Lifetime Network Externality and the Dynamics of Group Inequality

Kim, Young Chul (2009): Lifetime Network Externality and the Dynamics of Group Inequality.

Abstract

The quality of one's social network significantly affects his economic success. Even after the skill acquisition period, the social network influences economic success through various routes such as mentoring, job searching, business connections, or information channeling. In this paper I propose that a social network externality which extends beyond the education period -- what I call a Lifetime Network Externality -- is important in explaining the evolution of between-group inequality in an economy. When the members of a group believe that the quality of their social network will be better in the future, more young group members invest in skill achievement because they expect higher returns on investment realized over the working period. As this is repeated in the following generations, the quality of the group's network improves over time. Combining the Lifetime Network Externality, which operates during the labor market phase of a worker's career, with the traditional concepts of peer and parental effects, which operate during the educational phase (Loury 1977), I suggest a full dynamic picture of group inequality in an economy with multiple social groups. I define a notion of Network Trap, wherein a disadvantaged group cannot improve the quality of its network without a governmental intervention, and I explore the egalitarian policies to mobilize the group out of this trap. This social capital approach suggests a positive effect of equality on economic growth in later stages of economic development and a positive effect of inequality in the early stage of economic development, consistent with Galor and Zeira (1993). Unlike the previous literature, the conclusion is derived without imposing the standard assumption of credit market imperfections. Therefore, this implies that equality, by helping disadvantaged groups to move out of the network trap, has a positive effect on economic development even in a matured economy without binding credit constraints, or in a society with public provision of schooling.

• Item Type: MPRA Paper
• Language: English
• Keywords: Lifetime Network Externality; Group Inequality; Network Trap; Social Capital; Economic Development
• Subjects: D - Microeconomics > D6 - Welfare Economics > D63 - Equity, Justice, Inequality, and Other Normative Criteria and Measurement; J - Labor and Demographic Economics > J6 - Mobility, Unemployment, Vacancies, and Immigrant Workers > J60 - General; J - Labor and Demographic Economics > J1 - Demographic Economics > J15 - Economics of Minorities, Races, Indigenous Peoples, and Immigrants ; Non-labor Discrimination; D - Microeconomics > D8 - Information, Knowledge, and Uncertainty > D85 - Network Formation and Analysis: Theory; J - Labor and Demographic Economics > J7 - Labor Discrimination > J70 - General

References

Abramovitz, M. (1993). ''The Search for the Sources of Growth: Areas of Ignorance, Old and New,'' Journal of Economic History, 53: 217-243.

Adsera, A and D. Ray (1998). ``History and Coordination Failure," Journal of Economic Growth 3: 267-276.

Anderson, Elijah (1990). Streetwise: Race, Class, and Change in an Urban Community, Chicago: University of Chicago Press.

Akerlof, George (1997). ``Social Distance and Social Division,'' Econometrica 65: 1005-1027.

Arrow, K.J. (1973). ``The Theory of Discrimination," In Ashenfelter and Rees, editions, Discrimination in Labor Markets.

Assaad R.(1997). ``Kinship Ties, Social Networks and Segmented Labor Markets: Evidence from the Construction Sector in Egypt,'' Journal of Development Economics, 52: 1-30.

Banerjee, B. (1981). ``Rural–urban Migration and Family Ties: an Analysis of Family Considerations in Migration Behavior in India,'' Oxford Bulletin of Economics and Statistics, 43: 321–355.

Banerjee, B. (1983). ``Social Networks in the Migration Process: Empirical Evidence on Chain Migration in India,'' Journal of Developing Areas 17: 185–196.

Banerjee A. and A. Newman (1993). ``Occupational Choice and the Economic Development,'' Journal of Political Economy, 101: 274-298.

Becker, G. S. (1957). The Economics of Discrimination, Chicago: University of Chicago Press.

