Weighted index of graph efficiency improvements for by-production technology and its application to the Indian coal-based thermal power sector

Sushama Murty () and Resham Nagpal ()
Additional contact information
Sushama Murty: Jawaharlal Nehru University (JNU)
Resham Nagpal: National Institute of Public Finance and Policy (NIPFP)

Journal of Productivity Analysis, 2025, vol. 63, issue 3, No 8, 315 pages

Abstract: Abstract In contrast to conventional output-based efficiency indexes that hold input-levels fixed, a graph index of efficiency-improvements (EIs) is derived for a by-production technology by optimizing a weighted average of EIs in input and good and bad-output directions. Under the by-production approach, EIs in the input directions are non-positively related to EI in the good-output direction and non-negatively related to EI in the bad-output direction. The optimal configurations of EIs balances between the gains for the graph efficiency index from increase in EI in the emission direction and the loss from reduction in EI along the good-output direction when there are EIs in the input directions. A comprehensive classification of possible optimal configurations of EIs is provided. The optimal configuration that materializes depends crucially on the weights given to EIs in the input and output directions. Even with zero weights given to EIs in all the input directions, the optimal configuration can involve EIs in the directions of the emission-causing inputs. The optimal configurations of graph EIs for the plants in the Indian coal-based thermal power sector are studied.

Keywords: Emission-generating technologies; By-production technologies; Output-based efficiency indexes; Weighted graph efficiency indexes; Efficiency improvements (search for similar items in EconPapers)
JEL-codes: D24 Q40 Q50 (search for similar items in EconPapers)
Date: 2025
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://link.springer.com/10.1007/s11123-024-00750-2 Abstract (text/html)
Access to full text is restricted to subscribers.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:kap:jproda:v:63:y:2025:i:3:d:10.1007_s11123-024-00750-2

Ordering information: This journal article can be ordered from
http://www.springer. ... cs/journal/11123/PS2

DOI: 10.1007/s11123-024-00750-2

Access Statistics for this article

Journal of Productivity Analysis is currently edited by William Greene, Chris O'Donnell and Victor Podinovski

More articles in Journal of Productivity Analysis from Springer
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().