Push and pull factors in migration according to Everett S. Lee (1917-2007) are categories that demographers use to analyze human migration from former areas to new host locations. Lee's model divides factors causing migrations into two groups of factors: push and pull. Push factors are things that are unfavourable about the home area that one lives in, and pull factors are things that attract one to another host area.[1][2]
^Guido Dorigo, and Waldo Tobler, "Push-pull migration laws." Annals of the Association of American Geographers 73.1 (1983): 1-17 online
Further reading
Azunre, Gideon Abagna, Richard Azerigyik, and Pearl Puwurayire. "Deciphering the drivers of informal urbanization by Ghana's urban poor through the lens of the push-pull theory." InPlaning Forum Vol. 18. (2021). online
Dorigo, Guido, and Waldo Tobler. "Push-pull migration laws." Annals of the Association of American Geographers 73.1 (1983): 1-17 online
Hoffmann, Ellen M., et al. "Is the push-pull paradigm useful to explain rural-urban migration? A case study in Uttarakhand, India." PloS one 14.4 (2019): e0214511. online
Khalid, Bilal, and Mariusz Urbański. "Approaches to understanding migration: a mult-country analysis of the push and pull migration trend." Economics & Sociology 14.4 (2021): 242–267. DOI:10.14254/2071-789X.2021/14-4/14