基于局部网络效应的创新扩散分析

在考虑局部网络效应的基础上,采用微观扩散模型仿真分析创新扩散。研究表明,局部网络效应使得创新潜在采纳个体决策相互影响,从而导致这种采纳者之间微观交互模式所呈现的宏观社会网络结构影响创新扩散的速度和程度。即使某些创新收益非常高,也有可能因为创新潜在采纳个体之间交互模式的影响而导致其扩散最终失败。同时早期创新采纳个体一般具有社会联系比较广泛,自身采纳阈值较高,自身局部网络效应强度较小,更关注创新内在价值等创新特征。     

Evaluating information diffusion speed and its determinants in social media networks during humanitarian crises

The rapid diffusion of information is critical to combat the extreme levels of uncertainty and complexity that surround disaster relief operations. As a means of gathering and sharing information, humanitarian organizations are becoming increasingly reliant on social media platforms based on the Internet. In this paper, we present a field study that examines how effectively information diffuses through social media networks embedded in these platforms. Using a large dataset from Twitter during Hurricane Sandy, we first applied Information Diffusion Theory to characterize diffusion rates. Then, we empirically examined the impact of key elements on information propagation rates on social media. Our results revealed that internal diffusion through social media networks advances at a significantly higher speed than information in these networks coming from external sources. This finding is important because it suggests that social media networks are effective at passing information along during humanitarian crises that require urgent information diffusion. Our results also indicate that dissemination rates depend on the influence of those who originate the information. Moreover, they suggest that information posted earlier during a disaster exhibits a significantly higher speed of diffusion than information that is introduced later during more eventful stages in the disaster. This is because, over time, participation in the diffusion of information declines as more and more communications compete for attention among users.     

Licensing and innovation with imperfect contract enforcement

Licensing promotes technology transfer and innovation, but enforcement of licensing contracts is often imperfect. We model contract enforcement as a game with perfect information but probabilistic enforcement and explore the implications of weak enforcement on the design of licensing contracts, the conduct of firms, and market performance. An upstream firm develops a technology that it can license to downstream firms using a fixed fee and a per‐unit royalty. Strictly positive per‐unit royalties maximize the licensor's profit if competition among licensees limits joint profits. With imperfect enforcement, the licensor lowers variable royalties to avoid cheating. Although imperfect contract enforcement reduces the profits of the licensor, weak enforcement lowers prices, increases downstream innovation, and in some circumstances can increase total economic welfare.     

Adverse selection and costly information acquisition in asset markets

We develop an asset exchange model with adverse selection and costly information acquisition incentives. A seller of an asset knows the true value of the asset, while a buyer can obtain information about the asset’s quality at a cost. An equilibrium offer is pooling, but a buyer can purchase only good assets after producing the costly information about the asset’s quality. When the probability that the seller holds good assets is above the threshold value, a trade can occur with and without information acquisition, depending on the information acquisition cost, and the trade volume and social welfare are higher in equilibrium without information production than in equilibrium with information production. When the probability of facing good assets is below the threshold value, a trade occurs only after screening the quality of assets, and, hence, the market collapses if the information acquisition cost is sufficiently high. As the information acquisition cost increases, social welfare can increase or decrease depending on the probability of facing good and bad assets.     

中小企业技术创新的市场激励——基于江苏省264家企业的实证分析

技术创新是推动中小企业发展的关键因素。中小企业技术水平呈不断提高态势,但总体而言其技术创新能力仍然较低。对江苏省264家企业的问卷分析表明,市场激励不足是中小企业技术创新能力较低的根本原因。如果市场体系和市场机制不完善,不正当竞争行为得不到制止,技术创新的权益得不到保护,企业就不愿花力气进行技术创新。因而,只有建立完善的市场体系,健全市场激励机制,中小企业技术创新才能获得最大化的激励动力。     

Frankfurt Artificial Stock Market: a microscopic stock market model with heterogeneous interacting agents in small-world communication networks

We study the relationship between communication network topologies, namely the small-world networks introduced by Watts and Strogatz, and the simulation results of an artificial stock market, here the Frankfurt Artificial Stock Market. Heterogeneous interacting agents communicate their success and trading strategy to their nearest neighbors. A process of information diffusion arises through the adaptive behavior of agents when encountering more successful strategies in their direct neighborhood. We will show that an increasing rewiring probability of the small-world network will lead to higher volatility and distortion within our simulation model. It seems probable that the spatial position of traders within a communication network affects the price building process.     

Improving SME competitiveness reinforcing interorganisational networks in industrial clusters

Drawing on a social network approach this paper proposes a methodology that helps with the empowerment and development of interorganisational networks in clusters. Paper emphasises the necessity of establishing relationships with other firms and external agents in order to empower the creation and diffusion of knowledge, through factors such as innovation. The aim of the proposed methodology is to know how required knowledge should be located and diffused to identify the opportunities motivating the creation of particular interorganisational networks. Similarly, it is also important to know how to determine which agents might to take advantage of these opportunities creating networks.     

