Identification of Social Interactions

Blume, Lawrence E.; Brock, William A.; Durlauf, Steven N.; Ioannides, Yannis M.

doi:10.2139/ssrn.1660002

Cited by 41 publications

(20 citation statements)

References 155 publications

(141 reference statements)

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“…15 This structural model can be derived from a choice-theoretic approach where each adolescent's fast food consumption is obtained from the maximization of his quadratic utility function which depends on his individual characteristics, his own fast food consumption and his reference group's mean fast food consumption and mean characteristics. This approach also assumes that social interactions have reached a noncooperative (Nash) equilibrium (see Blume et al, 2010). 16 In this case E(α l |G l , x l ) = 0.…”

Section: A Structural Model Of Peer Effects In Fast Food Consumptionmentioning

confidence: 99%

“…It is well known that the identification of peers effects (first equation) is a challenging task. These identification issues were pointed out by Manski (1993) and discussed among others by Moffit (2001), Brock and Durlauf (2001), and Blume et al (2010). On one hand, (endogenous + contextual) peer effects must be identified from correlated (or confounding) factors.…”

Section: Introductionmentioning

confidence: 99%

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Peer effects, fast food consumption and adolescent weight gain

Fortin

Yazbeck

2015

Journal of Health Economics

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This paper aims at opening the black box of peer effects in adolescent weight gain. Using Add Health data on secondary schools in the U.S., we investigate whether these effects partly flow through the eating habits channel. Adolescents are assumed to interact through a friendship social network. We first propose a social interaction model of fast food consumption. Our approach allows to control for correlated effects at the network level and to solve the simultaneity (reflection) problem. We exploit results by Bramoullé, Djebbari and Fortin (2009) which show that if there are two agents who are separated by a link of distance 3 within a network (i.e., two adolescents who are not friends but are linked by two friends), peer effects are identified. The model is estimated using maximum likelihood and generalized 2SLS strategies. We also estimate a panel dynamic weight gain production function relating an adolescent's Body Mass Index (BMI) to his current fast food consumption and his lagged BMI level. Results show that there are positive significant peer effects in fast food consumption among adolescents belonging to a same friendship school network. The estimated social multiplier is 1.59. Our results also suggest that, at the network level, an extra day of weekly fast food restaurant visits increases BMI by 2.4%, when peer effects are taken into account.

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Section: A Structural Model Of Peer Effects In Fast Food Consumptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Peer effects, fast food consumption and adolescent weight gain

Fortin

Yazbeck

2015

Journal of Health Economics

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“…In other words, individuals may choose their neighborhood effects by selecting their residence or workplace or both. Such choices involve information that is unobservable to the researcher and thus requires inference about possible factors that contribute to their choices (Bandiera and Rasul, 2006;Blume et al, 2011;Brock and Durlauf, 2001;Moffitt, 2001). In our analysis, however, the self-selection problem is assumed to be negligible because we confirmed in interviews that the farmers had not relocated or chosen their community due to the introduction of the irrigation system.…”

Section: Neighborhood Effects and Hypothesesmentioning

confidence: 99%

Neighborhood effects and social behavior: The case of irrigated and rainfed farmers in Bohol, the Philippines

Tsusaka

Kajisa

Pede

et al. 2015

Journal of Economic Behavior & Organization

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a b s t r a c tArtifactual field experiments, spatial econometrics, and household surveys are combined in a single study to investigate the neighborhood effects of social behaviors. The dictator and public goods games are conducted among rice farmers in irrigated and non-irrigated areas in the Philippines. We find the neighborhood effects but the magnitude and statistical significance of endogenous social effects vary with the irrigation availability, type of social behavior, and type of neighborhood. Altruistic and cooperative behaviors are significantly influenced by the behaviors of neighbors only in the irrigated area, where social ties are strengthened through collective irrigation management. Through this effect, irrigated farmers' social behaviors become similar to those of one another. Neighborhood effects for cooperative behavior are stronger among farm plot neighbors than among residential neighbors, which may reflect their interactions in irrigation management. Although nondynamic, these findings are consistent with the theory of social norm evolution through common pool resource management.

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“…A number of papers have dealt with the identification and estimation of peer effects with network data (see Blume et al, 2011 for an excellent survey). There are two main methodological approaches.…”

Section: Econometric Network Modelsmentioning

confidence: 99%

Endogenous network production functions with selectivity

Horrace

Liu

Patacchini

2016

Journal of Econometrics

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a b s t r a c tWe consider a production function that transforms inputs into outputs through peer effect networks. The distinguishing features of this model are that the network is formal and observable through worker scheduling, and selection into the network is done by a manager. We discuss identification and suggest several estimation techniques. We tackle endogeneity arising from selection into groups and exposure to common group factors by employing a polychotomous Heckman-type selection correction. We illustrate our method using data from the Syracuse University Men's Basketball team, where at any time the coach selects a lineup and players interact strategically to win games.

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Identification of Social Interactions

Cited by 41 publications

References 155 publications

Peer effects, fast food consumption and adolescent weight gain

Peer effects, fast food consumption and adolescent weight gain

Neighborhood effects and social behavior: The case of irrigated and rainfed farmers in Bohol, the Philippines

Endogenous network production functions with selectivity

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