A Model of Supplier Responses to Just-In-Time Delivery Requirements

When buyers provide incentives for suppliers to deliver just-in-time, suppliers can respond by choosing to hold additional inventory, reducing the variance of flow time to facilitate just-in-time production, or both. A model characterizing the supplier's optimal response to incentives for JIT delivery is presented. The model shows a situation where the optimal action of the supplier is to hold more inventory. When incentives for on-time delivery are increased, the supplier responds by decreasing the variance of flow time and by increasing the lead time allowance. However, the lead time allowance increases more quickly than the variance is reduced, resulting. in a net increase in the amount of inventory that must be held by the supplier. The result is that inventory is pushed upstream. This paper does not suggest that inventory is always pushed upstream in JIT purchasing. Rather, it provides a counter-example to those who presume that holding more inventory is always a non-optimal response to buyer's requests for JIT delivery.     

Updating the Determinants of Firm Performance: Estimation using the 1998 UK Workplace Employee Relations Survey

We examine the determinants of establishment performance in the UK, using cross‐sectional data from the 1998 Workplace Employee Relations Survey to replicate research by Fernie and Metcalf (1995) who used data from the 1990 Workplace Employee Relations Survey; specifically, we test whether employee representation, contingent pay and efforts to boost employee participation affect a set of economic and industrial relations outcome indicators in the manner they suggest. We also re‐estimate the influential WERS90‐based study of Machin and Stewart (1996) on the links between union status and financial performance. In both cases we report very different results.     

The Morishima gross elasticity of substitution

We show that the Hotelling–Lau elasticity of substitution, an extension of the Allen–Uzawa elasticity to allow for optimal output-quantity (or utility) responses to changes in factor prices, inherits all of the failings of the Allen–Uzawa elasticity identified by Blackorby and Russell [(1989) Am Econ Rev 79: 882–888]. An analogous extension of the Morishima elasticity of substitution to allow for output quantity changes preserves the salient properties of the original Hicksian notion of elasticity of substitution. We thank Paolo Bertoletti for drawing our attention to the issue addressed in this paper and for his comments on an earlier draft.     

Analyse de la libéralisation des échanges de quotas entre le Québec et l'Ontario dans le secteur laitier

L'objectif de cette étude est d'estimer les fonctions d'offre et de demande & quota de lait & transformation au Québec et en Ontario et d'évaluer les impacts potentiels d'un marché des quotas entre ces deux provinces. Les fonctions d'offre et de demande sont estimées par la méthode des moindres carrés à deux étapes et ce, pour quatre marchés, soit les marches des quotas produits et non produits dans chaque province.
Les résultats montrent que la flexibilityé de la demande est en général plus élévie en valeur absolue que celle de l'offre. Les résultats indiquent de plus que l'offre de quotas est élastique par rapport aux prix. Le modèle est utilisé pour simuler l'ouverture des marchés entre le Québec et l'Ontario. Les résultats indiquent que si un marché des quotas avait existé en 1992, le Québec aurait vu son quota de mise en marché augmenter de 3,4 % durant l'année, au détriment de l'Ontario qui aurait vu le sien diminuer d'environ 5,1%.     

Generalizing the OLS and Grid Estimators

The vast majority of market valuations employ either some formal estimator such as ordinary least squares (OLS) or rely upon an informal set of rules defining the grid adjustment estimator. The success of the grid adjustment estimator suggests the data do not obey the ideal assumptions underlying OLS. However, the grid adjustment estimator's lack of a formal statistical foundation makes it difficult to use for inference and other purposes. This article demonstrates how to generalize the grid estimator and OLS to potentially obtain the best features of both. Interestingly, the generalization defines a spatial autoregression. On an empirical example the spatial autoregression outperforms the grid estimator which in turn outperforms OLS.     

Analyzing Real Estate Data Problems Using the Gibbs Sampler

Real estate data are often characterized by data irregularities: missing data, censoring or truncation, measurement error, etc. Practitioners often discard missing- or censored-data cases and ignore measurement error. We argue here that an attractive remedy for these irregularity problems is simulation-based model fitting using the Gibbs sampler. The style of the paper is primarily pedagogic, employing a simple illustration to convey the essential ideas, unobscured by implementation complications. Focusing on the missing-data problem, we show dramatic improvement in inference by retaining rather than deleting cases of partially observed data. We also detail Gibbs-sampler usage for other data problems.     

The UK and the Euro: Debating the British Decision

This article seeks to inform and enliven the debate on whether or not Britain should join the euro. The central focus of the article involves interviews with two leading economists, Professor Willem Buiter (Chief Economist and Special Counsellor to the President, European Bank for Reconstruction and Development) who strongly supports the case for joining, and Professor Patrick Minford (Professor of Applied Economics, Cardiff Business School) who takes the opposite stance. The article begins with an introduction which places the interviews in context and concludes with a final section summarising the central points of commonality and departure arising in the interviews with Professors Buiter and Minford.     

Does exchange rate pegging enhance credibility? Evidence from the European Monetary System

The European Monetary System (EMS) has been credited with immediately enhancing the credibility of onetary policy among its member countries. However, there is little empirical evidence to support this view. This study provides evidence from exchange rate data that political actions taken to support the EMS enhanced rate arangement. Further, empirical results were sensitive to the specification of the estimating equations, and varied dramatically if risk premia (discounts) were absent from estimating equations.