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Given the variety of a reference librarian's duties, it is difficult to measure the quality of his or her performance. In this article, Tom Carter describes the employee evaluation procedure used at an academic library, and explains the principles on which the method is based.

This paper aims to argue that the principal components of the Resource‐Based View (RBV) as a theory of sustained competitive advantage are not a sufficient basis for a complete and consistent theory of firm behaviour. Two missing elements are value theory and accountability mechanisms.

The paper proposes a link between value theory and accountability using a Resource Value‐Resource Risk perspective as an alternative to the Capital Asset Pricing Model. The link operates first from the labour process, where value is created but is imperfectly observable by intra‐firm mechanisms of organizational control and outside governance arrangements without incurring monitoring costs. Second, it operates through contractual arrangements which impose fixed cost structures on activities with variable revenues.

The paper thereby explains how value originates in risky and difficult to monitor productive processes and is transmitted as rents to organizational and capital market constituents. It then reviews recent contributions to the RBV, arguing that the proposed new approach overcomes gaps inherent in the alternatives, and thus offers a more complete and integrated view of firm behaviour.

The RBV can become a coherent theory of firm behaviour, if it adopts and can integrate the labour theory of value, associated measures of risk arising from the labour process and mechanisms of accountability.

The estimation of the effects of treatments – endogenous variables representing everything from child participation in a pre-kindergarten program to adult participation in a job-training program to national participation in a free trade agreement – has occupied much of the theoretical and applied econometric research literatures in recent years. This volume brings together a diverse collection of papers on this important topic by leaders in the field from around the world. This collection draws attention to several key facets of the recent evolution in this literature.

Quality circles are organisational interventions that seek to increase an organisation's productivity and the quality of its products through direct employee participation. The underlying assumption is that such participation will result in useful suggestions for improving work methods and quality, and for increasing employee commitment to implement these changes. Quality circles typically are small groups of volunteers from the same area who meet regularly, under the leadership of their supervisor, to identify, analyse and solve quality and related problems in their respective areas of responsibility.

The collection of chapters in this 30th volume of Advances in Econometrics provides a well-deserved tribute to Thomas B. Fomby and R. Carter Hill, who have served as editors of the Advances in Econometrics series for 25 and 21 years, respectively. Volume 30 contains a more varied collection of chapters than previous volumes, in essence mirroring the wide variety of econometric topics covered by the series over 30 years. Volume 30 starts with a chapter discussing the history of this series over the last 30 years. The next five chapters can be broadly categorized as focusing on model specification and testing. Following this section are three contributions that examine instrumental variables models in quite different settings. The next four chapters focus on applied macroeconomics topics. The final chapter offers a practical guide to conducting Monte Carlo simulations.