This paper examines the methodology to investigate differences in productivity between exporters and non-exporters. After that, calculation methods` pros and cons, used in this study, are presented. Analysing the relationship between export status and productivity growth, Latvian manufacturing companies’ data for the period 2000-2009 are used as an example. We expect that companies export activities are decent for labor productivity growth. The main hypothesis point is concerned about more productive firms involved into export markets. In the present research, using company-level data from Latvian manufacturing industry, we attempt to provide a new information into the modern research on export-productivity correlation in the Latvian manufacturing industry. In the post-recession period Latvian government policy have shown solid interest in the export-led growth through various export promotions policies. In the empirical investigation data from local production branch, from cross sectional data collected in regular surveys by the Central Statistical Bureau are used.