According to the World Development Report, low-income economies are those for which the per capita Gross National Product (GNP) in 1994 was US $ 525 or less. This classification is based on the World Bank`s income classifications, which categorize economies based on their level of income per capita.

It`s important to note that these thresholds may have been updated since the publication of the report, as the World Bank periodically revises its income classifications to account for changes in economic conditions and inflation. Therefore, it`s recommended to refer to the most recent World Bank data for the latest income classifications.