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2 votes

SEM: Multivariate normality of the residuals?

Most SEM experts probably agree that violations of multivariate normality are not as problematic nowadays given that appropriate correction methods for the standard errors and test statistics (which ...
Christian Geiser's user avatar
4 votes
Accepted

Why are error properties in linear regression assumptions if they are true by construction?

Distinctions First let us differentiate two levels. The true model. We can also call this the data generating process or a structural model. It is structural in the sense that it reflects how each ...
Kuku's user avatar
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3 votes

Why are error properties in linear regression assumptions if they are true by construction?

Why are error properties in linear regression assumptions if they are true by construction? $E(\epsilon) = 0$ $cov(X, \epsilon) = 0$ ... However, both of these are just results of fitting a least ...
markowitz's user avatar
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2 votes
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Fitting regression where data is concentrated at the origin

As Nick posited, it seems somewhat implausible to use the age of acquisition measure unless there are raters who can independently verify the veracity of these ratings in some way. While there are ...
Shawn Hemelstrand's user avatar

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