This directory contains codes for computing the balanced growth path of economies studied in: On Financing Retirement with an Aging Population Ellen McGrattan and Edward Prescott Staff Reports 472/473 There are two sets of codes. The first set has assumes one productivity type (see codes in ./aggregate) and the second assumes multiple productivity types (see codes in ./disaggregate). See also the READMEs in the subdirectories for more details. Ellen McGrattan April 2015