Algorithm 2

1. For $b=1,2,\dots ,B:$

1.1. Sample a data set $D_b$ from the original data D via parametric or nonparametric bootstrapping.

1.2. Learn the BN, ${\mathit{g}}_b=(V,E_b)$ from $D_b$.

2. Estimate the arc strength, defined as follows:

$\widehat{p_i}=E(e_i|D)\approx {\displaystyle \frac{1}{B}\sum _{b=1}^B{\mathbb{N}}_{\{e_i\in E_b\}}P({\mathit{g}}_b|D).}$