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Article
Publication date: 12 December 2019

Yong Joo Lee and Seong-Jong Joo

Data envelopment analysis (DEA) is based on the production possibility set that involves the process of converting resources or inputs to outputs. Accordingly, most DEA models…

Abstract

Purpose

Data envelopment analysis (DEA) is based on the production possibility set that involves the process of converting resources or inputs to outputs. Accordingly, most DEA models include endogenous variables and need an additional step to find the influence of exogenous variables on the process. The purpose of this paper is to examine the relationship between the efficiency scores of DEA and the exogenous variables using truncated regression analysis with double bootstrapping along with two additional methods.

Design/methodology/approach

First, the authors employ DEA for benchmarking the comparative efficiency of the health care institutes. Next, the authors run and compare truncated, ordinary least square (OLS) and Tobit regression analysis using the double bootstrapping algorithm for finding the influence of exogenous variables on the efficiency of the health care institutes.

Findings

The authors confirmed the amount of bias for the Tobit and OLS regression models, which was caused by serially correlated errors. Accordingly, the authors chose results from the truncated regression model with double bootstrapping for examining the influence of exogenous or environment variables on the efficiency scores.

Research limitations/implications

The study includes cross-sectional data on health care institutes in the state of Washington, USA. Collecting data in various states or regions over time is left for future studies.

Practical implications

In this study, three exogenous variables such as Medicaid revenues, locations of health care institutes and ownership types are significant for explaining the relationship between the efficiency scores and a group of the exogenous variables. Managers and policy makers need to pay attention to these variables along with endogenous variables for promoting the sustainability of the health care institutes.

Originality/value

The study demonstrates the usefulness of the truncated regression analysis with double bootstrapping for confirming the relationship between the efficiency scores of DEA and a group of exogenous variables, which is rare in the DEA literature.

Details

Benchmarking: An International Journal, vol. 27 no. 1
Type: Research Article
ISSN: 1463-5771

Keywords

Article
Publication date: 3 October 2016

Kathleen Overton, Seong-Jong Joo and Philipp A. Stoeberl

There are elevated debates on the role of teacher unions on the effectiveness of education in the USA. The purpose of this paper is to examine if the unionization of education has…

Abstract

Purpose

There are elevated debates on the role of teacher unions on the effectiveness of education in the USA. The purpose of this paper is to examine if the unionization of education has an impact on the comparative performance of public education in the USA.

Design/methodology/approach

The authors classify states into two groups such as highly unionized states and less unionized states for comparing their performance differences. The analyses consist of two stages. First, the authors apply data envelopment analysis (DEA) to the key performance indicators of the groups. Next, the authors use statistical analysis for confirming the statistical significance of the performance differences that may exist between two groups.

Findings

The authors have confirmed the adverse impact of unionization on public education using DEA models and non-parametric rank-sum tests. However, the authors are cautious for generalizing the finding due to the limitations described in the research limitation section.

Research limitations/implications

The finding is limited within the selection of the variables and model specification and requires additional studies using different variables and models. The authors hope that the study motivates researchers to conduct further studies in this area.

Originality/value

Major contributions of the study include a novel approach for measuring the performance of primary and secondary schools at the state level by classifying and choosing less or highly unionized states and suggesting insights for improvements.

Details

Benchmarking: An International Journal, vol. 23 no. 7
Type: Research Article
ISSN: 1463-5771

Keywords

Article
Publication date: 15 September 2021

Hokey Min, C. Christopher Lee and Seong-Jong Joo

To identify sources of the success and failure of COVID-19 control measures and develop best-practice public health policy in mitigating the spread of COVID-19, this paper aims to…

Abstract

Purpose

To identify sources of the success and failure of COVID-19 control measures and develop best-practice public health policy in mitigating the spread of COVID-19, this paper aims to evaluate the efficiency of various combinations of government COVID-19 control measures among OECD countries. This paper also identifies which factors critically influence the efficiency of COVID-19 control measures.

Design/methodology/approach

This paper employed two-stage network SBM (slacks-based measure of efficiency) models with variable returns-to-scale and constant returns-to-scale, respectively, among various forms of data envelopment analysis (DEA) models. As a post hoc analysis, the authors used Tobit regression for examining the causal relationship between a nation's cultural dimensions and its COVID-19 control measure's efficiency scores.

