According to the data shown in the Congressional Budget Office‘s latest The Budget and Economic Outlook: From 2019 to 2029, there are $15.8 trillion US federal debt held by the public at the end of 2018.
In a recent IMF working paper "Overfitting in Judgment-based Economic Forecasts: The Case of IMF Growth Projections", economist Klaus-Peter Hellwig examined IMF's World Economic Forecasts (WEO) and check if the forecast model suffer from the problem of overfitting.
In a recent study "Bank Equity and Banking Crises" by Matthew Baron (of Cornell University), Emil Verner (MIT Sloan), and Wei Xiong (Princeton University), the three economists developed a comprehensive database of bank equity prices and banking crises with a full-sample of 46 countries from 1870-2016. They try to understand the dynamic between bank equity decline and banking crises.
The faster the credit growth, the worse it is for real growth (output per worker). This is what Stephen G. Cecchetti and Enisse Kharroubi want to explain in their NBER working paper "Why Does Credit Growth Crowd Out Real Economic Growth?"