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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Pareto chart of the standardized effects of independent variables on ETF/DEA flux ratio values (α = 0.05). The red dotted line represents the lowest significant value of standardized effect at α = 0.05.