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Sex Ratio

  • By: Dudley L. Poston, Heather Terrell Kincannon & Bethany S. DeSalvo
  • In: Encyclopedia of Human Relationships
  • Edited by: Harry T. Reis & Susan Sprecher
  • Subject:Interpersonal Relationships, Group Processes/Dynamics, Close Relationships

The sex ratio (SR) is the most popular index of sex composition used in demographic and other scholarly analyses; it is defined as the number of males per 100 females:

An SR above 100 indicates an excess of males, and an SR below 100 ...

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