Showing 1 - 10 of 9,896
heteroskedasticity of unknown form is introduced. …
Persistent link: https://www.econbiz.de/10011940607
heteroskedasticity of unknown form is introduced. …
Persistent link: https://www.econbiz.de/10010290410
heteroskedasticity of unknown form is introduced. …
Persistent link: https://www.econbiz.de/10005653239
A wide range of tests for heteroskedasticity have been proposed in the econometric and statistics literatures. Although … that seek to improve the reliability of common heteroskedasticity tests using Edgeworth, Bartlett, jackknife and bootstrap … conditional heteroskedasticity (ARCH-type models). We also suggest several extensions of the existing procedures (sup-type or …
Persistent link: https://www.econbiz.de/10005101027
We consider time series models in which the conditional mean of the response variable given the past depends on latent covariates. We assume that the covariates can be estimated consistently and use an iterative nonparametric kernel smoothing procedure for estimating the conditional mean...
Persistent link: https://www.econbiz.de/10011422182
This paper develops a specification test for the instrument validity conditions in the heterogeneous treatment effect model with a binary treatment and a discrete instrument. A necessary testable implication for the joint restriction of instrument exogeneity and instrument monotonicity is given...
Persistent link: https://www.econbiz.de/10010368206
We first propose procedures for estimating the rejection probabilities for bootstrap tests in Monte Carlo experiments without actually computing a bootstrap test for each replication. These procedures are only about twice as expensive as estimating rejection probabilities for asymptotic tersts....
Persistent link: https://www.econbiz.de/10011940622
This paper introduces bootstrap specification tests for diffusion processes. In the one-dimensional case, the proposed test is closest to the non parametric test introduced by Ait-Sahalia (1996), in the sense that both procedures determine whether the drift and variance components of a...
Persistent link: https://www.econbiz.de/10010263219
This paper proposes a unified approach to derive sharp bounds on all conventional policy parameters when the instrumental variables (IVs) are potentially invalid. Using a Vine Copula approach, we propose a novel characterization of the identified sets for the marginal treatment effect (MTE) and...
Persistent link: https://www.econbiz.de/10012621159
This paper develops a specification test for instrument validity in the heterogeneous treatment effect model with a binary treatment and a discrete instrument. The strongest testable implication for instrument validity is given by the condition for nonnegativity of point-identifiable complier's...
Persistent link: https://www.econbiz.de/10011282657