The u. s. census bureau estimates that 40 percent of u. s. women born in the 1980s will never be married with children. identify the factors that support this prediction.

Increased level of education and focus on careers--as women have the ability to have relationships but also provide for themselves, marriage is not a necessary option. 

Birth control and access to college education has allowed women to focus on careers instead of family. They are able to still have successful lives but not have to worry about balancing a career and a family. 

The answer would be political systems .

The best sociological research method would have to be using experiments although it has some disadvantages as well