Benabou, R. (1996). ``Inequality and Growth,'' NBER Macroeconomics Annual 11: 11-74. Bilimoria1, D., S. Perry, X. Liang, E. Stoller, P. Higgins, and C. Taylor (2006). ``How Do Female and Male Faculty Members Construct Job Satisfaction? The Roles of Perceived Institutional Leadership and Mentoring and their Mediating Processes,'' The Journal of Technology Transfer, 31.

Blanchard, O. and C. Kahn (1980). ``The Solution of Linear Difference Models under Rational Expectation Models,'' Econometrica, 48: 1305-1311.

Blau, D.M. and P.K. Robins (1990). ``Job Search Outcomes for the Employed and Unemployed,'' Journal of Political Economy 98: 637–655.

Bowles, S., G.C. Loury and R. Sethi (2007). ``Group Inequality," Unpublished Manuscript, Barnard College, Columbia University.

Buiter, Willem (1982). ``Predetermined and Non-Predetermined Variables in Rational Expectations Models," Economics Letters, 49-54.

Buiter, Willem (1984). ``Saddlepoint Problems in Continuous Time Rational Expectations Models: A General Method and Some Macroeconomic Examples," Econometrica, 52: 665-680.

Campbell, Karen E. and Peter V. Marsden (1990). ``Recruitment and Selection Processes: The Organizational Side of Job Searches,'' in Social Mobility and Social Structure, Ronald L. Breiger (ed.), New York: Cambridge University Press.

Cardoso, Rute and Rudolf Winter-Ebmer (2007). ``Mentoring and Segregation: Female-Led Firms and Gender Wage Policies,'' IZA Discussion Papers, 3210.

Casella, Alessandra and James Rauch (2001). Networks and Markets, Russell Sage Foundation Publications.

Castilla, Emilio (2005). ``Social Networks and Employee Performance in a Call Center," American Journal of Sociology 110: 1243-83.

Chaudhuri, S. and R. Sethi (2008). ``Statistical Discrimination with Peer Effects: Can Integration Eliminate Negative Stereotypes?" Review of Economic Studies 78: 579 - 596.

Coate, S. and G.C. Loury (1993). ``Will Affirmative-Action Policies Eliminate Negative Stereotype?" American Economic Review 83: 1220-1240. Cutler, David and Edward Glaeser (1997). ``Are Ghettos Good or Bad?'' Quarterly Journal of Economics 112: 827-872.

Durlauf, Steven (1996). ``A theory of persistent Income Inequality,'' Journal of Economic Growth 1:75-94.

Durlauf, Steven and Marcel Fafchamps (2004). ``Social Capital," (unpublished ms.).

Fafchamps, M. and B. Minten (1999). ``Relationship and Traders in Madagascar," Journal of Development Studies 35: 1-35.

Fernandez, Roberto, Emilio Castilla and Paul Moore (2000). ``Social Capital at Work: Networks and Employment at a Phone Center," American Journal of Sociology 105: 1288-356.

Falk, Armin and Andrea Ichino (2005). ``Clean Evidence of Peer Effects," Journal of Labor Economics 25.

Fryer, Roland, Glenn C. Loury and Tolga Yuret (2006). ``An Economic Analysis of Color-Blind Affirmative Action,'' Journal of Law, Economics and Organization, forthcoming.

Fryer, Roland and Glenn C. Loury (2005). ``Affirmative Action and Its Mythology,'' Journal of Economic Perspectives 19.

Galor, O. and J. Zeira (1993). ``Income Distribution and Macroeconomics,'' Review of Economic Studies, 60: 35:52.

Galor, O. and D. Tsiddon (1997). ``The Distribution of Human Capital and Economic Growth,'' Journal of Economic Growth, 2: 93-124.

Galor, O. and O. Moav (2002). ``From Physical to Human Capital Accumulation: Inequality and the Process of Development,'' Unpublished Manuscript.

Galor, O. and O. Moav (2006). ``Das Human-Kapital: A Theory of the Demise of the Class Structure,'' Review of Economic Studies, 73: 85-117.

Gibbons, Robert (2004). ``What is Economic Sociology and Should Any Economists Care?" Journal of Economic Perspectives 18.

