Comments (1)
Hi @n-ihlo, grf doesn't store the value of the criterion it uses to determine splits. Causal forest does CART splits on an appropriate "pseudo-outcome". All the information needed to reconstruct this pseudo-outcome is available in a fit forest. If you want to learn more about the criterion causal forest use, you could have a look at the grf paper which explains how CART splitting can be paired with influence functions to target heterogeneity in a variety of statistical parameters, such as treatment effects.
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