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# To develop more accurate population forecasts, demographers

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Manager
Joined: 19 Aug 2006
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To develop more accurate population forecasts, demographers [#permalink]

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05 Jun 2007, 08:38
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To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

A. have to know a great deal more than now about the social and economic
B. have to know a great deal more than they do now about the social and economical
C. would have to know a great deal more than they do now about the social and economical
D. would have to know a great deal more than they do now about the social and economic
E. would have to know a great deal more than now about the social and economical

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Intern
Joined: 03 May 2007
Posts: 44

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Schools: Olin

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05 Jun 2007, 09:34
I guess it should be 'B'

a) comparision is being done to the "now"
C, D and E, I feel that "would have" is the not the correct usage here

johnycute wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

A. have to know a great deal more than now about the social and economic
B. have to know a great deal more than they do now about the social and economical
C. would have to know a great deal more than they do now about the social and economical
D. would have to know a great deal more than they do now about the social and economic
E. would have to know a great deal more than now about the social and economical

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Senior Manager
Joined: 11 May 2004
Posts: 327

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06 Jun 2007, 00:19
johnycute wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

A. have to know a great deal more than now about the social and economic
B. have to know a great deal more than they do now about the social and economical
C. would have to know a great deal more than they do now about the social and economical
D. would have to know a great deal more than they do now about the social and economic
E. would have to know a great deal more than now about the social and economical

economical changes the meaning - B, C, E out

A -- after more than comparison error (apples and oranges) - tense is wrong

D - my choice.

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Senior Manager
Joined: 27 Mar 2007
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06 Jun 2007, 00:29
Can anyone explain the differnce of (C) and (D), i.e. 'economical vs. economic'. It seems that in SC 'economic' is prefered?! cheers

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Manager
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06 Jun 2007, 05:49
OA is D.

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Senior Manager
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06 Jun 2007, 17:21
catgmat wrote:
Can anyone explain the differnce of (C) and (D), i.e. 'economical vs. economic'. It seems that in SC 'economic' is prefered?! cheers

I was questioning that also. So far, GMAT does seem to prefer economic over economical. Just as GMAT prefers, most of the time, 'whether' over 'if'.

D it is.

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Manager
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05 Nov 2009, 22:32
"Would have" is a past conditional auxiliary verb phrase.

The word "to develop" demands "would have"

So the choice A and B are gone.

"economic" is related to the economy, while "economical" refers to saving money. So E and C are out

So IMO the answer is D

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Manager
Joined: 23 Jun 2009
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07 Nov 2009, 23:54
johnycute wrote:
OA is D.

What is the source and "OE"?
IMO "B". I disagree with the usage of "would".."will" fits in here. Grammar Gurus -can someone explain why " would.." is appropriate?

Posted from my mobile device

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Re:   [#permalink] 07 Nov 2009, 23:54
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# To develop more accurate population forecasts, demographers

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