... “Market Structure and Macro Fluctuations,” Brookings Papers on Economic Activity, 2:285-322. 24III. Methodology and Empirical Specification IIIa. Structure-Conduct-Performance Framework The ... in the 17 Two segments in the paper sector, fine writing papers and tissue, are consumer oriented products and more heterogeneous than other paper and paperboard segments. 18 There are ... that pulp and paper is a commoditized industry, suggesting that the pulp, paper, and paperboard segments approximate a homogeneous product.17 The S-P model to be tested in this paper is (6)...