This paper analyzes the role of patent filing fees requested by the member states of the European Patent Convention (EPC). We provide a first empirical evidence showing that the fee elasticity of the demand for priority applications is negative and significant. Given the strong variation in...

We analyse the determinants of opposition to biotechnology and pharmaceutical patents granted by the European Patent Office between 1978–96. Opposition can be considered an early form of patent validity challenge suit. In our sample, 8.6% of the patents are attacked in opposition proceedings....