The Economic Impact of Social Ties: Evidence from German Reunification
London School of Economics & Political Science (LSE)
Tarek A. Hassan
University of Chicago - Booth School of Business; National Bureau of Economic Research (NBER); Centre for Economic Policy Research (CEPR)
August 16, 2012
Chicago Booth Research Paper No. 10-27
Fama-Miller Working Paper
We use the fall of the Berlin Wall in 1989 to show that personal relationships which individuals maintain for non-economic reasons can be an important determinant of regional economic growth. We show that West German households who have social ties to East Germany in 1989 experience a persistent rise in their personal incomes after the fall of the Berlin Wall. Moreover, the presence of these households significantly affects economic performance at the regional level: it increases the returns to entrepreneurial activity, the share of households who become entrepreneurs, and the likelihood that firms based within a given West German region invest in East Germany. As a result, West German regions which (for idiosyncratic reasons) have a high concentration of households with social ties to the East exhibit substantially higher growth in income per capita in the early 1990s. A one standard deviation rise in the share of households with social ties to East Germany in 1989 is associated with a 4.7 percentage point rise in income per capita over six years. We interpret our findings as evidence of a causal link between social ties and regional economic development.
Number of Pages in PDF File: 67
Keywords: economic development, German reunification, networks, social ties
JEL Classification: O11, P16, N40
Date posted: August 24, 2010 ; Last revised: August 18, 2012
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