Parameter: λ12 Identified

Algebraic Equations:

σ11λ1212

Single Door Criterion:

{1} ⊥ {2} | {}

Parameter: λ14

Parameter: λ24 Identified

Algebraic Equations:

σ122λ2412σ1411σ22λ2411σ24

Single Door Criterion:

{2} ⊥ {4} | {1}

Parameter: ω11 Identified

Algebraic Equations:

1111

Parameter: ω13 Identified

Algebraic Equations:

1313

Parameter: ω14

Parameter: ω22 Identified

Algebraic Equations:

σ12211σ2211ω22

Parameter: ω23 Identified

Algebraic Equations:

σ12σ1311σ2311ω23

Parameter: ω33 Identified

Algebraic Equations:

3333

Parameter: ω34

Parameter: ω44

Total Effect of X1 on X4: λ12λ2414

Path-specific Effect of X1 on X4: λ12λ24 Identified

Algebraic Equations:

σ11σ122λ12λ24122σ14112σ22λ12λ2411σ12σ24

Vanishing Ideal

Zero Vanishing Ideal