Creative Destruction and Optimal Patent Life in a Variety‐Expanding Growth Model

This article presents more channels through which the optimal patent life is determined in a R&D‐based endogenous growth model with an expanding variety of consumer goods. It features an endogenous hazard rate at which patented firms' monopoly profits are “creatively destructed” by arrivals of newer varieties, among other things. A patent's effective life is, therefore, endogenized and less than its legal life. This model is calibrated to a global economy with a set of baseline parameter values. The optimal patent length is computed with the algorithm of Golden Search Section, ranging from 17 to 19 years. With the creative‐destruction hazard, the world needs a longer patent term to maximize social welfare but with the prevalence of research congestion, the world needs a shorter patent term. However, if the world's aggregate welfare appreciates varieties of goods in a way strong enough, the optimal patent term can surprisingly extend beyond 1000 years!     

Patent Protection and Strategic Delays in Technology Development: Implications for Economic Growth

We present an endogenous growth model in which both the investment to develop a new technology—that upgrades the quality of machines—and entry of imitators are determined endogenously. According to the model, how soon the new‐technology machine is launched after the patent is granted is influenced by two factors: returns to scale in technology development and “strategic delays.” Strategic delays in technology development are most likely to occur when earlier dates of success enable imitators to enter an industry, that is, when imitation is swift and relatively cheap and/or patent protection is relatively lengthy. We then explore the link between the optimal patent length and economic growth and find that the equilibrium investment in technology development and thus the expected rate of technological progress exhibit an inverted U‐shape relationship with respect to the legal patent length.     

On the trade,growth, and welfare effects of intellectual property rights protection

To examine how intellectual property rights protection affects trade, growth, and welfare, I develop a two-country R&D-based growth model in which final goods firms in both countries determine the range of imported varieties in the overall use of intermediate inputs. I show that strengthening patent protection in either country increases the range of imported varieties of intermediate goods and stimulates economic growth in the country that strengthened patent protection. Moreover, I also show that the Nash equilibrium level of patent protection is stronger than the globally optimal level of patent protection.     

Patentability and Knowledge Spillovers of Basic R&D

This study develops a research and development (R&D)–based growth model with basic and applied research to analyze the growth and welfare effects of two patent instruments: (i) the patentability of basic R&D and (ii) the division of profit between basic and applied researchers. We find that for the purpose of stimulating basic R&D and economic growth simultaneously, increasing the share of profit assigned to basic researchers is more effective than raising the patentability of basic R&D, which has either a negative effect or an inverted‐U effect on technological progress. However, a benevolent patent authority requires both patent instruments to achieve the socially optimal allocation in the decentralized economy.     

Effects of Patent Protection on Optimal Corporate Income and Consumption Taxes in an R&D‐Based Growth Model

Does reducing the corporate income tax accompanied by an increase in the consumption tax to meet the government's budget constraint improve welfare? To respond, we examine the welfare‐maximizing corporate income tax and consumption tax rates in an R&D‐based growth model under the constraint that the government's budget is balanced at each point of time. Further, we consider how welfare‐maximizing tax rates change as patent protection becomes stronger, as seen in many countries. The results show that as patent protection becomes stronger, the corporate income tax rate should be higher and the consumption tax rate should be lower. This implies that under stronger patent protection, recovering production at the expense of innovation by raising corporate income tax and reducing consumption tax improves welfare.     

Patents,R&D subsidies,and endogenous market structure in a schumpeterian economy

This study explores the different implications of patent breadth and R&D subsidies on economic growth and endogenous market structure in a Schumpeterian growth model. We find that when the number of firms is fixed in the short run, patent breadth and R&D subsidies serve to increase economic growth as in previous studies. However, when market structure adjusts endogenously in the long run, R&D subsidies increase economic growth but decrease the number of firms, whereas patent breadth expands the number of firms but reduces economic growth. Therefore, in accordance with empirical evidence, R&D subsidy is perhaps a more suitable policy instrument than patent breadth for the purpose of stimulating long‐run economic growth.     

商业方法专利保护及其对中资银行的影响

商业方法专利是国家赋予权利主体对某种商业运作方式或模式的独占权。商业方法专利是服务经济的产物。率先向服务经济转型的西方发达国家已经打开了商业方法专利保护的大门。我国还处在工业化发展阶段,实行商业方法专利保护不利于我国服务经济的发展。但是发达国家商业方法专利保护的立法趋势对中资银行造成了一定的冲击。中国政府和中资银行应采取有效措施来应对这一挑战。     

Do Patent Protection and Technology Transfer Facilitate R&D in Developed and Emerging Countries? A Semiparametric Study

This paper examines if patent protection and technology transfer facilitate R&D in a sample that includes both developed and emerging countries. A semiparametric model is used to estimate the relevant parameters using country level data from 21 countries, of which six are emerging, for the period 1981–1997. The results suggest thresholds in patent protection and technology transfer: patent protection has a positive effect which weakens at high levels of protection, and FDI has a positive effect only if the country depends heavily on FDI.

