Sentence:  `` As we look to the $ 800 billion economy that is predicted for 1970 and the increase of about 40 % in consumer expenditures that will be <WSD>required</WSD> to reach that goal , management can well be restless about how this tremendous volume and number of new products will be created and marketed '' , Peterson said . 
Meaning of the word marked with <WSD> tags:  require as useful, just, or proper