1. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 Methods and Practices on Seasonal Adjustment in the European Statistical System (Handbook on Seasonal Adjustment) Project leader: Erika Földesi Presented by Tamás KOTULICS

2. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 2 Contents of the presentation  The main actions of the project  The aim of the Handbook  Structure and contents of the Handbook

3. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 3 Main Actions Preparatory phase of the project Collecting the current practices of statistical offices Create a website ( www.ksh.hu/hosa ) www.ksh.hu/hosa Analysing phase Analysing and comparing the collected practices Elaborating the recommended practices

4. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 4 Main Actions (cont.)‏ Draft version Compiling the draft version of the Handbook Collecting opinions about the draft Workshop Presentations about the best practices Discussing the draft version of the Handbook Compiling the Handbook Compiling the second draft version of the Handbook Collecting opinions on it Compiling the final version of the Handbook

5. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 5 Workshop  Budapest, 9 November 2006  32 participants from 23 countries  3 representatives from Eurostat and OECD  Programme:  presentation and discussion of the draft Handbook  presentations of the NSI’s representatives on  seasonal adjustment practices  quality aspects of seasonal adjustment process  presentation and discussion of the recommended practices and Quality Report on seasonal adjustment  Discussion on quality and software of seasonal adjustment – proposed by Statistics Sweden

6. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 6 The aim of the Handbook  To synthesize the applied seasonal adjustment practices and methods  To collect information on the quality of seasonally adjusted data production process  To publish a complete description on seasonal adjustment for all statistical offices in the European Statistical System which contains also  recommended practices  a proposal for quality report on seasonal adjustment.

7. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 7 Contents of the Handbook 1.Introduction 2.Brief Historical Background 3.Basic Definitions 4.Summary of Seasonal Adjustment Practices in NSI’s 5.Methods and Software 6.Recommended Practices for Seasonal Adjustment 7.Proposal for Quality Report on Seasonal Adjustment

8. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 8 Table of Contents - Annex I.Questionnaire for Handbook on SA II.Results III.NSI’s practices IV.Methods and Software V.Eurostat Recommendations VI.Quality Measures for Seasonal Adjustment VII.Proposal for Quality Report

9. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 9 Response rate

10. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 10 Seasonal adjustments methods used I.

11. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 11 Seasonal adjustments methods used II.

12. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 12 Seasonal adjustments methods used III.

13. Hungarian Central Statistical Office Handbook on Seasonal Adjustment STES WP 25-27 June 2007 13 Contact information Name:Erika Földesi Email: hosa@ksh.hu hosa@ksh.hu Web: www.ksh.hu/hosa www.ksh.hu/hosa Fax: +36-1-345-6681 Thank you for your kind attention!