What drives the spread of non-infectious diseases? We study this question in the context of the opioid epidemic. Having many friendship links to counties with high exposure to the opioid epidemic positively correlates with overdose death rates. This correlation is not driven by physical...

We analyze liquidity provision on Kraken, one of the major cryptocurrency exchanges, and compare the results to the foreign exchange (FX) and the stock market, recognizing that Bitcoin has originally been designed as a digital currency and evolved to an investment. In a first step, we...