历史 Separations and distinct national development. (历史造成的疏离和各自发展的轨道) Political Divergences and concerns about democratic values. (政治体制的差异和对民主价值的珍视) Economic Competition and perceived threats to local industries. (经济上的竞争以及对本土产业的担忧) Cultural and Identity Differences and the desire to preserve distinctiveness. (文化和社会认同的差异以及保持自身特色的愿望) Information Asymmetries and media portrayals. (信息不对称和媒体的呈现方式)