The impact of opportunity connectedness on innovation in SMEs’ foreign-market relationships

Small and medium-sized enterprises (SMEs) use of business networks has grown significantly during the last decades, partly due to increasingly complex innovation processes. This article investigates how different kinds of networks, depending on location, contextualize innovation in specific foreign market business relationships. Building on internationalization, network, and innovation research we develop a model that views opportunity connectedness in specific host-markets, home-markets, and other international markets as prerequisites to innovative collaboration and innovation outcomes in foreign business relationships. The results of our linear structural relations (LISREL) analysis of Swedish SMEs provide empirical evidence that the effect of opportunity connectedness on innovation outcomes in foreign business relationships is mediated by the level of innovative collaboration. These results indicate that SMEs need a relatively higher level of innovative collaboration in their partnerships with foreign market customers to convert opportunities conceived in home- and international- market networks into innovative outcomes in comparison to opportunities conceived in host-market networks. This finding implies that as opportunities become increasingly contextually remote, the importance of collaborative business relationships increases. By showing these results, the study contributes to research in the international small-business domain that seeks to identify important prerequisites of SME innovation.     

Determinants of performance of independent financial advisors

This paper examines the performance of independent financial advisors (IFAs) in terms of their involvement in innovation activities, participation in business networks and open innovation as a strategy to cope with difficult market conditions caused by the recent economic downturn. Performance is assessed on the basis of average sales growth for years 2010–2012. The results of the study suggest that IFAs’ involvement in innovation activities, participation in networks and open innovation enhances business performance. The managerial implications are that IFAs may be able to achieve higher sales growth by participating in networks and engaging in innovation activities. The originality of this paper is that it provides an empirical assessment of possible strategies to support sales growth in small financial service sector firms facing volatile market conditions.     

Social networks,employment and worker discouragement: Evidence from South Africa

Social networks are increasingly being recognized as having an important influence on labour market outcomes, since they facilitate the exchange of job related information. Access to information about job opportunities as well as perceptions about the buoyancy of the labour market depend critically on the social structures and the social networks to which labour market participants belong. In this paper, we examine the impact of information externalities generated through network membership on labour market status. Using Census data from South Africa, a country characterized by high levels of unemployment and worker discouragement, we adopt an econometric approach that aims to minimise the problems of omitted variable bias that have plagued many previous studies of the impact of social networks. Our results suggest that social networks may enhance employment probabilities by an additional 3–12%, and that failure to adequately control for omitted variables would lead to substantial over-estimates of the network co-efficient. In contrast, the impact of social networks on reducing worker discouragement is much smaller, at between 1 and 2%.     

Social Networks and Business Success

A bstract .   The main objective of this paper is to illuminate social and cultural preconditions for networking and success in business in an African context. By in-depth studies of small-scale entrepreneurs in the wood business in Tanzania, we find that people belonging to an Asian subculture probably have a better standing for entering and thriving in business, due to group cohesion, mobility, and level of education. Through high-quality social networks, characterized by a high number and variety of relations, certain groups seem to be in a better position to enact their business environment and raise entrepreneurial resources such as motivation and ideas, information, capital, and trust. To reduce social discontent and inter-ethnic and religious conflicts in this area, we suggest that policy measures be taken to enhance levels of education and access to information for all citizens to create a "level playing field" in economic affairs.     

Worker visibility and firms' retention policies

In the last two decades, the widespread use of web‐based social networks has led to a higher visibility of workers to the labor market. We theoretically and experimentally analyze the consequences of such increased labor market transparency for the efficiency of job assignments, the wages of workers, and firm profits. Our theoretical results show that higher visibility of workers increases the efficiency of job assignments, leads to a redistribution of income between workers of different ability, and increases overall surplus. Our experimental findings generally support the theoretical results with the exception that increased visibility leads to higher worker turnover such that surplus does not increase.     

The impact of stakeholder heterogeneity on risk perceptions in technological innovation

Managing risk has been widely acknowledged as a crucial managerial task in the development of new technology. More recently, the acceptance of new technologies has increasingly been influenced by secondary stakeholders, some of which are difficult to identify, or whose concerns are not easily reconciled. This paper develops a conceptual framework based on the management of technology and research & development literature, stakeholder theory, risk and social judgment to describe how traditional approaches based on reducing uncertainties through estimating probabilities may not work for social uncertainties; different heuristics are needed to understand and resolve such heterogeneous stakeholder perspectives. We contribute to the discourse by describing how risk perceptions among stakeholders vary, and how this may change over time. The framework suggests that the perception of primary stakeholder towards a specific innovation is ‘Standard’ when information is well known, but becomes riskier when information is unclear. For secondary stakeholders, when there is a low degree of imperfect information, the stakeholder relationship is an ‘Irritant’ but becomes increasingly ‘Dangerous’ when information becomes ambiguous. We conclude with implications for management and future research.     

