title: An elusive concept: the changing definition of illegal immigrant in the practice of immigration control in the United Kingdom.
mesh_terms: D001290:Attitude; D001519:Behavior; D003710:Demography; D019049:Developed Countries; D004641:Emigration and Immigration; D005060:Europe; D006126:Group Processes; D011057:Politics; D011153:Population; D011157:Population Dynamics; D011584:Psychology; D011639:Public Opinion; D011640:Public Policy; D012919:Social Behavior; D014171:Transients and Migrants; D006113:United Kingdom
keywords: Attitude; Behavior; Demographic Factors; Developed Countries; Europe; Group Processes; Illegal Migrants; International Migration; Migrants; Migration; Migration Policy; Northern Europe; Policy; Political Factors; Population; Population Dynamics; Population Policy; Psychological Factors; Public Opinion; Social Behavior; Social Policy; United Kingdom