1. This chapter describes some of the main characteristics of the prolonged users in terms of performance and key economic indicators and compares them with the characteristics of “temporary” users. Further details are provided in Annex 3. Differences in performance between the two groups obviously cannot be attributed in any simplistic way to prolonged use, or vice versa, since there are many other factors that could have influenced both economic performance and the need for prolonged use of IMF resources. Nevertheless, the comparison is relevant as a basic point of reference and points to structural features that should receive special attention in designing programs for these countries.