Findings

The authors found that the pervasive less individualistic and higher uncertainty avoiding culture positively influenced the efficient control of COVID-19 outbreaks since such a culture helped the government impose its mandatory COVID-19 control measures without people's strong resistance to those measures.

Originality/value

Many public health policymakers are wondering why COVID-19 control measures are not effective in coping with the COVID-19 outbreaks. This paper helps the government find the most efficient combination of COVID-19 controls measures for curbing the spread of the stubborn coronavirus. This paper is one of the first attempts to identify pandemic risk mitigation factors from a cultural perspective.

Details

Benchmarking: An International Journal, vol. 29 no. 6
Type: Research Article
ISSN: 1463-5771

Keywords

Article
Publication date: 30 March 2021

Mansik Hur, Seong-Jong Joo and Jaeyoung Cho

The purpose of this study is to provide the benchmarking guideline to improve managing maintenance man-hour in producing sorties of fighter jet aircraft in the Korean Air Force by…

Abstract

Purpose

The purpose of this study is to provide the benchmarking guideline to improve managing maintenance man-hour in producing sorties of fighter jet aircraft in the Korean Air Force by measuring relative efficiency of aircraft in a fleet.

Design/methodology/approach

Using actual operational data from 2014 to 2018, this paper measures the relative efficiencies of aircraft by data envelopment analysis (DEA) model. To analyze the efficiencies across different operational units and among aircraft with different attributes, non-parametric statistical techniques and tobit regression are employed.

Findings

The overall management of maintenance man-hour turns out to be 63.2% efficient compared to the best practice. Operational unit possessing aircraft with different configurations shows the poorest performance implying efficiency depends on the complexity of job processes. Identification of aircraft on the best-practice frontier indicates the efficiency is closely related with the reliability of components and the age of aircraft.

Practical implications

Performance of aircraft maintenance has a tremendous impact on military readiness, utilization of work force, and the quality and safety of flight operations. This study confirmed there exists plenty of room for performance enhancement and presents a reference to find a balance in the performances of maintenance practices across different installations as well as among different types of aircraft.

Originality/value

Application of DEA to engineering systems has been limited in literature, especially in military operations. Thus, this study presents meaningful guidelines to which fleet manager can refer to when establishing strategic maintenance plans to balance the utilization of manpower.

Details

International Journal of Quality & Reliability Management, vol. 39 no. 1
Type: Research Article
ISSN: 0265-671X

Keywords

Article
Publication date: 20 November 2020

Thomas O'Neal, Hokey Min, Daniel Cherobini and Seong-Jong Joo

The authors employed the three different versions (Charnes–Cooper–Rhodes, Banker–Charnes–Cooper and slack-based measure of efficiency) of data envelopment analysis (DEA) to…

Abstract

Purpose

The authors employed the three different versions (Charnes–Cooper–Rhodes, Banker–Charnes–Cooper and slack-based measure of efficiency) of data envelopment analysis (DEA) to evaluate the comparative efficiency/inefficiency of aircraft maintenance performance during the previous 41 months in United States Air Force (USAF). As a complimentary tool, the authors also adopted Tobit regression analysis to identify factors affecting efficiencies and inefficiencies.

Design/methodology/approach

This paper aims to measure the relative efficiency of maintenance performances for a type of USAF aircraft in an effort to enhance aviation safety and combat readiness.

Findings

Through this study, the authors have two noteworthy findings. These are (1) an increased number of “cannibalization” (extracting necessary parts from the existing aircraft) practices tended to reduce maintenance efficiency; (2) The number of mission-capable aircraft turned out to be the most important factor for maintenance performance efficiency.

Originality/value

This paper is one of the first studies on aircraft maintenance that considered popular but neglected cannibalization practices as a new variable for assessing the maintenance efficiency. In addition, this paper is one of the few studies that performed a post-ad hoc analysis as a follow-up to DEA analysis.

