Homework Answers
constant, they don't change when the budget changes
(Utility is maximized at the bundle where MRSx,y = MRSy,z =
MRSz,x = price ratio of the goods
MRSx,y = MUx/MUy = 
MRSy,z = MUy/MUz = 
MRSz,x = MUz/MUx = 
So, ratio of all these variable depends on the price ratio and not the budget. Thus, they remain constant when the budget changes.
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