This paper by Trygve Haavelmo was never submitted to a journal. The
paper has been transcribed from Haavelmo's handwritten notes for a
seminar given in 1942. The notes were kept by Haavelmo and were not known
to exist by anyone else until Haavelmo died in 1999 and left his
scientific remains to the Department of Economics, University of Oslo. The
paper was retrieved from these personal archives by Olav Bjerkholt, who
transcribed it from the original handwritten manuscript and submitted it
to Econometric Theory.