The apparent going premium of 50 percent for a targeted ad on the Internet suggests that Internet advertising may be as likely to reduce total ad spending as to increase it.
Ad spending has a tendency to fluctuate over time.
mnli hypothesis: Ad spending has a tendency to fluctuate over time. premise: The apparent going premium of 50 percent for a targeted ad on the Internet suggests that Internet advertising may be as likely to reduce total ad spending as to increase it.