An object of class SCM (inherits from R6) of length 42.
References
J. Helske, S. Tikka, J. Karvanen (2021). Estimation of causal effects with
small data in the presence of trapdoor variables,
Journal of the Royal Statistical Society Series A, 184(3), 1030-1051,
http://doi.org/10.1111/rssa.12699