Patent Policy in an Endogenous Growth Model

We investigate how the patent policy affects economic growth and social welfare based on an endogenous growth model with R&D activities. We show that the patent length that maximizes the social welfare is finite. Moreover, by introducing compulsory licensing, we also show that the patent length that maximizes the social welfare is not infinite even if the royalty rate can be controlled. Received June 29, 2001; revised version received February 5, 2002 Published online: February 17, 2003 We wish to thank two anonymous referees for their constructive comments. We also thank Akira Yakita for his helpful comments.     

Inflationary Financing of Government Expenditure in an Endogenous Growth Model

This paper analyses the role of inflation in economies with endogenous growth and congestion in public services. Optimal policy rules are derived for public services and investment. The other findings are as follows. Monetary policy should maximize economic growth. The more inefficient the public sector is, the higher the growth‐maximizing inflation rate is. If a currency union accepts a new member with an inefficient public sector, this will boost inflation in the union and decrease growth and welfare in all member economies of the union.     

The Microeconomics of an R&D-Based Model of Endogenous Growth

This paper explores the microeconomic structure underlying a class of endogenous growth models in which product differentiation and stochastic quality growth coexist. The general equilibrium model generates a stationary stochastic equilibrium in which a nondegenerate ergodic distribution of firm size depends systematically on parameters of the model. Features of the model necessary for stable endogenous aggregate growth are explored, and predictions of the model are compared with microeconometric evidence on R&D intensity, firm growth, and concentration.     

On Welfare Criteria and Optimality in an Endogenous Growth Model

In this paper, we explore the consequences for optimality of a social planner adopting two different welfare criteria. The framework of analysis is an overlapping generations model with physical and human capital. We first show that, when the social welfare function is a discounted sum of individual utilities defined over consumption per unit of natural labor, the precise cardinalization of the individual utility function becomes crucial for both the characterization of the social optimum and the policies that support it. Also, decentralizing the social optimum requires an education subsidy that is definitely positive, but its size depends in a determinant way on the aforementioned cardinalization. In contrast, when the social welfare function is a discounted sum of individual utilities defined over consumption per unit of efficient labor, the precise cardinalization of preferences becomes irrelevant. More strikingly, along the optimal growth path, the education subsidy is negative, i.e., the planner should tax rather than subsidize investments in human capital.     

Long-Run Effects of Monetary Expansion in a Two-Sector Model of Endogenous Growth

This paper explores the long-run effects of monetary expansion by introducing a cash-in-advance constraint into one of the basic models of endogenous growth. In our model, the real side of the economy consists of two production sectors, one of which produces a final good that can be used either for consumption or for investment and the other produces new human capital. Both sectors use physical and human capital under constant returns to scale technologies. We first characterize the balanced-growth equilibrium and then examine how a rise in money growth affects the relevant variables, such as the long-term growth rate and the relative prices.     

Status,Risk-Taking and Intertemporal Substitution in an Endogenous Growth Model

This paper examines intertemporal risk-taking in a stochastically growing economy with externalities in human capital accumulation where agents have preferences for social status. In order to isolate the effects of status concerns on long-run expected growth, the analysis is embedded in a non-expected utility setting, which disentangles the effects from risk aversion and intertemporal substitution. We examine the interaction between status desire and risk, risk aversion and intertemporal substitution. The externalities generated by the status game are able to correct the allocative distortions from the knowledge spillovers.Acknowledgement The author would like to thank an anonymous referee for his valuable comments.     

Patents in a Model of Endogenous Growth

This paper examines patent protection in an endogenous-growth model. Our aim is twofold. First, we show how the patent policies discussed by the recent patent-design literature can influence R&D in the endogenous-growth framework, where the role of patents has been largely ignored. Second, we explore how the general-equilibrium framework contributes to the results of the patent-design literature. In a general-equilibrium model, both incentives to innovate and monopoly distortions depend on the proportion of industries that conduct R&D. Furthermore, patents affect the allocation of R&D resources across industries, and patents can distort resources away from industries where they are most productive.     

