## 1 Introduction  
Communication services in the 21 st century have witnessed a notable growth in the wireless market, driven by advances in long distance and satellite communication technologies. More specifically, advances in wireless technology from analogue to digital technology and IMT-2000, and again to 4G Long Term Evolution (LTE) technology have brought a shift in market priority from voice communication to data network communication. The advent of new technology has also intensified the competition in communication market to motivate firms to place greater efforts in improving service quality, whose most important factor also shifted to network quality over voice quality with the technological changes. In particular, the speed of downloads and uploads has been pinpointed by many, including the U.S. Federal Communications Commission (FCC), as the top factor determining network quality in the wireless industry.  
[PERSON] [1] classifies service quality into technical quality and functional quality, and under this classification, the technical quality of wireless communication can be understood as network quality and functional quality as customer confidence, attitude, and behavior [2]. Traditionally, the functional quality has been regarded as being more significant than technical quality in determining service quality [3]. However, with the growing importance of network quality, whether the priority of functional quality over technical quality still holds in the context of the wireless market is questionable. In a highly competitive market such as wireless communication services, identifying the most efficient area to focus resources and efforts can be critical for achieving a high business performance and good market position, and in turn, to becoming the leading firm in the market [4].  
Measurement of efficiency rating have been used in previous literature on the wireless communications market as a way to identify focal areas for wireless carriers to improve business performance and market position [5; 6]. However, most of these studies have focused on economic planning, investment section, or production in their investigations [7]. Therefore, this study proposes to investigate how technological advances in the wireless market has affected the influence of network quality versus service quality on business performance. That is, utilizing the well-supported method of measuring efficiency, this study analyzes which between the technical and functional quality of the wireless communication service determines the management efficiency of wireless carriers.  
In doing so, this study applies Gronroos [1] classification to define technical quality as the data network performance and functional quality to the service provided to customers. Accordingly, the efficiency for technical quality can be described as \"network quality efficiency\" while the efficiency for functional quality can be expressed as \"service quality efficiency\". To examine the relationship among network quality, service quality, and management efficiencies, three hypotheses are tested using bootstrap DEA to see the correlation among the distribution of efficient decision making units (DMUs) for each quality to management efficiency. The three-year data for representative U.S. wireless carriers, namely, Verizon wireless, AT & T, Sprint Nextel, and T-mobile, are used as the decision making units for analysis.  
The composition of this study is as follows. Section 2 outlines previous discussions on service quality and network quality in the wireless industry from existing research to draw the input and output factors for this study. Section 3 explains the research model and methodology of research while Section 4 presents the results of analysis. The summary of the results and the implications and limitations of this study are given in Section 5.