Residents of some Midwestern and Mountain states gained the most income per capita during the past four years, a Stateline analysis shows, as competition for workers drove up wages in relatively affordable places to live. With the COVID-19 pandemic now in the nation’s rearview mirror, Stateline’s analysis offers a more complete understanding of how some states’ residents benefitted economically — and others didn’t — as policy decisions and Americans’ choices shuffled state-by-state outcomes. The oil and gas industry boosted the per capita incomes for residents of North and South Dakota. Mounta...