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.     

Diffusion of environmental business practices: A network approach

The purpose of this research is to build a conceptual foundation that examines network effects on the diffusion of environmental business practices (EBP) among suppliers. This research extends a network perspective to adoption of an environmental business practice across a large network of suppliers. The context of EBP is used to better understand adoption of a complex business practice, with perceived costs that are often greater than the perceived benefit. Variation in the level of structural and relationship embeddedness affect network diffusion of environmental business practices differently. Increased levels of structural and relational embeddedness are proposed to be positively associated with diffusion of EBP. From a practical standpoint, firms that leverage embeddedness may facilitate higher diffusion and adoption of environmental business practices. This facilitation may lead network actors to engage in EBP, and leverage benefits that may stem from these practices. This research introduces the concept of embeddedness to the environmental supply chain literature. Practicing managers can use the findings in this research to better position themselves within a network to diffuse EBP. This research also helps managers understand how supply chain members that are weakly connected to the primary network are important for introducing new ideas and innovations.     

Localized innovation, localized diffusion and the environment: an analysis of reductions of CO2 emissions by passenger cars

We investigate technological change with regard to CO₂ emissions by passenger cars, using a Free Disposal Hull methodology to estimate technological frontiers. We have a sample of cars available in the UK market in the period 2000–2007. Our results show that the rates of technological change (frontier movement) and diffusion (distance to frontier at the car brand level) differ substantially between segments of the car market. We conclude that successful policies should be aimed at the diffusion of best-practice technology, and take account of the different potential for further progress between different segments of the market (e.g. diesel vs. gasoline engines and small vs. large engines).

Diffusion of mobile telephony: An empirical study in Taiwan

Mobile telephony penetration is a major indicator of mobile telephony diffusion. Taiwan had a mobile telephony penetration of 108% in 2002, ranking first in the world. This study analyzes this accelerated diffusion in terms of growth model and determinants of the diffusion rate. To eliminate the inherent uncertainty associated with choosing the optimal growth model, this study compares the performance of three conventional models, namely Gompertz, Logistic and Bass, to identify the most appropriate model, and to distinguish the forces driving the diffusion rate. Empirical results indicate that the most appropriate model is the Logistic model. Network externalities, which this study shows to be the same as the imitation effect in the Bass model, explain the superiority of the Logistic model. Moreover, market competition, which markedly reduces service prices, is identified as a primary driver of the diffusion rate of mobile telephony in Taiwan. Economic conditions, technological innovation and number of operators are insignificant factors. Finally, mobile telephony is a substitute for fixed-line telephony in Taiwan.     

动态稠密人际网络中创新扩散研究

使用复杂网络模型最新成果——p-GNC网络拟合社交时代的人际网络，运用多智能体仿真法分析了p-GNC网络结构、网络效应强度和社会系统中创新先驱者比例对创新扩散的影响。研究发现，p-GNC网络的平均聚集系数越大、平均度越小，创新扩散规模越大，且平均度是创新扩散规模的决定因素。网络效应强度正向影响创新扩散规模，网络效应强度越高，p-GNC网络结构变化对创新扩散规模的影响越大。创新先驱者比例正向影响创新扩散规模，当网络效应强度较高且p-GNC网络呈现出稀疏状态时，提高创新先驱者比例对创新扩散规模的促进作用随创新先驱者比例的增加而边际递减。     

Organizational innovation: The challenge of measuring non-technical innovation in large-scale surveys

Although the implementation of innovative organizational concepts is considered to be highly important for a company's competitiveness, so far there has been little research on possible approaches to measure and monitor organizational innovations in large-scale surveys. Based on an item-oriented typology of organizational innovations which serves as the precondition for a common understanding, we describe and compare how organizational innovations have been measured through existing surveys in Europe. Using a large-scale survey comprising data of 1450 German manufacturing companies, we show how these different approaches lead to significantly different results regarding the organizational innovativeness of companies within one and the same sample. We derive four implications for the future measurement and monitoring of organizational innovations. Our findings contribute to the further development of an adequate methodology for an organizational innovation monitoring system.     

创新驱动下高新区集聚与扩散功能实现路径

集聚和扩散是创新驱动下高新区的核心功能，对于高新区可持续发展有着重要意义。首先，构建创新驱动、传导机制以及高新区功能三者关系的理论模型，由此提出研究假设；然后，运用结构方程模型并选取115个国家高新区企业作为样本进行实证研究。结果发现：①创新制度对高新区集聚功能的实现有正向影响，并且该影响通过创新型人才和金融共同发挥作用，即两者在实现路径上有完全中介效应；②创新环境正向影响高新区扩散功能的实现，且该影响主要通过创新型人才产生作用，即创新型人才在传导路径上有部分中介效应，而创新型金融的作用不明显。