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  • Controlling for time specific effect

    I have a dataset with 800 crowdfunded technological projects (each of which crowdfunded in a particular year), plus a nunmber of variables per project. The time window is 2009-2018. One of the reviewers of the paper asked us to control for time-specific effects. We used robust regression by Verardi & Croux (2009). Is it reasonable/feasible?

  • #2
    Francesco:
    welcome to this forum.
    I guess the reviewer is asking for a new categorical predictor in the right-hand side of your regression equation:
    Code:
    i.year
    See -help fvvarlist- on how to create categorical variables and interactions in an effective way.
    After the regression, you can test the joint statistical signifcance of -i.year- typing:
    Code:
    testparm(i.year)
    Kind regards,
    Carlo
    (Stata 16.0 SE)

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    • #3
      Thanks a lot, Carlo!

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