ACQUISITION AND DISSEMINATION OF INFORMATION IN IMPERFECTLY COMPETITIVE MARKETS

In imperfectly competitive markets, incentives for the acquisition and dissemination of information by prices is significantly affected by strategic considerations. Since prices reveal information, firms possessing market power may choose to set prices which are either biased or not adjusted to all available information so as to distort their information content. Even when information is costlessly available strategic considerations may lead firms to remain uninformed. These results are illustrated in a simple Stackelberg model with price-setting firms where the pricing game is preceded by an information acquisition game.     

Leaving the Nordic Path? The Changing Role of Danish Trade Unions in the Welfare Reform Process

For a long period, Denmark has been labeled a ‘model country’ with a comprehensive welfare state and a successful model of corporatist policy‐making. Danish unions are considered amongst the strongest in the world, and they have for a long time been a distinct part of the political system, and as social partners, they were strongly integrated into decision‐making processes. The analysis of the Danish welfare and labour market policy during the last two decades documents a profound change in the arrangement and in the status of the social partners (especially unions) in the Danish political system. The results show that two important pillars of the Danish model – the social partner basis and the collective trust in partnership – are eroding. Unions are no longer part of the law‐making process and, since 2007, they are formally excluded from the organization of the decision‐making process. Recent developments point at weaker unions that operate more as lobbyists instead of being strong corporatist institutions or part of the decision‐making process. The results of the study are thought‐provoking and the basis for a revised thinking of the Danish and the Nordic model.     

Income effects of divorce in families with dependent children

The Norwegian post-divorce transfer scheme for families with children guarantees minimum maintenance payments from the non-custodial to the custodial parent. We studied the economic effects of divorce in such families. When the mother has custody, she falls behind before maintenance payments. After adding these, the outcomes at the median are very similar for both parents, contrasting studies from other countries, but the risk of a drop in equivalized income is large.     

First moment approximations for order statistics from the extreme value distribution

Approximate expressions of the first moment of the order statistics of standard extreme value distributions are proposed. We compare different previously given approximations with the exact values. The results show that the approximation given here fits the exact values better than previously given models.     

Ethnic and gender diversity,process and performance in groups of business students in Sweden

This article investigates the complex interrelation between ethnic and gender diversity, process and performance among groups of business students. The article is based on an empirical survey of business students working on a complex assignment in groups of two to five in a small Swedish university. The results indicate that gender diversity leads to positive group outcomes, while ethnic diversity appears to create negative group outcomes. Intervening process variables, such as group communication, conflict and effectiveness in problem solving, were not found to be influenced by diversity, or to influence group outcomes. While the non‐influence of intervening variables can probably be explained by methodological difficulties, the negative outcome for ethnic diversity indicates a need to help students better manage ethnic diversity in order to reap its benefits.     

Recurrent events and the exploding Cox model

Counting process models have played an important role in survival and event history analysis for more than 30 years. Nevertheless, almost all models that are being used have a very simple structure. Analyzing recurrent events invites the application of more complex models with dynamic covariates. We discuss how to define valid models in such a setting. One has to check carefully that a suggested model is well defined as a stochastic process. We give conditions for this to hold. Some detailed discussion is presented in relation to a Cox type model, where the exponential structure combined with feedback lead to an exploding model. In general, counting process models with dynamic covariates can be formulated to avoid explosions. In particular, models with a linear feedback structure do not explode, making them useful tools in general modeling of recurrent events.     

Non-linear mixed logit

We develop an extension of the familiar linear mixed logit model to allow for the direct estimation of parametric non-linear functions defined over structural parameters. Classic applications include the estimation of coefficients of utility functions to characterize risk attitudes and discounting functions to characterize impatience. There are several unexpected benefits of this extension, apart from the ability to directly estimate structural parameters of theoretical interest.