Lawrence Lessig/blog/2002/11/27/1203/3

responds to::Lawrence Lessig/blog/2002/11/27/1203 when posted::November 28, 2002 11:05 AM author::Glenn Fleishman URL/author::http://blog.glennf.com This analysis is problematic because the methodology of determining which works from each year is still "in print" has to be done through tedious human analysis. ISBN numbers only began to be assigned in the 1970s (as SBNs) and I believe it wasn't a widespread practice until the 1980s. This means that titles in print from before the 1970s have to be looked at individually and with author names to determine if any instanciation of the work in question is still in print today.

This doesn't reduce the value of the analysis, but where is the methodology so we can determine how they handled the overlap (or lack thereof)?