QUES: Another explanation for the shift between the two sectors may be in structural changes the fact that society is changing from an industrial to a knowledge society

correct the punctuation.

CORRECTED: Another explanation for the shift between the two sectors may be in structural changes, the fact that society is changing from an industrial to a knowledge society.

QUES: The Silicon Valleys output is comparable to a major country such as the New Zealand 1307 billion in 2008 but not quite so great as that of Singapore 1819 billion in 2008

correct the punctuation.

CORRECTED: The Silicon Valley's output is comparable to a major country, such as the New Zealand ($130.7 billion in 2008), but not quite so great as that of Singapore ($181.9 billion in 2008).

QUES: Meanwhile Russia was discovered to be the most unequal in the world simply because the richest 1 of the country owns 745 of the countrys total wealth according to Credit Suisse

correct the punctuation.

CORRECTED:
Meanwhile, Russia was discovered to be the most unequal in the world simply because the richest 1% of the country owns 74.5% of the country's total wealth, according to Credit Suisse.