Ricardian Equivalence

The proposition and its origins

Ricardian equivalence holds that it makes no difference to the economy whether government spending is financed by taxes or by bonds. It is named after the nineteenth-century British economist David Ricardo, who argued in his 1820 "Essay on the Funding System" that paying for a war by taxes or by debt is equivalent in theory, but doubted the equivalence in practice because people are not that rational. James Buchanan (1976) and O'Driscoll (1977) therefore noted that Ricardo himself was a "non-equivalence" theorist. The modern formulation is Robert Barro's (1974) "Are Government Bonds Net Wealth?" If the government cuts taxes today and issues bonds, it must raise taxes later to pay principal and interest, so rational households save the tax cut rather than spend it. Bonds are thus not net wealth to households, higher private saving exactly offsets lower government saving, and national saving, interest rates and aggregate demand are unchanged. This directly contradicts the Keynesian view that tax cuts boost consumption.

Required assumptions

Barro's result requires strong assumptions. First, households must have rational expectations and understand the government's budget constraint. Second, even if future taxes fall on their children's generation, parents must have "dynastic" altruism, leaving bequests that reflect their children's welfare; Barro used this to resolve the problem of finite lifetimes. Third, households must be able to borrow and save freely, without liquidity constraints. Fourth, taxes must be lump-sum; distortionary taxes such as income taxes change behavior differently depending on timing. Fifth, the path of government spending must be unchanged. Barro (1989) argued equivalence can be a good approximation even if these assumptions are imperfect, while Bernheim (1989) countered that under realistic conditions deficits reduce national saving.

Critiques and evidence

Olivier Blanchard (1985) built a model in which finite lives and weak bequest motives let part of future taxes escape the current generation, making bonds net wealth, and Poterba and Summers (1987) calculated that this effect could be sizable. Liquidity-constrained households are likely to spend tax cuts immediately. Empirical findings are mixed: Seater (1993) concluded equivalence is generally a good approximation, but Ricciuti's (2003) survey found results vary by method and country. Shapiro and Slemrod (2003) reported that most respondents to the 2001 U.S. tax rebate said they would mainly save it or pay down debt, while Johnson, Parker and Souleles (2006) found households spent 20 to 40 percent of rebates on nondurables within three months. Gregory Mankiw (2000) proposed a "savers–spenders" model with both forward-looking savers and spenders who consume current income. Like the policy-ineffectiveness proposition, the theorem is a leading example of how expectations can weaken policy effects.

FAQ

What is Ricardian equivalence in simple terms?

If the government cuts taxes now and borrows, and people know the debt must be repaid with future taxes and save the tax cut, consumption does not rise.

Does Ricardian equivalence hold in reality?

Most economists think not fully: because of liquidity constraints, finite lifetimes and short-sighted spending, evidence shows a substantial share of tax cuts is spent.

Sources reviewed: 2026-10-26

References

1. Barro, R. J. (1974). Are government bonds net wealth? Journal of Political Economy, 82(6), 1095–1117.
2. Ricardo, D. (1820). Essay on the funding system. In Supplement to the Encyclopaedia Britannica. Edinburgh.
3. Buchanan, J. M. (1976). Barro on the Ricardian equivalence theorem. Journal of Political Economy, 84(2), 337–342.
4. O'Driscoll, G. P., Jr. (1977). The Ricardian nonequivalence theorem. Journal of Political Economy, 85(1), 207–210.
5. Barro, R. J. (1989). The Ricardian approach to budget deficits. Journal of Economic Perspectives, 3(2), 37–54.
6. Bernheim, B. D. (1989). A neoclassical perspective on budget deficits. Journal of Economic Perspectives, 3(2), 55–72.
7. Seater, J. J. (1993). Ricardian equivalence. Journal of Economic Literature, 31(1), 142–190.
8. Blanchard, O. J. (1985). Debt, deficits, and finite horizons. Journal of Political Economy, 93(2), 223–247.
9. Poterba, J. M., & Summers, L. H. (1987). Finite lifetimes and the effects of budget deficits on national saving. Journal of Monetary Economics, 20(2), 369–391.
10. Shapiro, M. D., & Slemrod, J. (2003). Consumer response to tax rebates. American Economic Review, 93(1), 381–396.
11. Johnson, D. S., Parker, J. A., & Souleles, N. S. (2006). Household expenditure and the income tax rebates of 2001. American Economic Review, 96(5), 1589–1610.
12. Ricciuti, R. (2003). Assessing Ricardian equivalence. Journal of Economic Surveys, 17(1), 55–78.
13. Mankiw, N. G. (2000). The savers–spenders theory of fiscal policy. American Economic Review, 90(2), 120–125.