Measuring Multinationals' R&D Activities in China on the Basis of a Patent Database: Comparing European,Japanese and US Firms

Using an internationally linked patent database, this paper compares the types of R&D activities undertaken by multinationals in China by home country and industry. In China, multinationals recently began investing in R&D, mainly in the areas of product and manufacturing process development. However, US firms, which are the most actively invested in R&D, are involved in some technology‐driven R&D activities; European firms are inclined toward market‐driven R&D, while Japanese firms, which lag behind the other two, focus on production‐driven R&D. This pattern may be related to the relative competitiveness of each country: Japanese firms are strong in electronics and automobiles, where production process improvement is important, while US firms flourish in science‐based industries, such as pharmaceuticals and software, where interacting with the local science base is a critical factor.     

Pollution havens,endogenous environmental policy,and foreign direct investment

In an increasingly integrated world economy, countries may have greater incentives to weaken environmental policy as disguised protection intended to give a competitive edge to local firms. This may generate pollution havens as firms relocate in response to different environmental policies. Foreign direct investment (FDI) weakens profit‐shifting policy considerations while increasing environmental damages but, at the same time, may provide external benefits. We derive conditions under which the FDI‐recipient country has an incentive to manipulate its environmental standard to prevent or attract FDI, potentially eliminating or creating pollution havens, in addition to examining the impact of FDI on the equilibrium state of the environment.     

Cooperative fiscal policy at the zero lower bound

This paper investigates the use of fiscal policy in response to a large negative aggregate demand shock which may push the global economy into a liquidity trap. Fiscal policy may be an effective tool to respond to a liquidity trap, but its international spillover effects may operate quite differently from its domestic effects. We derive the optimal cooperative fiscal response to a global liquidity trap in a two country world economy. Surprisingly, we find that the optimal fiscal spending response for a partner country to a negative aggregate demand shock in a source country may be negative. If fiscal policy can be chosen under policy commitment, the optimal response involves current fiscal expansion combined with future fiscal contraction, after the liquidity trap has ended.     

论传统知识的法律保护模式构建——兼论2008年《专利法》新增关于遗传资源的规定

我国的传统知识在内涵和形态上有着不可比拟的丰富性,但随着经济全球化趋势和现代化进程的加快,传统知识及其生存环境受到严重威胁。由于过度开发和不合理利用及人们生活环境和条件的变迁,许多重要传统知识正面临消亡或失传。因此,探讨传统知识法律保护模式的构建问题,对保护我国的传统知识具有十分重要的意义。     

Trade Flows,Exchange Rate Uncertainty,and Financial Depth: Evidence from 28 Emerging Countries

This article investigates the effects of real exchange rate uncertainty on manufactures exports from 28 emerging economies, representing 82% of all developing country manufactures exports, and explores the sources of heterogeneity in the uncertainty effects by controlling for the direction of trade (south‐north or south‐south), and the level of financial development of the exporting country. The empirical results show that for more than half of the countries, the uncertainty effect is unidirectional, either south‐south or south‐north, and the median impact is negative. In addition, while we find that financial development augments trade, exchange rate shocks can negate this effect. Last but not least, trade among developing economies improves export growth under exchange rate shocks.     

The Future is in the Past: Projecting and Plotting the Potential Rate of Growth and Trajectory of the Structural Change of the Chinese Economy for the Next 20 Years

Based on the convergence hypothesis and referring to the experience of East Asian high‐performing economies from 1950 to 2010, this paper projects and plots the potential growth rate of the Chinese economy over the next 20 years. It predicts that the potential growth rate of per capita GDP adjusted by purchasing power parity averages at 6.02 percent from 2015 to 2035, while the potential GDP growth rate of 2015 would still be above 8 percent, which implies that the realized rate of growth has not reached its potential since 2012. Besides, based on the per capita GDP projected and on cross‐country comparison, the paper plots the trajectory of structural change of the Chinese economy from 2015 to 2035. The result shows that: (i) the value‐added share of primary industry will drop more rapidly than the employment share; (ii) the value‐added share of secondary industry will decline and employment share will present an inverted U shape whose turning point will probably come between 2020 and 2025; (iii) both the value‐added and employment share of tertiary industry will increase continuously.     

