Four Decades of Airline Productivity and Efficiency Studies: A Review and Bibliometric Analysis

Airline productivity and efficiency have remained an area of tremendous interest among both academics and industry analysts since the Airline Deregulation Act of 1978 was enacted in the United States. This paper provides a bibliometric analysis of airline productivity and efficiency studies during the period from 1979 to 2020. The results show that the  Journal of Air Transport Management ,  Transportation Research Part A , and  Transportation Research Part E  were the top three outlets preferred for publications in this area during the study period, and productive authors were likely to produce influential works. Research interest in airline productivity and efficiency has spread to encompass more diversified geographical regions over time, and new researchers from a broad range of fields continue to become interested in this field of research. Data envelopment analysis and stochastic frontier analysis are shown to be the most popular methods used by researchers, and studies are increasingly attempting to incorporate undesirable outputs, such as carbon emissions, flight delays and accidents, into the measurement and analysis of airline performance. The results from this study can provide guidance for future research issues and directions.