Demographic processes in a model of innovation diffusion with dynamic market

In this paper we study a binomial innovation diffusion model for a variable size market by modelling the demographic process of entrance-exit from each market compartment. We examine from a theoretical point of view the effect of the simultaneous presence of economic and demographic parameters under the exponential market growth hypothesis, by presenting some general results on the adoptions and sales time path. We also enlighten the relevance of considering these variables in relative terms and show how, in presence of a dynamic, the diffusion process never saturates the market. Finally, we test our model on a data set for cellular phones market in different countries.     

金融危机下的贸易保护问题研究——基于母市场效应的分析

母市场效应是指在规模报酬递增和贸易成本存在的情况下,一个国家会倾向于出口迎合本国需求的产品,需求大国将最终成为该产品的净出口国。从分析历次金融危机爆发时各国的贸易保护措施入手,依据母市场效应的理论框架,探讨了金融危机下的贸易保护问题并对其进行实证检验,最后得出金融危机期间采取贸易保护措施确实能促进出口的结论。     

Evidence of a stock market wealth effect using household level data

Using the household level data of urban households in Korea, this paper presents evidence for a statistically significant stock market wealth effect for the highest income bracket households who typically hold a large share of corporate stock.     

市场一体化、非对称性贸易成本与制造业集聚*

国内市场一体化将会对中国制造业的空间分布造成何种影响？本文通过构建统一的理论分析框架验证了国内市场一体化影响制造业集聚的两种机制：其一是贸易成本总体水平的调节效应,其二是贸易成本非对称性的直接效应,而调节效应的方向则取决于模型理论范式选择。此外,本文基于中国区域间投入产出数据,系统地测算了中国地区间的非对称双边贸易成本,并基于测算结果进行回归分析。实证结果表明,在中国制造业发展初期,市场结构总体符合IRS MC范式设定,此时贸易成本的调节效应倾向于促进制造业在东部沿海区域集聚。伴随着制造业生产技术的成熟,制造业市场结构开始呈现CRS PC范式特征,此时市场一体化对制造业集聚的调节效应不再显著。     

Multiple equilibrium overnight rates in a dynamic interbank market game

We analyse a two-period model of the interbank market, i.e. the market where banks trade liquidity. We assume that banks do not take the interbank interest rate as given, but instead negotiate on interest rates and transaction volumes with each other. The solution concept applied is the Shapley value. We show that there are a multiplicity of average equilibrium interest rates of the first period so that the average interest rate in this period does not convey any information on the expected liquidity situation on the interbank market. As the banks control not only the transaction volumes, but also the interest rates, they can leave the interest rates constant and adjust the transaction volumes when, for example, a liquidity deficit becomes more likely.     

重庆市外贸竞争力的现状分析与对策建议

近年来,重庆市的经济外向度有所提高,但外资参与度低、出口产品在国际市场上的竞争力较弱的状况依然存在.重庆市是长江上游和我国西部地区的中心城市.在我国加入世贸组织、国内国际市场无缝连接进程不断加快的今天,重庆市要加快发展,就必须融入全球化进程,在开放经济中求发展,提高自身的外贸竞争力.     

Technological forecasting at the Korean stock market: A dynamic competition analysis using Lotka–Volterra model

The purpose of this paper is to attempt to analyze the dynamic relationship between the Korean Stock Exchange (KSE) and Korean Securities Dealers Automated Quotation (KOSDAQ), two competing markets at the Korean stock market, in the viewpoint of technological forecasting of competition. The Lotka–Volterra system of equations, one well-known competitive diffusion models, is adopted to represent the competitive situations of the Korean stock market and it is estimated using daily empirical index data of KSE and KOSDAQ during 1997–2001. The results show that there existed a predator–prey relationships between two markets in which KSE acted as a prey for the time being after the emergence of KOSDAQ. This interaction was altered to symbiotic relationship and finally to pure competition relationship. We also perform an equilibrium analysis of the estimated Lotka–Volterra equations. As a result, we find that there is an equilibrium point in a dynamic sense. However, the equilibrium point could be unstable in the latest pure competition relationship.     

