More Detail on the Pattern of Returns to Educational Signals

This paper develops a multiperiod model in which workers are matched with jobs according to imperfect educational signals, and their subsequent productivities depend on both their inherent ability and on the quality of the job match. The model outlines a sequential process in which underpaid employees reveal their true productivities and overpaid employees are detected by the firm until every match is perfect. The model produces increasing returns to above median educational signals early in a worker's career—a new feature that earlier models did not capture. Estimates using data from the Current Population Survey are consistent with the theoretical result and are suggestive of a concave time pattern for the returns to educational signals.     

Experimental test of airplane boarding methods

We report the results of an experimental comparison of airplane boarding methods. This test was conducted in a mock Boeing 757 fuselage, located on a Southern California soundstage, with 12 rows of six seats and a single aisle. Five methods were tested using 72 passengers of various ages. We found a significant reduction in the boarding times of optimized methods over traditional methods. These improved methods, if properly implemented, offer the potential for significant savings to airline companies.     

Social pressure,uncertainty, and cooperation

We analyse the role of uncertainty in a sequential game where players have to decide whether to contribute to a public project or not. A player's payoff may depend on his belief about the other player's action which allows us to model social pressure. Using the theory of psychological games, we show that the players' propensity to choose an individually costly action such as cooperation in a public project may increase if there is some uncertainty about who has cooperated before. A central agency, e.g. the government, can induce incomplete information by using a randomization policy, thus crowding in private contributions. Received: November 16, 1998 / Accepted: May 31, 1999     

Working in the digitized economy: HRM theory & practice

In our introduction to this special issue on the gig economy, we provide some context to how and why this phenomenon should be studied, with a particular emphasis on Human Resource Management. We then describe the four articles that comprise the special issue, and we note some common themes. Our introduction concludes with some suggestions for future research on the gig economy.     

Zur Methodik von Effizienzbewertungen im energiewirtschaftlichen Kontext

In discussions concerning sustainability, climate change and the efficient use of resources, the terms energy efficiency, rational use of energy and resource efficiency are widely used. Each of those three terms corresponds to an assessment method. However, the terms and assessment methods are often used differently without an explicit definition of the actual approach. Therefore the major contribution of this article is the development of a framework of methodological characteristics to classify the three assessment methods.The three methodological characteristics of assessment methods are the definition of the object of investigation, the type of statement and the assessment setting. The assessment setting is specified by three criteria: balance boundary, aggregation level and measuring units.All three assessment methods rely on the concept of efficiency, defined as a utility-effort-ratio. The object of investigation influences the utility, which is formalized by a measuring unit. The balance boundary for the utility determines to what extent the utility is considered. The balance boundary for the effort describes which resources are captured for which upstream and downstream processes. The aggregation level describes the extent to which different resources are aggregated as one measuring unit. Monetary, physical or self-designed units are commonly used as measuring units.The plurality of possible manifestations of the balance boundary, the aggregation level and the measuring unit does not allow for a universally valid, precise definition of the three investigated assessment methods. Therefore the recommendations are: Firstly, when using an assessment method, the criteria of the framework should be used to document the approach. Secondly, the identification of the adequate assessment method should be based on a thorough discussion of goals and hierarchy of goals in politics.     

Deregulation of the labor market and chances of employment in Great Britain

This paper examines labor market mobility from an historical perspective, using the United Kingdom as a case study. Movements into and out of employment are related to the institutional developments of the last two decades. In Great Britain, the dynamics of transitions in the labor market have increased over the last two decades, but individual path dependency, that is, the transmission of risks along the life course, seems to have decreased. Women in particular have benefitted from a more flexible labor market while men's employment opportunities have decreased. Employment has also been increasingly tied to economic development.     

Special issue on economic policy in Portugal: innovation,competitiveness, and internationalisation. Editors’ introduction

Portuguese Economic Journal -