1\begin{tabular}{lrrrrr}2\toprule3Firms & Family & N & $\Delta$ log loss & 95\% CI & GW $p$ \\4\midrule5firmhold heldout & logistic & 10,071 & +0.0018 & [-0.0007, +0.0045] & 0.565 \\6firmhold heldout & lightgbm & 10,071 & +0.0018 & [-0.0005, +0.0042] & 0.250 \\7firmhold seen & logistic & 43,596 & +0.0011 & [-0.0015, +0.0037] & 0.560 \\8firmhold seen & lightgbm & 43,596 & +0.0019 & [+0.0005, +0.0034] & 0.033 \\9\bottomrule10\end{tabular}11