World Development Report 2021 - Figures 2.5 and 2.7

Figure 2.5 Lower-income countries are less likely than other countries to adhere to international best practice statistical standards and methodologies
Figure 2.7 Most countries do not fully fund their national statistical plans
Main Source: WDR 2021 team calculations, based on World Bank, Statistical Performance Indicators (database).
The World Bank’s Statistical Performance Indicators (SPI) measure statistical performance across 174 countries. The indicators are grouped into five pillars: (1) data use, which captures the demand side of the statistical system; (2) data services, which looks at the interaction between data supply and demand such as the openness of data and quality of data releases; (3) data products, which reviews whether countries report on important indicators; (4) data sources, which assesses whether censuses, surveys, and other data sources are created; and (5) data infrastructure, which captures whether foundations such as financing, skills, and governance needed for a strong statistical system are in place.