The evolution of stock market efficiency in the US: a non-Bayesian time-varying model approach

A non-Bayesian time-varying model is developed by introducing the concept of the degree of market efficiency that varies over time. This model may be seen as a reflection of the idea that continuous technological progress alters the trading environment over time. With new methodologies and a new measure of the degree of market efficiency, we examine whether the US stock market evolves over time. In particular, a time-varying autoregressive (TV-AR) model is employed. Our main findings are: (i) the US stock market has evolved over time and the degree of market efficiency has cyclical fluctuations with a considerably long periodicity, from 30 to 40 years; and (ii) the US stock market has been efficient with the exception of four times in our sample period: during the long recession of 1873–1879; the recession of 1902–1904; the New Deal era; and the recession of 1957–1958 and soon after it. It is then shown that our results are partly consistent with the view of behavioural finance.     

R&D subsidies in a model of growth with dynamic market structure

This paper presents the effects of an R&D subsidy in a Schumpeterian general equilibrium model with rich industry dynamics. R&D subsidies raise the long-run growth rate, but they also raise the level of industry concentration. In the model firms compete for market share through process R&D endogenously determining the market structure within and across industries. Endogeneity of the market structure allows for analysis of changes in the moments of the firm size distribution in response to policy. R&D subsidies primarily benefit large incumbent firms who increase their innovation rates creating a greater technological barrier to entry. Concentration increases with fewer firms and a higher variance in the market shares. In general equilibrium, the greater distortions in the product market cause the wage rate to fall which leads to increased turnover rates. In addition, the analysis demonstrates that the model captures a large number of empirical regularities described in the industrial organization literature, but absent from most endogenous growth models. These features, such as entering firms are small relative to incumbents, the hazard rate of exit is negatively related to firm size, and large firms spend more on R&D than small firms play important roles in understanding the impact of R&D subsidies on the economy.     

Proof of global stability,transitional dynamics,and international capital flows in a two-country model of innovation and growth

Global stability properties of dynamic two-country models can be easily studied in the case of perfect international capital flows. With internationally constant relative productivities, balanced-growth path values for factor prices will hold on any path leading to the balanced-growth path unless one country experiences a period of no innovation. Innovation rates converge in the case of perfect international knowledge spillovers but long-run consumption levels and trade patterns are path-dependent. GDP per capita is predicted to converge slowly despite the presence of perfect international capital markets and no explicit inclusion of adjustment costs. The trade balance of the rich country is initially positive but after some time turns into a deficit.     

中国对外贸易本地市场效应及其假设前提的验证

利用计量模型对中国与32个伙伴国或地区对外贸易中的本地市场效应进行研究,结果发现：在所有商品和细分类别商品的双边贸易中并不存在统一的本地市场效应模式;一些重要贸易伙伴国与中国双边贸易中的本地市场效应现象并不突出。通过对贸易成本、规模经济程度和产品差异化程度对本地市场效应影响进行验证,验证结果表明：三者对总体贸易的本地市场效应没有显著影响;贸易成本和产品差异化程度分别对2类和7类商品对外贸易中的本地市场效应有显著影响。     

Inequalities and fluctuations in a dynamic general equilibrium model

   Summary. In the present paper a tractable two-sector neo-classical growth model with heterogeneous agents is considered. The local dynamic properties of the equilibrium path are analyzed in relation with the underlying characteristics of the economy. In particular, the existence of fluctuations is related to the degree of heterogeneity in labor and in capital endowments. When applied to international trade theory, the analysis shows that free trade may distabilize a world economy that is originally stable under the regime of autarky. Received: December 28, 1998; revised version: October 29, 1999     

Labor market institutions and aggregate fluctuations in a search and matching model

This paper explores the influence of labor market institutions on aggregate fluctuations. It uses a dynamic, stochastic, general equilibrium model characterized by search and matching frictions in the labor market and nominal rigidities in the goods market. It finds that firing costs and unemployment benefits can have substantial effects on aggregate fluctuations. Increasing firing costs decreases the volatility of output, employment, and job flows due to the reduction in the mass of jobs sensitive to disturbances and lower incentives for firms to hire and fire workers. Hence, firms adjust to shocks mainly through prices, causing inflation to become more volatile. Raising unemployment benefits has the reverse effect on aggregate fluctuations.     

