“…Ayuso-i-Casals et al, (2009) report that from 1990 to 2005 an increase in the share of government finances covered by numerical fiscal rules led to lower deficits in the EU countries. A number of studies provide arguments to prove that the introduction of fiscal rules contributes to improved fiscal outcomes, for example: they can contribute to a successful fiscal consolidation (Guichard et al, 2007), deficit or debt rules lead to limiting the budget deficit (Debrun et al, 2008) and to a lower cost of debt servicing (Thornton and Vasilakis, 2018); expenditure rules are conducive to a lower primary expenditure (Deroose, Moulin and Wierts, 2006), also by reducing pressure to increase expenditure in case of revenue windfall (Wierts, 2008). In addition, one can find confirmation that their impact is greater if they are based on strong legal foundations, and compliance with them is strictly enforced (Hallerberg, Strauch and von Hagen, 2007).…”