BUSINESS DIGEST
The Economy Plunging interest rates are putting money into the pockets of millions of Americans and many corporations. And so far they have been using this new-found cash mostly to reduce their debts, behaving with much more wariness than in the past. [ Page D1. ] President Clinton has chosen Joseph E. Stiglitz to be the third member of the Council of Economic Advisers, Administration officials say. Many economists view the highly regarded Stanford University professor as an odds-on favorite to win a Nobel Memorial Prize at some point in his career. [ D1. ]