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Volume 15
Issue 2
Online publication date 2019-04-11
Title Fiscal sustainability in BRICS countries: evidence from asymmetric unit root test augmented with Fourier function
Author Andrew Phiri
The study’s main focus is to demonstrate the importance of accounting for nonlinearities and unobserved structural breaks in testing for stationary in fiscal budgets. This is achieved by applying the KSS unit root tests augment with a flexible Fourier form to the fiscal budgets of BRICS counties. We find that when unit root tests do not account for structural breaks, the fiscal budgets tend to contain a unit root whereas when structural breaks are considered without accounting for nonlinearities the series are stationary. Simultaneously accounting for asymmetries and unobserved structural breaks more effectively segregates the data into stationary and nonstationary series.

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Keywords Fiscal budgets, BRICS countries, nonlinearity unit root test, Flexible Fourier approximation.
Pages 254-260
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