Preventive coercive measures are an increasingly common feature of the legal landscape. Examples are the preventive imprisonment of dangerous individuals after the expiration of their sentences, the involuntary commitment of dangerous individuals to mental institutions purely to protect the...

We introduce the Gerber statistic, a robust measure of correlation. The statistic extends Kendall's Tau by counting the proportion of simultaneous co-movements in series when their amplitudes exceed data-dependent thresholds. This is unlike the standard Pearson correlation that is sensitive to...