Bailey-Makeham Model Estimation
-------------------------------

     ^bailey^ outcome varlist [^if^ exp] [^in^ range] [^=^exp] [^, dead^(varname)
	^interval^(# or varname) ^trace^ ^autofix^(#) ^nocons^ ^rescale^
	^rhomax^(#) ^lambda^(#)
	^fxalpha^(varlist) ^fxgamma^(varlist) ^fxdelta^(varlist)
	^svalpha^(varlist) ^svgamma^(varlist) ^svdelta^(varlist)

fits a survival model with hazard function

	alpha * exp(-gamma*t) + delta

where ^alpha^, ^gamma^, and ^delta^ are all exponentiated linear functions of
the varlist.  The outcome is the time to failure or censoring.  The option
^dead^ names a variable that describes whether the observation is a death.
If the ^dead^ option is not specified, all observations are presumed to be
deaths.

Other options work as follows:

    ^trace^     Includes a trace of the parameter values at each step.

    ^nocons^    Specifies that the constant term is not to be included
		automatically.

    ^rescale^   Indicates that the weights are to be rescaled to sum to
		the number of observations.

    ^maxiter^   The maximum number of iterations permitted.

    ^autofix^   Causes parameter values to be fixed in the maximization step
		if they appear to be headed to infinity.  The value is the
		maximum change in likelihood per observation at which this test
		will be applied.

    ^rhomax^    The maximum multiple of the Marquart that will be attempted,
		based on a local quadratic approximation.

    ^lambda^    The parameter that describes the (starting) height of the
		ridge that is used if needed in the Marquardt method.

Each of the variables in the varlist applies for each structural parameter
(^alpha^, ^gamma^, or ^delta^) unless specified as fixed.  To fix a parameter
at its starting value, specify the varname in ^fxalpha()^, ^fxgamma()^, or
^fxdelta()^.

Starting values are defined by specifying the options ^svalpha(^svlist^)^,
^svgamma(^svlist^)^, or ^svdelta(^svlist^)^.  The argument "svlist" is a series
of statements of the form variable=#.  If the starting values are not
specified, they start at 0, except for the constant term.

See also: ^help mpredict^, ^help msurface^.