How can i compute the average geometric annual rate of growth of the country's total income ( GDP)?
Answer:
If GDP grows at a rate of r per year after n years the size will be new=old*(1+r)^n If you want to solve for r instead use the natural logarithm and get
ln(new/old)/n=ln(1+r) or exp{ln(new/old)/n}-1=r
OR
if you have r1 r2 .rn the
geometric mean={(1+r1)x(1+r2)..x(1+rn)} ^ (1/n) -1
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