U.S. Move to Bolster Dollar: Jury Out, Reactions Mixed
T E Mullaney on Carter Adm pledges to aid ailing dollar; notes move has generally been lauded but that critics still are worried about possible effects on domestic econ and whether sufficient additional corrective measures will be undertaken; notes contentions of monetarists Tilford Gaines, Arthur M Okun and Robert V Roosa; their pors (M)