Second, longitudinal data would have been useful to determine whether the effect of
the independent variables is short term or enduring. Longitudinal data might reveal
how changes in some independent variables affect SCM practices. A revised model that
examines changes in antecedents and consequence may yield more interesting results
since a dynamic formulation eliminates the influence of variables whose levels remain
comparatively constant (e.g. social capital might fall into this category as it takes time
to develop). Moreover, a lagged relationship between changes over time helps clarify
the causal relationship in the model.