Includes Arrow's conference and public lecture presentations and administrative work for various committees and institutions, as well as his work as a paid consultant on several projects. The latter includes three extended projects, one on economic growth and policy for the Canadian Institute for Advanced Research, one on climate change for the National Academy of Sciences and one on contingent valuation (the use of surveys to value public goods) for the National Oceanic and Atmospheric Association. The former includes work for the American Economic Association, International Economic Association, National Bureau of Economic Research, as well as for the City College of New York, the European Bank for Reconstruction and Development, RAND, Beijer, the National Science Foundation, the American Academy of Arts and Sciences, the Nobel nomination committee, and numerous other organizations.

This subseries contains files and documentation of Arrow's speaking engagements.

Arrow acted as an expert witness in several court cases in the State of California and nationally. Cases are arranged alphabetically and include trial transcripts, notes, testimony, and correspondence.

Contains files documenting Arrow's personal and political activities. Notable topics include his work for peace in the Middle East, for arms control, and in support of human rights and dissidents.