>suppose we have a function Q = K^a*L*^(1-a). Is it possible for K and
>L to be measured in different units? different units from Q? (if, for
>example, K is measured in "leets" and L is measured in hours, what are
>the units of Q?)

Sure.  The function maps values from the K and L dimensions, measured in 
their respective units whatever they happen to be, into values in the Q 
dimension, measured in its units, whatever they happen to be.  Let's say Q 
is measured in tons of steel.  Divide both sides of the function by L (for 
example), and the dependent variable is then measured in tons of steel per 
unit of labor input.  The dimensions have to be mutually consistent across 
the variables in an equation only if the equation is expressing a 
relationship within a given dimension, e.g. Q = (Q/L)*L.  To take another 
example, if I say that global mean temperature is a function of tons of 
fossil fuel consumption and acres of forest, nothing compels me to 
understand global mean temperature in some composite of fuel tons and 
forest acres.

Fwiw,
Gil






>--
>Jim Devine / If you're going to support the lesser of two evils, you
>should at least know the nature of that evil.
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