RE: Unreasonable VSS estimate

From: Bachman, William <bachmanw@globomax.com> Subject: RE: Unreasonable VSS estimate Date: Mon, 7 May 2001 13:34:56 -0400 Try constraining your parameters (not the values of the parameters). This is probably easiest if you use TRANS5. Decide the order of the magnitudes of the exponentials (KA, ALPHA, BETA) that you think is correct and then define the parameters in terms of increments of the other parameters. e.g. if you think KA <ALPHA < BETA then. KA=THETA(1)*EXP(ETA(1)) ALPHA=KA+THETA(2)*EXP(ETA(2)) BETA=ALPHA+THETA(3)*EXP(ETA(3)) William J. Bachman, Ph.D. GloboMax LLC 7250 Parkway Dr., Suite 430 Hanover, MD 21076 Voice (410) 782-2212 FAX (410) 712-0737 bachmanw@globomax.com