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).

Celebrity chef adoption and implementation of social media,particularly pinterest: A diffusion of innovations approach

Pinterest research is beginning to emerge, in part due to the importance of visually stimulating photos within hospitality and tourism. Photos are popular with many chefs for marketing, with some actively using Pinterest and other social media. Some of the world’s top celebrity chefs are a growing phenomenon as influential leaders of their personal brand as well as other goods, services, and causes. This research reports on a pilot study of how celebrity chefs have adopted and implemented social media, especially Pinterest, using the Diffusion of Innovations as a theoretical framework. The study found that of the top 48 chefs, all adopted Facebook, closely followed by 47 adopting Twitter; just 17 adopted Pinterest. The chefs’ social media and Pinterest implementation varied widely. This study sheds insights about social media, particularly Pinterest, extends innovation diffusion research, and serves as a base for future research of both celebrity chefs and social media.     

开放条件下知识产权保护和社会福利效应

开放条件下知识产权保护和社会福利效应的规范研究显示,发达国家从创新主体利益角度,要求发展中国家加强知识产权保护,但这并不能保证发达国家及世界福利水平的提高;技术创新和技术扩散是知识产权保护影响福利水平的两个最重要传导机制,其对南方国家知识产权保护的反应也存在不确定性。一些实证研究显示,知识产权保护对经济增长、国际贸易、FDI和技术转让均有影响。从减少贫困和失业以及产业结构变迁等发展经济学视角展开研究,是对现有文献的一个重要拓展方向。     

Art of the possible or fool's errand? Diffusion of large-scale management innovation

Organizations are continually challenged to increase efficiency and improve performance despite frequent cuts to personnel and budgets. These challenges force organizations to identify, develop, and diffuse various management innovations. Diffusion efforts are often met by resistance, reluctance, or ambivalence, resulting in what many consider to be a fool's errand. While management innovation may not be the forte of large, bureaucratic organizations, we present a case study of a U.S. Air Force maintenance, repair, and overhaul organization that has recently, and successfully, diffused a large-scale management innovation. Results from the case study support the development of a diffusion of innovation framework that identifies important mechanisms associated with the acceptance, routinization, and assimilation of management innovation. The framework informs leaders of the diffusion process, while the recommended actions of relentless leadership, deliberate development of personnel, and enterprise involvement drive diffusion efforts and help leaders achieve desired results in innovation diffusion and associated performance improvement. Overall, we assert that the pursuit of management innovation is not necessarily beyond the art of the possible for business leaders.     

城市科技创新人才政策扩散动力因素时空差异研究

科技创新人才是城市提升创新能力的核心资源,是科技进步的关键要素。科技创新人才政策作为城市争夺人才的工具,被各个城市广泛采纳和使用。以161个城市为研究对象,运用事件史分析方法,探寻城市科技创新人才政策扩散的动力因素并进行时空差异分析。研究发现,城市科技创新人才政策扩散具有双重动力因素：在需求拉动因素中,经济发展水平和财政收入是影响城市科技创新人才政策扩散的主要因素;在压力推动因素中,行政指令、府际竞争和社会舆论显著影响城市科技创新人才政策扩散;在政策扩散平稳增长期,双重动力因素共同作用于政策扩散过程,而在政策扩散加速和减速增长期,城市科技创新人才政策扩散动力因素存在差异;在东、中部地区,压力推动因素占据主导,而在西部地区,双重动力因素都发挥重要作用。     

Forecasting the diffusion of photovoltaic systems in southern Europe : A learning curve approach

Most analysts disagree upon whether photovoltaic systems (PV) will be able to play an important role in the energy scenarios of the future. A few scholars also question the appropriateness of policies that envisage the use of public subsidies to stimulate the growth of this industry and to accelerate market penetration. This paper contributes to this debate by examining whether carefully designed policies may initiate a process of large-scale diffusion of grid-connected PV, even without the deployment of external subsidies. Building upon a disaggregated characterization of the electricity market, it takes endogenously into account the learning curve phenomenon and simulates the diffusion of PV building-integrated systems in five European countries. The analysis is restricted to crystalline silicon systems and is repeated under four different macroeconomic scenarios corresponding to four different energy policies. The results suggest that already today there are opportunities for PV diffusion in many islands of the Mediterranean region, which may trigger sufficient scale economies to render the technology competitive in larger markets. They also show that the diffusion process could be accelerated through the implementation of carbon-tax policies that support initial penetration. The environmental benefits (net avoided CO₂ emissions over the system life cycle) associated with the forecasted penetration are also evaluated.     

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.