	u s official sees evidence of export growth beryl sprinkel chairman of the white house council of economic advisers said he sees growing but incomplete evidence that u s export volumes are finally strengthening in remarks prepared for a speech today in los angeles sprinkel said the decline in the dollar s value since had largely restored u s cost competitiveness in world markets and appeared to signal an end to u s  imbalances i am confident that further improvements in our  performance will contribute significantly to u s growth in he said reuter 
