In: Economics
min (2c1,c2), m1=800000 m2=0, 20% interest
rate
how much will be consumed in each period?
We have the utility function as 
 . The first period constraint would be as 
 , for s be savings. The second period constraint would be as
 , for r be the interest rate. Since we have 
 , the combined constraint would be as 
 or 
 . For the given values, we have 
 or 
 .
Since the utility curve is L-shaped, ie similar to a Leontiff
production function, the usual slope equality or Lagrange's process
cannot be used to find the utility maximizing combination.
Actually, the utility maximizing combination would be where the
corner/kink of the L-shaped curve exists, which would be where
 . For the utility maximizing combination of consumption be
 or 
 , putting this in the budget constraint, we have 
 or 
 or 
 , and since 
 or 
 , we have 
 or 
 . The savings would be 
 or 
 .
Hence, the consumption in first period would be 300000, and the consumption in the second period would be 600000 (= 500000 saved and 100000 as the 20% interest on the savings).