Competition and compatibility among Internet Service Providers

We consider a two-stage game between two competing Internet Service Providers (ISPs). The firms offer access to the Internet. Access is assumed to be vertically and horizontally differentiated. Our model exhibits network externalities. In the first stage the two ISPs choose the level of compatibility (i.e. quality of a direct interconnect link between the two networks). In the second stage the two ISPs compete á-la Hotelling. We find that the ISPs can reduce the stage 2 competitive pressure by increasing compatibility due to the network externality. The firms will thus agree upon a high compatibility at stage 1. When it is costly to invest in compatibility, we find that the firms overinvest, as compared to the welfare maximising investment level.     

The Broadband Access Market: Competition,Uniform Pricing and Geographical Coverage

In this paper we analyze the market for broadband access. A key feature of this market is that it is considerably more expensive to connect consumers in rural locations than in urban locations. We show that while competition increases welfare compared to monopoly when prices are free to differ across locations, the opposite may be true if there is a requirement of uniform pricing across locations. Furthermore, we show that given uniform pricing, the regulator may increase consumer surplus as well as profit by requiring a higher regional coverage than the market outcome.     

NUMERICAL DISTRIBUTION FUNCTIONS OF FRACTIONAL UNIT ROOT AND COINTEGRATION TESTS

We calculate, by simulations, numerical asymptotic distribution functions of likelihood ratio tests for fractional unit roots and cointegration rank. Because these distributions depend on a real‐valued parameter b which must be estimated, simple tabulation is not feasible. Partly owing to the presence of this parameter, the choice of model specification for the response surface regressions used to obtain the numerical distribution functions is more involved than is usually the case. We deal with model uncertainty by model averaging rather than by model selection. We make available a computer program which, given the dimension of the problem, q, and a value of b, provides either a set of critical values or the asymptotic P‐value for any value of the likelihood ratio statistic. Copyright © 2012 John Wiley & Sons, Ltd.     

Imitation,Contagion, or Exertion? Using a Tax Reform to Reveal How Colleagues' Sick Leaves Influence Worker Behaviour

We analyse the social interaction effects in sick‐leave behaviour in the workplace, using high‐quality Norwegian matched employer–employee data with detailed individual information on sick leaves during the 2004–2006 period. We find that social interaction effects in sick‐leave behaviour in the workplace do exist, and that the effects are noticeable in size. The strong relationship between the sick‐leave rates among colleagues is not solely the result of contagious diseases, nor is it caused by improved informational quality or by the increased workload for the non‐absent workers. Evidence supports the existence of reciprocal worker behaviour that is unrelated to joint leisure‐seeking activities.     

Empirical Evidence on the Relationship between Mobile Termination Rates and Firms' Profits

The theoretical literature on mobile termination rates (MTRs) is inconclusive on how the level of MTRs affects overall consumer charges and firms' profits. We show that when firms offer bundles with fixed included usage – a tariff structure that has become more common in recent years – an identical change in all MTRs does not affect firms' retail prices or profits. We use a panel dataset from saturated European markets to estimate the effect of MTRs on mobile operators' profits. As predicted by the theoretical model, we cannot reject the fact that firms' profits are unaffected by an identical change in all MTRs.     

Vertical Control and Price Cycles in Gasoline Retailing

We examine Norwegian gasoline pump prices using daily station‐specific observations from 2003 to 2006. The four big gasoline companies use a vertical restraint that is adopted industry‐wide (labeled price support). This moves price control from the hands of independent retailers into the hands of the headquarters. Retail gasoline prices follow a fixed weekly pattern, where we observe de facto simultaneous decision‐making by the headquarters (without knowledge of their rivals’ prices) when every Monday around noon they decide to increase pump prices to the same level. The price level on Mondays corresponds to the recommended prices published by the headquarters of the gasoline companies.     

A fractionally cointegrated VAR analysis of economic voting and political support

We use a fractionally cointegrated vector autoregressive model to examine the relationship between Canadian political support and macroeconomic conditions. This model is well suited for the analysis because it allows multiple fractional time series and admits simple asymptotic inference for the model parameters and tests of the hypotheses of interest. In the long‐run equilibrium, we find that support for the Progressive Conservative Party was higher during periods of high interest rates and low unemployment, while support for the Liberal Party was higher during periods of low interest rates and high unemployment. We also test and reject the notion that party support is driven only by relative (to the United States) economic performance. Indeed, our findings suggest that US macroeconomic variables do not enter the long‐run equilibrium of Canadian economic voting (political opinion poll support) at all.     

The carnival goes on and on! Children’s perceptions of their leisure time and play in SFO 1

This paper deals with one part of a research project which aimed to identify a solid sociological base for a variety of adult education activities, through a combination of analytical and ethnographic approaches. The main focus here is on adult education as a leisure form. I propose that in considering adult education as a leisure form, account has to be taken of the relationship between leisure, paid work, the domestic work of women, and consumption in capitalist society. It is concluded that access and equal opportunities are crucial issues in considering adult education as a leisure form, but that equally important are the considerations of adult education as a preparation for leisure and leisure itself as an activity from which adults learn.