Market Effects of Changes in Consumers' Social Responsibility

In a duopoly model of vertical differentiation, we study market equilibrium and the resulting social welfare following an increase in the consumer's willingness to pay (WTP) for products sold by socially responsible manufacturers. Different types of such changes emerge depending on their effects on consumer heterogeneity. We show that, in most cases, increases in the consumers' social consciousness yield higher profits to socially responsible firms and may lead to higher levels of social welfare, provided that the market structure is left unchanged. However, when an increase in the consumer's social consciousness changes the market structure, welfare may fall, while the duopolists' profits rise. The resulting tension between private and social interest calls for a cautious attitude toward information campaigns aimed at increasing the consumer's social consciousness.     

Enlargement and the labour market: perception,theory and fact

Favourable labour market outcomes are essential for economic and social cohesion within the newly enlarged European Union. However, Eurobarometer evidence indicates that many in the 10 incoming countries are not convinced that membership will deliver such a result. Also, there is no unambiguous theoretical framework that suggests otherwise. A more optimistic scenario can be obtained by reference to the experiences of earlier low‐income Community entrants during their first years of membership, although long‐term convergence has remained elusive.     

创业团队成员信任对社会网络与企业创新能力关系的影响

本文通过对吉林省112家有效样本企业进行调查,将社会网络细分为内部社会网络和外部社会网络,在创业团队的定义下检验了社会网络与信任对新创企业创新能力的影响。研究结果表明,内外部社会网络都会对企业创新能力产生积极影响,而团队成员之间的信任则作为调节变量影响两者之间的关系。创业团队成员之间的信任越高,越有利于知识、信息的传播与交流,内部社会网络对企业创新能力的积极影响越大;但却易产生"非我发明症"现象,导致外部社会网络对企业创新能力的积极影响越小。     

Does Competition Make Firms More Flexible? A Study of Limited Managerial Cognition

A model of procedural decision making in firms is combined with an oligopoly model to study the effect of limited managerial cognition on firm flexibility. It is argued that a firm may vary its flexibility, and, hence, that there exists a trade-off between decision-making costs and costs due to imperfect adjustment to the environment. The main conclusions are the following: (1) The level of flexibility chosen by firms tends to be too low, from a social welfare point of view. (2) Entry reduces firm flexibility. Aggregated flexibility in the market may, however, increase in which case consumers are unambiguously better off. (3) Integration of isolated markets increases firm flexibility and consumer welfare.     

Knowledge flow and inter-firm networks: The influence of network resources,spatial proximity and firm size

The objective of this paper is to analyse the characteristics and nature of the networks that firms utilize to access knowledge and facilitate innovation. The paper draws on the notion of network resources, distinguishing two types: social capital–consisting of the social relations and networks held by individuals; and network capital–consisting of the strategic and calculative relations and networks held by firms. The methodological approach consists of a quantitative analysis of data from a survey of firms operating in knowledge-intensive sectors of activity. The key findings include: social capital investment is more prevalent among firms frequently interacting with actors from within their own region; social capital investment is related to the size of firms; firm size plays a role in knowledge network patterns; and network dynamism is an important source of innovation. Overall, firms investing more in the development of their inter-firm and other external knowledge networks enjoy higher levels of innovation. It is suggested that an over-reliance on social capital forms of network resource investment may hinder the capability of firms to manage their knowledge networks. It is concluded that the link between a dynamic inter-firm network environment and innovation provides an alternative thesis to that advocating the advantage of network stability.     

The influence of co-location in higher education institutions on small firms’ perspectives of knowledge transfer

Since 1980, the UK has experienced a dramatic growth in firms and employment in information–intensive business services, such as management consultancy and market research. Recent expansion of new and small firms operating in these sectors is the focus of a major ESRC–sponsored research project currently under way at Cambridge University Small Business Research Centre.

Small business service firms are able to compete successfully with large firms due to the imperfect nature of the market which characterizes business services demand and supply, together with specialization of expertise. The success of small business service firms depends on informal person–to–person networks, word–of–mouth recommendation and repeal business based on successful earlier assignments or personal contacts acquired, for example, while working in a large consultancy or market research company. This paper examines the types of networks utilized by small business service firms and argues that two distinct types exist: demand– and supply–related networks; the former involves links with clients, the latter links and co–operation between complementary small business service firms.     

Human Resources Management Innovation

Guided by a general manager's perspective of human resources management (HRM), this paper identifies key factor affecting the introduction of HRM innovations in organizations. Because the essence of market and technological leadership is the development of the organizational capacity to carry out inventive ideas, it is critical to understand the main forces influencing HRM innovation. Following a definition of HRM innovation, six propositions are discussed using current and historical examples. Since HRM innovation also involves change in the social system of the organization, the adoption and diffusion of these innovations can be attributed not only to external environmental forces but also to social processes.