Details

International Journal of Quality & Reliability Management, vol. 38 no. 6
Type: Research Article
ISSN: 0265-671X

Keywords

Article
Publication date: 2 May 2017

Yong Joo Lee, Seong-Jong Joo and Hong Gyun Park

The purpose of this paper is to measure the comparative efficiency of 18 Korean commercial banks under the presence of negative observations and examine performance differences…

Abstract

Purpose

The purpose of this paper is to measure the comparative efficiency of 18 Korean commercial banks under the presence of negative observations and examine performance differences among them by grouping them according to their market conditions.

Design/methodology/approach

The authors employ two data envelopment analysis (DEA) models such as a Banker, Charnes, and Cooper (BCC) model and a modified slacks-based measure of efficiency (MSBM) model, which can handle negative data. The BCC model is proven to be translation invariant for inputs or outputs depending on output or input orientation. Meanwhile, the MSBM model is unit invariant in addition to translation invariant. The authors compare results from both models and choose one for interpreting results.

Findings

Most Korean banks recovered from the worst performance in 2011 and showed similar performance in recent years. Among three groups such as national banks, regional banks, and special banks, the most special banks demonstrated superb performance across models and years. Especially, the performance difference between the special banks and the regional banks was statistically significant. The authors concluded that the high performance of the special banks was due to their nationwide market access and ownership type.

Practical implications

This study demonstrates how to analyze and measure the efficiency of entities when variables contain negative observations using a data set for Korean banks. The authors have tried two major DEA models that are able to handle negative data and proposed a practical direction for future studies.

Originality/value

Although there are research papers for measuring the performance of banks in Korea, all of the papers in the topic have studied efficiency or productivity using positive data sets. However, variables such as net incomes and growth rates frequently include negative observations in bank data sets. This is the first paper to investigate the efficiency of bank operations in the presence of negative data in Korea.

Details

Benchmarking: An International Journal, vol. 24 no. 4
Type: Research Article
ISSN: 1463-5771

Keywords

Article
Publication date: 2 December 2019

Yacan Wang, Jason Anderson, Seong-Jong Joo and Joseph R. Huscroft

The purpose of this paper is to investigate the relationship between the repurchase intention of a customer and his/her perception of various aspects of an e-tailer’s product…

3384

Abstract

Purpose

The purpose of this paper is to investigate the relationship between the repurchase intention of a customer and his/her perception of various aspects of an e-tailer’s product return process, such as leniency, fairness and quality of the return process.

Design/methodology/approach

This research focuses on these aspects through the expectation disconfirmation theoretical lens, looking at the relationship between expectations shaped by the product return policy and the repurchase intention. This research collects data using a survey approach and analyzes it using structural equation modeling.

Findings

It was found that perceived return policy leniency, perceived fairness of the return experience and perceived quality of the return experience are important and supporting factors that influence a customer’s intention to be a return customer to e-tailers. Perceived leniency was found to not only be the most influential factor for return purchase intention but it also significantly impacted the perceived fairness and the quality of the return process. As a result, perceived leniency of the return policy had a “halo” effect on the other factors.

Practical implications

This suggests that the majority of an e-tailer’s effort should be expended determining a return policy and experience that is widely perceived as lenient as this will overall improve customer perception of the return process and increase repurchase intention.

Originality/value

This research extends research on lenient policy within the growing e-tailer sector by examining the return experience of the customer and subsequent repurchase intention based on multiple factors.

Details

Industrial Management & Data Systems, vol. 120 no. 1
Type: Research Article
ISSN: 0263-5577

Keywords

Article
Publication date: 13 February 2017

Seong-Jong Joo, Hokey Min and Carlo Smith

The purpose of this paper is to help shippers determine a negotiation yardstick for transportation price and formulate wise transportation outsourcing strategies by examining the…

1567

Abstract

Purpose

The purpose of this paper is to help shippers determine a negotiation yardstick for transportation price and formulate wise transportation outsourcing strategies by examining the presence of freight rate differentials for shippers and identifying their main causes. This paper also develops a framework for benchmarking freight rates based on the actual data.

Design/methodology/approach

This paper proposes an additive dummy regression model to determine a statistical significance in shipping charges between different shippers. Unlike the traditional least square analysis, the proposed model is designed to avoid a biased assessment of the impact of an explanatory variable.

