This is an invited chapter for the forthcoming Volume 4 of the Handbook of Industrial Organization. We present empirical models of demand and supply in differentiated products industries with an emphasis on the key ideas arising from the recent applied literature. We start with a discussion of...

We show standard methods to estimate production functions do not identify markups.This nonidentification creates spurious skewness in estimated markup distributions.We also show that ex-ante structure on the returns to scale solves the identificationproblem. In US public firm data and in a Monte...

In this paper, we examine price movements over time around the collapse of a bid-rigging conspiracy. While the mean decreased by sixteen percent, the standard deviation increased by over two hundred percent. We hypothesize that conspiracies in other industries would exhibit similar...