How does implicit differentiation explain the move from (4) to (5)?

ruzbayhhi · Oct 29, 2013

I spent a lot of time trying to understand the move the author makes in this paper from (4) to (5). It seems like it is a straightforward application of implicit differentiation, but I just can't replicate that.

Relevant segment:
http://i.imgur.com/GqFUxpQ.jpg
Relevant paper:
http://www.jstor.org/discover/10.2307/2555613?uid=2&uid=4&sid=21102852414973

ruzbayhhi · Oct 29, 2013

aaaannnnd five minutes after posting this I managed to solve it...

How does implicit differentiation explain the move from (4) to (5)?

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How does implicit differentiation explain the move from (4) to (5)?

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