This paper develops an econometric model of industry dynamics for concentrated markets that can be estimated very quickly from market-level panel data on the number of producers and consumers using a nested fixed-point algorithm. We show that the model has an essentially unique symmetric...

"This paper evaluates to what extent the introduction of firing costs can affect the aggregate dynamics of a neoclassical growth model with hetrogeneous establishments. Similarly to the previous literature, firing costs are found to have large steady- state effcts. However, they have no...