start of tests rewrite (still need to remove yields)
start of tests rewrite (still need to remove yields)

statsmodels/statsmodels,statsmodels/statsmodels,bashtage/statsmodels,statsmodels/statsmodels,bashtage/statsmodels,josef-pkt/statsmodels,josef-pkt/statsmodels,bashtage/statsmodels,josef-pkt/statsmodels,josef-pkt/statsmodels,bashtage/statsmodels,statsmodels/statsmodels,statsmodels/statsmodels,bashtage/statsmodels,bashtage/statsmodels,josef-pkt/statsmodels,josef-pkt/statsmodels,statsmodels/statsmodels