DESCRIPTIONDR. STEFFEN WILL ASSIST IN THE ANALYSIS OF DATA FROM THE KEPLER MISSION TO DETERMINE THEARCHITECTURES OF PLANETARY SYSTEMS. DR. STEFFEN'S WORK WILL CONCENTRATE ON THE DISTRIBUTION OFORBITAL PERIOD RATIOS INCLUDING THE DEVELOPMENT AND TESTING OF NEW STATISTICAL QUANTITIES ANDTHE APPLICATION OF EXISTING STATISTICAL TESTS TO THE NEW KEPLER DATA PRODUCTS. DR. STEFFEN WILLALSO CONTRIBUTE TO THE PRODUCTION OF SCIENTIFIC LITERATURE WITH REGARDS TO THIS EFFORT.