In a two goods (x and y) world, two districts (A and B) are
identical, except the prices of good x (Px) and good y (Py) are
higher and lower in district A, respectively. Suppose two identical
individuals (i.e. same preferences and income) live in the two
districts separately and their optimal choices are interior
solutions. Evaluate the following statement: ‘The MRS at the
optimal choices of two individuals are the same’. True, false, or
uncertain? Explain your answer intuitively...