What is the 'Rubin Causal Model' and its relevance in causal inference?

Thank you for posing such an insightful question. It's fascinating to delve into topics like the Rubin Causal Model, especially given its profound implications in the realm of causal inference. To provide a comprehensive overview, the Rubin Causal Model, also known as the Potential Outcomes Framework, fundamentally shifts our approach to understanding cause-and-effect relationships. The cornerstone of this model lies in its conceptual framework, which posits that to estimate the causal effect of a treatment on an outcome, one must consider two potential outcomes for each unit in the study: one if the unit receives the treatment and another if it does not. However, the catch, and what makes causal inference challenging, is that we can only observe one of these outcomes for each unit...