Estimating demand curve in the Korean VoIP telecommunications market

The VoIP (Voice over Internet Protocol) market in Korea is showing rapid growth since domestic carriers initiated the service in 2006. These carriers are now seeking new revenue sources from various convergence services and are increasing investment into VoIP. In particular, local exchange carriers (LECs), formerly reluctant to invest in technologies that would cannibalize their local telephone revenue, have started to invest in VoIP, in recognition of the current convergence of media and the telecommunications industry, as well as in the face of intensifying competition. In this study, we determined that VoIP call rates and landline telephony call rates were the most important factors affecting VoIP call demand, in addition to network externality. We also verified that landline telephony is no longer a supplement to VoIP, but rather, a substitute that has considerable influence on VoIP call demand. Empirical evidence is expected to be considered in policy decision making on current issues in the IT industry, such as access prices or competitiveness assessment. The current empirical analysis on the Korean VoIP industry and the adherence to lessons learned from policy enforcement should provide valuable information to countries seeking to develop their own VoIP industries, as well as to businesses developing new strategies based on the VoIP market.     

Conjoint analysis of demand for IP telephony: the case of Japan

With the recent diffusion of broadband (BB) services, Internet protocol (IP) telephony is expected to spread significantly in Japan. This article investigates the demand for IP telephony by using conjoint analysis. Projecting IP telephony demand also contributes to Japanese info-communication policy discussions. Two points are made. First, IP telephony is still currently considered an optional supplement or an add-on service option of high-speed BB Internet access services in Japan rather than a close substitute of existing plain old telephone service (POTS). At this point, we find little evidence that many households will promptly forsake their fixed line service for IP telephony. Second, we conclude that the key condition for the proliferation of IP telephony is the complete guarantee of quality of service (QoS), including voice quality, number portability, fax usage and emergency access, comparable to or exceeding that of existing POTS.     

Is fixed-mobile substitution strong enough to de-regulate fixed voice telephony? Evidence from the Austrian markets

In this paper, we estimate own-price elasticities for fixed network voice telephony access and national calls services for private users as well as cross-price elasticities to mobile services using time series data from 2002 to 2007 from the Austrian markets. Using instrumental variable estimates and considering cointegration, we find that access is inelastic while calls are elastic. We conclude that the retail market for national calls of private users can probably be deregulated due to sufficient competitive pressure from mobile. Access-substitution on the other hand does not seem to be strong enough to justify de-regulation.     

Fixed-to-mobile call substitution and telephony market definition in Korea

An appropriate market definition is critical in most antitrust cases. In practice, antitrust authorities define economic markets in a deterministic manner with little concern about the risk involved in defining markets incorrectly. In contrast, this article proposes a probabilistic market definition method by which antitrust authorities can establish a statistical confidence level for their intended market-definition judgments. As an application, we examine the likelihood that the fixed-line and mobile telephony services in Korea can compete in the same economic market. Combining critical loss analysis with a hierarchical Bayes model for stated preference data, we find some evidence for the separation of the fixed-line and mobile telephony markets in present-day Korea. After discussing certain possible regulation biases for market definition, we predict that the two markets will converge in the near future as the mobile price premium continues to decrease.     

Ownership unbundling of natural gas transmission networks: empirical evidence

The European Commission has intensively examined the mandatory separation of natural gas transmission from production and services. However, economic theory is ambiguous on the price effects of vertical separation. In this paper, we empirically analyze the effect of ownership unbundling of gas transmission networks, considered to be the strongest form of vertical separation, on the level of end-user prices. Therefore, we apply different dynamic estimators such as system GMM and the bias-corrected least-squares dummy variable estimator to an unbalanced panel consisting of 18 EU countries over 19 years, allowing us to avoid the endogeneity problem and to estimate the long-run effects of regulation. We introduce a set of regulatory indicators as market entry regulation, ownership structure, vertical separation and market structure, as well as account for structural and economic country specifics. Among the different estimators, we consistently find that ownership unbundling has no impact on natural gas end-user prices, while the more modest legal unbundling reduces them significantly. Furthermore, third-party access, market structure and privatization show significant influence, with the latter leading to higher prices.     

Calling party pays or receiving party pays? The diffusion of mobile telephony with endogenous regulation

This paper analyzes the impact on mobile telephony diffusion patterns of the two predominant payment regimes, calling party pays (CPP) and receiving party pays (RPP), for mobile termination services. By applying instrumental variable techniques to panel data we account for a possible interdependency of penetration rates and regulatory interventions. For this purpose we use data on political and institutional factors to instrument endogenous regulatory decisions. We conclude from our empirical analysis that there is no significant impact of either RPP or CPP on penetration rates. Therefore an application of RPP in order to obviate regulation of termination fees would be feasible.     

