Testing explosive bubbles with time-varying volatility: The case of Spanish public debt
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Esteve García, Vicente; Prats Albentosa, María A.
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Aquest document és un/a article, creat/da en: 2023
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In this paper the dynamics of the Spanish public debt-GDP ratio is analysed during the period
1850–2021. We use recent procedures to test for explosive bubbles in the presence under time-
varying volatility (Harvey et al., 2016; Harvey et al., 2019, 2020; Kurozumi et al., 2022) in
order to test the explosive behavior of Spanish public debt over this long period. We extend
previous analysis of Esteve and Prats (2022) where assume constant unconditional volatility in the underlying error process. |
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