Christoph E. Boehm

Input Linkages and the Transmission of Shocks: Firm-Level Evidence from the 2011 Tōhoku Earthquake

Using novel firm-level microdata and leveraging a natural experiment, this paper provides causal evidence for the role of trade and multinational firms in the cross-country transmission of shocks. Foreign multinational affiliates in the U.S. exhibit substantial intermediate input linkages with their source country. The scope for these linkages to generate cross-country spillovers in the domestic market depends on the elasticity of substitution with respect to other inputs. Using the 2011 Tohoku earthquake as an exogenous shock, we estimate this elasticity for those firms most reliant on Japanese imported inputs: the U.S. affiliates of Japanese multinationals. These firms suffered large drops in U.S. output in the months following the shock, roughly one-for-one with the drop in imports and consistent with a Leontief relationship between imported and domestic inputs. Structural estimates of the production function for all firms with input linkages to Japan yield disaggreg ated production elasticities that are similarly low. Our results suggest that global supply chains are sufficiently rigid to play an important role in the cross-country transmission of shocks.

Multinationals Offshoring, and the Decline of U.S. Manufacturing

We provide three new stylized facts that characterize the role of multinationals in the U.S. manufacturing employment decline, using a novel microdata panel from 1993-2011 that augments U.S. Census data with firm ownership information and transaction-level trade. First, over this period, U.S. multinationals accounted for 41% of the aggregate manufacturing decline, disproportionate to their employment share in the sector. Second, U.S. multinational-owned establishments had lower employment growth rates than a narrowly-defined control group. Third, establishments that became part of a multinational experienced job losses, accompanied by increased foreign sourcing of intermediates by the parent firm. To establish whether imported intermediates are substitutes or complements for U.S. employment, we develop a model of input sourcing and show that the employment impact of foreign sourcing depends on a key elasticity -- of firm size to production efficiency. Structural estimation of this elasticity finds that imported intermediates substitute for U.S. employment. In general equilibrium, our estimates imply a sizable manufacturing employment decline of 13%.

Input Linkages and the Transmission of Shocks: Firm-Level Evidence from the 2011 Tohoku Earthquake

Using novel firm-level microdata and leveraging a natural experiment, this paper provides causal evidence for the role of trade and multinational firms in the cross-country transmission of shocks. The scope for trade linkages to generate cross-country spillovers depends on the elasticity of substitution with respect to domestic inputs. Using the 2011 Tōhoku earthquake as an exogenous shock, we structurally estimate production elasticities at the firm level and find greater complementarities in input usage than previously thought. For Japanese affiliates in the United States, output falls roughly one-for-one with declines in imports, consistent with a relationship between imported and domestic inputs that is close to Leontief.

The Role of Global Supply Chains in the Transmission of Shocks: Firm-Level Evidence from the 2011 Tōhoku Earthquake

The April 2016 Kumamoto earthquake in southwest Japan has sent ripple effects through global supply chains. Toyota, Honda and Sony halted most Japanese production following the quake, and more recently General Motors announced production stoppages at four North American plants, citing parts shortages. Such far-reaching consequences of natural disasters are not without precedent.