Mexican migration to the United States:  defacto rules.
"Migration from Mexico to the United States is viewed very differently by those two nations.  The United States perspective is that of illegal immigrants invading their nation, especially during times of national unemployment.  From the Mexican perspective, people migrate across the border in response to quite predictable labor supply and demand pressures.  The fact that for many years the United States held undocumented labor to be punishable for the worker but not for the employer suggests a tacit recognition of the labor supply/demand factor, but a recognition tainted by discrimination."
Bustamante
J A
JA
D000569:Americas; D001290:Attitude; D001519:Behavior; D002489:Central America; D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D004467:Economics; D004641:Emigration and Immigration; D006280:Health Workforce; D007843:Latin America; D008800:Mexico; D009656:North America; D011153:Population; D011157:Population Dynamics; D011287:Prejudice; D011584:Psychology; D011640:Public Policy; D012106:Research; D012940:Social Problems; D014171:Transients and Migrants; D014481:United States
Americas; Attitude; Behavior; Central America; Comparative Studies; Demographic Factors; Developed Countries; Developing Countries; Economic Factors; Human Resources; Illegal Migrants; International Migration; Labor Migration; Latin America; Manpower Needs; Mexico; Migrants; Migration; Migration Policy; North America; Northern America; Policy; Population; Population Dynamics; Population Policy; Psychological Factors; Research Methodology; Social Discrimination; Social Policy; Social Problems; Studies; United States