The Transition to Market Economies in an Endogenous Growth Model with Altruistic Agents

This paper considers an endogenous transition from a self-sufficient traditional economy to a market economy and its consequences on fertility and growth. The transition can occur if private intergenerational transfers are unable to secure old-age consumption as adequately as savings on capital markets; otherwise individuals stay in the traditional economy unless the mass-production technology in the market economy is sufficiently more advanced than individually accessible technologies. Markets emerge only if per capita output exceeds a certain level given a fixed cost of forming markets. The transition reduces fertility and promotes growth under plausible restrictions.
JEL Classification : E 20; J 13; O 10     

Learning-by-doing versus Schooling in a Model of Endogenous Growth

A two sector model of learning-by-doing measured by means of production aggregated over time and of human capital accumulation in a schooling sector is presented. Time utilization is rival between schooling and learning-by-doing. Depending on the sum of elasticities of the accumulated factors (i.e., of production experience and educational human capital) in both sectors, a situation with or without endogenous growth results. Dynamic optimization of the choice between leisure and working and of the division of human capital between education and production is executed. Transitional dynamics are analyzed for a Cobb-Douglas example and a numerical simulation is performed.JEL classification: C61, D90, O41.Acknowledgements The author would like to thank Eric C. Meyer and two anonymous referees for helpful comments. The usual caveats apply.revised version received November 23, 2003     

可再生资源约束下的内生增长模型研究

关于可持续发展,新经济增长理论主要关注耗竭性资源与环境问题对长期经济增长的影响。通过假设技术进步取决于研发投入,本文建立了一个包含可再生资源的内生增长模型,采用最优控制理论得到了模型的稳态增长解,并得出结论:可持续增长不能单方面强调技术进步,对可再生资源的合理利用也是实现可持续增长的有效途径。     

经济增长模型中的储蓄率内生化问题

本文讨论经济增长模型中储蓄率内生化的各种问题,包括有限寿命与无限寿命、确定寿命与不确定寿命、不确定寿命下的消费决策方法、不确定寿命下非预料死亡者的遗产如何处理、个人生命如何分期、个人如何预期未来收入等。强调了寿命假定与人口年龄结构的内在联系,提出了寿命不确定下个人消费决策的新方法,探讨了有关未来收入的趋势预期和水平预期,并分析了哪一种更接近实际。     

A Two-Sector Model of Endogenous Growth with Leisure

This paper analyses the equilibrium dynamics of an endogenous growth model with physical and human capital in which leisure enters the utility function. The inclusion of leisure introduces a potential source of non-convexities in our optimization problem and leads to the possible existence of multiple balanced growth paths. This multiplicity of optimal stationary solutions is linked to the assumption that education has no effect on the quality of leisure, and hence a relatively more educated economy may choose to grow faster, and devote more time to income-directed activities. To characterize the set of optimal solutions in our non-concave optimization framework we develop a new method of analysis that should be of interest in related applications.     

Dynamic Analysis of an Endogenous Growth Model with Investment‐specific Technological Change

This paper examines a dynamically optimal subsidy policy in a continuous‐time version of the endogenous growth model developed by Krusell (Krusell, P. (1998) “Investment‐Specific R&D and the Decline in the Relative Price of Capital”, Journal of Economic Growth, vol. 3, no. 2, pp. 131–141), in which investment‐specific technological progress occurs endogenously because of R&D performed by monopolistic firms. It is demonstrated that a combination of the time‐invariant subsidy for investment and the time‐variant subsidy for R&D enables the market equilibrium to replicate the socially optimal allocation.     

新古典增长和内生经济增长中的金融发展效应

本文分别建立了引入金融部门的新古典增长模型和内生经济增长模型,并对金融发展的增长效应和水平效应进行比较分析.文章首先,在新古典增长模型中分析了金融发展的水平效应和增长效应.其次,分别在资本外溢、技术创新和人力资本积累等代表性内生经济增长模型中,探讨了金融发展的增长效应和水平效应.最后,概括总结全文观点.本文认为,在新古典增长模型中,金融发展只有水平效应,而无增长效应,在内生经济增长模型中,金融发展既有水平效应又有增长效应.     

