It will be more useful to study agenda setting on mobile roaming rate control by using both of qualitative and quantitative methods. In addition, budget constraints and other factor on political windows should be more extend, for example, political system, electoral politics. Because this study is based on value or normative judgement, it will be of benefit to differentiated objective and subjective conditions as stated on value conflict theory (Clemons &Mcbeth, 2001, p.5). Ultimately, comparing between policy window model on agenda setting with other agenda setting theories should do in the future.