Nội dung text 7.3. Identify Effect in Causal Diagram.pdf
pacmann.io © 2022 – Pacmann AI 31 Identify Causal Effect in Causal Diagram
pacmann.io © 2022 – Pacmann AI 32 ● By categorizing the path we can formalize ways to estimate the effect of interest ● Identification of causality: closing bad paths/back doors and leaving open good paths/front doors. What Can We Do with Paths: Identify Causal Effect
pacmann.io © 2022 – Pacmann AI 33 ● We want to know whether a person came out through the front door or not. ● In order to ensure a person came out through the front door, we can close the back door by ○ Adjusting or controlling the back door (known as back door method), or ○ Use a method that singles out the front door (known as front door method) What Can We Do with Paths: Identify Causal Effect
pacmann.io © 2022 – Pacmann AI 34 ● Steps to identify causal effect by controlling back door: 1. List all the paths 2. Determining the back door paths 3. Controlling variables to close back door paths ● By doing so, we isolate the variation of interest and identify the causal effect. What Can We Do with Paths: Identify Causal Effect