In: Finance
IV Suppose the U.S. government began 2016 with no debt. The expenditures listed below do not include interest on debt.
2016: Spending on goods & services and transfers $4.5 trillion
tax receipts $4 trillion
What is the budget deficit? How much must the Treasury borrow?
2017: Expenditures and tax receipts both increase by 1% from the year before.
In addition, the debt incurred in 2016 has a 2% interest rate, which must be paid this year.
What is the budget deficit? How much must the Treasury borrow? What is its total debt?
2018: Spending and tax are same as 2017. Bonds issued in 2017 carry the same interest rate.
What is the budget deficit? How much must the Treasury borrow? What is its total debt?
2019: Spending is the same as 2018. But taxes increase 10% due to major expansion in macroeconomy. Bonds issued in 2018 carry the same interest rate. In addition, half of the (cumulative) Treasury bonds mature this year.
What is the budget deficit? How much must the Treasury borrow? How much in bonds must it issue?
2016
Budget Deficit = Tax receipts - Spending on goods and services and transfers
or, Budget Deficit = $4 Trillion - $4.5 Trillion = (-)$0.5 Trillion
So, the government needs to borrow $0.5 Trillion.
2017
Tax receipts = $4 Trillion + 1% x $4 Trillion = $4.04 Trillion
Spending = $4.5 Trillion + 1% x $4.5 Trillion = $4.545 Trillion
Interest on debt = $0.5 Trillion x 2% = $0.01 Trillion
Deficit = $4.04 Trillion - $4.545 Trillion - $0.01 Trillion = (-)$0.515 Trillion
Therefore, the treasury must borrow $0.515 Trillion.
Total debt = $0.5 Trillion + $0.515 Trillion = $1.015 Trillion
2018
Interest on debt = $1.015 Trillion x 2% = $0.0203 Trillion
Deficit = $4.04 Trillion - $4.545 Trillion - $0.0203 Trillion = (-)$0.5253 Trillion
Therefore, the treasury must borrow $0.5253 Trillion.
Total debt = $1.015 Trillion + $0.5253 Trillion = $1.5403 Trillion
2019
Tax receipts = $4.04 Trillion + 10% x $4.04 Trillion = $4.444 Trillion
Interest on debt = $1.5403 Trillion x 2% = $0.030806 Trillion
Debt maturity (or debt to be repaid) = $1.5403 Trillion / 2 = $0.77015
Deficit = $4.444 Trillion - $4.545 Trillion - $0.030806 Trillion - $0.77015 = (-)$0.901956 Trillion
Therefore, the treasury must borrow $0.901956 Trillion.
Total debt = $1.5403 Trillion - $0.77015 Trillion + $0.901956 Trillion = $1.672106 Trillion