This dataset contains all World Bank project assessments carried out by the Independent Evaluation Group (IEG) since the unit was created back in the 70s. Spanning over 30 years, the collection has more than 11,260 project assessments, covering more than 9,400 completed projects; it is perhaps the longest-running and most comprehensive project performance data collection of its kind. The dataset also includes references to over 6,500 source evaluation documents.