land- phone, like mobile, internet and fax is a communication device and has network externality effect. thus as the penetration coefficient increases, the network effect improves. the transmission of information via the word of mouth is the main source of enhancing the network externalities coefficient. in this article we have investigated the factors affecting the network externality coeffici...

Article history: Received 8 February 2009 Received in revised form 6 May 2009 Accepted 14 May 2009 Available online 23 June 2009 JEL classificaitons: D6 L5 L96

This paper analyses price elasticities in the Austrian market for mobile telecommunications services using data on firm specific tariffs in the period between January 1998 and March 2002. Dynamic panel data regressions are used to estimate short-run and long-run demand elasticities for business customers and for private consumers with both postpaid contracts and prepaid cards. We find that busi...

Motivated by the increasing energy consumption of supercomputing for weather and climate simulations, we introduce a framework for investigating the bit-level information efficiency of chaotic models. In comparison with previous explorations of inexactness in climate modelling, the proposed and tested information metric has three specific advantages: (i) it requires only a single high-precision...

In this article, we review our recently introduced methods for obtaining strictly positive lower bounds on the top Lyapunov exponent of high-dimensional, stochastic differential equations such as weakly-damped Lorenz-96 (L96) model or Galerkin truncations 2d Navier-Stokes equations. This hallmark chaos has long been observed in these models, however, no mathematical proof had made either determ...

One important determinant of the speed and success of transition will be the efficiency of transformation and development of the infrastructure sectors. A great deal of attention has been paid to issues such as privatisation, restructuring, user prices, and terms of access in these sectors, regarding both developed and developing countries. Some issues regarding vertical restructuring are notab...

This paper analyzes auctions where budget-constrained bidders have options to declare bankruptcy. It predicts a bidding equilibrium that changes discontinuously in a borrowing rate available to bidders. When the borrowing rate is above a threshold, high-budget bidders win, and the likelihood of bankruptcy is low. When the borrowing rate is below the threshold, the winner is the most budget-cons...

One important determinant of the speed and success of transition will be the efficiency of transformation and development of the infrastructure sectors. A great deal of attention has been paid to issues such as privatisation, restructuring, user prices, and terms of access in these sectors, regarding both developed and developing countries. Some issues regarding vertical restructuring are notab...

A multi-product cost model is estimated on a panel of U.S. local exchange carriers from the period 1989–1999. The model allows specification of cost inefficiency to avoid potential bias in the estimates. Unlike earlier research, the paper experiments with several proxies of the carriers’ access provision. The results show slight economies of scale and density with moderate cost increments due t...

There is a significant degree of regulatory fragmentation in telecommunications to the extent that at least a telecommunications or industry-specific agency (ISA) and the antitrust agency (AA) coincide in enforcing rules in this business. In this paper, I analyze the determinants of the institutional arrangements observed between the institutions involved in telecommunications regulation corres...