Taleb, Mushtaq and Khalid, Ruzelan and Emrouznejad, Ali and Ramli, Razamin (2023) Environmental Efficiency under Weak Disposability: An Improved Super Efficiency Data Envelopment Analysis Model with Application for Assessment of Ports Operations Considering Netzero. Environment, Development and Sustainability, 35. pp. 1-28. ISSN 1387-585X

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Abstract

Due to ports have rapidly been expanding, air pollution resulted from port operations has expansion and become a persistent concern for environmentalist and policy makers. The objective of this paper is to measure the environmental efficiency of ports in Korea. The main characteristic of the environmental efficiency assessment problem is that undesirable output of carbon dioxide (CO2) emissions and exogenous fixed input of the terminal area of ports should concurrently be considered. By analysing the impacts of the exogenous fixed input and undesirable outputs on decision making units (DMUs) performance, a super efficiency slacks-based measure in data envelopment analysis (SE-SBM-DEA) approach is proposed. The proposed approach consists of two models are slacks-based measure (SBM) model and super efficiency SBM (SE-SBM) model. The models effectively discriminate between efficient and inefficient ports, and rank their efficiencies. To restrict any decreases or increases in the fixed input levels, the slacks of fixed inputs are removed from the target functions and their relevant constraints of the proposed approach. In addition, the undesirable outputs are formulated according to the weak disposability assumption, so that they can only be reduced with the reduction of certain desirable outputs. Hence, its slack should also be removed from the SBM and SE-SBM models. As a result, the scalar measures of the models only deal with the discretionary inputs and desirable outputs of a DMU being evaluated. We examine the applicability of the proposed approach, using real data, for 19 ports in Korea

Item Type:	Article
Uncontrolled Keywords:	Data envelopment analysis; Exogenous fixed inputs; CO2 emissions, Undesirable outputs; Sustainable development; Super efficiency DEA
Subjects:	Q Science > QA Mathematics
Divisions:	School of Quantitative Sciences
Depositing User:	Mdm. Sarkina Mat Saad @ Shaari
Date Deposited:	04 Jul 2024 03:41
Last Modified:	04 Jul 2024 03:41
URI:	https://repo.uum.edu.my/id/eprint/31007

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