Skilled and unskilled wage dynamics in Italy in the 1990s: changes in individual characteristics,institutions, trade and technology

In this paper, we use individual micro data on workers combined with industry and regional data to study the wage dynamics of skilled and unskilled workers in Italy in the 1991–1998 period. In contrast to previous empirical studies, our data make it possible to analyse, within a single framework, the role of many of the factors indicated in the literature as possible determinants of skilled and unskilled wage dynamics: changes in the individual characteristics of workers, changes in labour market institutions, increasing international integration, and skill‐biased technological progress. Our results show that international integration, both in terms of trade in goods and in terms of international labour mobility, plays a role in determining the wage dynamics of skilled (white‐collar) and unskilled (blue‐collar) workers. Moreover, in line with labour economics research, our findings show that the individual characteristics of workers and the institutional variables are more relevant in explaining skilled and unskilled wage dynamics than wage differentials.     

A model of local labor market reguiation of Chin in the transition period

With the establishment of labor market of China,market is playing a more and more important role in allocation of human resources.However,with the transition of economy in China and industrial upgrading in recent years,many labor problems have occurred which do harm to the sustainable development of local economy.The paper researches on the labor market issues of China from the perspective of local labor market regulation,Firstly,reviews the theories of local labor market regulation.And then the main components of local labor market regulation of China are identified and the evaluation index system is established,The results of analysis of the calculated output show that (1) the local labor market regulation of China has an obvious character of gradient distribution geographically and decreases gradually from east to west;(2) of all the regulations,the regulation of the development of human capital has the most significant impact on local economy currently which is followed by the regulation of laborrelation and the regulation of market participation.As to the regulation of social security,it has no significant impact on the development of local economy.     

绿色壁垒对绍兴外贸出口的影响及政策建议

当前，绿色贸易壁垒在全球经济中运用得越来越广泛，对出口造成了巨大影响。本文通过对绿色壁垒绍兴外贸出口贸易方向和出口结构影响的分析，提出一些政策建议。     

Termination of dynamic contracts in an equilibrium labor market model

In an equilibrium model of the labor market, workers and firms enter into dynamic contracts that can potentially last forever, but are subject to optimal terminations. Upon termination, the firm hires a new worker, and the worker who is terminated receives a termination contract from the firm and is then free to go back to the labor market to seek new employment opportunities and enter into new dynamic contracts. The model permits only two types of equilibrium terminations that resemble, respectively, the two kinds of labor market separations that are typically observed in practice: involuntary layoffs and voluntary retirements. The model allows for the simultaneous determination of a large set of important labor market variables including equilibrium unemployment and labor force participation. An algorithm is formulated for computing the model's equilibria. I then simulate the model to show quantitatively that the model is consistent with a set of important stylized facts of the labor market.     

A model of local labor market regulation of China in the transition period

With the establishment of labor market of China, market is playing a more and mare important role in allocation of human resources. However, with the transition of economy in China and industrial upgrading in recent years, many labor problems have occurred which do harm to the sustainable development of local economy. The paper researches on the labor market issues of China from the perspective of local labor market regulation. Firstly, it reviews the theories of local labor market regulation. And then the main components of local labor market regulation of China are identified and the evaluation index system is established. The results of analysis of the calculated output show that （1） the local labor market regulation of China has an obvious character of gradient distribution geographically and decreases gradually from east to west; （2） of all the regulations, the regulation of the development of human capital has the most significant impact on local economy currently which is followed by the regulation of labor relation and the regulation of market participation. As to the regulation of social security, it has no Significant impact on the development of local economy.     

我国复杂技术产业的市场追赶态势研究:国际贸易视角

从国际贸易的视角来探讨我国复杂技术产业的市场追赶态势。研究发现:我国复杂技术产业的市场追赶绩效明显,就产品和工艺都复杂的产品而言,我国出口额占全世界出口额的比例从2000年的2.41%快速上升到2008年的10.96%,产品和工艺都复杂的产品的出口额占我国出口总额的比例从2000年的46.43%上升到2008年的72.35%;从中、美、德、日、韩五国的比较结果来看,在产品和工艺都复杂的产品的出口总额中,2000—2008年间美国和日本所占份额都在下降,德国和韩国缓慢增长,我国快速增长,从第5位上升到第2位;从国际贸易平衡来看,在产品和工艺都复杂的产品领域,2000—2008年间我国成功地从净进口国转变为净出口国,但同期日本和德国在此类产品上一直保持较高的贸易顺差,我国和日本、德国在复杂技术产业领域的贸易顺差还有较大差距。