Hi, R-helpers,

I am working on a problem of measurement error modeling.  (I am new to this
filed)
The model I am dealing with is simple. Consider a linear regression y= beta0
+ beta1 * x + error, in which x is measured with errors. (the variance of
errors are known. )
I looked up the package simex, and the method is simulation-extrapolation
estimation. So I was wondering that if there is any existing package that
using maximum likelihood approach to estimate the coefficient.

Any suggestions and helps are highly appreciated.

Thank you,
Carrie--

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