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Identification, Weak Instruments and Statistical Inference in Econometrics
(Université de Montréal. Département de sciences économiques., 2003)
We discuss statistical inference problems associated with identification and testability in econometrics, and we emphasize the common nature of the two issues. After reviewing the relevant statistical notions, we consider ...
Distribution-Free Bounds for Serial Correlation Coefficients in Heteroskedastic Symmetric Time Series
(Université de Montréal. Département de sciences économiques., 2005)
We consider the problem of testing whether the observations X1, ..., Xn of a time series are independent with unspecified (possibly nonidentical) distributions symmetric about a common known median. Various bounds on the ...
Simulation-Based Finite-Sample Tests for Heteroskedasticity and ARCH Effects
(Université de Montréal. Département de sciences économiques., 2001)
A wide range of tests for heteroskedasticity have been proposed in the econometric and statistics literature. Although a few exact homoskedasticity tests are available, the commonly employed procedures are quite generally ...
Quadratic M-Estimators for ARCH-Type Processes
(Université de Montréal. Département de sciences économiques., 1998)
This paper addresses the issue of estimating semiparametric time series models specified by their conditional mean and conditional variance. We stress the importance of using joint restrictions on the mean and variance. ...