Showing 1 - 10 of 4,501
Persistent link: https://www.econbiz.de/10011570757
Since its introduction to a wondering public in 1972, the Cox proportional hazards regression model has become an overwhelmingly popular tool in the analysis of censored survival data. However, some features of the Cox model may cause problems for the analyst or an interpreter of the data. They...
Persistent link: https://www.econbiz.de/10009442279
Categorical and limited dependent variable models are routinely estimated via maximum likelihood. It is well-known that the ML estimates of the parameters are inconsistent if the distribution or the skedastic component is misspecified. When conditional moment tests were first developed by Newey...
Persistent link: https://www.econbiz.de/10009442280
The area under the receiver operating characteristic (ROC) curve is often used to summarize and compare the discriminatory accuracy of a diagnostic test or modality, and to evaluate the predictive power of statistical models for binary outcomes. Parametric maximum likelihood methods for fitting...
Persistent link: https://www.econbiz.de/10009442283
Es wird das Konzept für ein makroökonomisches Strukturmodell mit integriertem Innovationsprozesskern zur Analyse und Projektion der Wirtschaftsentwicklung in Deutschland vorgestellt. Das geplante Modell soll explizit die Auswirkungen des immer bedeutsamer werdenden IuK-technologischen...
Persistent link: https://www.econbiz.de/10009442389
When there is uncertainty concerning the appropriate statistical model to use in representing the data sampling process and corresponding estimators, we consider a basis for optimally combining estimation problems. In the context of the multivariate linear statistical model, we consider a...
Persistent link: https://www.econbiz.de/10009442593
This paper introduces a new class of estimators based on minimization of the Cressie-Read (CR) power divergence measure for binary choice models, where neither a parameterized distribution nor a parameterization of the mean is specified explicitly in the statistical model. By incorporating...
Persistent link: https://www.econbiz.de/10009442597
The present paper demonstrates that treating multidestination trips (MDT) as single‐destination trips does not involve any systematic upward or downward bias in consumer surplus (CS) estimates because the direct negative effect of a price increase (treating MDT as a single‐destination trip)...
Persistent link: https://www.econbiz.de/10009442606
The architecture of the firm involves determination of a boundary that encompasses the functions managed by thefirm. The past decade has seen substantial reorganization of firms where vertical or horizontal integration has beenunbundled into weaker forms of collaborations including value chains...
Persistent link: https://www.econbiz.de/10009442664
The interconnections of agriculture and energy markets have increased through the rise in the new biofuel agribusinesses and the oil–ethanol–corn linkages. The question is whether these linkages have a causal structure by which oil prices affect commodity prices and through these links,...
Persistent link: https://www.econbiz.de/10009442693