Large efficiency gains and substantial reduction in omitted variable bias are demonstrated in an application to sociodemographic differences in the risk of child obesity estimated from two nationally representative cohort surveys.
This research challenges the assumption that the timing of deployments and their distribution over time are serially independent, arguing that military interventions occur in temporal clusters driven by the number of interventions in the recent past.
This report challenges the assumption that the timing of deployments and their distribution over time are serially independent, arguing that military interventions occur in temporal clusters driven by the number of interventions in the recent past.
There is a bias-variance tradeoff at work in propensity score estimation; every step toward better balance usually means an increase in variance and at some point a marginal decrease in bias may not be worth the associated increase in variance.
Estimation of six-month prognosis is essential in hospice referral decisions, but accurate, evidence-based tools to assist in this task are lacking. PROMPT, a new prognostic model incorporating health-related quality of life, demonstrates promising performance and potential value for hospice referral decisions.
Ownership of risky assets rises as the risk of medical expenditure decreases. Medigap or employer supplemental insurance increases risky asset holding by about 7 percentage points. Belonging to a Medicare HMO increases risky asset holding by 13 percentage points.
Examines implications for statistical power of using predicted probabilities for a dichotomous variable rather than the actual variable. Information loss from not observing actual values can be large. Direct substitution is easy and efficient.
Examines financial implications of the Centers for Medicare & Medicaid Services Hierarchical Condition Categories risk-adjustment model on Medicare payments for individuals with comorbid chronic conditions. Some payments were underpredicted.