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Hierarchies and the Survival of Prisoners of War During World War II
Clifford Holderness & Jeffrey Pontiff
Management Science, forthcoming
Abstract:
Using a comprehensive database of American prisoners of war during World War II, we find that survival from captivity generally declines as the hierarchy of a prisoner's group becomes steeper or more closely matches the military's established hierarchy. There is no evidence that survival is enhanced by being held in more hierarchical groups. One interpretation of these findings that is consistent with survivors' accounts is that the military's hierarchy was too inflexible to adapt from the battlefield to captivity and this inflexibility impeded trading among the prisoners.
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The Köhler Effect: Motivation Gains and Losses in Real Sports Groups
Kaitlynn Osborn et al.
Sport, Exercise, and Performance Psychology, forthcoming
Abstract:
Two investigations aimed to document motivation gains and losses (the Köhler effect and social-loafing effects) in real-life group work. Specifically, using archival data, motivation changes were analyzed from individual to additive group competition in collegiate swim, and high school track and field relays. Results showed that inferior group members had significantly greater motivation gains than noninferior teammates in preliminary and final swim races. Motivation gains also were significantly higher in the final compared to the preliminary race. Similar results were replicated with the track and field athletes with the weakest member of the team showing larger difference scores from individual to group competition compared to middle-ranked and higher-ranked teammates. On the whole, both studies provide ecological support for the Köhler effect, and that inferior team members showed the greatest motivation gains. No significant differences were found to support social-loafing effects within the same groups, but performances of superior group members tended to be slower.
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Identifying Influential and Susceptible Members of Social Networks
Sinan Aral & Dylan Walker
Science, 20 July 2012, Pages 337-341
Abstract:
Identifying social influence in networks is critical to understanding how behaviors spread. We present a method for identifying influence and susceptibility in networks that avoids biases in traditional estimates of social contagion by leveraging in vivo randomized experimentation. Estimation in a representative sample of 1.3 million Facebook users showed that younger users are more susceptible than older users, men are more influential than women, women influence men more than they influence other women, and married individuals are the least susceptible to influence in the decision to adopt the product we studied. Analysis of influence and susceptibility together with network structure reveals that influential individuals are less susceptible to influence than non-influential individuals and that they cluster in the network, which suggests that influential people with influential friends help spread this product.
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Residential Mobility, Social Support Concerns, and Friendship Strategy
Janetta Lun et al.
Social Psychological and Personality Science, forthcoming
Abstract:
The present research examined how residential mobility affects the extent to which people compartmentalize friendship activities (i.e., selecting different friends for different activities) and the role of social support concerns in the relationship between mobility and friendship compartmentalization. Studies 1 and 2 showed that people who had moved frequently while growing up or who were primed to think about moving compartmentalized their friendships more if they valued social support in friendship. Study 3 showed that this effect was driven by concerns over social support availability. The findings suggest that residential mobility changes friendship structure in ways that satisfy individuals' expectations of friendship.
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Meredith Conroy, Jessica Feezell & Mario Guerrero
Computers in Human Behavior, September 2012, Pages 1535-1546
Abstract:
In what ways do online groups help to foster political engagement among citizens? We employ a multi-method design incorporating content analysis of online political group pages and original survey research of university undergraduates (n = 455) to assess the relationship between online political group membership and political engagement - measured through political knowledge and political participation surrounding the 2008 election. We find that participation in online political groups is strongly correlated with offline political participation, as a potential function of engaging members online. However, we fail to confirm that there is a corresponding positive relationship between participation in online political groups and political knowledge, likely due to low quality online group discussion.
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Peer Effects in Program Participation
Gordon Dahl, Katrine Løken & Magne Mogstad
NBER Working Paper, June 2012
Abstract:
The influence of peers could play an important role in the take up of social programs. However, estimating peer effects has proven challenging given the problems of reflection, correlated unobservables, and endogenous group membership. We overcome these identification issues in the context of paid paternity leave in Norway using a regression discontinuity design. Our approach differs from existing literature which attempts to measure peer effects by exploiting random assignment to peer groups; in contrast, we study peer effects in naturally occurring peer groups, but exploit random variation in the "price" of a social program for a subset of individuals. Fathers of children born after April 1, 1993 in Norway were eligible for one month of governmental paid paternity leave, while fathers of children born before this cutoff were not. There is a sharp increase in fathers taking paternity leave immediately after the reform, with take up rising from 3% to 35%. While this quasi-random variation changed the cost of paternity leave for some fathers and not others, it did not directly affect the cost for the father's coworkers or brothers. Therefore, any effect on the brother or the coworker can be attributed to the influence of the peer father in their network. Our key findings on peer effects are four-fold. First, we find strong evidence for substantial peer effects of program participation in both workplace and family networks. Coworkers and brothers are 11 and 15 percentage points, respectively, more likely to take paternity leave if their peer father was induced to take up leave by the reform. Second, the most likely mechanism is information transmission about costs and benefits, including increased knowledge of how an employer will react. Third, there is essential heterogeneity in the size of the peer effect depending on the strength of ties between peers, highlighting the importance of duration, intensity, and frequency of social interactions. Fourth, the estimated peer effect gets amplified over time, with each subsequent birth exhibiting a snowball effect as the original peer father's influence cascades through a firm. Our findings demonstrate that peer effects can lead to long-run equilibrium participation rates which are substantially higher than would otherwise be expected.
