Working Paper No. 1236

Credit Ratings and Structured Finance

Published: October 2, 2018, revised February 2019Pages: 41Keywords: Credit rating agencies; Reputation; Structured financeJEL-codes: G24; L14

Credit Ratings and Structured Finance Jens Josephson and Joel Shapiro


The poor performance of credit ratings of structured finance products in the financial crisis has prompted investigation into the role of credit rating agencies (CRAs) in designing and marketing these products. We analyze a two-period reputation model in which a CRA both designs and rates securities that are sold both to investors who are constrained to purchase highly rated securities and investors who are unconstrained. Assets are pooled and senior and junior tranches are issued with a waterfall structure. When the rating constraint is lax, the CRA will include only risky assets in the securitization pool, serving both types of investors without any rating inflation. Rating inflation is decreasing in the tightness of the rating constraint locally. But rating inflation may be non-monotonic in the rating constraint globally, with no rating inflation when the constraint is lax or tight.

Jens Josephson

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Global index of the sharing economy

Timbro SEI

2018 Bergh Funcke Wernberg - Timbro Sharing Economy Index-1fHemsidan.jpg

Andreas Bergh, IFN and Lund University, is one of the authors of this book. The Timbro Sharing Economy Index is the first global index of the sharing economy. The index has been compiled using traffic volume data and scraped data, and provides a unique insight into the driving factors behind the peer-to-peer economy.

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