The study found that the average circulation for custom publication titles in 2008 increased 24% to 336,060. Frequency remained steady at nine times per year.
Economic trends are having an impact, however. The percentage of custom publications using paid advertising decreased 4%, the third annual decline in a row. The number of published custom titles decreased 14% to 123,157. Custom publishing expenditures were down 20%, although some of this was due to a shift to online distribution, according to CPC.
The CPC survey was distributed this past winter by mail across several industry groups. About 350 companies completed and returned the questionnaire.