Individual A has UA(XA,YA)=lnXA+2YA and has $500. PX=5 and PY =10.
(a) Find the optimum. Show that it is indeed the maximum.
(b) PX=10. Find the new optimum.
(c) Calculate the substitution and income effects in units of Y associated with this change in price.
(d) Graph your answers in (a), (b) and (c) on the same graph.