Each year, researchers at Harvard's Growth Lab release growth forecasts for the upcoming decade as well as annual rankings of countries by economic complexity. The Economic Complexity Index (ECI) ranking is a measure of the amount of capabilities and knowhow of a given country determined by the diversity, ubiquity, and complexity of the products it exports.

Growth projections are calculated through a process largely based on determining whether a country's economic complexity is higher or lower than expected given its level of income. We expect countries whose economic complexity is greater than we would expect for its level of income to grow faster than those that are "too rich" for their current level of complexity. In this data, a country's growth projection value for a given year is for the decade beginning with that year. For example, a value in a 2017 row is the projection of annualized growth for 2017–2027.