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requiring instruments. In this article, we formulate the regressor endogeneity problem using a novel conditional copula … assumption of Gaussian copula regressor-error dependence structure and eliminates unnecessary modeling of regressors. Under the … model, we develop an instrument-free two-stage nonparametric copula endogeneity control function approach (2sCOPE-np), which …
Persistent link: https://www.econbiz.de/10015361483
This paper presents a new multivariate copula-based modeling approach for analyzing cost-offsets between drug and …
Persistent link: https://www.econbiz.de/10012463458
-free methods using copulas to address the endogeneity problem. The existing copula correction method focuses only on the endogenous … distributed endogenous regressors cause model non-identification or finite-sample poor performance. Our proposed two-stage copula …
Persistent link: https://www.econbiz.de/10012814483
Regression discontinuity designs (RDDs) are a popular method to estimate treatment effects. However, RDDs may fail to yield consistent estimates if the forcing variable can be manipulated by the agent. In this paper, we examine one interesting set of economic models with such a feature....
Persistent link: https://www.econbiz.de/10012461014
Under the assumption of no unmeasured confounders, a large literature exists on methods that can be used to estimating average treatment effects (ATE) from observational data and that spans regression models, propensity score adjustments using stratification, weighting or regression and even the...
Persistent link: https://www.econbiz.de/10012464559
This paper addresses estimation of an outcome characterized by mass at zero, significant skewness, and heteroscedasticity. Unlike other approaches suggested recently that require retransformations or arbitrary assumptions about error distributions, our estimation strategy uses sequences of...
Persistent link: https://www.econbiz.de/10012470794
As part of the process of enacting the Medicare Catastrophic Coverage Act (MCCA) in 1988, both the Congressional Budget Office (CBO) and the Department of Health and Human Services (HHS) estimated the cost of the pharmaceutical part of the proposal which varied substantially. For some benefit...
Persistent link: https://www.econbiz.de/10012472526
Health expenditure data almost always include extreme values. Such heavy tails can be a threat to the commonly adopted least squares methods. To accommodate extreme values, we propose the use of an estimation method that recovers the often ignored right tail of health expenditure distributions....
Persistent link: https://www.econbiz.de/10014322831
Several countries rely on regulated health plan competition to combine affordability of health plans with incentives for cost containment and quality improvement. Typically, these policies include premium regulation supplemented with risk equalization to compensate health plans for predictable...
Persistent link: https://www.econbiz.de/10012457099
It is common in regression discontinuity analysis to control for high order (third, fourth, or higher) polynomials of the forcing variable. We argue that estimators for causal effects based on such methods can be misleading, and we recommend researchers do not use them, and instead use...
Persistent link: https://www.econbiz.de/10012458261