2015/01/01 by Jianqing Fan, Yuan Liao, Jiawei Yao · 412 citations
Economics, Econometrics and Finance · Mathematics · #Alternative hypothesis #Applied mathematics #Artificial intelligence #Computer science #Convergence (economics) #Data mining #Independence (probability theory) #Mathematical optimization #Mathematics #Null (SQL) #Null distribution #Null hypothesis #Quadratic equation #Spatial and Panel Data Analysis #Statistic #Statistical Methods and Bayesian Inference #Statistical Methods and Inference #Statistical hypothesis testing #Statistics #Test statistic #Thresholding #Wald test
paper · doi:10.3982/ecta12749
published in Econometrica 83(4), 1497-1541 (Wiley)
openalex publication_date 2015/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
= 0 against sparse alternatives where the null hypothesis is violated only by a couple of components. Existing tests based on quadratic forms such as the Wald statistic often suffer from low powers due to the accumulation of errors in estimating high-dimensional parameters. More powerful tests for sparse alternatives such as thresholding and extreme-value tests, on the other hand, require either stringent conditions or bootstrap to derive the null distribution and often suffer from size distortions due to the slow convergence. Based on a screening technique, we introduce a "power enhancement component", which is zero under the null hypothesis with high probability, but diverges quickly under sparse alternatives. The proposed test statistic combines the power enhancement component with an asymptotically pivotal statistic, and strengthens the power under sparse alternatives. The null distribution does not require stringent regularity conditions, and is completely determined by that of the pivotal statistic. As specific applications, the proposed methods are applied to testing the factor pricing models and validating the cross-sectional independence in panel data models.