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Students in this track study the design and functioning of asset markets around the world , the theory of optimal portfolios , the behavior and determinants of asset returns , and techniques of portfolio management . Developed as part of this work , this chartbook documents the pre-Part D landscape of state pharmacy assistance programs . Twice a month , a handful of the 40 grandparents in the group - - mostly white grandmothers in their fifties and sixties , with a couple of grandfathers , too - - gather in a church conference room to share stories and support . At that point , the control group was to be denied what had become part of the national , legally guaranteed benefit package . Ted began our conversation with several claims and illustrative graphs : that when scientists see patterns in the world , the order they describe takes the form of mathematical models , which have to be numerical in order to be testable .