more straightforward approach and other few points

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Luca Tiberti
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more straightforward approach and other few points

Post by Luca Tiberti » Thu Sep 05, 2019 12:39 pm

Dear Yaya and team,

thank you for your interesting presentation. Here a few comments to, hopefully, further improve your study:
- The productivity variable in (3) is defined differently than in (7). This loos quite confusing
- Exclusion restrictions: I am not convinced that the variables you identified are not really related to the error term in the main equation. Please check whether in Ali et al. (from where you borrowed these variables) use the same or very related outcomes. If not, referring to this study is not a strong argument, as the variables can be good ones in their study, but not in yours.
- Similarly, the instrumental variable may actually directly affect consumption as well (there are a few studies showing this, think, for example, to the effect on consumer prices or, even better, own-consumption)
- I find your methodological approach a bit too complex (each component has its own difficulties). Complexity is not easy to be sold, so, where possible, better to use more straightforward approaches. For example, you may think to drop the “productivity” model, and directly estimate the effect of credit constraints on welfare (still through the Bourguignon et al. methodology, by then estimating the ATE and ATT across the different – endogenous – regimes). The analysis of credit constraints on productivity might actually represent a test of the impact pathways.
- Are the credit-constrained regimes built on the existing literature? Please clarify.
- The gender analysis looks weak. The control variable you intend to study is not enough. Separate by gender analyses (and the understanding of the underlying mechanisms eventually explaining differences) might be an option to improve this issue.

thanks!

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