Access regulation and the transition from copper to fiber networks in telecoms

In this paper we study the impact of different forms of access obligations on firms’ incentives to migrate from the legacy copper network to next generation broadband infrastructures. We analyze geographically differential access prices of copper (that depend on whether or not an alternative fiber network has been deployed in the area) and ex-ante access obligations for fiber networks. We discuss how these regulatory schemes fare in addressing the tension among different objectives, such as the promotion of static efficiency, fostering investments in new infrastructures, and avoiding unnecessary duplication of (fiber) networks.     

Research on the mutual relations between ISP and ASP efficiency changes for the sustainable growth of the Internet industry

Innovations in Internet networks and applications are equally important. However, there is controversy in the literature regarding whether it is network or application innovation that leads to the development and innovation of Internet industries. In this study, the mutual relations of Internet service providers’ (ISP) and application service providers’ efficiency changes are analysed empirically using a Granger causality test. Over the entire period of 1998–2011, efficiency changes of web service companies positively Granger-cause those of ISPs and vice versa. In the case of VoIP and streaming services, however, efficiency changes of VoIP and streaming services Granger-cause those of ISPs during the former half period, whereas those of ISPs negatively Granger-cause efficiency changes of streaming services during the latter half. As services that require heavy data traffic and QoS guarantees are launched, a policy that promotes virtuous circulation between ISPs and application service providers (ASPs) is necessary for the development of all Internet-related industries.     

Access Pricing,Quality Degradation,and Foreclosure in the Internet

Access to both a local and a global network is needed in order to get complete connection to the Internet. The purpose of this article is to examine the interplay between those two networks and how it affects the domestic public policy towards a domestic provider of local access. We find that a cost-oriented regulation is detrimental to domestic welfare, because it shifts profit to the foreign provider of global access. The optimal policy is that the regulator commits itself to set an access price above costs, possibly the same price as in an unregulated market economy. A regulation of the global access price has a non-monotonic effect on domestic welfare, and there is a potential conflict between international and domestic regulation policy.     

Diffusion of mobile telephony in India: An empirical study

Diffusion of new technology is an important driver of economic growth. In this paper, diffusion of mobile telephony in India is studied. There is a vast diffusion potential in this country which needs to be exploited efficiently and in a rational way. This paper investigates the social, technological, economical and political (STEP) factors that have influenced the diffusion process of mobile telephony especially the diffusion speed. The epidemic model, which is widely employed in the diffusion studies of mobile telephony, is used for the study. The data is fitted into logistic, gompertz, and bass models by nonlinear least squares and it is found that gompertz model best describes the diffusion process of mobile telephony in India. The study reveals that competition and government intervention played a significant role in accelerating the diffusion speed of mobile telephony by making the technology affordable. It is found that mobile telephony is a substitute for fixed line telephony in India. The findings will be useful in taking managerial decisions with respect to factors in forecasting and controlling the diffusion process of emerging technologies.     

The impact of regulation and competition on the adoption of fiber-based broadband services: recent evidence from the European union member states

Fiber deployment of next-generation high-speed broadband networks is considered to be a decisive development for any information-based society, yet investment activities and especially the adoption of fiber-based broadband services take place only very gradually in most countries. This work employs static and dynamic model specifications and identifies the most important determinants of the adoption of fiber-based broadband services with recent panel data from the European Union member states for the years from 2004 to 2012. The results show that the more effective previous broadband access regulation is, the more negative the impact on adoption, while competitive pressure from mobile networks affects adoption in a non-linear manner. Finally, we also find evidence for substantial network effects underlying the adoption process.     

Service quality in Brazilian mobile telephony: an efficiency frontier analysis

The mobile telephony sector is characterized by the dynamic interplay of rapid changes in technology and an apparently growing competition, as indicated by the fierce nonprice competition, and is yet associated with the entry of new operating companies in some cases. In this context, a relevant and neglected issue is the assessment of how service quality responded to an increasingly competitive environment. This study utilizes data envelopment analysis to assess the quality efficiency of mobile telephony companies in Brazil during the 2000–2003 period. Window analysis was conducted for the entire period, taking as reference different quality indicators pertaining to different forms of complaints and calls completed and interrupted. The efficiency measurement was made feasible by interpreting the indicators reflecting a positive dimension of quality as outputs and those reflecting negative aspects of quality as inputs. Given potential heterogeneities across firms that relate to the frequency band and to the technology (time division multiple access technology and code division multiple access technology among others), this article considered adjusted efficiency scores. The Tobit model for censored data was estimated to control for the aforementioned aspects. Rescaled residuals from the econometric estimation produced efficiency scores for service quality. The evidence indicated an overall improvement in efficiency over time. Nonparametric tests were consistent with a positive evolution of quality over time even for shorter subperiods.     