Findings

Through a series of empirical data analysis and hypothesis tests, the authors discovered that the fixed portion (minimum base charge) of shipping charges differed depending on the shipper’ individual contract, while the variable portion (fuel or accessorial charge) of shipping charges remained the same regardless of the shipper’s individual contract. As such, shippers who are unaware of flexible but unpredictable transportation pricing practices and unprepared for freight rate negotiation can suffer from higher shipping costs as compared to their peers. Thus, the authors conclude that the success of transportation outsourcing, carrier selection, and freight rate negotiation strategies tends to rest on the shipper’s ability to understand transportation cost structures and then determine the benchmark freight rate considered “fair” and “reasonable” for a given service.

Originality/value

This paper is one of the first to examine shipping cost differentials between different shippers and determine what causes such differentials. In doing so, this paper attempted to assess the potential impact of freight rate negotiation and carrier selection strategies on shippers’ transportation costs in current deregulatory environments where shippers were given a greater freedom to negotiate freight rates with carriers and an increased opportunity to save their transportation costs.

Details

The International Journal of Logistics Management, vol. 28 no. 1
Type: Research Article
ISSN: 0957-4093

Keywords

Content available
Article
Publication date: 19 September 2023

Matthew D. Roberts, Christopher T. Price and Seong-Jong Joo

This research aims to understand how organizational workplace meetings surrounding the COVID-19 pandemic impacted logistics Airmen across the United States Air Force and how these…

Abstract

Purpose

This research aims to understand how organizational workplace meetings surrounding the COVID-19 pandemic impacted logistics Airmen across the United States Air Force and how these meetings impacted their risk seeking behavior on social media.

Design/methodology/approach

This survey research tested an extended Planned Risk Information Risk Seeking Model (PRISM) with organizational meetings as an antecedent to determine if current meetings influenced an Airman's perceived behavioral control, attitude toward seeking, subjective norms, knowledge sufficiency and intention to seek information regarding COVID-19.

Findings

Results of the CFA showed that the expanded PRISM model had good model fit. Additionally, using a custom dialog PROCESS macro in SPSS, it was found that perceptions of existing meetings were directly, positively related to attitude toward seeking, subjective norms and perceived behavioral control, and indirectly related to knowledge sufficiency threshold and information seeking. Theoretical and managerial implications are discussed.

Originality/value

This research adds to the limited body of knowledge of crisis communication and effectively expands the PRISM model to include an antecedent that helps explain information seeking during times of uncertainty.

Details

Journal of Defense Analytics and Logistics, vol. 7 no. 1
Type: Research Article
ISSN: 2399-6439

Keywords

Article
Publication date: 7 August 2017

Seong-Jong Joo, Philipp A. Stoeberl, Kun Liao and Ke Ke

The purpose of this paper is to identify the efficiency scores of branches and districts, the sources of inefficiency for branches and projections of variables for inefficient…

Abstract

Purpose

The purpose of this paper is to identify the efficiency scores of branches and districts, the sources of inefficiency for branches and projections of variables for inefficient branches. It measures the comparative performance of branches of a credit union for internal benchmarking.

Design/methodology/approach

The paper measures the performance of 35 branches of a credit union in the USA and suggests managerial insights. Data envelopment analysis is used for measuring the relative performance of the branches and districts of the credit union. The paper also compares performance differences among the districts using non-parametric statistical analyses.

Findings

Parts of the findings indicated that branches should focus on cost containment by reducing operating expenses and increasing their loan balances. In addition, districts were operated in different market conditions, which were evidenced by scale efficiency. The major contributions of the study are filling the void of benchmarking studies at a branch level in the credit union sector, suggesting a framework for internal benchmarking, and providing practical insights to managers of credit unions. The framework of this study can be applied to similar financial institutions with minor revisions.

Research limitations/implications

The limitation of this study is found in the use of cross-sectional data, which is mainly due to the sensitivity of information disclosure of the credit union.

Practical implications

The paper includes implications for the development of benchmarking studies at a branch level in the credit union sector.

Originality/value

This paper fulfills an identified need to study how to identify source of inefficiencies so as to further improve the efficiency of branches.

Details

Benchmarking: An International Journal, vol. 24 no. 6
Type: Research Article
ISSN: 1463-5771

Keywords

1 – 10 of 25