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  • instrumental variable (IV) including a moderating variable and interaction term

    Dear reader,

    For my robustness tests, I also have to include a 2SLS IV test. My main results are from the following regression command:

    reg ROA i.Law##c.ESG Size Leverage sales_growth PPE i.Industry_n i.year, robust

    where Law is the moderating variable that represents Legal legislation (common v.s. civil law) and ESG the ESG score ranging from 0-100. Now I am struggling on what command for the 2SLS to use. I have added a IV which is the Industry-year average ESG composite score. Without using the interaction term, I used the following command for 2SLS that used to work:

    ivregress 2sls ROA Size Leverage sales_growth PPE Industry_n year (ESG = ESG_average), robust

    I hope that there is someone that can tell me how to run the 2SLS with an interaction term like I have.

    Thanks in advance!
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