Cong, Lin William; Feng, Guanhao; He, Jingyu; He, Xin - National Bureau of Economic Research - 2022
We develop a new class of tree-based models (P-Tree) for analyzing (unbalanced) panel data utilizing global (instead of local) split criteria that incorporate economic guidance to guard against overfitting while preserving interpretability. We grow a P-Tree top-down to split the cross section of...