In fact, while in these countries the number of renewals of assignments is not constrained, legislation, collective agreements or court practices limit the number of renewals of fixed-term contracts between the agency and the worker. Insofar as open-ended contracts between the agency and the worker are not forbidden - and actually encouraged - in these countries, restrictions on contracts only are likely to induce fewer constraints on user firms’ practices and, therefore, are not considered in the indicators reported in Figure 2.8. By contrast, there are more frequent limitations on the cumulative duration of assignments, which are found in more than half of OECD countries.