How to cluster standard errors

I have a cross-sectional dataset with M&A acquirers and study deal performance. If I want to cluster standard errors on a SIC (Standard Industrial Classification) level when I do OLS, how can do this?

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Hello. Did you find a way for this? I have the same problem and I'm badly stuck! Please help if possible. Thank you.

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Asked:

on 17 Apr 2020

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on 17 May 2020

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