Biases in demand analysis due to variation in retail distribution

Aggregate demand models typically assume that consumers choose between all available products. Since consumers may be unwilling to search across every store in a given market for a particular item, this assumption is problematic when product assortments vary across stores. Using supermarket scanner data for five product categories we demonstrate that approximately one third of products have limited retail distribution, which account for one fourth of dollar sales. Monte Carlo analysis demonstrates that the level of limited product availability observed in the data can significantly bias the results of aggregate demand models that incorrectly assume all consumers in a given market face the same choice set.     

Trends and developments in industrial relations and industrial relations law: Trade union discipline and non-strikers

Perhaps the most controversial change introduced in the 1988 Employment Act was the statutory right given to union members not to be disciplined by their unions for continuing to work during lawful industrial action approved by a majority in a secret ballot. Here the authors examine the legal contexts, implications for trade unions and the wider industrial relations and political significance of this important new right.     

THE BUS INDUSTRY IN DANGER

After seeking to placate the local government lobby while retaining the benefits of private enterprise, the Labour government's policy for bus services is slipping into a dangerous compromise which will neglect the market while seizing assets from commercial operators. Behind this lies a policy leading to the return of bus services to public ownership.     

Residual income claimancy,monitoring, and the R&D firm: Theory with application to biotechs

This paper models the assignment of residual income claimancy to an R&D manager and applies the model to biotechnology firms. Residual income claimancy provides incentives for the manager to monitor the R&D process. Since the nature of R&D and of monitoring scientific effort is different, our model predicts stark differences in the residual income claimancy of managers and in other aspects of organization for innovative R&D firms like biotechs. In particular, R&D firms are expected to be more owner‐managed, more expert‐managed, and smaller in size. Cross‐sectional data on biotechnology firms is consistent with these implications. Additionally, longitudinal data indicate that as firms alter their focus on biotech research, their organizational structure changes as expected. Our approach suggests a process of firm and industry evolution related to technological maturity and points to the importance of incentives rather than risk sharing in determining organizational form, similar to the original analysis of franchising. Copyright © 2004 John Wiley & Sons, Ltd.