For example, because of wage differentials between the countries, U.S. apparel-makers would need to be 2.5 times more productive than firms in Hong Kong to be  competitive. 
( ( For example ) ( , ( ( because ( of ( ( wage differentials ) ( between ( the countries ) ) ) ) ) ( , ( ( U.S. apparel-makers ) ( ( would ( need ( to ( ( be ( ( ( 2.5 times ) ( more productive ) ) ( than ( firms ( in ( Hong Kong ) ) ) ) ) ) ( to ( be competitive ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (PP (IN For) (NP (NN example))) (, ,) (PP (RB because) (PP (IN of) (NP (NP (NN wage) (NNS differentials)) (PP (IN between) (NP (DT the) (NNS countries)))))) (, ,) (NP (NNP U.S.) (NNS apparel-makers)) (VP (MD would) (VP (VB need) (S (VP (TO to) (VP (VB be) (ADJP (ADJP (QP (CD 2.5) (NNS times)) (RBR more) (JJ productive)) (PP (IN than) (NP (NP (NNS firms)) (PP (IN in) (NP (NNP Hong) (NNP Kong)))))) (S (VP (TO to) (VP (VB be) (ADJP (JJ competitive)))))))))) (. .)))
Hong Kong firms produced so well because the workers were all happy.
( ( Hong ( Kong firms ) ) ( ( ( produced ( so well ) ) ( because ( ( the workers ) ( ( were all ) happy ) ) ) ) . ) )
(ROOT (S (NP (NNP Hong) (NNP Kong) (NNS firms)) (VP (VBD produced) (ADVP (RB so) (RB well)) (SBAR (IN because) (S (NP (DT the) (NNS workers)) (VP (VBD were) (RB all) (ADJP (JJ happy)))))) (. .)))