Competition and Regulation in the Postal and Delivery Sector
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Competition and Regulation in the Postal and Delivery Sector

Edited by Michael A. Crew and Paul R. Kleindorfer

orldwide, postal and delivery economics has attracted considerable interest. Numerous questions have arisen, including the role of regulation, funding the Universal Service Obligation, postal reform in Europe, Asia and North America, the future of national postal operators, demand and pricing strategies, and the principles that should govern the introduction of competition. Collected here are responses to these questions in the form of 24 essays written by researchers, practitioners, and senior managers from throughout the world.
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Chapter 5: Forecast Uncertainty in Dynamic Models: An Application to the Demand for Mail

Catherine Cazals, Jean-Pierre Florens and Frank Rodriguez


* Catherine Cazals, Jean-Pierre Florens, Frank Rodriguez and Soterios Soteri 1. INTRODUCTION National postal operators use a variety of techniques to generate projections of the mail market to inform financial and strategic planning decisions. In the UK, for example, Royal Mail uses econometric time series models to produce business projections and to provide a framework to analyse and understand the evolving nature of the demand for mail in the UK (Nankervis et al., 2002). Other national postal operators, such as Finland Post and the United States Postal Service, also possess detailed econometric models which they use extensively for projection and scenario analysis purposes. However, while the reporting and use of such models has tended to be reasonably well documented within the postal economics literature,1 relatively little quantitative analysis has been undertaken on the uncertainty surrounding volume projections. Understanding the nature and extent of mail volume uncertainty is necessary to assess appropriately business and policy-related risks. This chapter attempts to bridge this information gap. In particular, we use an econometric time series model of the demand for mail to identify potential sources of model-based projection errors and via the use of Monte Carlo simulation techniques obtain quantitative estimates of the uncertainty surrounding such projections. The results provide a number of insights into the level of uncertainty surrounding projections of mail volumes using time series econometric models. We proceed as follows. Section 2 provides an overview of the nature of forecasting errors that could arise from time series econometric models. Section 3...

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