Research Discussion Paper – 1974
Equation (A.56)
P
N
•
=
1
f
+
g
+
h
+
i
X
N
t
−
1
+
f
+
h
f
+
g
+
h
+
i
W
E
e
•
+
g
+
i
f
+
g
+
h
+
i
P
T
e
•
−
j
f
+
g
+
h
+
i
Q
e
•
+
h
f
+
g
+
h
+
i
t
P
e
•
+
f
f
+
g
+
h
+
i
t
Y
e
•
−
h
f
+
g
+
h
+
i
t
I
e
•
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