The other end of universals: theory and typology of rara / Michael Cysouw & Jan Wohlgemuth
Rarities in numeral systems / Harald Hammarström
Additional rarities in the typology of numerals / Thomas Hanke
Explaining typologically unusual structures: the role of probability / Alice C. Harris
Right at the left edge: initial consonant mutations in the languages of the world / Pavel Iosad
Quirky case: rare phenomena in case-marking and their implications for a theory of typological distributions / Andrej Malchukov
Negatives without negators / Matti Miestamo
Accounting for rare typological features in formal syntax: three strategies and some general remarks / Frederick J. Newmeyer
Rara and grammatical theory /Jan Rijkhoff
Pairwise comparisons of typological profiles / Søren Wichmann & Eric W. Holman
Language endangerment, community size and typological rarity / Jan Wohlgemuth.