Regulation of Mobile Telephony across the European Union: An Empirical Analysis

In this paper I analyze the impact of regulatory policy on prices and demand for mobile telecommunications services across the European Union. I estimate a reduced form model of the mobile industry using panel data for the EU countries from 1998 to 2002. Among others, I find the following effects: liberalization of fixed telephone lines has a negative impact on prices and a positive impact on the demand for mobile services, and the introduction of mobile number portability has a negative impact on prices.*I am grateful to Toker Doganoglu, Gerd Hansen, Eric Kodjo Ralph, Guido Friebel, participants at the 30th EARIE Conference 2003, the 2nd International Industrial Organization Conference 2004 and the 19th Annual Congress of the EEA 2004, and anonymous referees for valuable comments. I would like to acknowledge the generous financial support from the Volkswagen Stiftung and the Munich Graduate School of Economics which made this research possible. All errors are mine.1 Source: European Commission (1994).     

Option Pricing in Discrete‐Time Incomplete Market Models

Various aspects of pricing of contingent claims in discrete time for incomplete market models are studied. Formulas for prices with proportional transaction costs are obtained. Some results concerning pricing with concave transaction costs are shown. Pricing by the expected utility of terminal wealth is also considered.     

The Competitiveness of Mobile Telephony across the European Union

This paper analyses the competitiveness of the mobile telecommunications industry across the European Union. A structural model of demand and supply has been estimated for annual data on 15 EU countries from 1998 to 2002. Estimates of country‐specific conjectural variations allow us to compare the competitiveness of mobile telephony across the EU, and can offer an alternative to the evaluation of competition based on direct cross‐country price comparisons. Average industry conjectural variations decrease over time as a result of regulation. The liberalization of fixed telephone lines and the introduction of number portability for mobiles increase the competitiveness of the mobile industry.     

The enlargement of the euro area: differences in relative inflation

This paper investigates the structural determinants of relative inflation (i.e. the inflation of non‐tradables vs tradables) in the context of overall inflation differentials in the EU. The analysis is based on the Bergstrand theoretical model. This framework incorporates three alternative hypotheses of relative inflation (Harrod–Balassa–Samuelson, relative factors endowment, and demand effects). Due to the lack of reliable data on capital stocks only a curtailed version of the model is tested here empirically. The various specifications of the model are estimated for the majority of EU countries, using the Pedroni panel group mean FMOLS estimator. In general, relative labour productivity and demand factors turn out to be significant and correctly signed, though evidence in favour of the latter effect seems to be less robust. In addition, differences in the determination of relative prices between the new and old EU Member States are found. They seem to be consistent with theoretical considerations and the transition phenomenon. The estimation results are very sensitive to the definition of non‐tradables. The paper also discusses policy implications for overall inflation, stemming from relative price models. It questions the usefulness of relative inflation models for the analysis of overall inflation differentials and practical policy decisions.     

The Recent Critique of Theoretical Economics: A Methodologically Informed Investigation

My purpose is to appraise the recent critique of theoretical economics by applying the methodological perspective. Therefore, I start by identifying the main lines of criticism raised against theoretical economics in the aftermath of the post-2008 global economic crisis: namely, the voices criticizing economics for its unrealistic models, excessive mathematization, and overconfidence in its theoretical claims. First, I show that these issues are interconnected and should be jointly analyzed. Next, I investigate these lines of critique from the perspective provided by the latest achievements in the philosophy of economics (e.g., studies on the epistemic role of economic models). Taking this perspective reinforces some allegations against economics (e.g., these voices accusing economists of treating economic laws as universal laws of nature) and makes some criticisms more nuanced (e.g., the issue of unrealistic assumptions). I conclude by stating that such a methodological perspective is necessary in critically apprising the recent critique of economics.     

Intentions to Return of Clandestine Migrants: Comment

We take issue with the reasoning of Coniglio et al. ( 2009 ) that whereas better‐skilled illegal migrants will prefer to return‐migrate, lower‐skilled illegal migrants will not. We argue that under asymmetric information, all the illegal migrants are initially paid a wage based on the average productivity of the group of illegal migrants. The better‐skilled illegal migrants thus face two “taxes:” being paid less than if they were legal, and being averaged down. Therefore, better‐skilled illegal migrants can be expected to expend more effort to become legal than lower‐skilled illegal migrants. And once legalized, there is no reason for the better‐skilled illegal migrants to want to return to their country of origin more than the lower‐skilled illegal migrants. Thus, it is the lower‐skilled illegal migrants that are likely to dominate the return migration flow. We argue that in other respects too, the model of Coniglio et al. is not based on reasonable assumptions, and that even under the postulated assumptions, the model suffers from several inconsistencies. In particular, when the rate of return to savings is an increasing function of skill level, we would expect there to be few better‐skilled individuals among illegal migrants in the first place. Also, an obvious distinction between savers and borrowers is ignored.     

The consumer loss of the minimum duration for mobile telephone calls

This article estimates price elasticities of demand for the duration of mobile telephone calls for Portugal, as well as the monetary loss per consumer of the existence of a minimum duration of calls. The demand for the duration of calls is estimated using a Tobit model for panel data with individual random effects. The elasticity of demand is found to be small and to vary across firms. At current prices, the average duration of calls ranges between 101 and 109 s, while the estimated average length of calls without minimum duration ranges between 63 and 66 s. Hence, the existence of a minimum duration for calls results in a monetary loss of 35–40% of the average invoice.     

Culture and Economics: On Values,Economics and International Business

In his Idea of Justice, Amartya Sen compares the two basic approaches to evaluating institutions, transcendental institutionalism and realization-focused comparisons. Referring to Adam Smith's Impartial Spectator, he argues in favor of the latter and proposes the principle of open impartiality. However, this cannot solve the tension between universalism and contextualization of values that Sen has inherited from Smith. Based on recent Hegel scholarship, we argue that some of the difficulties can be resolved, considering the role Smith played in the development of Hegel's thinking. Hegel's concept of recognition plays an essential role in establishing the possibility of impartiality both on the level of consciousness and on the level of institutional intersubjectivity. Hegel's critique of Kant's formalist ethics (also considered as transcendental institutionalism by Sen) and his analysis of the civil society in the Philosophy of Right, especially his focus on associations and Estates, can serve as a model for making Sen's focus on public discourse theoretically more concise and pragmatically feasible. Hegel shows that universalistic attitudes can only emerge in specific institutional contexts.