Jacek Haman2025-07-282025-07-2820243071-797310.7206/cid.3071-7973.2https://repozytorium.kozminski.edu.pl/handle/item/3723CC-BY-4.0electionselectoral systemcounterfactual analysisdemographic adjustmentmechanical effectelectionselectoral systemcounterfactual analysisdemographic adjustmentmechanical effectThe Electoral System and Election Results: The Case of the Elections to the Sejm of the Republic of PolandThe Electoral System and Election Results: The Case of the Elections to the Sejm of the Republic of PolandArticle