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Contents
1. INTRODUCTION ..............................................................................................................................5
1.1 THE 1998 WORKPLACE EMPLOYEE RELATIONS SURVEY ...............................................................5
1.2 THE CONTENT OF THE GUIDE ..........................................................................................................5
1.3 NOTATION USED IN THIS GUIDE ......................................................................................................6
1.4 FURTHER INFORMATION .................................................................................................................6
2. NECESSARY PREPARATION BEFORE BEGINNING YOUR ANALYSIS.............................9
2.1 WERS98 USER GUIDE AND VARIABLE NOTES...............................................................................9
2.2 STATA MEMORY ALLOCATION ......................................................................................................9
3. FINDING YOUR WAY AROUND THE WERS98 DATA FILES ..............................................11
3.1 WEIGHTED AND UNWEIGHTED DATA FILES ...................................................................................11
3.2 VARIABLE NAMING CONVENTIONS ...............................................................................................11
3.2.1 Variables in Mq98fin.*: ......................................................................................................11
3.2.2 Variables in Wrq98.*: .........................................................................................................12
3.2.3 Variables in Seq98.*:...........................................................................................................12
3.2.4 Variables in Pq_9098.* & Pq_98out.*: ..............................................................................12
3.3 THE LAYOUT OF THE DATA FILES ..................................................................................................13
3.3.1 Mq98fin.* and Wrq98.*: .....................................................................................................13
3.3.2 Seq98.*: ...............................................................................................................................14
3.3.3 Pq_9098.* & Pq_98out.*: ...................................................................................................14
3.3.4 Restricted data files: ............................................................................................................15
3.3.5 Final note:............................................................................................................................16
4. WEIGHTING ...................................................................................................................................17
4.1 THE 1998 CROSS-SECTION DATA (MANAGERS AND WORKER REPS)............................................17
4.1.1 Principles of weighting the 1998 data from managers and worker reps .............................17
4.1.2 Weight variables to be used in analysis of 1998 data from Managers and Worker Reps ....19
4.1.3 A practical example of the difference between weighting schemes......................................19
4.2 THE 1998 CROSS-SECTION DATA (EMPLOYEES) ............................................................................20
4.2.1 Principles of weighting the 1998 data from employees .......................................................20
4.2.2 Weight variable to be used in analysis of 1998 data from employees..................................21
4.3 THE 1990-98 PANEL DATA (PQ_9098.*) ......................................................................................21
4.3.1 Principles of weighting the 1990-98 panel data ..................................................................22
4.3.2 Weight variable to be used in analysis of the 1990-98 panel data.......................................22
4.4 THE 1998 OUTCOMES DATA (PQ_98OUT.*) ..................................................................................22
4.4.1 Principles of weighting the 1998 outcomes data .................................................................23
4.4.2 Weight variable to be used in analysis of the 1998 outcomes data......................................23
4.5 APPLYING AND REMOVING WEIGHTS ............................................................................................23
4.5.1 Applying and removing weights within SPSS.......................................................................23
4.5.2 Applying and removing weights within STATA....................................................................24
4.6 THE IMPLICATIONS OF SAMPLE DESIGN FOR STATISTICAL INFERENCE ..........................................26
4.6.1 Frequency analysis ..............................................................................................................29
4.6.2 Tabular analysis...................................................................................................................30
4.6.3 Regression analysis..............................................................................................................32
5. THE PRODUCTION OF HIGH QUALITY TABLES IN SPSS .................................................37
5.1 INTRODUCTION .............................................................................................................................37
5.2 PREPARATION ............................................................................................................................... 37
5.3 BASIC TABLE SPECIFICATION ........................................................................................................38
5.4 MORE COMPLEX SPECIFICATIONS .................................................................................................41
5.4.1 Summarising continuous variables ......................................................................................41
5.4.2 Aggregating continuous variables .......................................................................................42
5.4.3 Multiple-response items .......................................................................................................43
5.5 FINAL NOTES ................................................................................................................................45
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