ppi index short term models forwarded zimin lu hou ect 03 31 2000 01 43 pm anjam ahmad 03 21 2000 04 10 pm martina angelova lon ect ect trena mcfarland lon ect ect cc dale surbey lon ect ect stinson gibner hou ect ect zimin lu hou ect ect vince j kaminski hou ect ect subject ppi index short term models hi martina believe forecasts accurately reflecting please see graphs models really need rpi curve linked moment copied 2 3 number forward auto regressive error term important run models forward reasonable confidence mentioned think really run model 12 months fact think run 9 12 months blend next 3 4 months long term model hope fix long term ones new insight regards anjam x 35383 pllu dzcv