LSACDiscussionPaper3 - The Longitudinal Study of Australian...

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The Longitudinal Study of Australian Children Data Management Issues Discussion Paper Number 3 Robert Johnstone, the Project Operations Team and the LSAC Research Consortium i March 2004 LSAC was initiated, and is funded by, the Australian Government Department of Family and Community Services
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Contents Contents .................................................................................................................... 2 Introduction ............................................................................................................... 4 Data Management Principles ..................................................................................... 5 File Structure ............................................................................................................ 6 Principles of Proposed Data Structure ................................................................................... 6 File Format .............................................................................................................................. 6 Overview of the Survey Instruments ...................................................................................... 7 NCAC Data Linkage ............................................................................................................. 11 Variable Naming Conventions ............................................................................................. 12 Coding Framework & Data Dictionary ................................................................................ 13 Derived Variables ................................................................................................................. 14 Variable ‘Keys’ ..................................................................................................................... 15 Confidentialisation & Access ................................................................................... 18 Managing access to LSAC datasets ...................................................................................... 21 Data Security ........................................................................................................... 24 Legislation ............................................................................................................................. 24 LSAC and the Information Privacy Principles .................................................................... 24 Undertaking to Respondents ................................................................................................. 26 Data Imputation ....................................................................................................... 27 Non-response ......................................................................................................................... 27 Imputation in other Longitudinal Studies ............................................................................ 27 LSAC – Whether to Impute .................................................................................................. 28 Principles ............................................................................................................................... 28 Candidates for Imputation .................................................................................................... 28 Imputation over Time ........................................................................................................... 29 Imputation Method ................................................................................................................ 29 Outliers .................................................................................................................... 31 Weighting of Data .................................................................................................... 33 Principles ............................................................................................................................... 33 Issues Affecting Weights ...................................................................................................... 34 Calculation Procedures ......................................................................................................... 35 Respondent Tracking ................................................................................................ 39 Data Linkage ............................................................................................................ 41 Software Implementation ......................................................................................... 42 Software Selection - A Comparative Overview ................................................................... 42 Growing Up In Australia Data Management Discussion Paper 2
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Data Management ................................................................................................................. 45 Metadata ................................................................................................................................ 45 Transferring Files .................................................................................................................. 46 References ............................................................................................................... 48 Growing Up In Australia Data Management Discussion Paper 3
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Introduction This paper presents a discussion of the data management policy and procedures for Growing Up in Australia - the Longitudinal Study of Australian Children (LSAC). Growing Up in Australia is a major study funded by the Australian Government Department of Family and Community Services (FaCS) as part of the Australian Government’s Stronger Families and Communities Strategy . The Australian Institute of Family Studies is leading a consortium of nine eminent Australian research institutions in the development of this study, which will track the development of two cohorts of young children for at least 7 years. Growing Up in Australia is one of the largest and most complex studies of this nature that has ever been undertaken in Australia. The study aims to provide the data for a comprehensive understanding of Australian children’s development in the current and future social, economic and cultural environment, and hence to become a major element of the evidence base for policy and practice regarding children and their families. Growing Up in Australia is now also part of the Government’s move towards the development of a national agenda for early childhood. This paper discusses key data management issues associated with the project; namely: Data management principles File structure Data confidentialisation and access Data security Data imputation Outliers Weighting of data Respondent tracking Data linkage Software implementation This paper presents principles to guide policy and procedure, and in many cases oulines our currently preferred options. During the months before receipt of Wave 1 data these will be further considered and refined. We welcome comment from readers,
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