Fig. 2. Cost to libraries (in constant 1996 US$$) per m² of printed area for representative journals, 1973, 1983, and 1993. For three society-published journals, average cost increased from $2.72 to $4.07; for four commercially published journals, average cost increased from $7.87 to $29.22.

[These data are from an unpublished 1994 study. During the current study, data for 1996 were added to the spreadsheet http://tjwalker.ifas.ufl.edu/cost2.xls, but they are not plotted here because they showed no change in the comparison of categories of publishers.]