Defence date: 27 February 1990Examining board: Prof. P. Dehez, supervisor ; Prof. M. Hellwig, University of Basel ; Prof. A. Kirman, EUI ; Prof. A. Montesano, Bocconi University, Milano ; Prof. L. Philips, EUIPDF of thesis uploaded from the Library digitised archive of EUI PhD theses completed between 2013 and 2017-- Imperfect information and financial markets : a general equilibrium model -- A competitive model of credit intermediation -- Asymmetric information and equilibrium credit rationing : a surveyAn earlier version of chapter 1 'Imperfect information and financial markets : a general equilibrium model' appeared as EUI working paper 1989/390. An earlier version of chapter 2 'A competitive model of credit intermediation' appeared as ...