A New Model for Information Diffusion in Heterogeneous Social Networks

This paper discusses a new model for the diffusion of information through heterogeneous social networks. In earlier models, when information was given by one actor to another the transmitter did not retain the information. The new model is an improvement on earlier ones because it allows a transmitter of information to retain that information after telling it to somebody else. Consequently, the new model allows more actors to have information during the information diffusion process. The model provides predictions of diffusion times in a given network at the global, dyadic, and individual levels. This leads to straightforward generalizations of network measures, such as closeness centrality and betweenness centrality, for research problems that focus on the efficiency of information transfer in a network. We analyze in detail how information diffusion times and centrality measures depend on a series of network measures, such as degrees and bridges. One important finding is that predictions about the time actors need to spread information in the network differ considerably between the new and old models, while the predictions about the time needed to receive information hardly differ. Finally, some cautionary remarks are made about using the model in empirical research.     

OVERSEAS MARKET INFORMATION AND FIRMS' EXPORT DECISIONS

This paper examines how firms' decision to start exporting is affected by the availability of information on export markets. Unlike existing studies that focus on information sharing among firms, we are interested in the information provided by firms' main bank. Specifically, using a unique data set containing information on both Japanese firms' export activities and the experience of their main bank (i.e., their top lender bank) in transacting with other exporting firms, we examine whether main banks act as a conduit of information on export markets. We find that information spillovers through main banks positively affect client firms' decision to start exporting (extensive margin), implying that information on foreign markets provided by banks substantially reduces the fixed entry cost of exporting. On the other hand, we do not find any evidence that information provided by banks has an effect on the export volume or on the growth rate of exports (intensive margin). Our results highlight that channels of information spillovers other than those examined in the literature so far may be of considerable importance. (JEL F10, F14, G21)     

'E-health': the internet and the transformation of patients into consumers and producers of health knowledge

This article analyses the use and production of health information on the Internet. The paper will show that users of health services have also become significant providers of health information and advice. This analysis is based on two studies. The first involved a qualitative study of households that used home computers to find health information on the Internet. The second piece of research involved the examination of home pages that contained accounts of ill health and an e-mailed questionnaire to home page authors. Drawing upon this research the consumption of health information is examined and related to how users make discussions about their health. This is followed by an analysis of the provision of health information on home pages. It is shown that these include web sites that provide simple accounts of an individual illness as well as sites that advocate a particular approach to health or offer services and products. The interweaving of personal experience with advice is considered and linked to debates about the quality of health information on the Internet and the reconfiguration of 'expertise'.     

Discovery,dissemination, and information diversity in networked groups

This paper examines the performance of networked groups on problems that require the aggregation of information from diverse sources. We present results from a behavioral experiment where groups of twenty networked participants worked on a problem that required them to pool unique information to discover a solution, and then disseminate it to others for adoption. We found that networks comprised of subgroups containing diverse information, which provided many opportunities for local synthesis of information, outperformed those comprised of homogeneous subgroups. Our findings suggest ways the configuration of a group can be altered to improve performance on a task that requires the coordinated discovery and implementation of a solution, illustrating that it is not only the total amount of information diversity in the group that matters but also its distribution within network subgroups.     

Who Can Tell? Network Diversity,Within‐Industry Networks,and Opportunities to Share Job Information

This article examines opportunities to share job information. It adds to the growing body of research on information holders and complements existing research that explains what kinds of networks and network positions provide the greatest benefit to job seekers. Data from an exploratory study of entry‐level, white‐collar workers are used to relate opportunities to share information—defined to consist of both knowledge of a job opening and awareness of a potential applicant among one's network members—with information holders’ network composition. The data show that information holders with strong within‐industry networks have more opportunities to share information and do share more information. Information holders with diverse networks more often identify potential applicants for jobs and thus have more opportunities to share information. However, despite having more opportunities to do so, they do not share information more often than those with less diverse networks. These findings, combined with the growing literature on information holders, suggest that different aspects of network composition affect the flow of job information at different stages and thus by different mechanisms.     

THIS PROTEST WILL BE TWEETED

This article examines the use of Twitter at protests surrounding the G20 meetings held in Pittsburgh, PA in September 2009. Based on work on information communication technologies and protest, and on more recent work on Twitter usage at protests, we develop several hypotheses about the content of tweets during protests. Most significantly, we argue that Twitter is a widely available mobile social networking tool that can be used to reduce information asymmetries between protesters and police. Examining the content of 30,296 tweets over a nine-day period, we find that protesters frequently used Twitter to share information, including information about protest locations, as well as the location and actions of police, which is information that was formerly monopolized by the police. Twitter use may be creating a new dynamic in protester and police interaction toward information symmetries. We conclude by identifying implications for policing practices and for protesters.     

