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(Pareto MLE and MOME in astronomy) In astronomy, the distribution of asteroid sizes is of great interest (ever watched Armageddon?). Denoting the size of
(Pareto MLE and MOME in astronomy) In astronomy, the distribution of asteroid sizes is of great interest (ever watched Armageddon"?). Denoting the size of asteroid i X;, a common model is: a 1 if r>0 fx(x) else Here, 0 is the minimum size of an asteroid; let's call it 1 meter for now. Suppose we observe a sample of n asteroid sizes X1,..., Xn- 1. Holding 0 fixed, what is the likelihood function for a? 2. What is the MLE of a? 3. Now, assume a is fixed. What is the likelihood function for 0? What is its MLE? 4. Now assume that 0 = 3 meters. Find a MOM estimator for a (The mean of a pareto is a, for a > 1). It is ok to assume a is at lcast 1. %3D 5. Draw obscrvations from a Parcto with a = 2 and 0 = 3. Compute the MLE and MOM estimates for a for various sample sizes. Compare the accuracy of the estimates in a plot, as a function of sample size.
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