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Asymmetric effect of energy price on commodity price: New evidence from NARDL and time frequency wavelet approaches

Mohammad Ashraful Ferdous Chowdhury (), Muhammad Meo (), Ajim Uddin and Md. Mahmudul Haque

Energy, 2021, vol. 231, issue C

Abstract: The growing literature on volatility spillover and shock transfer between energy and food prices largely ignored the nonlinearities in the volatility patterns. This study evaluates the nonlinear interaction and co-movement between world energy prices and world food prices, including their individual components. Using monthly data from 1992 to 2017, we used Nonlinear Autoregressive Distributed Lag (NARDL) to investigate the short-term and long-term dynamics of food prices concerning the positive and negative shocks in energy prices. The result indicates that the impact of energy prices on food prices is asymmetric. A positive change in energy prices has a higher and long-lasting effect on agriculture commodity than a negative change. The wavelet coherence analysis suggests that a statistically significant lead-lag relationship exists. Both wheat and corn prices lead by energy prices. The relationship is rather long-run than the short-run, as we find the most dominant frequency is the 16th month and remains positive until the 64th month. Interestingly, we also observe that in the long-run, rice price lead oil and coal price. For the robustness test, we consider fertilizer and diesel as the control variables and find a similar asymmetric relationship with food prices.

Keywords: Energy and food price asymmetry; Agricultural commodity price; Price level; NARDL; Wavelet coherence (search for similar items in EconPapers)
JEL-codes: C1 E31 Q02 Q16 Q4 (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:231:y:2021:i:c:s0360544221011828

DOI: 10.1016/j.energy.2021.120934

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