Hello, A number of issues have come up on parts 3.2 and 3.3 in problem set 3 about the question of iterations (specifically, "If so, after how many iterations?"). Patrick and I have decided to remove this component of questions 3.2 and 3.3 from the problem set. So, questions 3.2 and 3.3 should now read as follows: 3.2. Now use optim() to find the values (x*, y*) that maximize the joint density. Use c(1,0.05) as your starting values and method="BFGS". Report the value of the objective function at the maximum and (x*, y*). Does optim work well here? Did the algorithm converge? If not, why? 3.3. Repeat 3.2 but use c(5,5) as starting values. Report the value of the objective function at the maximum and (x*, y*). Does optim work well here? Did the algorithm converge? If not, why? Best, Miya -- Miya Woolfalk Ph.D. Student Harvard University Government and Social Policy _______________________________________________ gov2001-l mailing list gov2001-l at lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l