Maarten Janssen

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Consider a Bertrand model in which each rm may be inactive with a known probability, so the number of active rms is uncertain. This activity level can be endogenized in any of several ways{ as whether to incur a xed cost of activity, as output choice, or as quality choice. Our model has a mixed-strategy equilibrium, in which industry pro ts are positive and(More)
We present the COPLE2 corpus, a learner corpus of Portuguese that includes written and spoken texts produced by learners of Portuguese as a second or foreign language. The corpus includes at the moment a total of 182,474 tokens and 978 texts, classified according to the CEFR scales. The original handwritten productions are transcribed in TEI compliant XML(More)
POS Taggers typically fail to correctly tag grammatical neologisms: for a known word, most taggers will only take known tags into account, and hence discard the possibility that that word is used in a novel or deviant grammatical category in a new text. Grammatical neologisms are relatively rare, and therefore do not pose a significant problem for the(More)
Currently, there is a large number of lexical resources available: GENELEX, PAROLE, EuroWordNet and its follow-ups like GermaNet, MultiWordNet, etc. With this multitude of resources, the need arises for standardisation, in the guise of for instance the EAGLES, ISLE/ MILE, EMELD, and TC37/SC4 projects. A current attempt in these standardisation framework is(More)
This article shows the use of lexical functions in the MorDebe lexical database system. Lexical functions are used in MorDebe to bridge the gap between derivation and inflection – to model relations between word-forms that are derivational from one perspective but inflectional from another. However, lexical functions in MorDebe range over lemmas rather than(More)
A large variety of markets, such as retail markets for gasoline or mortgage markets, are characterized by firms offering a fairly homogenous good produced at virtually the same cost. The present paper provides a theoretical examination of this type of market by developing a sequential search model with incomplete information where consumers are uninformed(More)
A large variety of markets, such as retail markets for gasoline or mortgage markets, are characterized by a small number of firms offering a fairly homogenous product at virtually the same cost, while consumers, being uninformed about this cost, sequentially search for low prices. The present paper provides a theoretical examination of this type of market,(More)