Let \(X_1\), \(X_2\), …, \(X_n\) be iid from some member of this parametric family:

\[ f(x\,|\,\theta) = \frac{1}{2\theta}\exp\left(-\frac{|x|}{\theta}\right), \quad -\infty<x<\infty. \]

  1. What is the maximum likelihood estimator of \(\theta>0\)?
  2. What is the sampling distribution of the estimator?
  3. What is the MSE of the estimator?
  4. Based on the MSE, what are the statistical properties of this estimator?