The Econometric SocietyEconometrica: Apr 1935, Volume 3, Issue 2
The Characteristic Solutions of a Mixed Difference and Differential Equation Occuring in Economic Dynamics
https://doi.org/0012-9682(193504)3:2<225:TCSOAM>2.0.CO;2-T
p.
225-239
Harold Holme, Ragnar Frisch
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