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: λ34 Identified

Algebraic Equations:

σ132σ22λ3413σ14σ22-2σ12σ13σ23λ3412σ14σ2311σ232λ3412σ13σ2411σ23σ24122σ33λ3411σ22σ33λ34122σ3411σ22σ34

Single Door Criterion:

{3} ⊥ {4} | {1,2}

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: ω44

Total Effect of X1 on X3: λ12λ23 Identified

Each Parameter Identified

Total Effect of X1 on X4: λ12λ23λ3412λ2414 Identified

Algebraic Equations:

σ11σ122σ132σ22λ12λ23λ3411σ122σ132σ22λ12λ2411σ122σ132σ22λ14122σ132σ14σ22112σ132σ222λ12λ23λ34112σ132σ222λ12λ24112σ132σ222λ14-2σ11σ123σ13σ23λ12λ23λ34-2σ11σ123σ13σ23λ12λ24-2σ11σ123σ13σ23λ14+2σ123σ13σ14σ23+2σ112σ12σ13σ22σ23λ12λ23λ34+2σ112σ12σ13σ22σ23λ12λ24+2σ112σ12σ13σ22σ23λ14112σ122σ232λ12λ23λ34112σ122σ232λ12λ24112σ122σ232λ14-2σ11σ122σ14σ232113σ22σ232λ12λ23λ34113σ22σ232λ12λ24113σ22σ232λ14112σ14σ22σ23211σ12σ132σ22σ2411σ122σ13σ23σ24112σ13σ22σ23σ24112σ12σ232σ2411σ124σ33λ12λ23λ3411σ124σ33λ12λ2411σ124σ33λ14124σ14σ33-2σ112σ122σ22σ33λ12λ23λ34-2σ112σ122σ22σ33λ12λ24-2σ112σ122σ22σ33λ14+2σ11σ122σ14σ22σ33113σ222σ33λ12λ23λ34113σ222σ33λ12λ24113σ222σ33λ14112σ14σ222σ3311σ122σ13σ22σ34112σ13σ222σ3411σ123σ23σ34112σ12σ22σ23σ34

Path-specific Effect of X1 on X4: λ12λ23λ34 Identified

Algebraic Equations:

σ11σ122σ132σ22λ12λ23λ34122σ132σ14σ22112σ132σ222λ12λ23λ34-2σ11σ123σ13σ23λ12λ23λ34123σ13σ14σ23+2σ112σ12σ13σ22σ23λ12λ23λ3411σ12σ13σ14σ22σ23112σ122σ232λ12λ23λ3411σ122σ14σ232113σ22σ232λ12λ23λ34123σ132σ24-2σ11σ122σ13σ23σ24112σ12σ232σ2411σ124σ33λ12λ23λ34-2σ112σ122σ22σ33λ12λ23λ34113σ222σ33λ12λ23λ34124σ13σ3411σ122σ13σ22σ3411σ123σ23σ34112σ12σ22σ23σ34

Path-specific Effect of X1 on X4: λ12λ24

Total Effect of X2 on X4: λ23λ3424

Path-specific Effect of X2 on X4: λ23λ34 Identified

Algebraic Equations:

σ122σ132σ22λ23λ3412σ132σ14σ2211σ132σ222λ23λ34-2σ123σ13σ23λ23λ34122σ13σ14σ23+2σ11σ12σ13σ22σ23λ23λ3411σ13σ14σ22σ2311σ122σ232λ23λ3411σ12σ14σ232112σ22σ232λ23λ34122σ132σ24-2σ11σ12σ13σ23σ24112σ232σ24124σ33λ23λ34-2σ11σ122σ22σ33λ23λ34112σ222σ33λ23λ34123σ13σ3411σ12σ13σ22σ3411σ122σ23σ34112σ22σ23σ34

Vanishing Ideal

Zero Vanishing Ideal