I think you are on the right track that the author of the post has not equated productivity to an accepted definition. He seems to fail to take into account cap

I think you are on the right track that the author of the post has not equated productivity to an accepted definition. He seems to fail to take into account capital. The relevance of which probably best makes sense to the layman via looking at marginal rate of substitution: http://en.wikipedia.org/wiki/Production_theory_basics#The_marginal_rate_of_technical_substitution http://en.wikipedia.org/wiki/Production_theory_basics#The_ma...