

   HHaarrrriissoonn--MMccCCaabbee--TTeesstt

        raintest(formula, T,  data=list())

   AArrgguummeennttss::

    formula: a symbolic describtion for the model to be tested

          T: split the model at time T

       data: an optional data frame containing the variables in
             the model.  By default the variables are taken
             from the environment which 'hmctest' is called
             from

   DDeessccrriippttiioonn::

        `hmctest' performs the Harrison-McCabe-Test against
        heteroskedasticity.

   VVaalluuee::

        A list with class `"htest"' containing the following
        components:

   statistic: the value of the test statistic.

    p.value: not yet implemented, NA.

     method: a character string indicating what type of test
             was performed.

   data.name: a character string giving the name(s) of the
             data.

   AAuutthhoorr((ss))::

        Torsten Hothorn <hothorn@amadeus.statistik.uni-dort-
        mund.de>

   RReeffeerreenncceess::

        Kraemer, W., Sonnberger, H. (1986): The linear regres-
        sion model under test

   SSeeee AAllssoo::

        `lm'

   EExxaammpplleess::

        x <- c(1:30);
        err <- c(rnorm(10,0,1), rnorm(20,0,10));
        y <- x^2 + err;
        formular <- y ~ x;
        hmc <- hmctest(formular);

