We provide a shorter proof of the main result in Reny and Perry (2006, Econometrica) by establishing a lower semicontinuity property of auctions as the number of traders goes to infinity, leveraging existence of equilibria in the limit auction. Our proof also eliminates two of the assumptions in...

We analyze industrial espionage in a model of two firms: a monopoly incumbent, M, and a potential entrant, E, who owns a noisy intelligence system (IS) of a certain precision a . The IS generates a signal on M’s action and E decides whether or not to enter based on this signal. We show that if...