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In Fisher's paper, he did not include the error term.

http://psychclassics.yorku.ca/Fisher/Methods/chap5.htm

But Durbin & Watson suggested the error term, and also made the matrix form of the modern version of regression.

http://scholar.google.com.hk/scholar_url?url=http://ies.fsv.cuni.cz/default/file/download/id/26916&hl=zh-TW&sa=X&scisig=AAGBfm3WtUN0lM-Oyh-uzYyDSLBt0_G54g&nossl=1&oi=scholarr&ved=0CCAQgAMoADAAahUKEwid8bqOio3HAhVDI5QKHfx5CNw

Finally, I found this sentence in Fisher's paper:

"If errors occur in the heights, this will not influence the regression of height on age, provided that at all ages positive and negative errors are equally frequent, so that they balance in the averages. "

This means Fisher included the error term implicitly and take the average of the equation. So, the error term on average is zero in his paper. Durbin & Watson suggested the error term explicitly.

user2986288
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  • So, what is your question? Are you asking what is still missing from Durbin & Watson's form? – HDE 226868 Aug 25 '15 at 19:25
  • @HDE 226868♦, I want to ask why is the modern version of regression sometimes named as “Fisher's regression”? Fisher's version is not the same as what we use today. – user2986288 Aug 26 '15 at 03:32

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