In the recent financial crisis, risk management tools have been proven inadequate. Model risk, a key component of bank risk, has shown its negative impact. It seems that risk models did not cover the included risks comprehensively and were not kept up-to-date by banks, and also rating agencies....

Crowdfunding, a novel form of financing, has seen massive growth over the last few years. Under crowdfunding, a large number of small households offers small loans to a firm. But if some threshold is missed, the firm cannot draw the loans. We construct a model to argue that this mechanism can be...