Access pricing and investment: a real options approach

This paper examines a three-period model of an investment decision in a network industry characterized by demand uncertainty, economies of scale and sunk costs. In the absence of regulation we identify the market conditions under which a monopolist decides to invest early as well as the overall welfare generated by this decision. In a regulated environment, we consider a vertically integrated network provider that is required to provide access to downstream competitors and compare two distinct access pricing methodologies: the Efficient Component Pricing Rule (ECPR) and the Option to Delay Pricing Rule (ODPR). We identify the welfare-maximizing access prices using the unregulated market output as a benchmark and show that optimal access regulation depends on market conditions (that is, the nature of demand) with two possible outcomes: (i) access prices that provide a positive payoff to the incumbent, that is, provide a positive compensation to account for the option to delay; and (ii) access prices that yield a zero payoff to the incumbent. Moreover, unlike the earlier literature that argues in favor of an ECPR-type methodology to account for the interaction between irreversibility and demand uncertainty, we find that, except under very specific conditions, an access price that accounts for the option to delay value is welfare-superior to the ECPR.      

The usage of VoIP services and other communication services: An empirical analysis of Italian consumers

This paper examines the early stages of VoIP usage by analyzing the relationship between the usage of VoIP services and other voice and non-voice communication services in Italy. In doing so, it aims at filling the gap in the empirical literature on the diffusion of VoIP among consumers and aims at investigating the relationship between VoIP adoption and the usage of telecom and Internet-related services. It relies upon a survey carried out among consumers in Italy in 2006. The use of VoIP is negatively associated with the usage of other voice communication services — mobile communications in particular, but shows some degree of complementarity with other non-voice (Internet-based) communication services, suggesting that familiarity with the web plays a significant and positive role in explaining the adoption of VoIP applications. Furthermore, individual users' technical skills, job position and communications' habits also matter in determining the adoption of VoIP.     

The diffusion of Internet telephony among consumers and firms: Current issues and future prospects

This paper analyses the current demand and market potential for Internet telephony—the transmission of voice over the public Internet or over a private Intranet—a technology that has attracted considerable attention as an appealing alternative to traditional telephony but that is likely to develop as a component within an integrated system of video, data and voice applications. The paper investigates technical, economic and social factors supporting and hindering the adoption of Internet telephony. In doing so, it relies upon the idea that the diffusion of Internet telephony is determined both by the attributes of the technological applications as perceived by the potential adopters, and by the characteristics of different users. According to this view, the research points out that relevant uncertainties reside on the demand side, particularly among residential users, and that in the future, businesses are more likely to adopt these applications than consumers. The assumptions concerning the future diffusion of Internet telephony are supported by the results of a survey carried out among a sample of Internet telephony service providers in Europe and North America.     

On selecting a technology evolution path for broadband access networks

The rapid growth in the number of Internet users has accelerated the use of high-speed Internet access services, including broadband multimedia services. In the delivery of broadband multimedia services to end-users, it is necessary to build a high-speed backbone and access network. To construct a broadband access network, several alternative technologies including xDSL, CATV, and FTTx have been suggested and implemented in telecommunication networks. However, even if a technology is proven to be optimal for the current environment, it can be deteriorated by the elapse of time or the advent of new challenging technologies in the future. In this article, we concentrate on the selection of an evolution path for broadband access networks. We developed an optimization model for selecting the best technology and evolution path with the minimum total cost. The problem can be formulated as a mixed integer programming model. With a scenario for demands and cost factors, we find the optimal evolution path by solving our model with the CPLEX program and illustrate some sample paths for the broadband access network evolution plan. Once the cost and the demand are defined in detail to reflect the real-world case, our model can be useful to generate a practical technology evolution plan for broadband access networks in real-world applications.     

Competitive Neutrality in Access Pricing

This article examines the notion of competitive neutrality when setting access prices for vertically integrated bottleneck networks. In contrast to the claims of regulated firms (for example, Telstra), it is not possible to argue that access charges that involve unit prices in excess of short‐run marginal cost reflect competitive neutrality. That is, we demonstrate that in general models of downstream oligopoly, upstream prices that differ from marginal cost are not competitively neutral in the sense of placing integrated and non‐integrated firms on an equal basis.     

Options for Electricity Transmission Regulation in Australia

The pricing of access to electricity transmission networks in Australia is currently under review. Several options have been proposed including those based on nodal pricing and the assignment of transmission rights contracts. As most of the marginal costs of transmission are recovered through wholesale electricity prices we focus on the key issue of regulation and investment incentives. We find that current options are unlikely to be adequate in terms of encouraging socially optimal levels and timing of new transmission investment. As an alternative, we propose a regulatory scheme, based on a related idea by Sappington and Sibley that can overcome this problem. Our scheme can potentially generate first best results and is readily applicable given the current institutional structure of electricity markets in Australia.     

Business Demand for Broadband Access Capacity

Using data garnered from a quarterly survey of U.S. business establishments from 2Q2000 through 1Q2001, the study estimates an aggregate model of business demand for broadband access capacity. The primary goal is to estimate price elasticities for the demand for access capacity conditional on a business establishment having made the decision to adopt some form of broadband access. The primary findings are (1) on average, the demand for broadband access capacity is price inelastic; (2) the sensitivity to price differs substantially across establishments of different sizes with small establishments exhibiting the greatest sensitivity to price; and (3) the estimated elasticities have important implications for public policies designed to extend broadband networks to unserved areas.