Table 2.
Value of α at n | Type of correlation | Nature of correlation | Effect on data |
---|---|---|---|
>0.5 | Persistence | Positive (negative) increment followed by positive (negative) increment | Expansion |
<0.5 | Anti-persistence | Positive (negative) increment followed by negative (positive) increment | Contraction (stabilization) |
=0.5 | Brownian motion | No correlation between increments | (No control) |