By Eric Protzer
There is a popular concept in Wyoming known as the “boomerang” effect, which posits that people leave the state at high rates but often return later in life. This phenomenon is purported to support the long-term economic vitality of the state, as young people acquire experience elsewhere then move back to Wyoming with the skills they have acquired.
In reality, the Wyoming boomerang is a myth. Some individuals may move back to the state as they get older, but not in sufficient amounts to have a meaningful economic impact. Figure 1 shows the share of people born in each US state who are living in another state (as opposed to remaining in their home state) by age, with Wyoming highlighted in blue. If there was a strong boomerang effect, one would expect that the share of people living outside Wyoming would come down after a certain age. If anything, the opposite is true: older Wyoming-born people live outside the state at increasingly high rates.
Figure 1. Share Born in Each US State Living in Another US State by Age, 2022
Source: 2022 5-Year American Community Survey
Another way of looking at the data is to follow different individual birth cohorts as they age, rather than a snapshot of all people in one year. Figure 2 follows people born in Wyoming in the 50s through 80s in the 1960, 1970, 1980, 1990, 2000, 2010, and 2019 US Censes as they age[1]. These birth cohorts are selected to ensure we observe people who have at least reached their 30s, so as to provide some meaningful time window for return migration in mature adulthood. Nevertheless, there is no significant boomerang effect in any of the four observed birth cohorts. All left at high rates in their youth, and did not return to Wyoming in substantial numbers thereafter.
Figure 2. Share Born in Wyoming Living in Another State by Birth Cohort over Time
Sources: US Censes and American Community Surveys, Years 1960, 1970, 1980, 1990, 2000, 2010, and 2019
On the whole, it is thus not accurate to say that there is any kind of substantial boomerang effect. People born in Wyoming instead leave the states at high rates into young adulthood, and on average do not return thereafter.
One consequence of Wyoming’s enormous exodus of young adults who do not return is that the majority of the state’s population was born elsewhere. Figure 3 shows a treemap of the birth locations of people living in Wyoming. Those born in Wyoming account for just 42.6% of the Wyoming population. The next two top contributors to Wyoming’s population are Colorado and California.
Figure 3. Treemap of Birth Locations of the Population of Wyoming
Source: 2022 5-Year American Community Survey
[1] We avoid the 2020 census because of the effects of the COVID-19 pandemic, which could both induce irregular temporary migration patterns and statistical problems with the census sampling procedure itself. We instead use the 2019 census given that it is only one year beforehand.
