A study by Ohio State University showed that in the 1970-1980s, interracial marriages became quite common in the United States. However, the situation changed dramatically in the 1990s, when a noticeable decrease was observed in the number of marriages between people of different racial and ethnic groups. For example, in the 1980s, more than half of Asian men living in the United States entered into such marriages. In the 1990s, this figure dropped to 45%.
The reason for this lies primarily in the influx of new immigrants: for example, people from Asia, who previously found partners among native Americans, gained the opportunity to marry other Asians. The only exception is African Americans, who very actively married people of a different skin color.
Another correlation was noted: the higher the education level of a U.S. resident, the more likely they are to marry someone from a different ethnic or racial group. The only exception here is also black Americans.
Another study was conducted by economists at Harvard University. They concluded that the influx of unskilled migrants positively affects the country's economy. The essence of the theory is as follows: incoming low-skilled foreigners find jobs and free up highly skilled residents from engaging in such unskilled and low-paid labor. For example, they work as nannies, and mothers with higher education, freed from childcare, get the opportunity to work, benefiting the family budget and the economy as a whole.
The authors of the study concluded that a state that can ensure that low-skilled migrants make up 7% of the total workforce has a chance to increase its gross domestic product by 1.2%. For example, in Singapore, such migrants constitute the desired 7% of the total number of workers, in Hong Kong – 6.8%, and in the USA – 3%. As a result, in Singapore and Hong Kong, many more women aged 25-34 work than in the USA.