Average total (current, capital and transfers) general government expenditure per student in the given level of education, expressed in US$ at market exchange rates, in constant prices. The constant prices base year is normally three years before the year of the data release. Divide total government expenditure (in constant US$) for a given level of education (ex. primary, secondary) by total enrolment in that same level. This indicator is useful to compare average spending on one student between levels of education, over time, or between countries. Constant US$ allow comparing absolute values using a common currency, and taking into account the effect of inflation. This indicator should not be considered a unit cost, since it only includes what the government spends, and not total spending per student (including household contributions). Since it is a simple division of total government expenditure by the number of students at a given level, whether they attend public or private institutions, in countries where private provision and/or funding of education is higher the average amount per student will appear lower. For more information, consult the UNESCO Institute of Statistics website: http://www.uis.unesco.org/Education/