This questionnaire was developed in the early 1990s for the study of concessive conditional clauses
(adverbial clauses introduced by 'even if', 'whether...or', or 'wh-ever') in European languages.
It asks about the structure of these clauses and gives typical examples. Some of the results were
published in the following paper:
Martin Haspelmath & Ekkehard König. 1998. "Concessive conditionals in the languages of Europe."
In: van der Auwera, Johan (ed.) Adverbial constructions in the languages of Europe.
(Empirical Approaches to Language Typology/EUROTYP, 20-3.) Berlin: Mouton de Gruyter, 563-640.
Martin Haspelmath and Ekkehard König