Re: [Gretl-users] Test a significant difference between two slope values

Lorenzo, Do you mean something like this? Y = b0 + b1*x + b2*(D*x) + e, Here D is a dummy variable specifying the group(s) that may have a different regression line (gender, race, etc.). If so, then yes: just estimate the model in gretl and look at the regression output for b2. Or are you talking about something else? HTH, PS From: gretl-users-bounces(a)lists.wfu.edu [mailto:gretl-users-bounces@lists.wfu.edu] On Behalf Of lorenzosmeraldi(a)libero.it Sent: Monday, September 28, 2015 9:43 AM To: gretl-users(a)lists.wfu.edu Subject: [Gretl-users] Test a significant difference between two slope values Hi, in Gretl is possibile to test (i.e: t-test) the difference between slopes of two different regression lines? Thanks. Lorenzo.