Statistical Disclosure Control Methods for Census Frequency Tables

This paper provides a review of common statistical disclosure control (SDC) methods implemented at statistical agencies for standard tabular outputs containing whole population counts from a census (either enumerated or based on a register). These methods include record swapping on the microdata prior to its tabulation and rounding of entries in the tables after they are produced. The approach for assessing SDC methods is based on a disclosure risk–data utility framework and the need to find a balance between managing disclosure risk while maximizing the amount of information that can be released to users and ensuring high quality outputs. To carry out the analysis, quantitative measures of disclosure risk and data utility are defined and methods compared. Conclusions from the analysis show that record swapping as a sole SDC method leaves high probabilities of disclosure risk. Targeted record swapping lowers the disclosure risk, but there is more distortion of distributions. Small cell adjustments (rounding) give protection to census tables by eliminating small cells but only one set of variables and geographies can be disseminated in order to avoid disclosure by differencing nested tables. Full random rounding offers more protection against disclosure by differencing, but margins are typically rounded separately from the internal cells and tables are not additive. Rounding procedures protect against the perception of disclosure risk compared to record swapping since no small cells appear in the tables. Combining rounding with record swapping raises the level of protection but increases the loss of utility to census tabular outputs. For some statistical analysis, the combination of record swapping and rounding balances to some degree opposing effects that the methods have on the utility of the tables.     

Understanding Firm, Physician and Consumer Choice Behavior in the Pharmaceutical Industry

This paper argues that the pharmaceutical industry represents an exciting opportunity to carry out academic research. The nature of the industry allows researchers to answer new questions, develop new methodologies for answering these questions as well as to apply existing methodology to new data. The paper opens with some industry background, then provides a brief overview of some important research areas and discusses the open questions in each area. Issues of data type and availability are also discussed. This paper is based on a session (with the same title and participants) that was part of the Sixth Invitational Choice Symposium hosted by the University of Colorado and held at Estes Park, Colorado during June 4–8, 2004.     

Guest Editorial

Abstract

While some Internet-only retailers survive and prosper, for most, multichannel retailing provides a sustainable and attractive blend of new and existing retail formats. The complementary roles of stores and Internet are frequently noted, yet the renewed significance of catalogues is often ignored. This paper is based upon a survey of 2,341 shoppers across three product sectors and three shopping scenarios, identifying their relative utilization of, and attitudes towards, stores, catalogues and the Internet.

Principal component analysis and multi-attribute analysis (MAA) scores summarize attitudes across the three channels, sectors and motivational scenarios. Four major components in channel choice emerge consistently: risk reduction, product value, ease of shopping and experiential. K-Means clustering on preference and behavioural variables identifies the truly multichannel shopper segment. Key characteristics of these shoppers are summarized, demonstrating that the multichannel shopper comprises a large and mainstream segment. Implications are identified for retailers and researchers.     

Applying Conceptual Framework Principles to Superannuation1 Fund Accounting

The Australian accounting standard AAS 25, Financial Reporting by Superannuation Plans, was the first pension accounting standard internationally to apply established conceptual framework (CF) principles. In Australia those principles have guided standard setting for more than a decade. However, AAS 25 has been criticized for failing to provide useful financial information. The analysis provided in this article addresses this paradox. The findings reveal major anomalies in AAS 25 associated with the treatment of accrued benefits that distort financial position and performance measures. The conceptual flaws in the standard are attributed to the misapplication of CF principles and an absence of adequate guidance in the CF for non‐corporate entities such as superannuation funds. Distorted financial information produced by superannuation plans has potential undesirable taxation and social outcomes. Consequently, there is an urgent need to update the Australian and international conceptual frameworks to provide guidance for revising accounting standards that better reflect current fiduciary and ownership relationships in non‐corporate entities such as superannuation funds.     

Are Superannuation Disclosures in Company Financial Reports Useful?

An analysis of superannuation disclosures in the financial reports of 120 public companies shows surprisingly frequent instances of non-compliance with AASB 1028. This is attributed to inherent weaknesses in the mandatory disclosure requirements. Significant problems include inconsistencies in the reporting of information about hybrid superannuation funds sponsored by companies, absence of timeliness, and non-disclosure of contribution holidays. These findings suggest that present superannuation disclosure requirements do not meet the objective of providing useful information for decision-making.     

Communicating with the public during health crises: experts' experiences and opinions

Governments and health agencies worldwide are planning for a potential influenza pandemic. Their plans acknowledge the importance of public communication during an outbreak and include related guidelines and strategies. Emerging infectious disease (EID) communication is a new addition to the literature, drawing on health promotion communication, crisis communication and environmental/technological risk communication. This paper adds to the literature, exploring the notion of ‘effective communication during health crises' by reporting on interviews with 22 public health officials, scientists and communications professionals responsible for communicating with the public. When analyzed in the context of the risk communication literature, the interviews reveal several considerations for health risk communicators. First, given the important role that mass media will play in an EID outbreak, there is an urgent need for public health to build partnerships with journalists based on an understanding of the two parties' unique societal roles. Second, seemingly practical communications considerations – such as how certain to be about information before sharing it and whether to engage in two‐way communication with the public – have ethical dimensions that deserve attention. Third, there are unique challenges associated with communicating uncertainty, which would benefit from an exploration of the role of trust in health crisis communication.