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.
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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.
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.
Highlights how retirement-income projections affect employee contributions to savings account.
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.
Studies the impact of teacher pay-for-performance reforms adopted with complementary human resource management practices on student achievement and workforce flows.