Producer price indices volume 2002, Supplement 2
Statistical methodological information for international comparisons
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1.4 Statistical methodological information for international comparisons
Much of the discussion on the reliability of statistics centres on issues of “data quality”. Without going into too much detail on what is meant by the term, it is sufficient to say that it embodies a number of dimensions including relevance, accuracy, credibility, timeliness, punctuality, accessibility, interpretability, coherence, cost-efficiency 3 and, in the international context, comparability. 4 1 Existing international classifications are also listed on a Eurostat site- http://europa.eu.int/comm/eurostat/ramon 2 Eurostat guidelines, delivered in the form of “Council Regulations”, are binding for European Union member countries and are therefore normally more specific with regard to the statistical characteristics of data than recommendations issued by other international organisations. These Regulations are also being adopted by many eastern and southern European countries as part of the process for gaining membership to the European Union. 3 Quality Framework for OECD Statistics, presented at the OECD meeting of the High Level Group on Statistics, Paris,13 June 2002. Available at http://www.oecd.org/doc/m00029000/m00029990.doc 4 Issues relating to data quality and international comparisons are described in detail in the paper, International Comparability and Quality of Statistics, Raoul Depoutot and Philippe Arondel, published September 1998 in the proceedings of an international conference on Analysis of Economic (Micro) Data 1997 (CAED97) held at Bergamo, Italy, on 15-17 December 1997. This paper outlines a number of approaches to the issue of international statistical comparability. These comprise the: “uniform approach” which entails attempting to define exactly the same concepts and the same measurement process to produce output as though it were produced in the same country; 11 Price Indices © 2002 In recent years greater emphasis has been given to the importance of ensuring that statistics published by international organisations, national statistical institutes and other agencies are accompanied by adequate methodological information. The provision of such methodological information arises from a desire to lend transparency to the data so that the typical end-user can make an informed assessment of their usefulness and relevance to his or her purpose. However, the notion of the end-user referring to detailed methodological information is somewhat idealistic and seldom occurs in reality. In recognition of this, the approach for presenting methodological information for MEI is similar to one described by Eurostat 5 in that such information is best presented as layers within a pyramid. In the model presented in Diagram 2, for any specific statistical series (e.g. CPI, PPI, industrial production index, unemployment rate, etc.) methodological information describing the data becomes more detailed as one moves down from the apex of the pyramid. A brief description of each layer in the pyramid in the context of MEI is provided below: • Table headings and footnotes – Are an integral part of each statistical table published in MEI. The aim is to make table headings clear and as brief as possible. Footnotes are also kept to a minimum and are restricted to those essential for an understanding of the data. • Explanatory notes – Are provided at the back of the MEI paper publication. They provide a brief general description of the indicator and an outline of key issues that can impact on the use of the data. In the main, the explanatory notes in MEI do not provide much detail on individual country methodology/practices. • Sources and definitions – Provide a brief outline of current national practices for each country summarised under four broad headings (definition, coverage, collection and calculation). Sources and definitions metadata are published in a paper publication, on the OECD website ( http://www.oecd.org/std/meimeta.pdf ) and in the MEI CD-ROM where it is updated monthly. Sources used for updating the methodological information are national publications and national statistical agency websites, other international organisations and, in relatively few instances, direct contact with national data providers. The latest paper edition of the OECD publication, Main Download 465.51 Kb. Do'stlaringiz bilan baham: |
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