Faraway, So Close! Technology Diffusion and Firm Heterogeneity in the Medium Term Cycle of Advanced Economies (Updated May 2019)

Large US firms, by diffusing embodied technology through trade in intermediates, appear to drive Europe’s output over the medium term. We develop a two-country model of endogenous growth in varieties, cross-country firm heterogeneity and trade to match this evidence. A US TFP slowdown generates a pronounced recession in Europe, while a negative investment-specific shock also imparts a protracted recession in the US, since GDP and firm productivity stay below trend beyond a decade. Heterogeneous firms, with endogenously changing productivity cut-offs, and the responses of innovators and adopters determine medium-term adjustment, as import switching processes unfold