IHP Working Paper Series documents the results of work by IHP
researchers and collaborators that do not warrant full formal
publication in the Research Paper or Technical Paper series. The
series is used primarily as a channel to promote timely dissemination
of work in progress, or final dissemination of research and methodological
findings, which may be of interest only to a small technical audience.
They may be preliminary and unpolished results of analysis, and
have not necessarily been subject to the same level of editing
and review as Research and Technical papers. In certain instances,
Citation and use of these papers should take into account their
potentially provisional nature.