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lognormal population. The four statistical methods were: (i) the geometric mean (GM), (ii) a bias-corrected form of the …
Persistent link: https://www.econbiz.de/10009429560
a simple class of latent variable models, the structural measurement error models, to first tackle the problem. We … structural measurement error models analytically to gain insight into the sensitivity of inference to latent-model assumptions …
Persistent link: https://www.econbiz.de/10009431306
2SPS and 2SRI for logistic binary outcomes have not been thoroughly studied. We study the bias and variance properties … trial. We first present closed form expressions of asymptotic bias for the causal odds ratio from both 2SPS and 2SRI … approaches. Our closed form bias results show that the 2SPS logistic regression generates asymptotically biased estimates of this …
Persistent link: https://www.econbiz.de/10009439053
Two-stage sampling usually leads to higher variances for estimators of means and regression coefficients, because of intra-cluster homogeneity. One way of allowing for clustering in fitting a linear regression model is to use a linear mixed model with two levels. If the estimated intra-cluster...
Persistent link: https://www.econbiz.de/10009457371
It is well-known that bias such as lead-time and length distort studies of screening efficacy whether survival or … incidence is of interest. A third bias, usually called overdiagnosis bias, occurs when an individual is only diagnosed with … disease before death from a different cause because he/she is screened. These forms of bias can also arise in observational …
Persistent link: https://www.econbiz.de/10009462767
bias preventive approach developed by Firth (1993) to handlethe bias of an estimator of the log-odds ratio parameter in … conditional logistic regression bysolving a modified score equation. The resultant estimator not only reduces bias but alsocan …
Persistent link: https://www.econbiz.de/10009464883
A recursive test procedure is suggested that provides a mechanism for testing explosive behavior, date stamping the origination and collapse of economic exuberance, and providing valid confidence intervals for explosive growth rates. The method involves the recursive implementation of a...
Persistent link: https://www.econbiz.de/10009483168
alternatives can seriously bias the evaluation of consequences in risky high-stakes decisions. …
Persistent link: https://www.econbiz.de/10009441242
alternatives can seriously bias the evaluation of consequences in risky high-stakes decisions. …
Persistent link: https://www.econbiz.de/10009441300
Over the past 30 years, a widely accepted model of "open-access" fisheries has been developed, yet empirical tests of the standard model have been relatively few. One difficulty is that fish stocks, the levels of which affect the rate of catch, are not directly observable. Simplifying...
Persistent link: https://www.econbiz.de/10009444643