I'd be interested if anyone knows how to adapt the calculation of Marginal return for marketing spend. I'm trying to work out an ideal cost per application for my online marketing spend. If I can develop a marginal returns graph based on previous spend I think I can find this 'ideal' level.
Its difficult. You may check your previous return from your spending and then compare it with present return. But then how do you calculate the impact on consumer. some returns may be intangible.I doubt there is any statistical tool available to calculate marginal return from advertising.