Topics for the Master Thesis Roman Chuhay,Higher School of Economics

Topics for the Master Thesis Roman Chuhay, Higher School of Economics 2013 Roman Chuhay (HSE) Topics for the Master Thesis 2013 / 20 Outline of the Presentation Personal Information Roman Chuhay (HSE) Topics for the Master Thesis 2013 / 20 Outline of the Presentation Personal Information Some visual examples of Networks Roman Chuhay (HSE) Topics for the Master Thesis 2013 / 20 Outline of the Presentation Personal Information Some visual examples of Networks Types of networks and research questions Roman Chuhay (HSE) Topics for the Master Thesis 2013 / 20 Outline of the Presentation Personal Information Some visual examples of Networks Types of networks and research questions Networks and/vs ξconomics Main sources of information Selected topics Work in progress Roman Chuhay (HSE) Topics for the Master Thesis 2013 / 20 Personal Information Roman Chuhay (home page) Research Interests: Microeconomics, Social Networks, Financial Economics, Industrial Organization, Economics of Information, Labor Economics Key Topics: Diffusion of information and word of mouth The impact of social networks on banks’ stability and financial system as a whole Cheap talk and signaling Labor markets (Mortensen-Pissarides framework) Roman Chuhay (HSE) Topics for the Master Thesis 2013 / 20 Visual Examples of Networks Figure: Map of the 2004 U.S Presidential election by counties (M Newman) Roman Chuhay (HSE) Topics for the Master Thesis 2013 / 20 Visual Examples of Networks contd Figure: The network structure of political blogs prior to the 2004 U.S Presidential election reveals two natural and well-separated clusters Moreover conservative blogs on average have more links compared to liberal (Adamic and Glance, 2005) Roman Chuhay (HSE) Topics for the Master Thesis 2013 / 20 Visual Examples of Networks Figure: The social network of friendships within a 34-person karate club provides clues to the fault lines that eventually split the club apart (Zachary, 1977) Roman Chuhay (HSE) Topics for the Master Thesis 2013 / 20 Visual Examples of Networks Figure: Community structure identified by Girvan and Newman 2002 As you can see all nodes were correctly placed in the communities apart the node Roman Chuhay (HSE) Topics for the Master Thesis 2013 / 20 Types of Networks: Roman Chuhay (HSE) Topics for the Master Thesis 2013 13 / 20 Types of Networks: Technological networks: Designed typically for distribution of a commodity or service Infrastructure networks: e.g., Internet (connections of routers or administrative domains), power grid Transportation networks: roads, railroads, airline routes, mail services Questions: Performance? Congestion? Fragility? Cascading failures? Roman Chuhay (HSE) Topics for the Master Thesis 2013 13 / 20 Types of Networks: Technological networks: Designed typically for distribution of a commodity or service Infrastructure networks: e.g., Internet (connections of routers or administrative domains), power grid Transportation networks: roads, railroads, airline routes, mail services Questions: Performance? Congestion? Fragility? Cascading failures? Biological networks: A number of biological systems can also be represented as networks Food web, protein interaction network, network of metabolic pathways Questions: Stability of the eco-system? Designing of a new drug taking into account protein interaction networks, etc Roman Chuhay (HSE) Topics for the Master Thesis 2013 13 / 20 Networks and/vs ξconomics Roman Chuhay (HSE) Topics for the Master Thesis 2013 14 / 20 Networks and/vs ξconomics Traditionally, economic phenomena are studied in the framework of centralized markets: Roman Chuhay (HSE) Topics for the Master Thesis 2013 14 / 20 Networks and/vs ξconomics Traditionally, economic phenomena are studied in the framework of centralized markets: Interactions are anonymous Roman Chuhay (HSE) Topics for the Master Thesis 2013 14 / 20 Networks and/vs ξconomics Traditionally, economic phenomena are studied in the framework of centralized markets: Interactions are anonymous Prices are main coordination mechanism Roman Chuhay (HSE) Topics for the Master Thesis 2013 14 / 20 Networks and/vs ξconomics