Provided is the appendix material from a study which examined and evaluated in detail all the existing sources of economic data on the arts and conducted a needs survey of arts councils, arts-producing organizations, and people concerned with the arts to find out which economic data sources, if any, they found useful. The study was conducted to assist the National Endowment for the Arts in making decisions about the Endowment's future role in the development of new, and improvement of existing, economic data on the arts and cultural institutions. The bulk of the appendix material describes in detail the characteristics of each of the 25 economic data sources studied. To ensure coverage of all relevant information and to allow comparisons across series, a set format is followed for each data source description. Information on how each data source collects and disseminates its data and how the data are used is included. Other information provided in the appendices includes project staff, persons and organizations contacted during the study, some responses from the mail survey of users, and a list of criteria against which a data series can be judged to evaluate its effectiveness. (RM)