Estimation of the Cyclical Behaviour of Mark-Ups: A Technical Note
Joaquim Oliveira Martins, Stefano Scarpetta
OECD Economic Studies, vol. 0, 2002, p. 173-188.

Mark-Up Pricing, Market Structure and the Business Cycle
Joaquim Oliveira Martins, Stefano Scarpetta, Dirk Pilat
OECD Economic Studies, vol. 0, 1996, p. 71-105.