Traditionally, economic phenomena are studied in the framework of centralized markets: Interactions are anonymous Prices are main coordination mechanism This approach, however, is inappropriate for understanding of a number of phenomena: Roman Chuhay (HSE) Topics for the Master Thesis 2013 14 / 20 Networks and/vs ξconomics Traditionally, economic phenomena are studied in the framework of centralized markets: Interactions are anonymous Prices are main coordination mechanism This approach, however, is inappropriate for understanding of a number of phenomena: Diffusion of innovations Job search through contacts Differences in trust and cooperativeness Roman Chuhay (HSE) Topics for the Master Thesis 2013 14 / 20 Main sources of Info General public books: N A Christakis, J H Fowler “Connected: The Surprising Power of Our Social Networks and How They Shape Our Lives.” D J Watts, “Six Degrees: The Science of a Connected Age.” A.-L Barabasi, “Linked: How Everything Is Connected to Everything Else and What It Means.” Roman Chuhay (HSE) Topics for the Master Thesis 2013 15 / 20 Main sources of Info Text books and surveys: Vega-Redondo, F (2007), “Complex Social Networks Econometric Society Monographs,” Cambridge: Cambridge University Press Goyal, S (2007), “Connections: An Introduction to the Economics of Networks,” Princeton University Press Jackson, M.O (2008), “Social and Economic Networks,” Princeton: Princeton University Press Newman, M (2010), “Networks: An Introduction,” Oxford University Press Newman, M E J (2003): ”The structure and function of complex networks”, SIAM Review 45, 167-256 Roman Chuhay (HSE) Topics for the Master Thesis 2013 16 / 20 Selected Topics Diffusion on networks: Campbell, A., 2009, “Tell Your Friends! Word of Mouth and Percolation in Social Networks,” job-market paper Galeotti, A and Goyal, S., 2008, “A Theory of Strategic Diffusion,” forthcoming in Rand Journal of Economics Leskovec, J., Adamic, L A and Huberman, B A., 2007, “The Dynamics of Viral Marketing,” In Proc 7th ACM Conference on Electronic Commerce Newman, M., 2002, “The Spread of Epidemic Diseases on Networks,” Physical Reveiw E, Volume 66(1), art no 016128 Newman, M., 2003, “Mixing patterns in networks,” Physical Reveiw E, Volume 67, art no 026126 Roman Chuhay (HSE) Topics for the Master Thesis 2013 17 / 20 Selected Topics Labor markets and networks: Granovetter, M., 1973, “The Strength of Weak Ties,” American Journal of Sociology, Vol 78, Issue 6, pp 1360-1380 Boorman S.A., 1975, “A Combinatiorial Optimization Model for Transmission of Job Information Through Contact Networks,” The Bell Journal of Economics, Vol 6, pp 216-249 Calvo-Armengol A., Zenou Y., 2005, “Job matching, social network and word-of-mouth communication,” Journal of Urban Economics, 57, pp 500522 Calvo-Armengol, A., Jackson, M.O., 2004, “The Effects of Social Networks on Employment and Inequality,” American Economic Review, 94(3), pp 426454 Galeotti A., Merlino L.P.,, 2009, “Endogenous Job Contact Networks,” manuscript, University of Essex Ioannides Y.M., Soetevent A.R., 2006, “Wages and Employment in a Random Social Network with Arbitrary Degree Distribution,” The American Economic Review, Vol 96, pp 270-274 Roman Chuhay (HSE) Topics for the Master Thesis 2013 18 / 20 Selected Topics Network formation: Bala, V and S Goyal (1999), “A Non-Cooperative Model of Network Formation,” Econometrica, 1181-1230 Jackson, M.O and A Wolinsky (1996), “A strategic model of economic and social networks,” Journal of Economic Theory, 71, 44-74 Jackson, M.O and B Rogers (2007), “Meeting strangers and friends of friends: How random are socially generated networks?” American Economic Review, 97(3), 890-915 Roman Chuhay (HSE) Topics for the Master Thesis 2013 19 / 20 Erd¨os Number Erd¨os Erd¨os Erd¨os Erd¨os Erd¨os Erd¨os Erd¨os Erd¨os Erd¨os Erd¨os Erd¨os Erd¨os Erd¨os Erd¨os number number number number number number number number number number number number number number — person — 504 people — 6593 people — 33605 people — 83642 people — 87760 people — 40014 people — 11591 people — 3146 people — 819 people 10 — 244 people 11 — 68 people 12 — 23 people 13 — people Roman Chuhay (HSE) Topics for the Master Thesis 2013 20 / 20