会资本对长期经济增长的影响机制,对提升社会资本在区域经济发展中的地位具有重大的现实意义,但传统的内生增长模型忽略了时间配置对社会资本积累与居民效用的影响.文章将社会资本积累过程内生化,构建了纳入社会资本的水平创新增长模型,综合考虑社会资本和闲暇时间对经济增长的非单调性影响,通过数值模拟发现:社会资本对经济增长具有边际效应递减的促进作用;而闲暇时间与经济增长之间呈现倒U形关系,即适当地增加闲暇时间有利于社会资本积累.文章还基于结构型社会资本的网络嵌入性特征,构建了地级市层面的社会资本测度指标,以验证社会资本具备生产要素的属性.实证结果表明:社会资本对经济增长具有显著的正向影响,其促进作用随着区域内城市经济发展水平的提高而提升;中西部地区社会资本的产出效率高于东部地区,从而间接反映了东部地区社会资本过度集聚的现状;投资水平与技术进步是社会资本影响经济增长的两条重要途径.上述结论为明晰社会资本的经济属性、激发社会资本的经济效益、推动城市集群协调发展以及缩小地区差异提供了有益的借鉴.     

Patent claims and economic growth

This study introduces a blocking patent on horizontal R&D into the endogenous growth model of Chu et al. (2012), which features a blocking patent on vertical R&D. Results show that strengthening patent protection on horizontal R&D promotes vertical innovation (quality improvement) but hinders horizontal innovation (variety expansion). This effect of a horizontal blocking patent on directionality of innovation is opposite to that of the vertical blocking patent analyzed by Chu et al. (2012). Results also show that under mild conditions, strengthening a blocking patent on horizontal innovation as well as on vertical innovation can increase economic growth and social welfare.     

Human capital use,innovation, patent protection,and economic growth in multiple regions

We provide the first theoretical analysis of the effects of human capital use, innovative activity, and patent protection, on economic growth in a model with many regions. In each region, consumers have constant relative risk-aversion preferences, there is no human capital growth, and there are three kinds of manufacturing activities involving the production of blueprints for inputs (machines), the inputs themselves, and a single final consumption good. Our analysis generates four results. For any given region, we first describe the balanced growth path (BGP) equilibrium and show that the BGP growth rate depends negatively on the rate at which patents expire. Second, we characterize the transitional dynamics in our model. Third, we determine the value of the patent expiry rate that maximizes the equilibrium growth rate of a region. Finally, we show that a policy of offering perpetual patent protection does not necessarily maximize social welfare in a region.     

The dynamics of catch-up and skill and technology upgrading in China

This paper accounts for China’s economic growth since 1980 in a unified endogenous growth model in which a sequencing of physical capital accumulation, human capital accumulation and innovation drives the rise in China’s aggregate income. The first stage is characterized by physical capital accumulation. The second stage includes both physical and human capital accumulation, and in the final stage innovation is added to the mix. Model calibrations indicate that the growth model can generate a trajectory that accords well with the different stages of development in China.     

数量驱动或创新驱动：异质型人力资本对经济增长的机制演进

基于1987-2017年中国省际面板数据,运用SYS-GMM模型研究异质型人力资本对经济增长的影响。在区分高级与基本人力资本基础上,基于招生率和收入维度,从全局和阶段差异视角剖析异质型人力资本对经济提速的机制演进。研究发现：全局而言,两种测度下基础和高级人力资本各自以数量及创新方式驱动经济增长,并呈现以数量驱动为主,数量、创新双驱动的增长模式;从演进视角看,两种测度均表明,高级人力资本创新驱动是新常态阶段经济增长的核心动力,但相比旧常态阶段,基础人力资本数量驱动日趋弱化并呈异质性;进一步研究表明,产业结构、城镇化及开放程度均对创新驱动有不同程度激励效应,而城镇化是挤出数量驱动的主要推手。     

Migration, human capital accumulation and economic development

We study how the possibility of migration changes the composition of human capital in sending countries, and how this affects development. In our model, growth is driven by productivity growth, which occurs via imitation or innovation. Both activities use the same types of skilled labour as input, albeit with different intensities. Heterogenous agents accumulate skills in response to economic incentives. Migration distorts these incentives, and the accumulation of human capital. This slows down, or even hinders, economic development. The effect is stronger, the farther away the country is from the technological frontier.     

Exports,investments and economic development of pre-accession countries of the European Union: an empirical investigation of Bulgaria and Romania

This paper attempts to analyse the relationship between exports, investments and economic development in two pre-accession countries of the European Union, Bulgaria and Romania. For investigation of this relationship a multivariate autoregressive VAR model is used. The results of cointegration analysis showed that there is one cointegrated vector among exports, investments and economic growth for the two countries. Granger causality tests based on error correction models (ECM) indicated that there is a ‘strong Granger causal’ relation between economic growth and exports as well as between investments and exports for the two countries. In addition, economic development and capital accumulation in an economy seem to have just as much of an influence on exports as exports have on capital accumulation and economic development.     

