open access publication

Article, 2022

The Rise of the Machines: Automation, Horizontal Innovation, and Income Inequality

American Economic Journal Macroeconomics, ISSN 1945-7715, 1945-7707, Volume 14, 1, Pages 179-223, 10.1257/mac.20160164

Contributors

Hémous, David 0000-0001-6024-5294 [1] Olsen, Morten Smaerup 0000-0003-4751-6314 [2]

Affiliations

  1. [1] University of Zurich
  2. [NORA names: Switzerland; Europe, Non-EU; OECD];
  3. [2] University of Copenhagen
  4. [NORA names: KU University of Copenhagen; University; Denmark; Europe, EU; Nordic; OECD]

Abstract

We build an endogenous growth model with automation (the replacement of low-skill workers with machines) and horizontal innovation (the creation of new products). Over time, the share of automation innovations endogenously increases through an increase in low-skill wages, leading to an increase in the skill premium and a decline in the labor share. We calibrate the model to the US economy and show that it quantitatively replicates the paths of the skill premium, the labor share, and labor productivity. Our model offers a new perspective on recent trends in the income distribution by showing that they can be explained endogenously. (JEL D31, E25, J24, J31, O33, O41)

Keywords

US economy, automation, automation innovations, decline, distribution, economy, endogenous growth model, growth model, horizontal innovation, horizontally, income, income distribution, income inequality, increase, inequality, innovation, labor, labor productivity, labor share, low-skilled wages, machine, model, perspective, premium, production, sharing, skill premium, skills, trends, wage

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