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  1. A

    Regression

    My model for thesis is based on CRedit Rating of the firms and its categorized from AAA to CC from 8-1 (scale). The base paper states to use ordered probit regression and other reference paper says ordered logit model. I don't know any of the models. Can anyone guide me when to use such models...
  2. A

    heteroskedasticity

    can anyone tell me is this a plot of heteroskedasticity or homoskedasticity.