Entity Resolution
A technique in data engineering for identifying and linking records across different data sources that refer to the same entity. It supports point-in-time symbol mapping across multiple identifier types, such as ticker, CIK, LEI, and CUSIP.
Timeline (last 90 days)
Entity resolution further determines whether two records point to the same real object—the same property, the same owner.
Survivorship bias arises from keeping only samples that "survived to today"; the approach to handling it is to retain the complete history, fill the end of delisted companies' windows with delisting returns, and link tickers before and after name changes through entity resolution.
In entity resolution, a shortcut that raised the match rate by ten percentage points had only 38% accuracy against independent identifiers, so it was never released.
All Facts (3)
Entity resolution further determines whether two records point to the same real object—the same property, the same owner.
50%UnverifiedSurvivorship bias arises from keeping only samples that "survived to today"; the approach to handling it is to retain the complete history, fill the end of delisted companies' windows with delisting returns, and link tickers before and after name changes through entity resolution.
50%UnverifiedIn entity resolution, a shortcut that raised the match rate by ten percentage points had only 38% accuracy against independent identifiers, so it was never released.
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