I see chapter 15 in GARP's book - Correlations and Copulas has been merged with Volatility now in the study planner. It seems Copulas is now removed, I have 2019 GARP study material so just wanted to confirm if Copulas has now been removed this year.
What does BP stands for?
Also what i understood for homosked is that the error terms show constant variance. Are we saying there is a correlation between these error terms and the regressor under our consideration? And this being an assumption of least squares.
Thanks David. I feel my concepts are not very clear here which is why i am unable to connect the dots. According to my understanding errors are nothing but the difference between actual (Y) and predicted (Y^) independent variable.
Homosked - is when errors have a constant variance so are we...
weighted least squares (WLS) estimator: If the errors are heteroskedastic, then OLS is no longer BLUE. If the heteroskedasticity is known (i.e., if the conditional variance of given is known up to a constant factor of proportionality) then an alternate estimator exists with a smaller variance...