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how to estimate Type I, Type III SS

Dear Federico and Kum-Hoe,

The Anova function in the car package will compute "Type II" or "Type III"
tests (with the former as the default); anova() computes "Type I"
(sequential) tests. Be careful with the contrast coding for Type III tests.

Regards,
 John

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John Fox
Department of Sociology
McMaster University
Hamilton, Ontario
Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox 
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