If the Errors Are Heteroskedastic, Then

question 2

Multiple Choice

If the errors are heteroskedastic, then

• A)the OLS estimator is still BLUE as long as the regressors are nonrandom.
• B)the usual formula cannot be used for the OLS estimator.
• C)your model becomes overidentified.
• D)the OLS estimator is not BLUE.

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Definitions:

Alcohols

Organic compounds characterized by one or more hydroxyl (-OH) groups attached to a carbon atom.

IR Absorption

A technique in spectroscopy where molecules absorb infrared light, causing vibrational transitions, used to identify chemical compounds.

IR Absorption

The process by which molecules absorb infrared radiation at specific wavelengths corresponding to vibrations of molecular bonds.

Characteristic IR Stretches

Characteristic Infrared (IR) Stretches are specific absorption bands in IR spectroscopy that correspond to the vibrations of molecular bonds, helping to identify functional groups within a molecule.