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Directed Acyclic Graphs and Causal Inference Quiz

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Questions and Answers

In Directed Acyclic Graphs (DAGs), what does the arrow pointing from D to Y signify?

U is a confounder
D causes Y (correct)
There is no relationship between D and Y
Y causes D

What is the purpose of including the unobservable U in the identification through Directed Acyclic Graphs (DAGs)?

To show that U causes D
To simplify the graph
To confuse the relationship between D and Y
To address identification concerns (correct)

In the context of Inference in OLS, what role do Directed Acyclic Graphs (DAGs) play?

They show that Y causes D
They prove heteroskedasticity
They encode relationships between variables intuitively (correct)
They help test hypotheses

How do Directed Acyclic Graphs (DAGs) contribute to hypothesis testing?

By visually representing causal relationships (D) Signup and view all the answers

What concept is specifically addressed through the use of Directed Acyclic Graphs (DAGs)?

Confounding variables (A) Signup and view all the answers

How many key steps are involved when using a DAG for identification purposes?

Four (B) Signup and view all the answers

Why is identifying colliders considered crucial in determining whether an effect is identified?

Colliders play a role in blocking certain backdoor paths (A) Signup and view all the answers

What is the main value of a DAG when it comes to modeling causality?

Providing a clear visualization of causality (C) Signup and view all the answers

Why should conditioning on colliders be avoided according to the text?

It can introduce bias into the analysis (B) Signup and view all the answers

In the context of DAGs, what is crucial to consider when determining whether to condition on a specific variable?

Whether conditioning on it blocks backdoor paths (D) Signup and view all the answers

What is the primary purpose of writing all paths between two nodes in a DAG?

To trace all possible causal connections (D) Signup and view all the answers

Why is conditioning on a variable along the path important in Directed Acyclic Graphs (DAGs)?

To block the path between D and Y (D) Signup and view all the answers

What happens when a collider in a pathway is not conditioned on in Directed Acyclic Graphs (DAGs)?

It opens up the pathway between D and Y (B) Signup and view all the answers

How does conditioning on a variable affect the relationship between D and Y in Directed Acyclic Graphs (DAGs)?

Blocks certain pathways between D and Y (C) Signup and view all the answers

What is the key point to note about the 'Back-Door' path in Directed Acyclic Graphs (DAGs)?

It is not a causal pathway (C) Signup and view all the answers

In Directed Acyclic Graphs (DAGs), what happens when D is independent of Y conditional on X?

The effect of D on Y is identified under this setup (B) Signup and view all the answers

What role does a 'collider' play in Directed Acyclic Graphs (DAGs)?

Automatically blocks pathways between variables (A) Signup and view all the answers

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