Forecasting conflict in Africa with automated machine learning systems
Forecasting conflict in Africa with automated machine learning systems
复制标题
使用自动化机器学习系统预测非洲冲突
DOI:
10.1080/03050629.2022.2017290
复制
发表时间:
2022
影响因子:
1.3
通讯作者:
Lin, Yu
中科院分区:
文献类型:
--
作者:
D’Orazio, Vito;Lin, Yu
The ViEWS problem is to forecast changes in the level of state-based violence for each of the next six months at the PRIO-GRID and country level. For this competition and toward the goal of improving sub-national and country level forecasts, we experiment with combinations of automated machine learning (autoML) systems and limited datasets that emphasize the endogenous nature of conflict. Two core findings emerge: autoML improves predictive performance and the Dynamics model performs best. The data used for the Dynamics model is limited to measures of state-based violence built from the event-level violence data plus those describing the spatial and temporal structure of the data. The intent is to capture spatial and temporal conflict dynamics while not overfitting to exogenous factors, which is especially problematic with flexible autoML algorithms and the types of highly disaggregate data used here. At the PGM level, this model won the ViEWS competition for “predictive accuracy” and split the win for “originality.” Beyond the ViEWS competition, we expect conflict forecasting models that couple advanced autoML systems with variables that reflect a diverse set of conflict dynamics to have high predictive performance, especially at sub-national and sub-annual aggregations.
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DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
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通讯作者:
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影响因子:
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DOI:
--
发表时间:
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