Psychological determinants of information searching activity

The paper deals with the application of the activity theory in describing psychological determinants of the information searching activity. The notions of information behavior, information retrieval, information competence, information retrieval activity given in Russian and English scientific literature are compared. The research approach to the information retrieval activity based on the principles developed in the Russian theory of activity is described; and the fundamentals of G. Sukhodolsky's generalized conception of activity are presented for the first time. Analysis of empirical researches showed that specific features of information search depend on how the user evaluates information resources, information, conditions and results of search. Psychological determiners of information search may be detected as the system of evaluative alternatives, which is generated by the user during the process of his experience growth. We discovered that user's evaluation system is also related to his individual typological and personal regulative features and determines the choice of the search strategy.     

Online amplification of air pollution risk perception: the moderating role of affect in information

This study investigates the amplification effect of the Internet on Chinese people’s air pollution risk perception. Analyses are based on data collected from a sample of Internet users in Beijing, Shanghai, and Guangzhou (N?=?328). This study assumes that the characteristics of online information ? availability of information and affect in information ? will significantly contribute to the increase in air pollution risk perception. Results of path analysis indicated marginal significance of the effect of information availability on air pollution risk perception. Regarding the influence of affect in information, results showed that information including appeals to affect significantly increased perceived risk of air pollution; meanwhile, it also functioned as a moderator that significantly increased the strength of the causal relationship between information availability and risk perception. Findings of this study suggest that strategies for appropriately amplifying risk perception such as using heuristics may contribute to promoting public awareness of risks as well as encouraging public participation in the social effort to tackle risks.     

The Influence of Information Costs on Donor Decision Making

This article explores whether an individual's information costs influence the information‐gathering strategies that he or she turns to prior to donating to a nonprofit. The data for the study come from a telephone survey of residents in a large county in southern California (n = 1,002). The sample was selected using random‐digit‐dialing technology and a computer‐assisted telephone interviewing system. A series of binomial logit models revealed that information costs significantly influenced the information‐gathering strategies individuals turned to in order to learn about nonprofit performance prior to making a donation. Results also revealed that greater confidence in nonprofits did not lead individuals to forgo efforts to obtain information on nonprofit performance altogether. The findings from this study suggest that it is important for nonprofit administrators to recognize, and then take into account, that not all individuals will rely on the same information sources when seeking to learn about nonprofit performance.     

Managed care for Medicare: some considerations in designing effective information provision programs

Consumer information-processing theory provides a useful framework for policy makers concerned with regulating information provided by managed care organizations. The assumption that consumers are rational information processors and providing more information is better is questioned in this paper. Consumer research demonstrates that when faced with an uncertain decision, consumers adopt simplifying strategies leading to sub-optimal choices. A discussion on how consumers process risk information and the effects of various informational formats on decision outcomes is provided. Categorization theory is used to propose guidelines with regard to providing effective information to consumers choosing among competing managed care plans. Public policy implications borne out of consumer information-processing theory conclude the article.     

The tie effect on information dissemination: the spread of a commercial rumor in Hong Kong

The ability to acquire information has been considered a crucial factor facilitating instrumental actions, such as job search and organizational innovation. Previous social network studies tend to treat the characteristics of social ties through which information is acquired as causes that may affect instrumental outcomes. However, little research has directly examined the spread of information via social ties and the tie effect on information dissemination. Using telephone survey data collected after the outbreak of an extensive commercial rumor in Hong Kong, the present paper investigates the characteristics of social ties through which the information is spread and the tie effect on information dissemination. Results show that while mass media, particularly television, serves as a major channel of information flow, social ties are also widely used. Individuals tend to share information with strong ties, or people with whom they perceive to have good relations. However, information transmitted via kin ties tends to arrive at the respondent faster than via nonkin ties or other communication channels. Implications of the findings are discussed.     

Internet use for health information among college students

Use of the Internet to retrieve health information is increasingly common. The authors surveyed 743 undergraduate students at 2 academic institutions to examine their Internet use, health-seeking behaviors, and attitudes related to the use of the Internet to obtain health information. Fifty-three percent of the respondents indicated that they would like to get health information online, and 28% reported that they would like to attend a health program online. Overall, 74% of the students reported having ever received health information online, and more than 40% reported that they frequently searched the Internet for information. They used various search engines and multiple Web sites to find health information. Issues related to the credibility of the information on health Web sites were crucial considerations for students. The study found differences in Internet use for health information by gender and by level of Internet experience.     

A clinical information system for foster care in Israel

It is a source of great concern in Israel that children placed out of home may lose permanence and may drift in the child welfare system. One way to avoid this danger is to improve the monitoring of the children by using modern information technology as a practice aid. A clinical information system is being installed that responds to the information needs of practitioners on all levels of the foster care system. The viability of the system and its possible effects on practice and on clinical judgment are examined.     

