## Self-Check Questions

Imagine an economy in which Ricardian equivalence holds. This economy has a budget deficit of 50, a trade deficit of 20, private savings of 130, and investment of 100. If the budget deficit rises to 70, how are the other terms in the national saving and investment identity affected?

## Hint:

Ricardian equivalence means that private saving changes to offset exactly any changes in the government budget. So, if the deficit increases by 20, private saving increases by 20 as well, and the trade deficit and the budget deficit will not change from their original levels. The original national saving and investment identity is written below. Notice that if any change in the (G – T) term is offset by a change in the S term, then the other terms do not change. So if (G – T) rises by 20, then S must also increase by 20.

$\begin{array}{ccc}\text{Quantitysuppliedoffinancialcapital}& \text{=}& \text{Quantitydemandedoffinancialcapital}\\ \text{S+(M\u2013X)}& \text{=}& \text{I+(G\u2013T)}\\ \text{130+20}& \text{=}& \text{100+50}\end{array}$