00732nam0-22002891i-450-990003061440403321000306144FED01000306144(Aleph)000306144FED0100030614420000920d--------km-y0itay50------baitaITEconomic Tracking PortfoliosOwen LamontWorking paper seriesNBER7055PrevisioniStati UnitiJ/4.30J/4.31Lamont,OwenITUNINARICAUNIMARCBK990003061440403321PaperSESSESEconomic Tracking Portfolios465549UNINAING01