Identifying the Most Relevant Lag with Runs

ABSTRACT In this paper, we propose a nonparametric statistical tool to identify the most relevant lag in the model description of a time series. It is also shown that it can be used for model identification. The statistic is based on the number of runs, when the time series is symbolized depending on the empirical…

A permutation entropy based test for causality: The volume–stock price relation’

ABSTRACT The purpose of this paper is to propose a newly developed non-parametric test for linear and nonlinear causality based on permutation entropy and to show its usefulness in analyzing the potential causal relationship between trading volume and security prices. Most of the empirical applications and tests for causality rely on using Granger causality based…

“Information and Quality with an Increasing Number of Brands

ABSTRACT We analyze the potential trade-off between product variety and consumer information and the implications this trade-off has for product quality. We introduce a simple information accumulation process in a horizontal differentiation model with unobservable quality. As the number of brands increases, per-brand consumer information decreases, which leads to lower average quality. Eventually, the reduction…

Specialization Across Goods and Export Quality

ABSTRACT This paper explores the link between specialization across goods and specialization within goods along the quality dimension. It develops a tractable many-country, many-industry Ricar- dian model with an integer number of heterogeneous firms producing each good, under a generic assumption about the distributions of firm e ciencies. In equilibrium, each country exports a range…

Customer Service Quality and Incomplete Information in Mobile Telecommunications: A Game Theoretical Approach to Consumer Protection

Customer Satisfaction of Mobile Internet Users: An Empirical Approximation for the Case of Spain

ABSTRACT This paper studies the mobile Internet services in Spain. It deals mostly with overall consumer satisfaction as well as with some of its attributes. The study is based on Micro data from a survey conducted by the Spanish Center for Sociological Research (CIS, 2009). The analysis shows that communication quality and cost are the…

Defensa de los consumidores individuales de telefonía móvil en España. De la calidad técnica a la calidad del servicio

ABSTRACT Consumer protection in the mobile telecommunications industry has become increasingly important, in particular because in Spain individual consumers exhibit considerably lower satisfaction levels than in the rest of Europe. Recently, consumer protection legislation has been shifting its focus from technical quality to subjective customer service quality. In order to adequately monitor service quality, we…

Una panorámica de las telecomunicaciones en España

Abstract: This article deals with some relevant aspects concerning the Spanish telecom sector in order to show a panoramic view of it. Some of them will be analyzed in detail in other articles of this volume. The article starts by placing the telecom sector within the ICT (Information and Communications Technologies) macro sector. Then we…

Satisfaction of Individual Mobile Phone Users in Spain

Abstract: Consumer satisfaction is a key determinant of consumer retention, consumer welfare, and is also a strategic variable for competition and international comparisons. Spain’s mobile customer satisfaction is the lowest in the European Union. The focus of this paper is to identify the determinants of residential mobile phone users’ satisfaction among private consumers of mobile…