1. Implementing Selective Editing and Its Reflection on the Data Quality (Business Survey 2012) Copyright © 2013 Statistics Centre - Abu Dhabi Authors : Azza Omer Mohammed Aleghefli Sara Al Dhaheri

2. www.scad.ae Content 2  Introduction to Abu Dhabi & UAE  SCAD Business Surveys  AES Editing Process  Re-designing the Editing Strategy  Selective Editing – Definition  Selective Editing used in AES 2012  Process of Selective Editing  Edit Reports  Findings

3. www.scad.ae 3 The Emirate of Abu Dhabi Almost 43 years since the formation of the UAE. UAE comprises Abu Dhabi plus six other Emirates. Abu Dhabi accounts for over 80 percent of UAE land mass. Abu Dhabi contains around one third of UAE population. Emirati citizens make up around 20 per cent of Abu Dhabi population. Abu Dhabi oil represents around 10 per cent of global reserves. Introduction

4. www.scad.ae SCAD is the official source of statistical data for Abu Dhabi. Celebrated five years of operation in April 2014. Operates in accordance with international best practice to provide range of statistics. Our Mission: 1. Develop and organize a statistical system in the Emirate. 2. Provide relevant and reliable official statistics serving policy makers, the business community and the public. 4 Statistics Centre – Abu Dhabi Introduction

5. www.scad.ae SCAD Business Surveys – known as Annual Economic Surveys (AES) key data source for the compilation of economic statistics. The survey results enable the construction of key economic indicators the GDP. The suites of Annual Economic Surveys have been conducted since 2007. AES 2012 sample size 2200 Establishments Collection period 5 months Paper questionnaire - commercial accounting 5 SCAD Business Surveys - 2013

6. www.scad.ae 6 AES Editing Process

7. www.scad.ae Questions driving the re-design of the editing strategy Do we need to re-validate every edit failure? How to leverage the automated editing to improve data quality? 7 Re-designing the Editing Strategy

8. www.scad.ae Procedure which targets only some of the micro data items or records for review - OECD Follow-up of validation failure for only those contributors where likely size of the correction is expected to make a material difference to the results – NSI 8 Selective Editing – Definition

9. www.scad.ae First time used in SCAD Business Surveys Method adopted was thoroughly reviewing, validating and editing key variables Optimized the sources available for editing data 9 Selective Editing used in AES 2012

10. www.scad.ae 10 Process of Selective Editing

11. www.scad.ae 11 Obs SECTORRecords Count Count OF TOTAL Edit Failures Count of RELATED Edit failure Count of LOGICAL Edit Failure 1SERVICES315176136 2TRADE1411904 3TRANSPORTATION7710115 4TELECOM3814010 5REAL ESTATE225015 6INDUSTRY33975673 7INSURANCE387022 8FINANCIAL SERVICES28815 9SME6384059 10HOLDING11302 CONSTRUCTION2081509 12BANKING276001 Total188223714351 Edit Report I: 18.09.2013

12. www.scad.ae Obs SECTORRecords Count Count OF TOTAL Edit Failures SUM OF RELATED FRQUENCY SUM OF LOGICAL FRQUENCY 1SERVICES329004 2TRADE150023 3TRANSPORTATION85002 4TELECOM45002 5REALESTATE22001 6INDUSTRY3480073 7INSURANCE39000 8FINANCIAL SERVICES30101 9SME639000 10HOLDING13002 11CONSTRUCTION223000 12BANKING32000 Total19551288 12 Edit Report: 10.10.2013

13. www.scad.ae Editing done in a timely manner Significant decrease of key variables edit failure Focused automated editing on a predefined set of records improve the data quality Enhancing the method by implementing the scoring techniques 13 Findings

14. www.scad.ae For more information please read the paper. Website: www.scad.aewww.scad.ae Authors: Azza Omer aaomer@scad.aeaaomer@scad.ae Mohamed Aleghefli: msaleghfeli@scad.aemsaleghfeli@scad.ae Sara Aldhaheri: saaldhaheri@scad.aesaaldhaheri@scad.ae 14 Contact

15. www.scad.ae 15