Migration,human capital accumulation and economic development

We study how the possibility of migration changes the composition of human capital in sending countries, and how this affects development. In our model, growth is driven by productivity growth, which occurs via imitation or innovation. Both activities use the same types of skilled labour as input, albeit with different intensities. Heterogenous agents accumulate skills in response to economic incentives. Migration distorts these incentives, and the accumulation of human capital. This slows down, or even hinders, economic development. The effect is stronger, the farther away the country is from the technological frontier.     

Population and Economic Growth Under Different Growth Engines

Using a growth model with physical capital accumulation, human capital investment and horizontal R&D activity, this paper proposes an alternative channel through which an increase in the population growth rate may yield a non‐uniform (i.e., a positive, negative, or neutral) impact on the long‐run growth rate of per‐capita GDP, as available empirical evidence seems mostly to suggest. The proposed mechanism relies on the nature of the process of economic growth (whether it is fully or semi‐endogenous), and the peculiar engine(s) driving economic growth (human capital investment, R&D activity, or both). The model also explains why in the long term the association between population growth and productivity growth may ultimately be negative when R&D is an engine of economic growth.     

Public capital and patterns of growth in the presence of threshold externalities

This paper studies the relation between public capital accumulation and long-run economic growth. We emphasize three phenomena that may be accompanied by the presence of public capital: increasing returns, rivalry, and threshold externalities. We formulate a simple growth model that captures these features of public capital in a tractable manner. Assuming that investment for public capital financed by income taxation, we show that the threshold externalities may generate multiple equilibria, so that the pattern of growth and the realization of a specific steady-growth equilibrium are quite sensitive to the rate of income tax as well as to expectations of agents.     

R＆D、R＆D溢出、内生增长和内生收敛

根据强调知识与技术创新、知识与技术溢出重要性的当代内生增长理论，本文建立了一个将R＆D和R＆D溢出与资本积累之间、R＆D和R＆D溢出与总产出增长之间直接关联起来的动态模型。面板数据协整检验实证分析结果表明R＆D和R＆D溢出与资本积累之间、R＆D和R＆D溢出与总产出增长之间分别存在显著的正面长期协整关联。进一步的分析表明，R＆D与资本积累之间、R＆D与总产出增长之间分别存在显著的长期双向格兰杰因果关系。由此观知，R＆D乃长期经济增长源泉之所在。另一方面，尽管资本积累或总产出增长并不格兰杰导致R＆D溢出，证据表明R＆D溢出格兰杰导致资本积累和总产出增长。这种由R＆D溢出到资本积累和总产出增长的单向格兰杰因果关系意味着尽管知识与技术的跨国传播并非必然发生。其实为世界经济增长的重要动力。     

资本回报率增长的最优知识产权保护强度研究——基于82个国家面板数据的实证

基于制度层面分析资本回报率变动的动因有助于探索经济增长新动力。计算82个国家的资本回报率，并基于知识产权保护视角对其变动机制进行分析，得出以下主要结论：①资本回报率增长存在最优知识产权保护强度，但发展中国家的理论最优强度小于发达国家；②发展中国家知识产权保护以远离最优强度状态促进资本回报率提升，发达国家则以接近最优强度状态促进资本回报率提升；③金融危机后，知识产权保护的促进效应在发展中国家更加明显，在发达国家有所弱化；④机制分析显示，知识产权保护通过促进技术创新提升资本回报率。     

创新型增长视角下的金融发展：综述及展望

传统经济增长理论分析框架下,金融系统只影响资本形成,并不创造社会财富,它对经济增长的作用只有水平效应而没有增长效应。新增长理论,尤其是熊彼特增长理论．突破了新古典增长理论关于技术进步的外生性假设,强调资本积累和创新是促进技术进步和经济增长的重要力量,这为研究金融体系对技术进步和经济增长的促进作用提供了全新视角。当前,中国金融发展现状与创新型增长要求之间存在一定程度的不相容性,需要在制度、政策和监管体系上不断完善与变革,逐步实现科技创新和金融发展的良性互动。     

创新驱动产业结构升级的制度基础——基于门槛模型的实证研究

在经济发展动能依靠创新驱动产业结构升级的新阶段，制度基础是否为新动能提供了有效激励？基于2009—2016年中国内地省际数据，采用非线性面板门槛模型，实证研究市场化、政府创新扶持、技术市场发育、金融发展和知识产权保护等5个制度因素对创新驱动产业结构升级的影响。结果发现：①市场和政府对创新驱动产业升级的作用并不是非此即彼，加速市场化进程和加大政府创新扶持均会产生显著促进作用；②促进技术市场发育和加强知识产权保护对创新驱动产业结构升级有显著促进作用；③以贷款余额表示的金融发展并未对创新驱动产业结构升级产生显著性影响，表明存在金融错配，金融资本并未有效进入创新领域。