In fact, open-ended contracts between the agency and the worker are the dominant contractual form of TWA employment in at least eight European countries (Table 2.1). For all these reasons, TWA employment is often very valuable to workers in terms of the opportunities offered to them and the possibility to gain experience, thereby representing a stepping stone into stable, regular employment (Jahn and Rosholm, 2012, Von Simson, 2012). As shown in Figure 2.8, except in English-speaking common-law countries as well as Denmark, Hungary, Iceland, Israel, Switzerland and, among non-OECD economies, Latvia and the Russian Federation, all countries put some limitations to the use of TWA employment.39 Two clear patterns emerge from the comparison of Figures 2.7 and 2.8.