mean annual increment (MAI)
time that maximizes average volume of the stand
max V(t)/t
optimal aging problem
How long do I let something stand, how do I make this decision
how to make decision in optimal aging problem
compare present net returns to net returns of waiting one more year
(p-c)V(T_0) = (p-c)V(T_1)/(1+r)
Wicksell Rule
follows same intuition of hotelling rule