Re: [Gretl-users] A question on squares()

On Sun, 10 Jan 2016, oleg_komashko(a)ukr.net wrote: > Dear Sven, > Gretl supplies 2 possibilities to > get cross products (besides doing it by hand) > square() and list1^list2 > suppose we have something like this > wage = beta_0+......+beta_i*age*(D_gender=0) +beta_j*age*(D_gender=1) > i.e. we want to understand whether wage depends on age differently > for different gender > While it is easy to create all one needs in the example above,, > in case of many levels square() will give nothing, > and list1^list2 will give too much. > Additionally, for, example stata have option > for, say x,c*d.i where d.i can have 3 or more values > Objections, in my opinion, should include > evidence why stata is wrong here Dear Oleh, the "xi:" construct in stata has its pros and cons. What we do is work with lists, which makes everything different. For example, we have the += and -= operators, which they don't have. They are not wrong, nor are we. It's just a different mindset. If you like stata better, please please please use stata. ------------------------------------------------------- Riccardo (Jack) Lucchetti Dipartimento di Scienze Economiche e Sociali (DiSES) Università Politecnica delle Marche (formerly known as Università di Ancona) r.lucchetti(a)univpm.it http://www2.econ.univpm.it/servizi/hpp/lucchetti ------------------------------------------------------- _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users