2005 #2
2007 #3
3-03 
3-05
3-12
3-14


If this is not enough, you might start looking at this: http://www.uio.no/studier/emner/sv/oekonomi/ECON4120/h11/undervisningsmateriale/Wk38_inf_ec_problem.pdf

I will probably assign it for later.