when is regression stationary what is the dependent variable in ols regression which variables must be in an ols regression? why does a dependent variable have to be stationary does ols need to be stationary for regressive results? how to regress ols why would you regress if the dependent variable was stationary can you use an indicator variable for a stationary interval how does a dependent variable work in ols regression how to apply ols regression to time series in stocks does stationary time series regress? how do you correct ols regression which variable should be stationary do the indicators have to be stationary how do you regress a time series on a stock do ols regressions work when stationary is ols regressive? does a static indicator have to be stationary when ols regression do ols regresses dependencies ols on stationary series