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And the arrival of Tinder changed dating even further. These social networks turn out to have a peculiar property. The question that Ortega and Hergovich investigate is how this changes the racial diversity of society. But it is consistent with the hypothesis that it does.

These changes are set to continue, and to benefit society as result. Loose ties have traditionally played a key role in meeting partners. One is that the trend is the result of a reduction in the percentage of Americans who are white.

Another obvious kind of network links nodes at random. If marriages were random, this should increase the number of interracial marriages, but not by the observed amount. But if the researchers add random links between people from different ethnic groups, the level of interracial marriage changes dramatically.

Of course, there are other factors that could contribute to the increase in interracial marriage. And there is another surprising effect. But real social networks are not like either of these. Next, the researchers compare the results of their models to the observed rates of interracial marriage in the U. Instead, are rudy and valerie dating people are strongly connected to a relatively small group of neighbors and loosely connected to much more distant people.

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For homosexual couples, it is far and away the most popular. And when people meet in this way, it sets up social links that were previously nonexistent.

One obvious type of network links each node with its nearest neighbors, in a pattern like a chess board or chicken wire. But now the first evidence is emerging that their effect is much more profound. These loose connections turn out to be extremely important. Their network consists of men and women from different races who are randomly distributed. The researchers start by simulating what happens when extra links are introduced into a social network.