“…Given that the DEA method and Färe-Primont index were described in details in many publications, including among others the papers by : Coelli, Rao, and Battese, 1998;Färe, Grosskopf, and Lovell, 1994;Banker, Charnes, andCooper, 1984, as well as Charnes, Cooper andRhodes, 1978, their description was omitted due to the large volume of this paper. The DEA method was described in the Polish literature by among others: Rogowski, 1998;Rusielik, 2000;Zawalińska, 2004;Guzik, 2009;Góral, 2014., while the elaborations on the Färe-Primont index can be found in the studies by, among others, O 'Donnell, 2008'Donnell, -2011Rahman and Salim, 2013;Baležentis, 2015;Dakpo, Desjeux, and Latruffe, 2018;Dakpo et al, 2018a;Dakpo et al, 2019;Cilleroa and Thorneb, 2019and Rusielik, 2015. The research uses the Färe-Primont total factor productivity index, since, when compared with the other TFP indices, it is completely multiplicable, transitive, and allows for multilateral (with the other companies) and multi-temporal (in time) comparisons (O'Donnell, 2011;Dapko et al, 2019;Rusielik, 2015Rusielik, , 2020.…”