Sojourner is a labor economist whose research focuses on three areas: (1) effects of labor-market institutions on economic productivity and in politics, (2) policies to promote efficient and equitable development of human capital with a focus on early childhood and K-12 education systems, and (3) behavioral economic approachers to consumer financial decisions.
Studies the impact of teacher pay-for-performance reforms adopted with complementary human resource management practices on student achievement and workforce flows.
Highlights how retirement-income projections affect employee contributions to savings account.
Studies the effects of nursing home unionization on numerous labor, establishment, and consumer outcomes using a regression discontinuity design. Finds negative effects of unionization on staffing levels and no decline in care quality, suggesting positive labor productivity effects.
Examines the widespread belief that voluntarily negotiated agreements produce better long-run relationships than do third-party imposed resolutions. such as arbitrator decisions or court judgments.
Finds that high-quality early childhood intervention has large positive effects on cognitive skills and achievement for children from low-income families, but a negligible effect for children from higher-income families. Either an income-targeted or universal intervention could close a large fraction of the existing achievement gap observed between these groups.