Mediation Effect The Conditions when mediation effect is true: ·1≠0. a1 D B D ·Y1≠0. ·B2≠0. 图3中介效应示意 ·B=0 or IB1<la1l Why Bi=0 is the best condition? ·Full mediation(完全中介)and partial mediation(部分中介) 11
• The Conditions when mediation effect is true: • 𝛼1 ≠ 0. • 𝛾1 ≠ 0. • 𝛽2 ≠ 0. • 𝛽1 = 0 or |𝛽1| < |𝛼1| • Why 𝛽1 = 0 is the best condition? • Full mediation (完全中介) and partial mediation (部分中介) 11 Mediation Effect
Mediation Effect The steps for mediation effect analysis: ·Baron and Kenny(I986):Causal steps approach(逐步法) Y=ao +aD+8y (1) Estimate equation(1)to explore a1. Y=B。+B,D+B2M+Ex (2) M=Yo +yD+8w (3)》 ·Estimate equation(③)to explore y1 Estimate equation(2)to explore B2 Estimate equation(2)to explore B.Full mediation and partial mediation. 12
• The steps for mediation effect analysis: • Baron and Kenny(1986): Causal steps approach (逐步法) • Estimate equation (1) to explore 𝛼1. • Estimate equation (3) to explore 𝛾1. • Estimate equation (2) to explore 𝛽2. • Estimate equation (2) to explore 𝛽1. Full mediation and partial mediation. 12 Mediation Effect