MELTT: Merging Event Data by Location Time and Type

The growing volume of sophisticated event-level data collection, with improving geographic and temporal coverage, offers prospects for conducting novel analyses. In instances where multiple related datasets are available, researchers tend to rely on one at a time, ignoring the potential value of the multiple datasets in providing more comprehensive, precise, and valid measurement of empirical phenomena. If multiple datasets are used, integration is typically limited to manual efforts for select cases. My co-authors and I develop the conceptual and methodological foundations for automated, transparent and reproducible integration and disambiguation of multiple event datasets.

In a recent paper, we formally present the methodology, validate it with synthetic test data, and demonstrate its application using conflict event data for Africa, drawing on four leading sources (UCDP-GED, ACLED, SCAD, GTD). We show that whether analyses rely on one or multiple datasets can affect substantive findings with regard to key explanatory variables, thus highlighting the critical importance of systematic data integration.

To make the method accessible to all researchers, Karsten Donnay and I have developed an R package, which allows for easy implementation. The meltt package is now available on CRAN. Also, the project and code is up on Github where we provide a basic walkthrough of the package’s functionality.


(2018). Integrating Conflict Event Data. Journal of Conflict Resolution.

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