“…For gaining information on whether the debt servicing costs are not excessive it is necessary to determine the threshold of this indicator. In the literature it is taken at the level 20-50% [DeVaney, 1994;DeVaney, Lytton, 1995;Kempson, 2002;MORI, 2003;OXERA, 2004;Faruqui, 2006;Rebiere, 2007;Beer, Schürz, 2007;Carpentier, Van den Bosch, 2008;D'Alessio, Iezzi, 2012].…”