why do ls functions of vecm why do i do an ols analysis in a vecm why is there a need to do ollis regression of vecm why is there a need to do ols regression of vecm? why is there a need to do OLS regression of vecm? can r perform ols regression on a vector? why is there a need to do ols regression of vecm why is there a need to do ols regression of vecm? why is there a need to do ols regression why is ols used in r why does johansen test need to be ols why is there a need to do ols regression of vecm? when to do ols for vecm why is johansen test necessary why does the johansen test need to be run why is ols used why is there a need to do ols regression of vecm why is there a need to do ols regression of vecm? why is there a need to do ols regression of vecm why do you need for ols regression of vecm in r?