Migrationstock estimation

[Lagg911]

Hi
I am trying to estimate the Austrian (from where I am coming so please excuse my bad English) migration using the standard macro migration model.

ln(mst) = ß1*ln(w_f/w_h) + ß2*ln(w_h) + ß3*ln(e_h) + ß4*ln(e_f) + a

Where mst denotes the ratio of the stock of migrants to the population in the home country, w_f and w_h(gdp) (w_f/w_h gdp_ratio) wages, e_f(zielemp) and e_h(emp) the employment rate in the foreign (host) and the home country and a is a time invariant effect (distance + free movement)

I got panel data of 16 countries but just for a short time (2002-2009)

My problem is now; that I am a Newbie at eviews (my experience is limited to same small ARMA-models) and if try to estimate the model I get insufficient number of observation and i don't know why.

I would glad if someone could offer me some help, or a link to a good tutorial.

Thank you (btw I am using EViews 7)

Sorry, the equation should be
log(mst) log(gdp_ratio) log(gdp) log(emp) log(zielemp) distanz free

[startz]

You might want to include the exact equation you've estimated, either in the post or in the workfile (or both)