In this case, it is hard to see any clear pattern, so we need to run the
formal statistical test. To test for heteroscedasticity using White’s test,
click on the View button in the regression window and select Residual
Tests/Heteroscedasticity Tests. You will see a large number of different
tests available, including the ARCH test that will be discussed in chapter
8. For now, select the White specification. You can also select whether
to include the cross-product terms or not (i.e. each variable multiplied by
each other variable) or include only the squares of the variables in the
auxiliary regression. Uncheck the ‘Include White cross terms’ given the
relatively large number of variables in this regression