The effect of ambient threats to employment on low birthweight.

The hypothesis that ambient threats to employment security are associated with increased rates of low birthweight is tested in two sites. The first test uses interrupted time-series methods to measure the association between a threatened reduction in the number of state workers and the incidence of low birthweight in Sacramento, California. The second test is of the association between unexpectedly low employment and low birthweight in Los Angeles, California. Both tests suggest that White males without Spanish surnames and Spanish-surnamed males are at elevated risk of low birthweight when the community is faced with a perceived threat to employment security. The implications of the findings for economic regulation and the provision of services are discussed.