Talk:Breusch-Pagan test

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The page writes heteroskedasticity, but the page links to heteroscedasticity; should this be fixed?

Also, I feel tempted to add computer implementations of the test, for example, R (programming language) has a bptest function to do this test. Is this appropriate? Albmont 12:06, 10 November 2006 (UTC)

[edit] Need for improvement

The article doesn't specifically state what the test-statistic is, but says both that a chi-squared anf and F-test can be used. —Preceding unsigned comment added by Melcombe (talk • contribs) 13:03, 28 April 2008 (UTC)

[edit] vague writing

This article says:

Suppose that we estimate the equation

That is vague. The use of x₀ as a single term makes it look as if that's the y-intercept, so you might think x₁ is the slope and β is the independent variable. But it is customary that when lower-case Greek letters are used in this context, those are the unobservables to be estimated and the lower-case Latin letters are the observables. Whoever wrote this was confused and leaves the reader confused. Michael Hardy (talk) 19:24, 30 April 2008 (UTC)