Zero Categories: a typological dimension

We all need a formal typology of zero categories and explicit criteria for identifying zeros of different type. But which theory and what kind of criteria should be chosen?

See a draft version of recent talk on zero syntactic categories given at 4th conference on typology and grammar in Sankt-Peterburg, 6-8 November, 2008. There is a published Russian version, cf. Acta Linguistica Petropolitana, Vol. IV, part 2. Sankt-Peterburg, 2008, 226-244.
zero-lexemes-dogmatics-typology2