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Modeling credit risk with partial information

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This paper provides an alternative approach to Duffie and Lando [Econometrica 69 (2001) 633–664] for obtaining a reduced form credit risk model from a structural model. Duffie and Lando obtain a reduced form model by constructing an economy where the market sees the manager’s information set plus noise. The noise makes default a surprise to the market. In contrast, we obtain a reduced form model by constructing an economy where the market sees a reduction of the manager’s information set. The reduced information makes default a surprise to the market. We provide an explicit formula for the default intensity based on an Azéma martingale, and we use excursion theory of Brownian motions to price risky debt.

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en

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application/pdf

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http://eprints.lse.ac.uk/2840/1/Modeling_credit_risk_with_partial_information%28lsero%29.pdf

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