It is often of interest to assess how much of the effect of an exposure on a response is mediated through an intermediate variable. However, systematic approaches are lacking, other than assessment of ...

To assess the direct and indirect effect of an intervention, multilevel 2-1-1 studies with intervention randomized at the upper (class) level and mediator and outcome measured at the lower (student) ...

Theoretically and also logically, trade costs here exist as mediator variables in the co-agglomeration of the two sectors, e.g., producer services and manufacturing sectors. A mediator variable, also ...