I am attempting to run cem with an ordinal treatment variable that has four
values. I get the following error message:
imbalance(): 3258 <tmp>[1,1] found where void required
<istmt>: - function returned error
r(3258);
A previous reply to someone who also got this error message said to update
cem because there was a bug with the imb function.
I updated and now recieve this message:
NOTE: Treatment has must have only 2 levels to compute distance and
weights. In addition, k2k cannot be used.
Does this mean cem cannot be used with more than 2 treatments? Actually I
have a continuous treatment but I recoded it to a variable with four
levels.
Thanks!
Erik
--
Erik Cleven, PhD
Assistant Professor
Department of Politics
Saint Anselm College
100 Saint Anselm Drive
Manchester, NH 03102-1310
E-mail: ecleven(a)anselm.edu
Office Phone: (603) 222-4119
Cell phone: (603) 867-8732