TY - JOUR ID - 84150 TI - Weak Disposability of Input and Output in a Nonparametric Production Analysis JO - Iranian Economic Review JA - IER LA - en SN - 1026-6542 AU - Kordrostami, Sohrab AU - Amirteimoori, Alireza AU - Seihani Parashkouh, Fateme AU - Mahboubi, Morassa AU - Jahani Sayyad Noveiri, Monireh AD - Department of Mathematics, Lahijan Branch of Islamic Azad University, Lahijan, Iran AD - Department of Applied Mathematics, Rasht Branch of Islamic Azad University, Rasht, Iran Y1 - 2021 PY - 2021 VL - 25 IS - 3 SP - 551 EP - 565 KW - Data Envelopment Analysis KW - DMU KW - Efficiency KW - Production Possibility Set KW - Weak disposability DO - 10.22059/ier.2021.84150 N2 - In some production processes, unlike traditional data envelopment analysis (DEA), decision-making units (DMUs) consume widely used inputs since increasing them is more favorable for improving efficiency. Plastic wastes and rotten fruits are two instances of widely used inputs for recycling factories. In this paper, weak disposability of inputs will be presented with non-uniform profit factors for inputs, and then the model will be extended to cases that consume normal and widely used inputs, and produce desirable and undesirable outputs, simultaneously. Due to the nonlinear form of the final model, a linearization method is presented to provide a linear structure of the technology. A directional distance function approach, including weakly disposable inputs and outputs, is introduced to deal with widely used inputs and undesirable outputs. Finally, the approach will be tested by applying it to some domestic sewage treatment plants in China. Results show the proposed approach can discriminate between DMUs in a rational way and with less computational effort and also it can be used for the efficiency analysis when widely used inputs and undesirable outputs are presented. UR - https://ier.ut.ac.ir/article_84150.html L1 - https://ier.ut.ac.ir/article_84150_8156b86de5635bd649baebf2f546953e.pdf ER -