English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

I update the Greenwood, Hercowitz, and Krusell (1997, GHK) decomposition of U.S. growth into contributions from neutral and investment-specific (IS) technological progress. I allow the decomposition to vary across sub-samples, reflecting the presence of trend breaks in the data. The estimates show strong heterogeneity across periods: while neutral technological progress explained virtually all growth between 1950 and the mid-1970s, IS technological progress accounts for 75% of growth since the 1980s. These results paint a more complex picture of postwar U.S. growth than GHK’s original decomposition and call for a better understanding of the 1970s productivity shifts.

Trend breaks and the long-run implications of investment-specific technological progress