Individual Source Data

The current xSub release features data on 156 countries from 21 sources, including

Multiple Source Data

In addition to the data collections above, xSub features several pooled, multiple-source datasets, integrated and disambiguated with the MELTT software package. These datasets combine events from our 21 collections, helping to offset under-reporting in each source with information from another. For details about MELTT’s underlying methodology, please see

  • Donnay, Karsten, Eric Dunford, Erin C. McGrath, David Backer and David E. Cunningham, “Integrating Conflict Event Data,” Journal of Conflict Resolution (forthcoming, 2018). https://doi.org/10.1177/0022002718777050

We currently provide 8 sets of integrated data, organized by the spatial, temporal and event taxonomy filters used to remove duplicate events:

  • Spatial filter (which events are ‘co-located’):

    • 1 km: contemporaneous events located within a 1 km radius of each other count as a single event

    • 5 km: contemporaneous events located within a 5 km radius of each other count as a single event

  • Temporal filter (which events are ‘contemporaneous’):

    • 1 day: geographically co-located events reported within 1 day of each other count as a single event

    • 2 days: geographically co-located events reported within 2 days of each other count as a single event

  • Dyad type:

    • A: directed (includes only events where initiator and target are both known)

    • B: undirected (all events, including those with some ambiguity over which actor was initiator vs. target)

    NOTE: ACLED and UCDP-GED contain only undirected dyad information. Most other sources include directed dyad information. Accordingly, type-A dyads exclude ACLED and UCDP-GED from the integrated event counts.

In all, we offer eight different sets of integrated, multiple-source data:

  • 1 km, 1 day, dyad type A (MELTT1km1dA)

  • 1 km, 1 day, dyad type B (MELTT1km1dB)

  • 5 km, 1 day, dyad type A (MELTT5km1dA)

  • 5 km, 1 day, dyad type B (MELTT5km1dB)

  • 1 km, 2 days, dyad type A (MELTT1km2dA)

  • 1 km, 2 days, dyad type B (MELTT1km2dB)

  • 5 km, 2 days, dyad type A (MELTT5km2dA)

  • 5 km, 2 days, dyad type B (MELTT5km2dB)

Of these, 1km1d has the most stringent standard for duplicates (resulting in more unique events), and 5km2d has the loosest (resulting fewer unique events).