Hi all,

Behavior of restrictions with patterns like “b[1, 1] + -2*b[2, 1] = 0” is strange. In the following MWE, the restricted coefficients differ by exactly 1.0 when restrictions are defined in the “bugged” way:

open greene13_1.gdt

# set up system

system name="Grunfeld"

    equation I_GM const C_GM F_GM

    equation I_WE const C_WE F_WE

end system

# restriction w/bug

restrict "Grunfeld"

    b[1,1] + -1.0*b[2,1] = 0.0

end restrict

estimate "Grunfeld" method=sur --iterate

# restriction w/o bug

restrict "Grunfeld"

    b[1,1] - 1.0*b[2,1] = 0.0

end restrict

estimate "Grunfeld" method=sur –iterate

This a bug or a feature? Thanks for looking into this.

Best,

Igor

Igor Pozdeev

+41786120928

www.igorpozdeev.me