I'm trying to estimate a system of equations concerning translog cost function and share equations, through IZEF using the sureg command. I have to impose symmetry and linear homogeneity in prices.
Unfortunately, once I impose the constraints, I get peculiar output, whereby some of the coefficients are omitted. The constraints also feature a strange 'o' when they appear in the output, for example:
( 2) [lnac].olnpe_a - [se]o._cons = 0
( 3) [lnac]o.lnpl_a - [sl]o._cons = 0
How can I modify the constraints so as to rectify this problem?
Unfortunately, once I impose the constraints, I get peculiar output, whereby some of the coefficients are omitted. The constraints also feature a strange 'o' when they appear in the output, for example:
( 2) [lnac].olnpe_a - [se]o._cons = 0
( 3) [lnac]o.lnpl_a - [sl]o._cons = 0
How can I modify the constraints so as to rectify this problem?