The level of uncertainty will depend on several factors: the nature of the functional form used in the multivariate analysis; the type of econometric technique employed; the appropriateness of the statistical assumptions embedded in the model or technique; the comprehensiveness of the variables included in the analysis; and the accuracy of the data that are utilized. [...] It also takes into account the effect of changes in capacity utilization using the production structure of Berndt and Fuss (1982) and Berndt and Hess (1986).2 2. Restructuring and productivity growth The two leading explanations for the slower productivity growth in the Canadian manufacturing sector during this period are both related to the short- and long-term restructuring that occurred in the [...] The two methods make use of same source data—the longitudinal file that is built from the Annual Survey of Manufactures (ASM).6 The differences between the two estimates reflect the impact of the different assumptions that the two methods use, and can be used to measure the impact of relaxing certain of these assumptions. [...] In the context of the estimation of the aggregate output growth and the sources of the growth, those key assumptions are as follows. [...] The aggregate MFP growth is decomposed into the effects of scale economies, the effect of variable utilization, the effect of MFP growth at individual plants, and the last two terms that capture the effects of the reallocation of capital and labour inputs on aggregate MFP growth.