What the study found
The note argues that the treatment of sectoral investment shocks in the cited article is methodologically inconsistent. Because the distinction between purchasing and supplying industries is not followed consistently, the final-demand vector and associated import propensities are specified inaccurately, and the estimated multipliers cannot be interpreted as investment-expenditure multipliers for the sectors considered.
Why the authors say this matters
The authors conclude that standard input-output conventions for gross fixed capital formation should be followed. They suggest that a scenario-based approach would be required to analyze investment effects in a conceptually consistent manner.
What the researchers tested
This is a methodological note reviewing the sectoral investment framework used in Stamegna et al. (2024). The note checks how purchasing and supplying industries are treated, how the final-demand vector is defined, and how import propensities are assigned within an input-output framework.
What worked and what didn't
The note finds that the distinction between purchasing and supplying industries was not consistently followed. It also states that this led to an inaccurate final-demand vector and import propensities, so the resulting multipliers are not interpretable as investment-expenditure multipliers.
What to keep in mind
The abstract presents this as a methodological critique and does not report new empirical estimates. It also does not provide detailed limitations beyond noting that a scenario-based approach would be needed for a conceptually consistent analysis.
Key points
- The note says the cited study handled sectoral investment shocks inconsistently.
- It states that purchasing and supplying industries were not clearly distinguished throughout.
- The final-demand vector and import propensities are described as inaccurately specified.
- The estimated multipliers cannot be read as investment-expenditure multipliers for the sectors considered.
- The authors say standard input-output conventions and a scenario-based approach would be needed for a consistent analysis.
Disclosure
- Research title:
- Methodological issues make investment multipliers uninterpretable
- Publication date:
- 2026-02-01
- OpenAlex record:
- View
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