The United Arab Emirates and most of the Middle-East nations have a huge population of migrant workers from neighbouring countries, for they are islands of rich economies in the region. Hence, they attract low-skilled workers from other countries, who move in for higher wages without bringing their family. Most of the countries in the region are patrilineal, and hence the male members lead the household and women are not encouraged to work. Thus, these countries have a higher sex ratio. For example, Qatar has a sex ratio of 311 males per 100 females (3.11:1.00, or three times as many males as females).