For each base regressor \(k\), compute $$\hat\theta^{PMG}_k = \frac{\sum_i w_{ik} \hat\theta_{ik}}{\sum_i w_{ik}}, \quad w_{ik} = 1 / \hat V(\hat\theta_{ik}),$$ with pooled standard error \((\sum_i w_{ik})^{-1/2}\).
.pmg_pool_lr(unit_lr)A list with lr_coef, lr_se, and the full pooled
vcov (diagonal).
A list of unit-level results from .csardl_unit_lr().