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Type of data, methods and the results.
| Type of Data | Unit of Analysis | Analytical Methods | Presentations of Results |
|---|---|---|---|
| Keywords, Countries | Words | Frequency of co-occurrence | (1) Map of keyword clusters |
| Abstracts | Papers | Latent Dirichlet Allocation | (2) 10 classifications of research topics |
| Web of Science (WOS) classification of research areas | WOS research areas | Frequency of co-occurrence | (3) Dendrogram of research disciplines (WOS classification) |
