Table 1.

Candidate estimators used to estimate ${\overline{Q}}_{2,0}$. See the SuperLearner package documentation for more details (Polley vanderLaan12). SL.earth only used for V = (W₁,…,W₄).

Loss function	Method	R function
Squared error	Bayesian GLM	SL.bayesglm
	Generalized additive model	SL.gam
	Generalized linear model	SL.glm
	Generalized linear model, interactions	SL.glm.interaction
	Multivariate adaptive regression splines	SL.earth
	Sample mean	SL.mean
	Neural network	SL.nnet
	Stepwise regression	SL.step
	Forward stepwise regression	SL.step.forward
	Stepwise regression, interactions	SL.step.interaction
Weighted log	Generalized additive model	SL.gam
	Generalized linear model	SL.glm
	Generalized linear model, interactions	SL.glm.interaction
	Neural network	SL.nnet
	Recursive partitioning	SL.rpart