Starting with (8) we have

Partial integration of the left-hand side yields

because the derivative of v(t) is
as is seen from (2). (The economic interpretation of
is naturally that the change in
capital stock (= book value) is cash outflows less depreciation.)
By substituting (5) into the right-hand side of (I1), we have

Equating (I2) and (I3) gives (9).
The next section (Appendix II)
The previous section (4 An Application of Kay's Method on a
Finnish Business Firm, and Directions for Further Research)
The contents section of Salmi and Luoma (1981)
Other scientific publications by Timo Salmi in WWW format