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Bulletin – March 2014
Equation (A3)
Δ
i
m
p
o
r
t
t
=
ω
1
+
ω
2
i
m
p
o
r
t
t
−
1
ω
3
d
o
m
t
−
1
+
ω
4
r
e
l
p
r
i
c
e
t
−
1
+
φ
1
Δ
d
o
m
t
+
φ
2
Δ
r
e
l
p
r
i
c
e
t
+
φ
3
Δ
i
m
p
o
r
t
t
−
2
+
τ
1
c
a
s
h
r
a
t
e
t
−
1
+
τ
2
Δ
i
n
v
e
n
t
o
r
y
t
+
∈
t
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