Fig. 2From: Overlapping-sample Mendelian randomisation with multiple exposures: a Bayesian approachDiagram of our model and parameter settings. There are three instrumental variables (Z1,Z2,Z3) and three exposures (X1,X2,X3). Z1 is associated with X1 only. Z3 is associated with X3 only. Z2 is associated with both X2 and X3. For simplicity, we assume there is no direct associations among the exposures and the instrumental variables are mutually independentBack to article page