Generalized autoregressive conditional heteroskedasticity (GARCH) processes have become very popular as models for financial return data because they are able to capture volatility clustering as well as leptokurtic unconditional distributions which result from the assumption of conditionally...

Dummy endogenous variables are commonly encountered in program evaluations using observational data. Motivated by the increasing availability of rich micro data, we develop a two-stage approach to estimate the dummy endogenous treatment effect using high-dimensional instrumental variables (IV)....

The autobiographical study revealed three Ph.D. students and inservice teachers' perceptions of curriculum theorizing. Three teachers in the study are one from China, one in the United States and one from Saudi Arabia. Reflective journals, written philosophies of curriculum theorizing, and...