A multi-stage framework for predicting Olympic medal trends and evaluating strategic impacts, integrating stacking ensemble forecasting, Lasso regression for event importance, and a DID model for coaching influence.一个用于预测奥运奖牌趋势和评估战略影响的多阶段分析框架。该框架集成了奖牌预测堆叠模型、赛事重要性Lasso回归及精英教练影响的双重差分模型。