Hauptregressionsvariable

I’m ready to write a concise, neutral wiki-style article under 300 words, but I’m not sure what "Hauptregressio..." refers to. Could you confirm the intended term or provide more context? For example, do you mean:

- Hauptregression (German for "main regression") in statistics or econometrics?

- A specific concept like Hauptregressionsmodell or Hauptregressionsanalyse?

- A different term or a fictional/niche topic?

Once you confirm the exact term, I’ll generate the article accordingly.