引入效用分析的网络金融创新产品扩散模型的实证研究

近年来,网络金融创新产品在现代经济领域的重要性日趋提高,通过对各种网络金融产品在各国及各地区市场扩散过程的研究,发现其扩散的动态过程是存在一定规律的.本文在将生物种群模型引入网络金融创新产品扩散的基本模型的基础上将效用引入扩散过程的分析中,从而更准确地判断饱和点的产生,并针对中国台湾信用卡数据和中国内地银行卡进行了实证研究,模型的研究可以为金融机构的战略决策以及管理部门的产业政策制定提供理论参考.     

我国智慧城市创新扩散演进机理及启示

基于政策创新扩散理论,从城市内外两方面构建智慧城市扩散影响模型,运用事件史分析方法对38个城市数据进行分析。研究发现：在城市内部因素中,城市规模、人口密度和人均收入未对智慧城市扩散产生显著影响,城市性质和经济实力对智慧城市扩散产生显著正向影响;在城市外部因素中,城市间政府竞争和府际学习是智慧城市扩散发生的关键因素,但上级压力假设未获得支持。     

国防科技研发政策与军民技术相互扩散研究

近10年来,国际上军事与民用技术研发投入呈现新的趋势,军民两用技术相互扩散、转移的特征和方向也随之发生了变化。对国际上主要发达国家和我国军民两用技术相互扩散、转移的特点和规律进行比较和分析,为我国加强军民两用技术R&D合作及制定相关政策提供借鉴和理论支持,以达到有效利用有限的国防预算发展经济的目标。     

结合新产品扩散特征的实物期权定价模型研究

现有实物期权定价模型未能考虑新产品销售量所呈现的扩散特征,模型的分析结果与实际情况有较大差距。文章假设新产品价格服从几何布朗运动,并以Bass模型预测新产品的销售过程,运用二叉树方法,构建了离散时间状态下结合新产品扩散特征的实物期权定价模型,并得到新技术采用的最优时机。     

2009年中国经济增长率周期波动呈U型走势——利用景气指数和Probit模型的分析和预测

本文基于景气指数、"宏观经济监测预警信号系统"及Probit模型方法,对当前的经济景气状况和走势进行了分析和预测.结果表明:先行合成指数和先行扩散指数同时在2008年10月出现谷底,预示着本轮经济周期波动的谷将出现在2009年的4月或5月.在全球金融危机的背景下,中国经济仍会保持"一枝独秀",2009年下半年我国将处于经济周期波动的上升阶段.但是我国外需仍然不振,保增长将主要靠内需,经济增长周期波动的回升将呈现U型走势.     

Market Structure And The Adoption Of Innovations: The Case Of The Spanish Banking Sector ‡

This paper is an empirical study of the determinants of adoption time for the teleprocess terminal by Spanish commercial and savings banks. The explanatory variables include the characteristics of the adopting firms, size, and in the case of the savings banks, the structure of the market and concentration. The results indicate that the speed of adoption is maximized at intermediate levels of size and market concentration, confirming one theoretical prediction of models of diffusion: namely, that adoption time is minimized at intermediate levels of market concentration.     

The deployment and penetration of high-speed fiber networks and services: Why are EU member states lagging behind?

One of the most controversial regulatory issues in Europe (and elsewhere) is whether the emerging next-generation access (NGA) infrastructure should be subjected to cost-based access regulation or whether at least a temporary removal of ex ante obligations (“regulatory holidays”) should be granted. Likewise, the role of NGA-specific state aid policies is increasingly capturing the attention of policy makers and the academic literature.     

全球化对城市空间结构的作用机制分析

论文认为城市空间结构的演进归根结底是微观经济主体,尤其是企业的生产行为和区位选择行为推动的。企业对生产组织和空间布局的不同选择,直接影响着两种不同的空间发展模式——集中化和分散化。全球化和信息化推动了生产技术方式和生产组织方式的演进,对企业区位选择、产业的空间布局,以及城市空间结构和空间组织产生了重要影响,都市圈、城市群成为当今先进生产组织方式的重要空间载体。     

A statistical equilibrium model of competitive firms

We find that the empirical density of firm profit rates, measured as returns on assets, is markedly non-Gaussian and reasonably well described by an exponential power (or Subbotin) distribution. We start from a statistical equilibrium model that leads to a stationary Subbotin density in the presence of complex interactions among competitive heterogeneous firms. To investigate the dynamics of firm profitability, we construct a diffusion process that has the Subbotin distribution as its stationary probability density. This leads to a phenomenologically inspired interpretation of variations in the shape parameter of the Subbotin distribution, which essentially measures the competitive pressure in and across industries. Our findings have profound implications both for the previous literature on the ‘persistence of profits’ as well as for understanding competition as a dynamic process. Our main formal finding is that firms' idiosyncratic efforts and the tendency for competition to equalize profit rates are two sides of the same coin, and that a ratio of these two effects ultimately determines the dispersion of the equilibrium distribution.