Sampling poses an interesting problem in markets with experience goods. Free samples reveal product quality and help consumers to make informed purchase decisions (promotional effect). However, sampling may also induce consumers to substitute purchases with free consumption (displacement...

Making video clips of a song unavailable on YouTube has no effect on its sales on iTunes; but album sales suffer when video clips of a song from it are made unavailable on YouTube. These findings of a study by Tobias Kretschmer and Christian Peukert suggest that we need not worry too much about...