The Economic Impact of Social Ties: Evidence from German Reunification

Konrad B. Burchardi, Tarek Alexander Hassan

NBER Working Paper No. 17186
Issued in June 2011
NBER Program(s):   CF   ITI   EFG   LS

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 4.6 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.

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This paper was revised on August 22, 2012

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Document Object Identifier (DOI): 10.3386/w17186

Published: Konrad B. Burchardi & Tarek A. Hassan, 2013. "The Economic Impact of Social Ties: Evidence from German Reunification," The Quarterly Journal of Economics, Oxford University Press, vol. 128(3), pages 1219-1271. citation courtesy of

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