| Author(s) |
Edited by Louise de Villiers, Michael Brown, Ingrid Woolard, Reza Daniels and Murray Leibbrandt |
| Date |
2014-02-01 |
| Country |
South Africa |
| Language |
English |
| Publisher(s) |
National Income Dynamics Study |
| Description |
This is the user guide for the survey |
| Table of contents |
List of Contributors ................................................................................................................................. v
Foreword ................................................................................................................................................ vi
1. Using This Manual ........................................................................................................................... 1
1.1 What All Users Have To Know ................................................................................................. 1
1.2 Citation Of NIDS Data And Documentation ............................................................................ 1
2. The NIDS Data ................................................................................................................................. 2
2.1 Process To Download The Data .............................................................................................. 2
2.2 Data Formats ........................................................................................................................... 3
2.3 Data Structure ......................................................................................................................... 3
2.4 File Structure ........................................................................................................................... 4
2.5 Identifiers ................................................................................................................................ 5
2.6 Merging Datasets Within & Between Waves .......................................................................... 5
2.6.1 Merging within Wave 3 ................................................................................................... 6
2.6.2 Merging between waves ................................................................................................. 6
2.7 Variable Naming Convention .................................................................................................. 7
2.7.1 Wave ............................................................................................................................... 7
2.7.2 Source ............................................................................................................................. 7
2.7.3 Section leaders ................................................................................................................ 7
2.7.4 Subsections ..................................................................................................................... 8
2.7.5 Descriptors ...................................................................................................................... 8
2.7.6 Sub-questions .................................................................................................................. 8
2.8 Non-Response Codes .............................................................................................................. 8
2.9 Anonymisation ........................................................................................................................ 9
2.10 Secure Data ............................................................................................................................. 9
2.11 Program Library ...................................................................................................................... 9
3. Data Collection .............................................................................................................................. 10
3.1 Data Collection Process ......................................................................................................... 10
3.1.1 Overview of CAPI cycle .................................................................................................. 11
3.1.2 Overview of the tracking process ................................................................................. 12
3.1.3 Contacting respondents ................................................................................................ 14
3.2 Data Quality Issues And Data Collection ............................................................................... 14
3.2.1 Unit non-response ........................................................................................................ 14
3.2.2 Item non-response ........................................................................................................ 16
3.2.3 Data consistency ........................................................................................................... 16
3.2.4 The mechanics of data quality checks .......................................................................... 17
3.3 Fieldwork Schedule ............................................................................................................... 19
3.3.1 Pre-test .......................................................................................................................... 19
3.3.2 Main data collection ..................................................................................................... 19
3.4 Response Rates & Attrition ................................................................................................... 19
4. Derived Variables .......................................................................................................................... 23
4.1 Best Variables ........................................................................................................................ 23
4.2 Geography ............................................................................................................................. 23
4.3 Occupation ............................................................................................................................ 23
4.4 Industry ................................................................................................................................. 24
4.5 Employment Status ............................................................................................................... 24
4.6 Income .................................................................................................................................. 24
4.6.1 Bracket responses ......................................................................................................... 26
4.6.2 Item non-response and imputation .............................................................................. 27
4.6.3 Income from subsistence agriculture ........................................................................... 28
4.6.4 Bonus payments ............................................................................................................ 28
4.7 Expenditure ........................................................................................................................... 29
4.7.1 Imputations ................................................................................................................... 29
4.8 Anthropometric Z-Scores ...................................................................................................... 30
4.8.1 Important note about using the publically released NIDS data to create your own z-scores 31
4.9 Weights ................................................................................................................................. 32
4.9.1 What is new? ................................................................................................................. 32
4.9.2 The relationship between the different weights .......................................................... 32
4.9.3 Design weights .............................................................................................................. 34
4.9.4 The calibrated weights .................................................................................................. 34
4.9.5 Panel weights ................................................................................................................ 36
4.9.6 A final comment on the weights ................................................................................... 39
5. Program Library ............................................................................................................................ 40
5.1 Data Manipulation ................................................................................................................ 40
5.1.1 Merging datasets .......................................................................................................... 40
5.1.2 Reshaping data .............................................................................................................. 40
5.2 Derived Variables .................................................................................................................. 40
5.2.1 Income .......................................................................................................................... 40
5.2.2 Expenditure ................................................................................................................... 41
5.2.3 Deflator ......................................................................................................................... 41
5.2.4 Employment status ....................................................................................................... 42
6. References .................................................................................................................................... 43 |
| Download |
https://datacatalog.ihsn.org//catalog/5553/download/66638 |
