Open Access Research Article CC BY 4.0 Published 5 January 2026

Bottleneck Diagnosis in International Automotive Sales Funnels Using Gradient Boosting Trees: Evidence from Cross-Regional Team Efficiency Evaluation

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  1. 1 Chinese Academy of Social Sciences

* Corresponding author: Ziren Zhou · judynov@outlook.com

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Copyright © 2026 The Author(s). Published by Southern United Academy of Sciences.
This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.