Department of Economics
Stanford, CA 94305
NBER Working Papers and Publications
|May 2018||Have R&D Spillovers Changed?|
with Nicholas Bloom, John Van Reenen: w24622
This paper revisits the results of Bloom, Schankerman, and Van Reenen (2013) examining the impact of R&D on the performance of US firms, especially through spillovers. We extend their analysis to include an additional 15 years of data through 2015, and update the measures of firms' interactions in technology space and product market space. We show that the magnitude of R&D spillovers appears to have been broadly similar in the second decade of the 21st Century as it was in the mid-1980s. However, there does seem to have been some increase in the wedge between marginal social returns to R&D and marginal private returns with the ratio of marginal social to private returns increasing to a factor of 4 from 3. There is certainly no evidence that the divergence between public and private return ...
|April 2017||Turbulence, Firm Decentralization and Growth in Bad Times|
with Philippe Aghion, Nicholas Bloom, Raffaella Sadun, John Van Reenen: w23354
What is the optimal form of firm organization during “bad times”? We present a model of delegation within the firm to show that the effect is ambiguous. The greater turbulence following macro shocks may benefit decentralized firms because the value of local information increases (the “localist” view). On the other hand, the need to make tough decisions may favor centralized firms (the “centralist” view). Using two large micro datasets on firm decentralization from ten OECD countries and US administrative data, we find that firms that delegated more power from the Central Headquarters to local plant managers prior to the Great Recession out-performed their centralized counterparts in sectors that were hardest hit by the subsequent crisis. Using direct measures of turbulence based on product...