The ways in which migrant history is written depends on the people who are being researched. Historiography on Irish migrants is larger than on Asian American migrants. Reasons for this include the time in which the studies of these people
Anna Pegler-Gordon looks at how photography had been used to visualize race. Pegler-Gordon uses the early photography of Chinese immigrants to show this. The use of photography and medical examinations were two ways to restrict people from the United States.