Creeping Tiger, Soaring Dragon： India, China and Competition in Information Technologies

Although conventional international economic wisdom holds China's hardware and India's software industries to be equipotential, little attempt has been made to compare their information industries in an overarching dynamic framework. Using a schema that links intellectual to financial value creation, it is found that China has systematically moved ahead in creating a self‐supporting industrial and innovation ecosystem. Hardware enjoys higher barriers to entry, which the Chinese companies are increasingly reinforcing with intellectual property investments. In addition to being better integrated with the global economy, they are also buttressed by the huge domestic market. The overdependence of Indian firms on selling low‐value services to a few countries and insulation from domestic demand make them vulnerable to emerging competition and international economic ill‐winds. The two countries provide a study in contrast on the effects of divergent industrial strategies.     

The Role of Agriculture on the Recent Brazilian Economic Growth: How Agriculture Competes for Resources

Drawing upon the Global Trade Analysis Project (GTAP) database, and other time series data, we construct a multi‐sector Ramsey model that shows the transition growth of the Brazilian agricultural sector and its effects on growth of the industrial and service sector of the economy, with particular emphasis given to the years 1994–2010. Our results capture the importance of the agriculture's capital intensity and the sector's factor productivity on the sector's growth, the substitution of capital for labor in agriculture, and the sustaining of agriculture's share in Brazilian GDP. These features are rather unique among emerging economies, most of which have experienced a transition out of agriculture and growth in nonfarm production relative to agriculture.     

Entry and the accumulation of capital: A two state variable extension to the Ramsey model

In this paper we consider the entry and exit of firms in a dynamic general equilibrium model with capital. At the firm level, there is a fixed cost combined with increasing marginal cost, which gives a standard U‐shaped cost curve with optimal firm size. Entry is determined by a free entry condition such that the cost of entry is equal to the present value of incumbent firms. The cost of entry (exit) depends on the flow of entry (exit). Equilibrium is saddle‐point stable and the stable manifold is two‐dimensional. Transitional dynamics can, under certain circumstances, be non‐monotonic.     

Optimal government spending in an economy with imperfectly competitive goods and labor markets

This article examines the growth‐ and welfare‐maximizing government spending in an economy that is characterized by market imperfections, namely, unionization in the labor market and monopolistic competition in the goods market. To thoughtfully explore the optimal spending, two distinct scenarios where the government spending is financed by labor/capital income taxes are considered. Our analysis shows that the optimal growth‐maximizing government spending is inconsistent with the welfare‐maximizing government spending. Moreover, the growth‐maximizing/welfare‐maximizing government spending have quite different responses to distinctive market imperfections (markups in the goods and labor markets), particularly in the scenarios with distinctive financing modes. Our numerical study indicates that the growth‐maximizing and welfare‐maximizing government expenditures, in general, are more responsive to the change in the labor market friction than that in the product market friction and the growth‐maximizing government spending is more likely to be lower than the welfare‐maximizing government spending.     

Remedy or Poison: Impacts of China's Outward Direct Investment on Its Exports

During the past decade, China's outward direct investment (ODI) and exports have experienced rapid growth, drawing increasing attention to the relationship between them. Using the gravity model based on panel data on China's ODI and trade to 174 countries and regions during 2003–2012, the present paper investigates the impacts of China's ODI on exports. We find that China's ODI to a host country significantly promotes China's trade with that economy: a 10‐percent increase in ODI stock can lead to a 2.14‐percent increase in exports, a 2.07‐percent increase in imports and a 2.87‐percent increase in net exports. The scale of the host country's economy, its infrastructure and its distance to China also have significant impacts on China's exports. Therefore, growth in ODI will facilitate China's trade and integration into the global economy, and enhance industrial upgrading in China by transferring the low‐end industries abroad.     

专利视域下青岛市战略性新兴产业发展现状及对策

基于incoPat专利平台，对2011-2021年青岛市战略性新兴产业发明专利开展统计分析，从专利申请授权趋势和生命周期等揭示了青岛市战略性新兴产业发展现状，并对授权发明专利从公开趋势、有效性、申请人、技术领域、区市分布以及转让许可等多维度开展深入分析。结果表明，近10年来青岛市战略性新兴产业专利发展态势持续向好，但专利海外布局意识有待加强；生物、新材料和节能环保产业的专利申请量最多，但研发能力和创新质量有待提升；驻青高校及科研院所在青岛市战略性新兴产业创新发展及成果转化中发挥了重要作用；崂山、黄岛和市南三区的专利创新活动最为活跃，但产业侧重各有不同，而青岛市区市间、产业间专利创新活动仍存在发展不均衡现象。