Most of Fischer's outgoing letters and memoranda are accompanied by incoming communications. The majority of the letters in this series concern Fischer's contacts with fellow economists and professional and international organizations outside the Bank. Included are: Fischer's letters accepting and declining invitations to speak or otherwise participate in conferences, institutes, symposia, and professional meetings; his responses to letters suggesting topics for his future research and writing; and his responses to letters requesting Fischer's comments on papers and to letters commenting on his papers and other writing. Some incoming letters and memoranda contain Fischer's annotations regarding the response to be prepared.

The remainder of the series includes: Fischer's letters of invitation sent to academics and other outside economists to participate in informal workshops, seminars, and conferences sponsored (or co-sponsored) by the Bank; Fischer's thank you letters to participants following these events and to officials with whom he met during overseas trips; and occasional memoranda Fischer sent to individuals inside the Bank.