| 研究実績の概要 |
I build a model in which two artists that are heterogeneous in their degree of ex-ante popularity decide where to host their tracks, at a for-profit platform or at an open platform, to compare the outcomes with copyright and piracy:
1) Piracy equalizes the bargaining power of the famous and the unknown artists.
2) High-quality markets can appear because of piracy.
3) Piracy does not necessarily imply a price decrease.
4) Total welfare may decrease with piracy, but only if the unknown artist hosts her tracks at the for-profit platform with copyright. In this case, diffusion gains and inclusion of new customers due to piracy increase the total welfare, but the switching effect driven by the consumers who exchange high-quality copies by low-quality ones decreases the total welfare.
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