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on Network Economics |
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Issue of 2018‒04‒02
five papers chosen by Pedro CL Souza Pontifícia Universidade Católica do Rio de Janeiro |
| By: | Julie Beugnot Marie Claire Villeval; Bernard Fortin; Guy Lacroix; Marie Claire Villeval |
| Abstract: | We investigate whether peer effects at work differ by gender and whether gender differences in peer effects -if any- depend on work organization. We develop a social network model with gender heterogeneity that we test in a real-effort laboratory experiment. We compare sequential networks in which information flows from peers to the worker and simultaneous networks where it disseminates bi-directionally. We identify strong gender differences as females disregard their peers’ performance in simultaneous networks, while males are influenced by peers in both networks. Females may perceive the environment in simultaneous networks as being more competitive than in sequential networks. |
| Keywords: | Gender, Peer effects, Social Networks, Work effort, Experiments |
| JEL: | C91 J16 J24 J31 M52 |
| Date: | 2018 |
| URL: | https://d.repec.org/n?u=RePEc:lvl:crrecr:1803&r=net |
| By: | Dasha Safonova (University of Notre Dame) |
| Abstract: | Shocks to the structure of the interbank lending network can have important macroeconomic repercussions. This paper examines the impact of the dynamic structure of the interbank lending network on interest rates and investment in the nonfinancial sector. By incorporating a network of bank relationships into a general equilibrium model with monetary policy, I show that the aggregate interest rate increases in response to a shock that destroys a large fraction of bank relationships and decreases in response to a shock that destroys a small fraction of relationships. Moreover, the shape of the interbank network matters for these dynamics: the interest rate is least responsive to the network disruptions if the interbank network is scale-free. Additionally, the amplification and propagation of the network shocks depend on the corridor of the policy rates set by the central bank. In particular, as the difference between the discount rate and the excess reserve rate decreases, the effect of a network disruption on interest rates becomes less significant but more persistent, which in turn leads to a smaller but more prolonged effect on the real sector. |
| Date: | 2017 |
| URL: | https://d.repec.org/n?u=RePEc:red:sed017:1568&r=net |
| By: | Mohamed Belhaj (GREQAM - Groupement de Recherche en Économie Quantitative d'Aix-Marseille - ECM - Ecole Centrale de Marseille - CNRS - Centre National de la Recherche Scientifique - AMU - Aix Marseille Université - EHESS - École des hautes études en sciences sociales); Frédéric Deroïan (GREQAM - Groupement de Recherche en Économie Quantitative d'Aix-Marseille - ECM - Ecole Centrale de Marseille - CNRS - Centre National de la Recherche Scientifique - AMU - Aix Marseille Université - EHESS - École des hautes études en sciences sociales) |
| Abstract: | We consider a network game with local complementarities. A policymaker, aiming at minimizing or maximizing aggregate effort, contracts with a single agent on the network to trade effort change against transfer. The policymaker has to find the best agent and the optimal contract to offer. Our study shows that for all utilities with linear best-responses, it only takes two statistics about the position of each agent on the network to identify the key player: the Bonacich centrality and a weighted measure of the number of closed walks originating from the agent. We also characterize key players under linear quadratic utilities for various contractual arrangements. |
| Keywords: | key player,network,linear interaction,incentives,contract,limited budget |
| Date: | 2018–02 |
| URL: | https://d.repec.org/n?u=RePEc:hal:wpaper:halshs-01699849&r=net |
| By: | Eugenio M Cerutti; Haonan Zhou |
| Abstract: | This paper analyses the nature of the increasing regionalization process in global banking. Despite the large decline in aggregate cross-border banking lending volumes, some parts of the global banking network are currently more interlinked regionally than before the Global Financial Crisis. After developing a simple theoretical model capturing banks' internationalization decisions, our estimation shows that this regionalization trend is present even after controlling for traditional gravitational variables (e.g. distance, language, legal system, etc.), especially among lenders in EMs and non-core banking systems, such as Australia, Canada, Hong Kong, and Singapore. Moreover, this regionalization trend was present before the GFC, but it has increased since then, and it seems to be associated with regulatory variables and the opportunities created by the retrenchment of several European lenders. |
| Date: | 2018–03–09 |
| URL: | https://d.repec.org/n?u=RePEc:imf:imfwpa:18/46&r=net |
| By: | Sophia Chen; Estelle Dauchy |
| Abstract: | How much do firms benefit from foreign R&D and through what channel? We construct a global network of corporate innovation using more than 1.5 million patents granted to firms in OECD countries. We test the “international technology sourcing” hypothesis that foreign innovation activities tap into foreign R&D and improve home productivity through knowledge spillovers. We find that firms with stronger inventor presence in technology frontier countries benefit disproportionately more from their R&D. The strength of knowledge spillovers depends on the direction of technology sourcing. Knowledge externality is larger for firms in technology frontier countries than for firms in non-frontier countries. |
| Date: | 2018–03–12 |
| URL: | https://d.repec.org/n?u=RePEc:imf:imfwpa:18/51&r=net |