Granovetter, Mark. S. (1973). ``The Strength of Weak Ties," American Journal of Sociology 78: 1360-1380.

Granovetter, Mark S. (1975). Getting A Job: A Study of Contracts and Careers, Chicago: University of Chicago Press; 2nd Edition 1995.

Granovetter, Mark. S. (1985). ``Economic Action and Social Structure: A Theory of Embeddedness," American Journal of Sociology 91: 481-510.

Gregg, P. and J. Wadsworth (1996). ``How Effective Are State Employment Agencies? Jobcentre Use and Job Matching in Britain,'' Oxford Bulletin of Economics and Statistics 58: 43–67.

Hanushek, Eric, John Kain, and Steve Rivkin (2002). ``New Evidence about Brown vs Board of Education: The Complex Effects of School Racial Composition on Achievement,'' Working Paper 8741, National Bureau of Economic Research.

Ha, Yong Chool (2007). ``Late Industrialization, the State, and Social Changes: The Emergence of Neofamilism in South Korea," Comparative Political Studies 40: 363-382.

Holzer, Harry J. (1987). ``Hiring Procedures in the Firm: Their Economic Determinants and Outcomes," NBER Working Papers No. 2185.

Holzer, Harry J. (1988). ``Search Method Use by Unemployed Youth," Journal of Labor Economics 1-20.

Hoxby, Caroline (2000). ``Peer Effects in the Classroom: Learning from Gender and Race Variation," Natioinal Bureau of Economic Research.

Kain, John F. (1968) ``Housing Segregation, Negro Employment and Metropolitan Decentralization,'' Quarterly Journal of Economics, 82: 175-197.

Khwaja, Asim, Atif Mian and Abid Qamar (2008). ``The Value of Business Networks," Unpublished Manuscript.

Khwaja, Asim and Atif Mian (2005). ``Do Lenders Favor Politically Connected Firms? Rent Provision in an Emerging Financial Market," Quarterly Journal of Economics, 120.

Kim, Man-Hum (1991). ``Sixth Korean Republic and the Deepening of Regional Conflict,'' in Kim Hak-Min et al. eds. Study on Regional Conflict in South Korea, Seoul:\ Hakmin. (in Korean)

Kim, Yong-Hak (2002). ``Social Networks Within Korea: With a Special Reference to Regional Ties,'' mimeo.

Kim, Young Chul and Glenn Loury (2008). ``Group Reputation and Dynamics of Statistical Discrimination," Unpublished Manuscript, Brown University.

Kremer, Michael and Dan Levy (2003). ``Peer Effects and Alcohol Use Among College Students,'' National Bureau of Economic Research.

Krugman, Paul (1991). ``History Versus Expectations,'' Quarterly Journal of Economics 106: 651-667.

Laband, David and Bernard Lentz (1995). ``Workplace Mentoring in the Legal Profession," Southern Economic Journal 61:783-802.

Laband, David and Bernard Lentz (1999). ``The Impact of Having a Mentor on Earnings and Promotion: Evidence from a Panel Study of Lawyers," Applied Economics Letters 6: 785-787.

Lee, Kun-bok and Ki-young Lee (2007). ``Effects of Job Obtaining Method on the Survival Rate,'' mimeo (in Korean).

Livingston Gretchen (2006). ``Gender, Job Searching, and Employment Outcomes among Mexican Immigrants,'' Population Research and Policy Review, 25: 43-66.

Loury, Glenn C. (1977). ``A Dynamic Theory of Racial Income Differences,'' in Women, Minorities and Employment Discrimination, Phyllis Wallace and Annette LaMond (Eds).

Loury, Glenn C. (1995). ``Economic Discrimination: Getting to the Core of the Problem,'' in One By One From the Inside Out: Essays and Reviews on Race and Responsibility in America. New York: The Free Press.

Loury, Glenn C. (2000). ``Social Exclusion and Ethnic Groups: The Challenge to Economics,'' The Annual World Bank Conference on Development Economics 1999, Boris Pleskovic and Joseph E. Stiglitz (eds.), The World Bank.

