Semiparametric Bayesian inference in multiple equation models

This paper outlines an approach to Bayesian semiparametric regression in multiple equation models which can be used to carry out inference in seemingly unrelated regressions or simultaneous equations models with nonparametric components. The approach treats the points on each nonparametric regression line as unknown parameters and uses a prior on the degree of smoothness of each line to ensure valid posterior inference despite the fact that the number of parameters is greater than the number of observations. We develop an empirical Bayesian approach that allows us to estimate the prior smoothing hyperparameters from the data. An advantage of our semiparametric model is that it is written as a seemingly unrelated regressions model with independent normal–Wishart prior. Since this model is a common one, textbook results for posterior inference, model comparison, prediction and posterior computation are immediately available. We use this model in an application involving a two‐equation structural model drawn from the labour and returns to schooling literatures. Copyright © 2005 John Wiley & Sons, Ltd.     

Are Returns to Schooling Concentrated Among the Most Able? A Semiparametric Analysis of the Ability–earnings Relationships1

In this paper I explore the relationship between ability and log waves using flexible estimation techniques. I find evidence of nonlinearities in these relationships that vary across levels of schooling, and argue that ability‐sorting into higher education creates problems for accurately identifying the return to schooling over the entire ability support. Over an ability support that is “common” to those with and without a college education, I find that the college log wage premium is incerasing for the more able, and this premium grew during the period 1984–1994 for individuals at all points in the ability distribution. The growth of this wage premium over time also appears to have followed a “smoother” linear path for high‐ability individuals than individuals of lower ability.     

Conjoint Controlling: Organisationsgerechte Controllingsysteme zwischen Better Budgeting und komplex-hybrider Steuerung

Zusammenfassung Etablierte Controllingsysteme einerseits und moderne Organisationsstrukturen andererseit scheinen immer weniger zueinander zu passen. W?hrend sich die Strukturen durch Dezentralisierung und durch die überschreitung der traditionellen Unternehmensgrenzen auszeichnen, sind die Controllingsystem—im Interesse der Verfolgung der Koordinationsfunktion—prim?r durch Zentralisation gepr?gt. Vor allem mit verschiedenen Varianten einfach-hybrider Budgetierungssysteme soll eine Beseitigung dieses strategischen Misfits gelingen. Moderne Organisationsstrukturen haben jedoch den Charakter von komplexen Hybridstrukturen (Conjoint-Strukturen). Ein organisationsgerechtes Controlling muss sich daher in einem dreidimensionalen Modell an Hybridstrukturen aus Markt und Hierarchie, aus Fremd- und Selbstorganisation und aus Kooperation und Konkurrenz anpassen. Bausteine, Konstruktionsprinzipien und Herausforderungen eines zur Steuerung derartiger Strukturen geeigneten “Conjoint Controlling” werden im vorliegenden Beitrag umrissen.

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Summary The gap between today's controlling systems and modern organizational structures is widening. Whereas structures are characterised by decentralisation and break-up of boundaries of the firm, controlling systems remain centralised to fulfil their coordination purpose. Although budgeting systems have recently been the target of major changes the strategic misfit between controlling and structure still exists. Current reforms ignore the fact that modern organizational structures represent complex hybrid structures (so called conjoint structures). Conjoint structures require conjoint controlling systems which cover hybrid structures that are represented by analgams (combining market and hierarchy), coopetition (combining cooperation and competition), and heterarchy (combining management and self organization). The scope of archetypes and architectures of conjoint controlling is outlined in an exploratory approach to hybrid control systems.

     

Coaching,Counseling, Case‐Working: Do They Help the Older Unemployed Out of Benefit Receipt and Back Into the Labor Market?

Intensified counseling, job search assistance and related policies have been found to be effective for labor market integration of the unemployed by a large number of studies, but the evidence for older and hard‐to‐place unemployed is more mixed. In this paper, we present key results for a large‐scale active labor market program directed at the older unemployed in Germany. To identify the treatment effects, we exploit regional variation in program participation. We use a combination of different evaluation estimators to check the sensitivity of the results to selection, substitution and local labor market effects. We find positive effects of the program in the range of 5–10 percentage points on integration into unsubsidized employment. However, there are also substantial lock‐in effects, such that program participants have a higher probability of remaining on public welfare benefit receipt for up to 1 year after commencing the program.     

Excluded coalitions and the distribution of power in parliaments

In this article, we introduce a new value for cooperative games. This value is based on the Shapley (1953) value and takes into account that players exclude coalitions with other players. One example of such exclusions are the coalition statements of parliamentary parties. A case study demonstrates the application of the new value for these situations.     

Political Authority and Bureaucratic Resilience

Abstract

Consumerism and choice have become prominent ideas in the design and delivery of public services. Often perceived as a way to improve the quality and value of public services, potential downsides and areas of concern that relate to a consumerist approach are frequently ignored. This review essay takes a critical stance on the application of a consumerist discourse to public service provision and management by exploring four key areas of concern: definitional problems, questions about the concept's transferability from a private to a public sector setting, the problematic nature of ‘choice’, and difficulties associated with implementing consumerist ideas within public service contexts..     

Network configuration,customer centricity,and performance of open business models: A solution provider perspective

While research has shown a positive impact of open business models on value creation, it has remained silent on the configuration of the corresponding partner networks and their effect on performance. Studying three cases of solution providers which involve external service partners for solution delivery, we find that solution customer centricity – the degree to which the focal firm focuses on solution customers in the joint delivery of solutions – moderates the relationship between partner networks and open business model performance. For open business models with low solution customer centricity, a network configuration characterized by many weak ties to service partners leads to superior performance. Conversely, for open business models with high solution customer centricity, few but strong ties to partners lead to superior performance. Based on these findings, three ideal configurations of networks for open business models are derived: the controlled, the joint, and the supported model.     

A field experiment on intertemporal enforcement spillovers

Enforcement can affect compliance directly and indirectly, through spillovers. We study intertemporal enforcement spillovers by conducting a randomized field experiment in a university exam. The initial phase of the experiment is the exam itself. We induce variation in enforcement by randomly assigning students to rooms with different monitoring levels. The second phase is post-exam. In this phase, all students are subject to the same low level of monitoring. Our outcome variable is the probability that students steal a pen in the post-exam phase. We find that enforcement in the exam phase has a strong intertemporal spillover on compliance in the post-exam phase: students subject to a high monitoring level in the initial phase are about 33% less likely to steal the pen than students subject to low initial monitoring.     

A comparison of different pay-per-bid auction formats

Pay-per-bid auctions are a popular new type of Internet auction that is unique because a fee is charged for each bid that is placed. This paper uses a theoretical model and three large empirical data sets with 44,614 ascending and 1,460 descending pay-per-bid auctions to compare the economic effects of different pay-per-bid auction formats, such as different price increments and ascending versus descending auctions. The theoretical model suggests revenue equivalence between different price increments and descending and ascending auctions. The empirical results, however, refute the theoretical predictions: ascending auctions with smaller price increments yield, on average, higher revenues per auction than ascending auctions with higher price increments, but their revenues vary much more strongly. On average, ascending auctions yield higher revenues per auction than descending auctions, but results differ strongly across product categories. Additionally, revenues per ascending auction also vary much more strongly.