Final answer:
In this scenario, the optimal consumption and savings for Devah are determined for both periods of her life, considering different factors.
Step-by-step explanation:
In this scenario, Devah lives for two periods: period 1 where she works and earns income, and period 2 where she is retired and earns no income. The utility over consumption in period 1 is given by the expression U(c1)=c10.5.
Her total income in period 1 is $1800, which she can either spend on consumption in period 1 (c1) or save (s). With a measure of myopia (δ) equal to 0.5, Devah's optimal consumption in period 1 is $900, her optimal private savings are $900, and her optimal consumption in period 2 is $900.
Now, considering the presence of a Social Security program that returns $180 to Devah when she retires, her optimal consumption in period 1 remains $900, her savings remain $900, and her optimal consumption in period 2 is now $1080.