中国金融体系选择与经济增长关系的比较研究--文献评述与一个简单内生增长模型的分析

本文对银行主导型金融体系与市场主导型金融体系促进经济增长优劣进行比较的实证文献进行综述,总结出四种观点及理论支持.基于内生增长模型对银行主导金融体系与市场主导金融体系对经济增长的促进作用进行比较分析,得出的结论是两种金融体系在促进经济增长上没有明显的优劣之分,但银行主导型金融体系在某些方面存在优势,因而作者认为目前中国银行主导型金融体系在促进经济增长上是有效的,强行将中介主导型金融体系转变为市场主导型金融体系的政策可能是误导的.     

Diverging Populations and Endogenous Growth in a Model of Meaningless Trade

The endogenous growth literature raises the possibility that countries may grow without bound in terms of per capita income, and that they may do so at different rates. This possibility also exists in neoclassical growth models with diverging populations—populations that grow at different rates. In both cases, however, this means that international inequality of per capita incomes will not only exist but also get worse over time. This paper examines that possibility within a very simple one-sector model that allows for both diverging populations and endogenous growth.     

A Closed-form Solution of the Uzawa-Lucas Model of Endogenous Growth

This paper presents a closed-form solution to the Uzawa-Lucas endogenous growth model with human and physical capital. Our result also applies if an external effect in the use of human capital in goods production occurs. Using the ``guess-and-verify' method, we determine the two value functions of the social planner in the centralized economy and of the representative agent in the decentralized case. We show that the introduction of income taxes on wages and of a subsidy on physical capital earnings helps the decentralized economy in reaching the social optimum, while keeping the policy maker's budget balanced. Finally, we derive the time-series implications of the model's solution.     

财政分权框架下的财政政策和货币政策

本文扩展了Barro( 1 990 )和Gong和Zou( 2 0 0 2 )的模型 ,讨论财政分权框架下的政府财政政策和货币政策 ,通过消费者行为、地方政府行为和中央政府行为之间Nash均衡解 ,得到了经济增长率和各参数的隐式关系 ,并且通过数值模拟得到经济增长率与各种税收以及政府间转移支付的关系。我们发现经济增长率和收入税的关系是Laffer曲线 ,消费税对经济增长的影响是正的 ,财产税对经济增长的影响是负的。至于货币政策的影响 ,我们发现货币不再是超中性的了 ,供应量增加可以促进经济增长 ,而且经济中的货币的流通程度越高 ,经济增长率越高。最后 ,本文还讨论了多级地方政府的情况 ,分析了不同税收制度的地区对整个经济增长的不同影响。     

Endogenous vs. Semi-endogenous Growth in a Two-R&D-Sector Model

This paper contributes to the endogenous versus semi-endogenous growth debate by establishing that semi-endogenous growth is more general than endogenous growth in a two-R&D-sector growth model. It is demonstrated that endogenous growth requires two 'knife-edge' conditions of parameters. This finding (i) is in sharp contrast to recent two-R&D-sector models that show that long-run growth is endogenous, and (ii) resurrects the policy conclusion of semi-endogenous growth that government policy is not effective in raising the underlying growth rate of an economy. The driving force of these results is knowledge spillovers between two R&D activities, which are largely neglected in existing studies.     

Endogenous Growth and Equilibrium Unemployment in a North–South Model

A North–South model is developed which incorporates an endogenous rate of equilibrium unemployment in the North in the context of long-run growth. It is shown how increases in the size of public debt and unemployment compensation financed by payroll taxation, all measured relative to productivity, raise the Northern natural rate of unemployment and, consequently, reduce the global rate of long-run growth. The effect of the shocks is also to drive down the rate of employment expansion in the South. A set of the fundamental determinants of the world terms of trade is obtained, which includes policy parameters.