| Author(s) |
Edited by Michael Brown, Reza C. Daniels, Louise De Villiers, Murray Leibbrandt and Ingrid Woolard |
| Date |
2014-02-28 |
| Country |
South Africa |
| Language |
English |
| Publisher(s) |
National Income Dynamics Study |
| Description |
This is the latest user manual for the survey |
| Table of contents |
List of Contributors ................................................................................................................................ iv
Foreword ................................................................................................................................................. v
1. Using This Manual ........................................................................................................................... 1
1.1 What All Users Have to Know ................................................................................................. 1
2. The NIDS Data ................................................................................................................................. 2
2.1 Citation of NIDS data and documentation .............................................................................. 2
2.2 Process to download the data ................................................................................................ 2
2.3 Data Formats ........................................................................................................................... 3
2.4 Data Structure ......................................................................................................................... 3
2.5 File Structure ........................................................................................................................... 4
2.6 Identifiers ................................................................................................................................ 6
2.7 Merging Datasets Within & Between Waves .......................................................................... 6
Merging Within Wave 1 or Within Wave 2 ..................................................................................... 7
Merging Between Waves ................................................................................................................ 7
2.8 Variable naming convention ................................................................................................... 7
2.9 Non-Response Codes .............................................................................................................. 9
2.10 Anonymisation ...................................................................................................................... 10
2.11 Secure data ........................................................................................................................... 10
2.12 Program Library .................................................................................................................... 10
3. Data Collection .............................................................................................................................. 11
3.1 Overview of CAPI Cycle ......................................................................................................... 12
3.2 Overview of the Tracking Process ......................................................................................... 13
3.3 Listing and Panel Data ........................................................................................................... 15
3.4 Contacting Respondents ....................................................................................................... 15
3.5 Data Quality Issues and Data Collection ............................................................................... 16
Unit Non-response ........................................................................................................................ 16
Item Non-Response....................................................................................................................... 17
Data Consistency ........................................................................................................................... 17
The Mechanics of Data Quality Checks ......................................................................................... 18
3.6 Fieldwork schedule ............................................................................................................... 20
Pre-test .......................................................................................................................................... 20
Main data collection ..................................................................................................................... 20
Phase 2 .......................................................................................................................................... 20
Questionnaire Differences between W2 Phase 1 & W2 Phase2 .................................................. 21
3.7 Response Rates & Attrition ................................................................................................... 21
4. Derived Variables .......................................................................................................................... 26
4.1 Best Variables ........................................................................................................................ 26
4.2 Geography ............................................................................................................................. 26
4.3 Occupation ............................................................................................................................ 27
4.4 Industry ................................................................................................................................. 27
4.5 Employment Status ............................................................................................................... 27
4.6 Income .................................................................................................................................. 28
Bracket Responses ........................................................................................................................ 30
Item Non-Response and Imputation ............................................................................................. 30
Income From Subsistence Agriculture .......................................................................................... 31
Bonus Payments ............................................................................................................................ 31
4.7 Expenditure ........................................................................................................................... 32
Imputations ................................................................................................................................... 32
4.8 Wealth ................................................................................................................................... 33
Wealth in the NIDS Wave 2 Household and Adult Questionnaires .............................................. 34
Imputation .................................................................................................................................... 35
Aggregating Household Net Worth and Including One-Shot Measures Where Appropriate ...... 37
4.9 Anthropometric Z-Scores ...................................................................................................... 37
4.10 Weights ................................................................................................................................. 38
Updated Wave 1 Weights ............................................................................................................. 38
Panel Weights ............................................................................................................................... 39
Cross-Sectional Weights for Wave 2 ............................................................................................. 40
5. Further Resources ......................................................................................................................... 42
5.1 Program Library .................................................................................................................... 42
Data manipulation ........................................................................................................................ 42
Derived variables .......................................................................................................................... 43
6. References .................................................................................................................................... 45 |
| Download |
http://catalog.ihsn.org//catalog/2390/download/66629 |
