http://arxiv.org/ftp/cond-mat/papers/0605/0605511.pdf

9
Figure 2
| S
p
atiotempor
al scaling o
f
bank
note d
i
spersal.
a
, t
he probability density
z
W(
z
,
)
τ
of
having travell
ed a loga
rith
mic dista
n
ce
at logarithmic time
. The middle
se
g-
ment indi
cate
s the
scaling
regim
e
bet
ween o
ne
wee
k
an
d o
ne y
ear. Th
e
sup
e
rimp
osed
re
d line
rep
r
e
s
ent
s th
e scaling
beh
aviour
10
zl
o
g
r
=
10
lo
g
t
τ=
1/
r(
t)
t
μ
∼
with e
x
ponent
1
.
05
0.
0
5
μ
=±
. 
