Fixed fee licensing for cost-reducing technologies: Should innovators reveal their private information?

In the process of licensing their technology to downstream firms, innovators often get some information on the firms' cost reductions. Revealing this information to the market influences the market game, and thereby the licensees' willingness to pay. We analyze the innovator's optimal information provision with fixed fee licensing. Our main result is that the innovator should reveal the number of licenses, but should keep silent on the cost reductions of licensees. The intuition is that the innovator's profit depends only on the willingness to pay of the critical firm which only just buys a license, and this firm benefits if the number of firms is revealed, but nothing is learned on the actual cost distribution.