Loury, Glenn C. (2002). The Anatomy of Racial Inequality. Harvard University Press

Lucas, Robert (1988). ``On the Mechanics of Economic Development,'' Journal of Monetary Economics, 22: 3-42.

Lundberg, Shelly and Richard Startz (1998). ``On the Persistence of Racial Inequality,'' Journal of Labor Economics 16: 292-322.

Mahuteau, Stephane and Promod Junankar (2008). ``Do Migrants Get Good Jobs in Australia? The Role of Ethnic Networks in Job Search,'' IZA Discussion Papers, 3489.

Montgomery, James (1991), ``Social Networks and Labor Market Outcomes: Toward an Economic Analysis," American Economic Review 81(5):1408-18.

Mookherjee, Dilip and Debraj Ray (2006), "Occupational Diversity and Endogenous Inequality," Unpublished Manuscript.

Munshi, K. (2003). ``Networks in the Modern Economy: Mexican Migrants in the US Labor Market,'' Quarterly Journal of Economics 118: 549–599.

Myers, Charles A. and George P. Shultz (1951). The Dynamics of a Labor Market, New York: Prentice-Hall.

Myrdal, Gunnar. (1962), An American Dilemma: The Negro Problem and Modern Democracy. New York: Pantheon Books.

Eren Ozgena, Robert A. Baron (2007). ``Social sources of information in opportunity recognition: Effects of mentors, industry networks, and professional forums,'' Journal of Business Venturing 22: 174-192.

Phelps, E (1972). ``The Statistical Theory of Racism and Sexism," American Economic Review 62: 659-661.

Raphael, Steven (1998). ``The Spatial Mismatch Hypothesis and Black Youth Joblessness: Evidence from the San Francisco Bay Area,'' Journal of Urban Economics, 43: 79-111.

Rees, Albert (1966). ``Information Networks in Labor Markets," American Economic Review (Papers and Proceedings) 56: 559-66.

Rees, Albert and George P. Shultz (1970). Workers in an Urban Labor Market, Chicago: University of Chicago Press.

Richardson, J. David (1995). ``Income Inequality and Trade: How to Think and What to Conclude,'' Journal of Economic Perspectives 9: 33-55.

Rockoff, Jonah E. (2008). ``Does Mentoring Reduce Turnover and Improve Skills of New Employees? Evidence from Teachers in New York City.'' NBER Working Papers No. 13868.

Ross, Stephen L. (1998). ``Racial Differences in Residential and Job Mobility: Evidence Concerning the Spatial Mismatch Hypothesis,'' Journal of Urban Economics, 43: 112-135.

Sethi, Rajiv and Rohini Somanathan (2004). ``Inequality and Segregation,''” Journal of Political Economy 112.

Wahba, Jackline and Yves Zenou (2005). ``Density, social networks and job search methods: Theory and application to Egypt,'' Journal of Development Economics 78: 443-473.

Waldinger, Roger (1996). Still the Promised City?: New Immigrants and African-Americans in Post-Industrial New York, Cambridge, MA: Harvard University.

Weinberg, Bruce, Patricia Reagan and Jeffrey Yankow (2004). ``Do Neighborhoods Affect Hours Worked?'' Journal of Labor Economics, 22: 891-921.

Wood, Adrian (1994). North-South Trade, Employment and Inequality, Oxford: Clarendon Press.

Yu, Eui-Young (1990). ``Regionalism in the South Korean Job Market: An Analysis of Regional-Origin Inequality among Migrants in Seoul," Public Affairs 63: 24-39.

Yu, Eui-Young (2003). ``Regionalism in South Korea: Regional Distribution of Power Elites,'' in Sung-Gook Kim et al. eds. What the Social Ties Mean to Us, Seoul: Tradition and Modernity (in Korean).

Zimmerman, David and Gordon Williams (2003). ``Peer Effects in Higher Education,'' National Bureau of Economic Research.