Fig. 2From: Public health spending in Sub-Saharan Africa: exploring transmission mechanisms using the latent growth curve mediation modelLatent linear growth modelNote. X1 to X4 represent observed data collected over four periods, t = 1, 2, 3, and 4; E1 to E4 are time-specific errors. The simple arrows depict the link between the intercept and slope of the observed variables. Double arrows depict the link between growth factors (intercept and slope). Arrows indicate the intercept loading parametersBack to article page