The most notable among these are the following. First, when regulations differ between large and small firms, scores are normally based on regulations prevailing for large firms (with the partial exception of the definition of collective dismissal, where the lowest threshold is taken into account), including in countries with a large share of small firms and significant differences in dismissal restrictions by firm size (such as Australia, Italy, Portugal and Turkey). The rationale behind this choice is that firm size is endogenous to regulations.