A government cuts taxes and increases spending, running a large fiscal deficit. According to the twin deficits mechanism, what is the expected effect on the current account, and through what channels does it operate?
AThe current account improves because fiscal stimulus raises domestic production, boosting exports
BThe current account deteriorates because fiscal expansion raises income (increasing imports) and domestic interest rates (attracting foreign capital inflows that equal a current account deficit by identity)
CThe current account is unaffected because private saving automatically rises to offset the government deficit (Ricardian equivalence)
DThe current account improves as higher interest rates make domestic assets attractive, strengthening the exchange rate and boosting net exports
The twin-deficit mechanism runs through two channels: (1) income effects — fiscal expansion puts more money in households' hands, some of which is spent on imports, worsening the trade balance; (2) capital account effects — higher domestic interest rates attract foreign capital inflows, which by the current account identity equal a current account deficit. Option C describes Ricardian equivalence, which if fully operative would break the twin deficit relationship — but empirically, full Ricardian offset is rare. Option D has the interest rate direction right but the current account implication backwards: capital inflows finance a current account deficit, not a surplus.
Question 2 Multiple Choice
A country has been running twin deficits for several years, accumulating significant foreign-held debt. Foreign creditors suddenly reassess the country's creditworthiness and stop rolling over loans. What is the likely adjustment path?
AThe current account smoothly shifts toward surplus over several years as exports gradually increase
BThe exchange rate depreciates sharply, domestic interest rates spike, and the current account must rapidly swing toward balance — often through a painful recession
CThe fiscal deficit widens further as the government must borrow more domestically to replace foreign financing
DCapital controls automatically activate, preventing further outflows and maintaining the existing deficit
This is a sudden stop — an abrupt reversal of capital inflows. When foreign financing dries up, the current account must immediately stop running a deficit (since the deficit was being financed by those inflows). Rapid current account adjustment requires sharp currency depreciation (making exports cheaper and imports more expensive) and high domestic interest rates (to attract whatever domestic and remaining foreign capital is available). Both adjustments are recessionary — depreciation raises import prices (inflation) and high interest rates choke investment. This vulnerability is why persistent twin deficits attract IMF attention even when they appear temporarily sustainable.
Question 3 True / False
If households fully anticipate that today's fiscal deficit means higher future taxes and increase their saving proportionally, the twin deficit relationship would not emerge.
TTrue
FFalse
Answer: True
This is the Ricardian equivalence hypothesis. If households see a deficit-financed tax cut as merely a tax deferral — borrowing today that must be repaid with future taxes — they save the entire windfall rather than consuming it. National saving (private + public) remains unchanged, so no gap opens between domestic saving and investment, and no current account deficit emerges. In practice, full Ricardian equivalence is empirically rare: households are liquidity-constrained, have finite planning horizons, or discount future taxes. But partial offsets are common, which is why the twin-deficit relationship is strong in some episodes and weak in others.
Question 4 True / False
A country with a large fiscal deficit will necessarily also run a current account deficit.
TTrue
FFalse
Answer: False
The national accounting identity shows that a fiscal deficit reduces public saving and therefore national saving, creating pressure for a current account deficit. But the relationship is not mechanical. Private saving can offset the fiscal deficit (partial Ricardian effect), leaving national saving unchanged. Additionally, if the fiscal deficit funds productive investment that raises the economy's capacity, foreign investors may increase inflows to fund that investment — widening the current account deficit — but for different reasons than overconsumption. The twin-deficit relationship is an empirical regularity in many open economies, not an accounting law. Japan, for instance, has run persistent fiscal deficits with current account *surpluses* because of very high private saving rates.
Question 5 Short Answer
Explain why a country running persistent twin deficits is vulnerable to a sudden stop, and why the composition of fiscal spending matters for the severity of that vulnerability.
Think about your answer, then reveal below.
Model answer: Twin deficits mean the economy consumes beyond its means and borrows from abroad to fund both government spending and imports. Sustainability depends on foreign lenders continuing to roll over this debt. If they stop — a sudden stop — the current account must rapidly swing to balance, requiring sharp currency depreciation and rising interest rates, usually triggering recession. The composition of fiscal spending determines the future growth path: deficits funding productive investment (infrastructure, human capital) raise future output and the economy's ability to service debt. Deficits funding transfers and consumption do not, making the debt harder to service and the sudden-stop adjustment more severe.
The intertemporal framing is key: a current account deficit is borrowing against the future. The question is whether the economy will be productive enough in the future to service that debt. Fiscal deficits that fund consumption don't improve future productive capacity, so the implied debt path is less sustainable. This is why development economists distinguish 'productive' from 'unproductive' government borrowing, and why bond markets price sovereign debt partly based on how fiscal deficits are being used, not just their size.