O'Donoghue, Ted; Scotchmer, Suzanne; Thisse, … - 2012
In active investment climates where firms sequentially improve each other's products, a patent can terminate either … until one of these happens as the effective patent life, and show how it depends on patent breadth. We distinguish "lagging … two types of patent policy with leading breadth: (i) patents are finite but very broad, so that the effective life of a …