The first RIAs are generally considered to be the "inflation impact assessments" required by the Carter Administration in the United States from 1978. The RIA requirement was broadened during the Reagan administration, with
benefit–cost analysis becoming the required methodological approach. Another early adopter of a RIA requirement was Australia (1985). By the mid-1990s approximately 12
OECD countries had implemented RIA requirements of some form, although the scope of the required analysis varied considerably. By 2000, 20 of 28 OECD countries had implemented RIA requirements. Currently, virtually all OECD countries use RIA. RIA requirements had also begun to be strongly promoted to its client countries by the
World Bank. As a result, an increasing number of developing countries have now adopted RIA requirements. RIA requirements have broadened in scope over time in many countries in which they have been adopted. Conversely, few if any countries have abandoned the use of RIA after having adopted it. == Australia ==