Comment Comment by andreilys And for these reasons hard if not impossible to measure or control for confounders - but that doesn't mean it doesn't work!!One of the ways that advertisers and marketing people stay employed is they say that the output of their effort and money spent is not quantifiable. parent andreilys 5 years ago
One of the ways that advertisers and marketing people stay employed is they say that the output of their effort and money spent is not quantifiable.