Why is it important to identify the source of heteroscedasticity when correcting for this problem?

The source of heteroscedasticity is important to identify so that the correct corrective action can be taken. Different sources of heteroscedasticity often require different solutions. If the source is due to outliers in the data, then outliers might need to be removed, or some form of correction may be required. If the source is due to biased data, then data needs to be collected to properly calculate variance in addition to a correlation test. Proper corrective action is essential to ensure the accuracy of the results that are obtained from the data.