How did economic pressure affect internal migration during World Wars I and II? Most people could not afford to move during those years, so home buying and moving was mostly stagnant.
Wartime production needs created job opportunities, so many people moved to seek work in that industry.
The need for workers in arms supply factories led to an easing of government restrictions on credit for home buying.
People began to move into multi-generational households because so many of the primary earners went off to fight in war.