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The article presents the use of Cobb-Douglas production function (C-D model) to analyse the impact of two basic factors of production: capital and labour of its size in Polish steel industry. Paul Cobb and Charles Douglas wrote the function as: P = a Lα C1-α (where P is the production of L - labour, C - capital). In this century the function was popularized in the neoclassical model of the company. Currently, the C-D function is used to assess the scale of production in economy, industry and company. In the paper the function (changed by David Durand): P = a Lα Cβ was used. The problem of the research is the selection of variables to the model C-D for the steel industry in Poland (on the basis of data for the period 2000-2015). The author of the article decided to verify the classical approach to define changed parameters of the C-D function according to the situation in Polish steel industry. The use of C-D function to assess economic activity of steel industry in Poland, evaluated the effectiveness of the restructuring measures (after the transformation of the economic system in Poland) and answer the question about level of the market maturity by restructured steel industry in Poland.
Keywords: Crude steel production, Polish steel industry, Cobb-Douglas production function© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.