Return to ChangeLog CVS log

Up to [Local Repository] / imach / src

Annotation of imach/src/ChangeLog, revision 1.1

1.1     ! brouard     1: 2003-03-28    <brouard@BROUARD>
        !             2: 
        !             3:        * imach.c (Module): In version up to 0.92 likelihood was computed
        !             4:        as if date of death was unknown. Death was treated as any other
        !             5:        health state: the date of the interview describes the actual state
        !             6:        and not the date of a change in health state. The former idea was
        !             7:        to consider that at each interview the state was recorded
        !             8:        (healthy, disable or death) and IMaCh was corrected; but when we
        !             9:        introduced the exact date of death then we should have modified
        !            10:        the contribution of an exact death to the likelihood. This new
        !            11:        contribution is smaller and very dependent of the step unit
        !            12:        stepm. It is no more the probability to die between last interview
        !            13:        and month of death but the probability to survive from last
        !            14:        interview up to one month before death multiplied by the
        !            15:        probability to die within a month. Thanks to Chris
        !            16:        Jackson for correcting this bug.  Former versions increased
        !            17:        mortality artificially. The bad side is that we add another loop
        !            18:        which slows down the processing. The difference can be up to 10%
        !            19:        lower mortality.
        !            20: 
        !            21: 2002-05-30    <brouard@BROUARD>
        !            22: 
        !            23:        * 
        !            24: 
        !            25:        * imach.c (Module): Add correlation matrix of one-step
        !            26:        probabilities and covariance matrix
        !            27: