top of page



Improvement requires evaluation of programs & initiatives. We utilize rigorous methods to evaluate programs and their impact on clinical, quality, and cost outcomes.


VSSL members have led large-scale evaluations of quality- and value-based payment and delivery programs, and their impact on patients. Examples of this work:

Program: Bundled payments (prominent payment model for improving the value of care)

Examples: Over the last 5 years, VSSL Director Dr. Joshua Liao and colleagues have been at the forefront of using advanced statistical methods to evaluate the impact of nationwide bundled payment programs.

As a part of this portfolio of work, Dr. Liao and colleagues recently used advanced econometric methods to evaluate the long-term association between hospital participation in joint replacement bundles and quality,  and cost outcomes. Main findings included:


* 1.6% differential decrease in average episode spending

* These savings were driven by early, not late, participants

* No differential changes in quality outcomes

In a separate study, Dr. Liao and colleagues evaluated how hospital co-participation in (i.e., simultaneous participation in both) joint replacement bundles and accountable care organizations impacted outcomes. They found that compared to hospitals bundling joint replacement only, those co-participating in joint bundles and accountable care organizations had differential changes in 90-day unplanned readmissions and post-discharge care utilization patterns. 

From Liao JM, et al. Association of Bundled Payments for Joint Replacement Surgery and Patient Outcomes With Simultaneous Hospital Participation in Accountable Care Organizations. JAMA Network Open. 2019. 

Program: (coming soon)

Examples: (coming soon)

bottom of page