The Open Data Initiative has made World Bank data available for everyone with no restrictions. You can sort through the Data Catalog to find the database of your interest. From there you will have direct and full access to all data resources available in the catalog. Please use the DataBank for accessing time-series data. You can choose countries, series, and years of your interest and create reports, maps, and charts.
For any data inquiries please contact the World Bank's Development Data Group
We also encourage you to explore the Open Data Initiative Blog.
Development economics research information is available here.
Tags: GDP, GNI, numbers, calculations, statistics, methodology, discrepancy