We consider the activity-based costing situation, in which for each of several comparable operational units, multiple cost drivers generate a single cost pool. Our study focuses on published data from a set of property tax collection offices, called rates departments, for the London metropolitan area. We define what may be called benchmark or most efficient costs per unit of driver. A principle of maximum performance efficiency is proposed, and an approach to estimating the benchmark unit costs is derived from this principle. A validation approach for this estimation method is developed in terms of what we call normal-like-or-better performance effectiveness. Application to longitudinal data on a single unit is briefly discussed. We also consider some implications for the more routine case when costs are disaggregated to subpools associated with individual cost drivers.

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Under rationality, firms should shift to alternative earnings management methods to achieve their earnings management goals whenever the alternatives provide greater benefit. New accounting regulation can alter the net benefit derivable from existing earnings management methods and thus may provide the impetus for method-shifting. This study investigates whether firms circumvent regulatory-imposed restrictions on their use of specific methods for accelerating earnings by shifting to alternative methods. Specifically, the study examines whether the US's adoption of a reporting standard that placed restrictions on the recognition of software revenue prompted US software-firm managers to method-shift to expense components for accelerated earnings reporting. A comparison of discretionary revenue and expense accruals and discretionary R&D expenses before and after the adoption of the standard confirmed a reduction of accelerated revenue recognition after the adoption and supported the hypothesized method-shift to expense components for accelerated earnings reporting. Copyright (c) 2010 Blackwell Publishing Ltd.