As with Equation 12 for the second stage moderationmodel, Equation 22 shows that the second stage of theindirect effect of X on Y depends on Z, as indicated by theterm aX3(bM20bMZ20Z). However, Equation 22 addsmoderation of the direct effect of X on Y, as captured bythe term (bX20bXZ20Z). The intercept in Equation 22also varies across levels of Z because of the terms bZ20Zand bMZ20Z.