Thefutureisalwaysuncertain.Butatsometimes,andnowisonesuchtime,therangeofpossiblenear-futureeventsisenormous.Themajorsourceofthisgreatuncertaintyiseconomicpolicy.Thereisuncertaintyaboutthewayinwhichinternationaltradepolicywillevolveasprotectionismisreturningtothepoliticalagenda.Th