2 thoughts on “A Derivation of Piketty's Second Fundamental Law of Capitalism

  1. Does it not follow immediately from your formula7?
    βi+1 =βi (1 + si/βi)/(1 + gi)
    So, βi+1 /βi=(1 + si/βi)/(1 + gi).
    In the limit
    1=(1 + s/β)/(1 + g).
    So,s/β=g and β=s/g

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