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st: Midas


From   [email protected]
To   [email protected]
Subject   st: Midas
Date   Thu, 05 May 2011 10:17:42 +0200

Dear all,

I use Stata/SE 11.2 for Windows (32-bit)- Born 30 Mar 2011
and I have installed the user written-command package midas from
http://fmwww.bc.edu/RePEc/bocode/m (module for meta-analytical integration of diagnostic
test accuracy studies)


When I run the midas command

midas tp fp fn tn

with this data:

tp	fp	fn	tn
17	27	1	47
18	3	2	11
21	5	1	13
44	3	22	15
17	13	0	12
56	28	1	16
23	16	0	14
79	9	23	26
24	1	6	17
28	21	3	24
66	38	12	63


at the end I get: Hessian has become unstable or asymmetric
r(504);

Can You help me please how to resolve this problem?

Thanks for your consideration



Mario Petretta
Dipartimento di Medicina Clinica Scienze Cardiovascolari e Immunologiche
Facoltà di Medicina e Chirurgia
Università di Napoli Federico II
081 - 7462233


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