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Global Networks and Domestic Policy Convergence: A Network Explanation of Policy Changes
Xun Cao
World Politics, July 2012, Pages 375-425
Abstract:
National economies are embedded in complex networks such as trade, capital flows, and intergovernmental organizations (IGOs). These globalization forces impose differential impacts on national economies depending on a country's network positions. This article addresses the policy convergence-divergence debate by focusing on how networks at the international level affect domestic fiscal, monetary, and regulatory policies. The author presents two hypotheses: first, similarity in network positions induces convergence in domestic economic policies as a result of peer competitive pressure. Second, proximity in network positions facilitates policy learning and emulation, which result in policy convergence. The empirical analysis applies a latent-space model for relational/dyadic data and indicates that position similarity in the network of exports induces convergence in fiscal and regulatory policies; position similarity in the network of transnational portfolio investments induces convergence in fiscal policies; and position proximity in IGO networks is consistently associated with policy convergence in fiscal, monetary, and regulatory policies.
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Aggression, Exclusivity, and Status Attainment in Interpersonal Networks
Robert Faris
Social Forces, June 2012, Pages 1207-1235
Abstract:
This paper engages two core ideas: first, that status mobility is facilitated through connectivity, or having a large number of ties to others, as suggested by theories of social capital and social networks; and second, that aggression is an expressive or irrational reaction to frustrations, humiliations, or social pathologies. In contrast, I argue that in certain contexts, both of these propositions are reversed: status is attained through selective bridging rather than high network connectivity, and aggression is instrumental for social climbing, particularly when it is directed toward high status, aggressive, or socially close targets. The argument is expected to hold only in contexts that are small (in terms of the number of participants), bounded (in terms of the ease and frequency with which they are entered and exited), and flat (in terms of formal hierarchy). Data from a longitudinal survey of adolescents combined with information from their high school yearbooks provide a unique opportunity to test these propositions, which are supported. High connectivity decreases the likelihood of attaining high status, while selective bridging increases it. Status is further enhanced by reputational, as opposed to physical, aggression, and decreased by victimization. Moreover, aggression toward aggressive, high status, or socially close peers provide additional status boosts. These effects hold regardless of the extent to which status is desired.
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Impact of social network structure on content propagation: A study using YouTube data
Hema Yoganarasimhan
Quantitative Marketing and Economics, March 2012, Pages 111-150
Abstract:
We study how the size and structure of the local network around a node affects the aggregate diffusion of products seeded by it. We examine this in the context of YouTube, the popular video-sharing site. We address the endogeneity problems common to this setting by using a rich dataset and a careful estimation methodology. We empirically demonstrate that the size and structure of an author's local network is a significant driver of the popularity of videos seeded by her, even after controlling for observed and unobserved video characteristics, unobserved author characteristics, and endogenous network formation. Our findings are distinct from those in the peer effects literature, which examines neighborhood effects on individual behavior, since we document the causal relationship between a node's local network position and the global diffusion of products seeded by it. Our results provide guidelines for identifying seeds that provide the best return on investment, thereby aiding managers conducting buzz marketing campaigns on social media forums. Further, our study sheds light on the other substantive factors that affect video consumption on YouTube.
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Stefan Hoffmann & Katharina Hutter
Journal of Consumer Policy, June 2012, Pages 215-236
Abstract:
A new form of ethical consumption has recently evolved: The carrotmob. As in a flashmob, consumers collectively swarm a specific store and purchase its goods in order to reward corporate socially responsible behaviour. The present paper introduces a conceptionalization of carrotmobs that takes into account the perspective of the three relevant parties: activists, companies, and consumers. First, the paper considers activists' objectives in initiating such a social movement. It describes how they use guerrilla tactics to foster the participation of companies and consumers. Second, the paper considers the perspective of the target company, stressing the role of corporate social responsibility and describing how companies compete in an auction to become the carrotmob target. Third, the paper highlights the consumer perspective, discussing different views on consumer power and the motivation to participate in a carrotmob. The paper also points out directions for further empirical research for each of these three perspectives.
