Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Applying the methods of Phillips et al. (2015, PSY), while considering the possibility of non-stationary volatility (Harvey et al., 2016), evidence of exuberance in share prices is confirmed for the South Sea Company, and established for a number of other 18th century financial organisations, for the first time. The timings of these bubble episodes show signs of possible contagion.