Parameter: λ12 Identified

Algebraic Equations:

σ11λ1212

Single Door Criterion:

{1} ⊥ {2} | {}

Parameter: λ14

Parameter: λ23 Identified

Algebraic Equations:

σ122λ2312σ1311σ22λ2311σ23

Single Door Criterion:

{2} ⊥ {3} | {1}

Parameter: λ24

Parameter: ω11 Identified

Algebraic Equations:

1111

Parameter: ω13 Identified

Algebraic Equations:

σ11σ13σ2211σ12σ23122ω1311σ22ω13

Parameter: ω22 Identified

Algebraic Equations:

σ12211σ2211ω22

Parameter: ω24

Parameter: ω33 Identified

Algebraic Equations:

122σ132σ22+2σ123σ13σ23-2σ11σ122σ232112σ22σ232124σ33+2σ11σ122σ22σ33112σ222σ33124ω33-2σ11σ122σ22ω33112σ222ω33

Parameter: ω34 Identified

Algebraic Equations:

13σ14σ2212σ14σ2312σ13σ2411σ23σ24122σ3411σ22σ34122ω3411σ22ω34

Parameter: ω44

Total Effect of X1 on X3: λ12λ23 Identified

Each Parameter Identified

Total Effect of X1 on X4: λ12λ2414 Identified

Algebraic Equations:

σ11λ12λ2411λ1414

Back Door Criterion:

{1} ⊥ {2,4} | {}

Path-specific Effect of X1 on X4: λ12λ24

Vanishing Ideal

Zero Vanishing Ideal