What is the fine-grained topic of the following text: I am using the 1% random selection from the 1880, 1900, and 1920 censuses to look at how many of the Norwegian immigrant women in Chicago from those selections were married, employed in certain types of jobs, etc. Only return the topic.
Analysis of Norwegian immigrant women's marital status and employment in Chicago based on 1880, 1900, and 1920 censuses data.