Quantifying Market Power and Business Dynamism in the Macroeconomy

We propose a general equilibrium model with oligopolistic output markets where two channels can cause a change in market power: (i) technology, via changes to productivity shocks and the cost of entry, (ii) market structure, via changes to the number of potential competitors. First, we disentangle these narratives by matching data on markups, labor reallocation and costs, finding that both channels are necessary to account for the data. Second, we show that changes in technology and market structure yield positive welfare effects through reallocation and selection, but off-setting negative effects from dead-weight loss and overhead. Overall, welfare is 9 percent lower in 2016 than in 1980. Third, the changes we identify explain and decompose cross-sectional patterns in declining business dynamism, declining equilibrium wages and labor force participation via reallocation toward larger, more productive firms.

• Publication year

  2021

• Venue

  Social Science Research Network

• Publication date

  2021-05-10

• Fields of study

  Economics

• Identifiers
  DOI 10.3386/W28761
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• No references are available for this paper.

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