Searching for unpublished/working papers for Meta-Analysis regarding FDI and Pollution Haven

Dear community,

I am currently working on a meta-analysis for my dissertation and to avoid publication bias, I am searching for unpublished/working papers or dissertations regarding the relationship between Foreign Direct Investment (or FDI categories like e.g. Greenfield) and the Pollution Haven Theory (or Pollution Halo). If you have worked on a paper regarding this topic, I would be very happy to talk to you about a possible inclusion of your paper in the meta-analysis. Or if you have any tips regarding other forums, networks or authors to search/ask for unpublished work, I would be also very grateful.

Kind regards,
Marie Wegener