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    What is the difference between Principal Component Factor (PCF), Factor Analysis (FA) and Principal Component Analysis (PCA)?

    I understand PCA and FA are both data reduction methods with different assumptions, But when you're extracting the factors using FA, in STATA, you have more than 3 options (FA, PCF, ipf and ML). My concern is on FA, PCF and PCA? how do I differentiate the three? and can one use both FA and PCF...