Interactive Health Communication Technologies in the Public Health Sector: Positive Perceptions Still Outpace Actual Utilization

ABSTRACT

Effective population-based and patient-centered public health care is highly dependent on timely and reliable health-related information. The continuous growth and availability of health-related information brought about by the emergence of a new digital communications environment offers a range of opportunities that facilitate access to useful health information for the public health sector–for providers as well as patients. Such advancements, however, can only be realized if public health professionals are knowledgeable about existing sources of online health information, have the ability to successfully judge the reliability of online health information, and are able to acquire the information in a timely and efficient manner. This research follows on the heels of a survey of public health professionals in New York State that concluded that limited access and knowledge negatively impacted utilization of interactive health communication technologies. In this study, a survey was administered to providers at a large county health department located in central Michigan. Results indicate that perceptions regarding the advantages of online health information still far outweigh actual utilization. Barriers to actual utilization include lack of easy access to computers with high-speed connections, trusted and timely online information, training and staff development issues, and organizational policies concerning computer access and usage.     

The Internet's impact on policy evaluation: information compression and credibility

As with all media, the Internet structures and frames information, rewarding some information search and decision behaviors while punishing others and, thereby, strongly influences evaluation research results and possibilities. Now that the Internet is for many evaluators the information medium of choice, the impacts of the medium on evaluation deserve careful attention. The objective of this article is to lay groundwork for a theory of the impact of the Internet on evaluation and policy analysis. Questions addressed include the following: (a) What is the impact of the Internet on the evaluator's professional role, work norms, and work habits? (b) Does the use of the Internet affect who is an evaluator or the meaning of professional evaluation? and (c) How does evaluation via Internet affect the technical quality and credibility of evaluation? A key thesis is that the Internet compresses information in the sense that it is not always easy to distinguish among information resources and, especially, the authority of the information provider and the nature of the knowledge warrant. On one hand, the Internet's information compression seems to hold potential for the democratization of evaluation. On the other hand, the diminished ability to make quality distinctions about evaluation-relevant information may undercut the legitimacy of evaluation.     

News and information leadership in the digital age

This paper examines information networks on social media to draw conclusions about influence relationships among members of the mass media. The project considers social networks and information patterns using Twitter data, first at the newspaper level and second at the journalist level. Using a computational approach, we look for evidence of elite-directed information flows, as well as exploring whether we find evidence of an increase in the democratization of newsmaking. This study finds that elite voices continue to dominate information networks in the digital age; however, it also finds evidence that information can move expeditiously from journalists in local and regional outlets to elite ones, and vice versa. We move further to explore the content of tweets among the journalist network, finding that there are substantial, direct interactions among elite and regional and local journalists. Our results taken together uncover new network patterns and provide a novel insight on the role of information technologies in newsmaking in the digital age.     

Labor Markets and the Process of Income Attainment in the Multimedia Age

Abstract  This paper examines several foreseeable scenarios about the effects of information technology on the labor market and the process of individual's income attainment. While I do not intend to exclude other factors, I argue that computer literacy and information literacy are two distinct but complimentary factors, and that they will be the two critical issues in determining the productive capacities of workers in the multimedia age. I view information literacy as a firm-specific skill, and argue that it will be the key factor in determining the production function of workers within the firm. Computer literacy is viewed as the endowment of information literacy skills. Workers with higher levels of computer literacy will be at an advantage at the time of labor market entry. Further, such workers are more likely to have higher rates of return on firm's investments in information literacy skills. thereby yielding higher productions. Based on the premise that information technology and labor are complementary components which should reveal an increase in the demand for higher skilled workers, I suggest that income differences are likely to widen along the lines of educational attainment and establishment-size. The "Implications" section (V) of the paper examines several issues for further research in this incipient field of sociology.     

The state and the development of an information society: Greek policy and experience

The paper looks into the dynamics of information society policy and its implementation in the Greek context. It argues that information society development is a contested process, influenced by pre‐existing state, economy and society relations. Based on this, it looks into the different aspects of the idiosyncratic path which the evolution of the Greek information society has followed, particularly after 2000. Using Bob Jessop's strategic‐relational approach (SRA) to the state as an analytical framework and drawing on a number of in‐depth interviews with relevant political actors, it provides insights into policy implementation by examining: the public management of information technology projects, how such projects were received in bureaucratic structures and practices, as well as the relationship between the state and the information and communication technology (ICT) sector in public procurement processes. The emphasis is on the period 2000–2008, during which a major operational programme on the information society in Greece was put into effect. The paper also touches upon the post‐2008 experience, suggesting that information society developments might include dynamics operating independently and even in contradiction to the state agenda.     

Risk taking and information aggregation in groups

We report a controlled laboratory experiment examining risk-taking and information aggregation in groups facing a common risk. The experiment allows us to examine how subjects respond to new information, in the form of both privately observed signals and signals reported from others. We find that a considerable number of subjects exhibit ‘reverse confirmation bias’: they place less weight on information from others that agrees with their private signal and more weight on conflicting information. We also find a striking degree of consensus when subjects make decisions on behalf of the group under a random dictatorship procedure. Reverse confirmation bias and the incidence of consensus are considerably reduced when group members can share signals but not communicate.