Related Experiment Video
Updated: Jun 4, 2026

Measuring and Altering Mating Drive in Male Drosophila melanogaster
Published on: February 15, 2017
On measuring the marriage squeeze
1United States Bureau of the Census, USA.
Abstract:
During the 1960's, single men have been marrying at an increasing rate, and single women at a decreasing rate. These trends can be explained almost entirely by disproportions between the sexes at the prime ages of marriage-that is, by what is commonly called the "marriage squeeze." The disproportions arose from the increase in births during the period 1939-47, coupled with the fact that women marry earlier than men.These changes in marriage patterns must certainly have some effect on the birth rate and on household formation, although perhaps a secondary one. The consequences of these changes are a project for further inquiry.
Related Concept Videos
System of Forces and Couples
The principle of transmissibility plays a crucial role in this process. According to...
Close Relationships and Culture
Measurements of Strain
Moment of a Couple: Problem Solving
The moment of a couple is found by multiplying the magnitude of one of the forces by the perpendicular distance between the line of action of the two forces. This creates a twisting force, which can be used to rotate an object. The moment of a couple is used to solve problems involving balanced...
Equivalent Couples
Two couples are considered to be equivalent if they produce the same rotational effect on a rigid body. In other words, the two couples have the same magnitude and act in the same direction, causing the same angular displacement or acceleration in the body.
For instance, consider two couples lying in the plane of the page, with one having a pair of equal...
Applications of Life Tables

