Displaying 2 results from an estimated 2 matches for "_iinfl_1".
2004 Nov 11
1
polr probit versus stata oprobit
Dear All,
I have been struggling to understand why for the housing data in MASS
library R and stata give coef. estimates that are really different. I also
tried to come up with many many examples myself (see below, of course I
did not have the set.seed command included) and all of my
`random' examples seem to give verry similar output. For the housing data,
I have changed the data into numeric
2004 Nov 11
0
ROracle SQL length limitation
...Value Std. Error t value
Low|Medium -0.2998 0.0762 -3.9371
Medium|High 0.4267 0.0764 5.5850
Residual Deviance: 3479.689
AIC: 3495.689
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In Stata
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. use housing.dta
. xi: oprobit Sat i.Infl i.Type i.Cont [fw=Freq]
i.Infl _IInfl_1-3 (naturally coded; _IInfl_1 omitted)
i.Type _IType_1-4 (naturally coded; _IType_1 omitted)
i.Cont _ICont_1-2 (naturally coded; _ICont_1 omitted)
Iteration 0: log likelihood = -1824.4388
Iteration 1: log likelihood = -1739.9254
Iteration 2: lo...