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M. B. Pietrzak and A. P. Balcerzak, A Spatial SAR Model in Evaluating Influence of Entrepreneurship and Investments on Unemployment in Poland, Proceedings of the International Scientific Conference Quantitative Methods in Economics Multiple Criteria Decision Making XVIII. Vratna: Letra Interactive, pp.303-308, 2016.

M. B. Pietrzak and A. P. Balcerzak, Quality of Human Capital and Total Factor Productivity in New EU Member States, 2016.

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M. Barnard and P. , PhD is a lecturer in the Department of Statisics and Econometrics at Nicolaus Copernicus University. He is a secretary of Polish Statistical Society Branch in Toru?