txt: Add grey lit search protocol
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@ -97,13 +97,20 @@ based on the above definitions.
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The search protocol then follows a three-staged process of execution: identification, screening and extraction.
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First, in identification, the above categorizations are combined through Boolean operators to conduct a search through the database repository Web of Science.
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<!-- TODO why WOS database? -->
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The search istelf is conducted with English-language search queries only.
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<!-- TODO grey lit? -->
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The search itself is conducted with English-language search queries only,
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connecting the various clusters with logical 'and' connectors, excluding partial matches,
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while synonymous or related terms are connected with logical 'or' connected, allowing partial matches.
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<!-- TODO will we be using lit? -->
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The search may also include other database repositories such as Google Scholar,
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in order to catch possible grey literature.
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For database repositories which do not allow a precise enough query,
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splits are introduced at term cluster edges,
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in order to enable later intersection joins (or 'inner merges') based on common DOIs, URLs or a combination of author and title.
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Relevant results are then complemented through the adoption of a 'snowballing' technique,
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which analyzes an array of published reviews for their reference lists to find cross-references of potentially missing literature.
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<!-- TODO AUTOMATE NUMBER GENERATION -->
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The execution of queries results in an initial sample of 2169 studies after the identification process.
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Currently execution of queries would result in an initial sample of 2169 studies after the identification process.
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The majority of studies result from the 'income' inequality cluster of the boolean search,
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with horizontal cluster terms used often but rarely on their own.
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@ -127,7 +134,8 @@ These two delineations follow the ILO categorizations on world regions and the c
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Similarly, if a specific type of inequality,
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or a specific intervention, represents the focus of a study,
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these will be reflected in the same keyword system, through for example 'inequality::income' or 'inequality::gender'.
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these will be reflected in the same keyword system,
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through for example 'inequality::income' or 'inequality::gender'.
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The complete process of identification and screening is undertaken with the help of the Zotero reference manager,
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ultimately leaving only publications which are relevant for final full-text review and analysis.
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