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Panel LM unit root tests with level and trend shifts

Author

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  • Lee, Junsoo
  • Tieslau, Margie

Abstract

This paper considers a Lagrange multiplier (LM) based panel unit root test that allows for heterogeneous structural breaks in both the intercepts and slopes of a series. We note that many popular time series variables are likely to exhibit changing means and/or trends over time. Given that the usual tests will depend on the nuisance parameters indicating the locations of the trend breaks, we adopt a transformation procedure that makes our new panel unit root tests invariant to the nuisance parameters. To illustrate the importance of the power gain provided by our test, we examine the convergence hypothesis using relative ratios of per capita health care expenditures in 20 OECD countries. Our results provide evidence that the convergence hypothesis is supported.

Suggested Citation

  • Lee, Junsoo & Tieslau, Margie, 2019. "Panel LM unit root tests with level and trend shifts," Economic Modelling, Elsevier, vol. 80(C), pages 1-10.
    • Handle: RePEc:eee:ecmode:v:80:y:2019:i:c:p:1-10
    DOI: 10.1016/j.econmod.2017.11.001
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    Cited by:

    1. Kashour, Mohammad, 2023. "A step towards a just transition in the EU: Conclusions of a regression-based energy inequality decomposition," Energy Policy, Elsevier, vol. 183(C).
    2. Saadet Kasman & Adnan Kasman, 2021. "Convergence in obesity and overweight rates across OECD countries: evidence from the stochastic and club convergence tests," Empirical Economics, Springer, vol. 61(2), pages 1063-1096, August.
    3. NguyenHuu, Tams & Karaman Örsal, Deniz Dilan, 2020. "A new and benign hegemon on the horizon? The Chinese century and growth in the Global South," Economics - The Open-Access, Open-Assessment E-Journal (2007-2020), Kiel Institute for the World Economy (IfW Kiel), vol. 14, pages 1-35.
    4. Khang Yi Sim & Siok Kun Sek, 2024. "Unveiling the asymmetric energy-growth nexus in top oil-importing and exporting countries: The common correlated effects approach," Energy & Environment, , vol. 35(2), pages 539-568, March.
    5. Ekonomou, George & Halkos, George, 2023. "Is tourism growth a power of environmental‘de -degradation’? An empirical analysis for Eurozone economic space," Economic Analysis and Policy, Elsevier, vol. 77(C), pages 1016-1029.
    6. Tommaso Colozza & Emilio Barucci, 2021. "European financial systems through the crisis: Patterns and convergence," Review of International Economics, Wiley Blackwell, vol. 29(5), pages 1451-1485, November.
    7. Ali, Adnan & Ramakrishnan, Suresh & Faisal, Faisal & Ghazi H Sulimany, Hamid & Bazhair, Ayman Hassan, 2022. "Stock market resource curse: The moderating role of institutional quality," Resources Policy, Elsevier, vol. 78(C).
    8. Arčabić, Vladimir & Kim, Kyoung Tae & You, Yu & Lee, Junsoo, 2021. "Century-long dynamics and convergence of income inequality among the US states," Economic Modelling, Elsevier, vol. 101(C).
    9. Corakci, Aysegul & Omay, Tolga, 2023. "Is there convergence in renewable energy deployment? Evidence from a new panel unit root test with smooth and sharp structural breaks," Renewable Energy, Elsevier, vol. 205(C), pages 648-662.
    10. Fritz, Marlon, 2019. "Steady state adjusting trends using a data-driven local polynomial regression," Economic Modelling, Elsevier, vol. 83(C), pages 312-325.
    11. Kassouri, Yacouba & Altıntaş, Halil, 2020. "Commodity terms of trade shocks and real effective exchange rate dynamics in Africa's commodity-exporting countries," Resources Policy, Elsevier, vol. 68(C).
    12. Amin, Sakib & Jamasb, Tooraj & Nepal, Rabindra, 2021. "Regulatory reform and the relative efficacy of government versus private investment on energy consumption in South Asia," Economic Analysis and Policy, Elsevier, vol. 69(C), pages 421-433.
    13. George Ekonomou & George Halkos, 2024. "Expanding the tourism energy growth nexus: an empirical analysis within the Eurozone," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 26(11), pages 27585-27605, November.
    14. Xie, Zixiong & Chen, Shyh-Wei & Hsieh, Chun-Kuei, 2021. "Facing up to the polysemy of purchasing power parity: New international evidence," Economic Modelling, Elsevier, vol. 98(C), pages 247-265.
    15. James E Payne & Junsoo Lee, 2024. "Global perspective on the permanent or transitory nature of shocks to tourist arrivals: Evidence from new unit root tests with structural breaks and factors," Tourism Economics, , vol. 30(1), pages 67-103, February.
    16. Nazlioglu, Saban & Lee, Junsoo, 2020. "Response surface estimates of the LM unit root tests," Economics Letters, Elsevier, vol. 192(C).

    More about this item

    Keywords

    Panel unit root tests; LM test; Structural breaks; Trend breaks;
    All these keywords.

    JEL classification:

    • C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General
    • C15 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Statistical Simulation Methods: General
    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes

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