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The 90% Public Debt Threshold: The Rise & Fall of a Stylised Fact

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  • Balazs Egert

Abstract

This paper analyses the original Reinhart-Rogoff dataset, made public by Herndon et al. (2013), on the basis of descriptive statistics and formal econometric testing. First, based on the public debt thresholds (30%, 60% and 90%) proposed by Reinhart and Rogoff (2010), descriptive statistics reveal that real GDP growth slows considerably as the central government debt-to-GDP ratio goes beyond the 30% threshold and that no further slowdown can be observed in the data as the debt-to-GDP ratio rises above 60% and 90% during the periods 1790-2009 and 1946-2009. For the United States (1946-2009), the negative nonlinear finding completely disappears for any level of public debt, once reverse causality and influential outliers are accounted for. Looking at general (and central) government debt during the more recent period of 1960-2009 suggests that economic slowdown occurs when public debt moves above 60% or 90% of GDP. But it seems more appropriate to determine nonlinearity and the associated debt threshold endogenously. Therefore, in a second stage, we put the Reinhart-Rogoff dataset to a formal econometric test by employing nonlinear threshold models. Overall, our estimation results indicate that the nonlinear relation from debt to growth is not very robust. Taken with a pinch of salt, our results suggest, however, that there may be a tipping point at around 20% of GDP, beyond which central government debt has a negative influence on growth. Further (and greater) thresholds may exist but their magnitude is highly uncertain. For general government debt (1960-2009), the threshold beyond which negative growth effects kick in is considerably higher at about 50%. Finally, individual country estimates reveal a large amount of cross-country heterogeneity. For some countries including the United States, a nonlinear negative link can be detected at about 30% of GDP. For others, the thresholds are surrounded by a great amount of uncertainty or no nonlinearities can be established. This instability may be a result of threshold effects changing over time within countries and depending on economic conditions, not captured in our estimations. Overall, our results can be seen as a formal econometric confirmation that the 90% public debt threshold is not in the data. But our results also seem to suggest that public debt might have a negative effect on economic performance kicking in at already fairly moderate public debt levels. Furthermore, the absence of threshold effects or low estimated thresholds may not preclude the emergence of further threshold effects, especially as public debt levels are rising to unprecedentedly high levels.

Suggested Citation

  • Balazs Egert, 2013. "The 90% Public Debt Threshold: The Rise & Fall of a Stylised Fact," William Davidson Institute Working Papers Series wp1048, William Davidson Institute at the University of Michigan.
  • Handle: RePEc:wdi:papers:2013-1048
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    References listed on IDEAS

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    14. Crespo Cuaresma, Jesus & Doppelhofer, Gernot, 2007. "Nonlinearities in cross-country growth regressions: A Bayesian Averaging of Thresholds (BAT) approach," Journal of Macroeconomics, Elsevier, vol. 29(3), pages 541-554, September.
    15. Alexandru Minea & Antoine Parent, 2012. "Is High Public Debt Always Harmful to Economic Growth? Reinhart and Rogoff and some complex nonlinearities," Working Papers 12-08, Association Française de Cliométrie (AFC).
    16. Pier Carlo Padoan & Urban Sila & Paul van den Noord, 2012. "Avoiding Debt Traps: Financial Backstops and Structural Reforms," OECD Economics Department Working Papers 976, OECD Publishing.
    17. Crespo Cuaresma, Jesus & Doppelhofer, Gernot, 2007. "Nonlinearities in cross-country growth regressions: A Bayesian Averaging of Thresholds (BAT) approach," Journal of Macroeconomics, Elsevier, vol. 29(3), pages 541-554, September.
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    Cited by:

    1. Marta Gómez-Puig & Simón Sosvilla-Rivero, 2015. "“On the bi-directional causal relationship between public debt and economic growth in EMU countries”," IREA Working Papers 201512, University of Barcelona, Research Institute of Applied Economics, revised May 2015.
    2. Gheorghiţă DINCĂ & Marius Sorin DINCĂ, 2015. "Public Debt and Economic Growth in the EU Post-Communist Countries," Journal for Economic Forecasting, Institute for Economic Forecasting, vol. 0(2), pages 119-132, June.
    3. Ehrhart, Hélène & Minea, Alexandru & Villieu, Patrick, 2014. "Debt, seigniorage, and the Growth Laffer Curve in developing countries," Journal of Macroeconomics, Elsevier, vol. 42(C), pages 199-210.
    4. Oblath, Gábor & Halpern, László, 2014. "A gazdasági stagnálás "színe" és fonákja. Mivel jár együtt az exporttöbblet és az adósságcsökkenés? [The bright" and gloomy side of economic stagnation]," Közgazdasági Szemle (Economic Review - monthly of the Hungarian Academy of Sciences), Közgazdasági Szemle Alapítvány (Economic Review Foundation), vol. 0(7), pages 757-800.
    5. Panizza, Ugo & Presbitero, Andrea F., 2014. "Public debt and economic growth: Is there a causal effect?," Journal of Macroeconomics, Elsevier, vol. 41(C), pages 21-41.
    6. Sokbae (Simon) Lee & Hyunmin Park & Myung Hwan Seo & Youngki Shin, 2014. "A contribution to the Reinhart and Rogoff debate: not 90 percent but maybe 30 percent," CeMMAP working papers 39/14, Institute for Fiscal Studies.
    7. Yannis Dafermos, 2015. "The ‘other half’ of the public debt–economic growth relationship: a note on Reinhart and Rogoff," European Journal of Economics and Economic Policies: Intervention, Edward Elgar Publishing, vol. 12(1), pages 20-28, April.
    8. Besnik Fetai & Kestrim Avdimetaj & Abdylmenaf Bexheti & Arben Malaj, 2020. "Threshold effect of public debt on economic growth: An empirical analysis in the European transition countries," Zbornik radova Ekonomskog fakulteta u Rijeci/Proceedings of Rijeka Faculty of Economics, University of Rijeka, Faculty of Economics and Business, vol. 38(2), pages 381-406.
    9. Bitar, Nicholas & Chakrabarti, Avik & Zeaiter, Hussein, 2018. "Were Reinhart and Rogoff right?," International Review of Economics & Finance, Elsevier, vol. 58(C), pages 614-620.
    10. Marta Gómez-Puig & Simón Sosvilla-Rivero, 2015. "“Short-run and long-run effects of public debt on economic performance: Evidence from EMU countries”," IREA Working Papers 201522, University of Barcelona, Research Institute of Applied Economics, revised Sep 2015.
    11. Sokbae (Simon) Lee & Hyunmin Park & Myung Hwan Seo & Youngki Shin, 2014. "A contribution to the Reinhart and Rogoff debate: not 90 percent but maybe 30 percent," CeMMAP working papers CWP39/14, Centre for Microdata Methods and Practice, Institute for Fiscal Studies.
    12. Gómez-Puig, Marta & Sosvilla-Rivero, Simón, 2015. "The causal relationship between debt and growth in EMU countries," Journal of Policy Modeling, Elsevier, vol. 37(6), pages 974-989.

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    More about this item

    Keywords

    public debt; economic growth; nonlinearity; threshold effects;
    All these keywords.

    JEL classification:

    • E6 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook
    • F3 - International Economics - - International Finance
    • F4 - International Economics - - Macroeconomic Aspects of International Trade and Finance
    • N4 - Economic History - - Government, War, Law, International Relations, and Regulation

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