Breusch-Pagan test for heteroskedasticity

[Jonathan Morley]

What is the long way to do the Breusch-Pagan test for heteroskedasticity.
I know of "hettest" but i've seen theres another way by obtaining the squared residuals after estimating the model by OLS (Don't know what comes after)

Any help is appreciated,thanks

[Mohammed Shakar]

There is no other way

[Richard Williams]

Appendix A on p. 9 of the following may have what you want.

https://www3.nd.edu/~rwilliam/stats2/l25.pdf