I want to merge data from the US EPA Toxic Release Inventory (TRI) with financial databases such as Compustat? However, the only unique firm identifier in the TRI data is the D&B (DUNS) number, which Compustat does not use.
If you have used the TRI data in this way in the past, how did you merge it?
Thank you,
Tim Hart
Tim-Hart@utulsa.edu
The University of Tulsa
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