You were right: Frisch did use the term "macrodynamic". And Geoff Hodgson was 
correct after all. BTW, the OED has the following entries:

macroeconomic, a. [DRAFT REVISION Mar. 2001]  
Of or relating to macroeconomics. 

1939 H. W. ROBINSON Econ. of Building vi. 93 All our statistics..are obtainable 
only for large areas like England and Wales, Great Britain or the United 
Kingdom... Our approach is therefore macro-economic. 1940 Jrnl. Amer. Statist. 
Assoc. 35 438 The fundamental disadvantage [of the book]..lies in the approach, 
i.e., what Mr. Robinson calls "macro-economic". 1948 Econometrica 16 309 
(heading) Some conditions of macroeconomic stability. 1957 Economist 5 Oct. 
36/3 The macroeconomic prophets, having seen their forecasts repeatedly 
falsified, have lost something of their confidence. 1991 Financial Times 20 
Mar. 24/1 The central objective of the government's macroeconomic policy 
continues to be the defeat of inflation.

AND
macrodynamic, a. [DRAFT ENTRY Mar. 2000]  
Econ.
    Concerning processes of change occurring in an economic system as a whole. 

1933 R. FRISCH Econ. Essays in Honour Gustav Cassel 172 The macro-dynamic 
analysis..tries to give an account of the fluctuations of the whole economic 
system taken in its entirety. 1972 K. K. KURIHARA Essays in Macrodynamic Econ. 
iii. 45 The nature and direction of theoretical advance in the field of 
macrodynamic economics. 1992 R. M. GOODWIN & P. M. PACINI in A. Vercelli & N. 
Dimitri Macroecon. ix. 255 Models offering a deterministic explanation of the 
erratic behaviour of economic aggregates are classified according to two more 
general approaches to macroeconomics: the macrodynamic approach and the 
intertemporal maximization approach.

Nicholas J. Theocarakis