In the panday1995/2020-carbon_allocation, I find the LTSM prediction is used in DEA modeling as inputs, would you like to give some clues about the reason to choose RNN preprocessing on data?
I quickly go through all three papers you mention, but I don't find the related explanations.
Choi, Yongrok, Haohao Wang, Fan Yang, and Hyoungsuk Lee. 2021. “Sustainable Governance of the Korean Freight Transportation Industry from an Environmental Perspective.” Sustainability 13 (11): 6429.
Choi, Yongrok, Fan Yang, and Hyoungsuk Lee. 2020. “On the Unbalanced Atmospheric Environmental Performance of Major Cities in China.” Sustainability 12 (13): 5391.
Yang, Fan, Yongrok Choi, and Hyoungsuk Lee. 2021. “Life-Cycle Data Envelopment Analysis to Measure Efficiency and Cost-Effectiveness of Environmental Regulation in China’s Transport Sector.” Ecological Indicators 126: 107717.