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In this study, the overall performance for the regular optimum likelihood (ML) estimation is in contrast to two bias correction methods including weighted logistic regression (WLR) and Firth's penalized maximum chance (PML) to examine DIF for imbalanced or rare events data. The ability and kind I error price associated with the LR model for detecting DIF had been investigated under different combinations of test dimensions, moderate and extreme

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Copyright © 2020 American Chemical Society.The reaction of molybdenum(II) and chromium(II) acetates with squaric acid in degassed and deionized water under hydrothermal conditions at 150 °C is described. The products have been formulated as M2(μ-OH)2(μ-C4O4)2(H2O)4·2H2O, where M = Cr (1) and Mo (2), based on combustion elemental analysis, infrared spectroscopy, magic angle spinning (MAS) solid-state carbon-13 nuclear magnetic resonance (NMR), and single-crystal X-ray diffraction. The edge-shared bioctahedral structures involve