Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/55553
Authors: 
Koren, Miklós
Tenreyro, Silvana
Year of Publication: 
2005
Series/Report no.: 
Working paper series // Federal Reserve Bank of Boston 05-1
Abstract: 
Why is GDP so much more volatile in poor countries than in rich ones? To answer this question, we propose a theory of technological diversification. Production makes use of different input varieties, which are subject to imperfectly correlated shocks. As in endogenous growth models, technological progress increases the number of varieties, raising average productivity. The new insight is that an expansion in the number of varieties also lowers the volatility of output. This is because additional varieties provide diversification benefits against variety-specific shocks. In the model, technological complexity evolves endogenously in response to profit incentives. Complexity (and hence output stability) is positively related with the development of the country, the comparative advantage of the sector, and the sector's skill and technology intensity. Using sector-level data for a broad sample of countries, we provide extensive empirical evidence confirming the cross-country and cross-sectoral predictions of the model.
Document Type: 
Working Paper

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