Re: [R] extend summary.lm for hccm?

Hi! I am trying to estimate Engel curves using a big sample (>42,000) using lm and taking heteroskedasticity into account by using the summaryHCCM posted here by John Fox (Mon Dec 25 16:01:59 CET 2006). Having used the SIC (with MASS stepAIC) to determine how many powers to use I estimate the mo

Re: [R] extend summary.lm for hccm?

Dear John (and other readers of this mailing list), thanks for your help. It now raises two further questions, one directly related to R and probably easy to answer, the other one a little off-topic. John Fox wrote: ... (BTW, one would not normally call summary.lm() directly, but rather use