The Effect of Primary Care Visits on Health Care Utilization: It doesn't control expenses in the medium and long run

The Effect of Primary Care Visits on Health Care Utilization: Findings from a Randomized Controlled Trial. Cathy J. Bradley, David Neumark, and Lauryn Saxe Walker. Cato Research Briefs in Economic Policy No. 104, March 14 2018, https://www.cato.org/publications/research-briefs-economic-policy/effect-primary-care-visits-health-care-utilization

[C]ash incentives, which can be manipulated by policymakers, encourage the desired behavior of primary care provider (PCP) utilization, but they may also have unintended consequences for other types of health care utilization. Total spending increases during the initial six-month incentive period, but the increase generally is not statistically significant among most incentives groups during the second six-month period…

We conclude that although an initial PCP visit can be effectively incentivized, and although observation of subsequent visits suggests that a PCP relationship has been established, overall health care utilization may not be reduced and may even increase in the short run.