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Tsachi Ein-Dor & Orgad Tal
European Journal of Social Psychology, forthcoming
Abstract:
Attachment-related anxiety has repeatedly been associated with poorer adjustment in various social, emotional, and behavioral domains. Building on social defense theory, we examined a possible advantage of having some group members who score high in attachment anxiety - a heightened tendency to deliver a warning message without delay. We led participants to believe that they accidently activated a computer virus that erased an experimenter's computer. We then asked them to alert the department's computer technicians to the incident. On their way, they were presented with four decision points where they could choose either to delay their warning or to continue directly to the technicians' office. We found that anxious individuals were less willing to be delayed on their way to deliver a warning message. This result remained significant when attachment avoidance, extroversion, and neuroticism were statistically controlled. Results are discussed in relation to the possible adaptive functions of certain personality characteristics often viewed as undesirable.
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Social Network Resources and Management of Hypertension
Erin York Cornwell & Linda Waite
Journal of Health and Social Behavior, June 2012, Pages 215-231
Abstract:
Hypertension is one of the most prevalent chronic diseases among older adults, but rates of blood pressure control are low. In this article, we explore the role of social network ties and network-based resources (e.g., information and support) in hypertension diagnosis and management. We use data from the National Social Life, Health, and Aging Project to identify older adults with undiagnosed or uncontrolled hypertension. We find that network characteristics and emotional support are associated with hypertension diagnosis and control. Importantly, the risks of undiagnosed and uncontrolled hypertension are lower among those with larger social networks - if they discuss health issues with their network members. When these lines of communication are closed, network size is associated with greater risk for undiagnosed and uncontrolled hypertension. Health care utilization partially mediates associations with diagnosis, but the benefits of network resources for hypertension control do not seem to stem from health-related behaviors.
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Michelle Baddeley & Sophia Parkinson
Journal of Socio-Economics, October 2012, Pages 558-573
Abstract:
In a jury decision-making, individual viewpoints must converge to reach a group consensus. Convergence of viewpoints may reflect reasonable compromises, for example if jury deliberations reflect informational influences and social learning which allow individual jurors to correct biases, misunderstandings and/or imperfect recall of evidence. Conversely, some individuals may converge towards others' viewpoints because of normative influences including peer pressure and preferences for conformity and these can generate biases in the final jury judgments. This paper presents experimental data showing that groups do have a significant tendency to compromise in jury-like settings. Econometric evidence shows that group characteristics, including the presence of acquaintances and strangers within the jury group, affect the extent of compromise. The implications are that jury deliberations may be biased by factors not relevant to a specific case, limiting the objectivity of jury decisions.
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Electrophysiological precursors of social conformity
Anna Shestakova et al.
Social Cognitive and Affective Neuroscience, forthcoming
Abstract:
Humans often change their beliefs or behavior due to the behavior or opinions of others. The present study explored, with the use of human event-related potentials (ERPs), whether social conformity is based on a general performance-monitoring mechanism. We tested the hypothesis that conflicts with a normative group opinion evoke a feedback-related negativity (FRN) often associated with performance monitoring and subsequent adjustment of behavior. The experimental results show that individual judgments of facial attractiveness were adjusted in line with a normative group opinion. A mismatch between individual and group opinions triggered a frontocentral negative deflection with the maximum at 200 ms, similar to FRN. Overall a conflict with a normative group opinion triggered a cascade of neuronal responses: from an earlier FRN response reflecting a conflict with the normative opinion to a later ERP component (peaking at 380 ms) reflecting a conforming behavioral adjustment. These results add to the growing literature on neuronal mechanisms of social influence by disentangling the conflict-monitoring signal in response to the perceived violation of social norms and the neural signal of a conforming behavioral adjustment.
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Wendy de Waal-Andrews & Ilja van Beest
Personality and Social Psychology Bulletin, forthcoming
Abstract:
People's success or failure to gain inclusion in groups may result from their own actions or the actions of others. Two studies compared the personal and interpersonal consequences of inclusion and exclusion when they resulted from these two processes. People's own failure to "claim" inclusion in a computerized ballgame was equally detrimental for fundamental needs and made people equally unlikely to behave prosocially to group members, as being denied inclusion by others. In contrast, the beneficial effects of inclusion depended on the process with which it was obtained, and meta-perceptions of warmth mediated these differences; people who succeeded to claim inclusion thought their interaction partners liked them less than people who were granted inclusion, and as a result, their fundamental needs were satisfied less, and they behaved less prosocially.