Hi, I would like to know if anyone has any idea of how to run an OLS with constraints? thank you Soyoko ______________________________________ Ms. Soyoko Umeno Graduate Research Assitant for the Illinois-Missouri Biotechnology Alliance (IMBA) at http://www.imba.missouri.edu/ Ph.D. Student at the Department of Agricultural and Consumer Economics at the University of Illinois at Urbana-Champaign Office Phone: 217-333-3417 or 217-333-0364 Fax: 217-244-4817 Mailing Address: 1301 W. Gregory Dr. MC710, Urbana, IL 61801