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# To develop more accurate population forecasts, demographers

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Re: To develop more accurate population forecasts, demographers [#permalink]

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30 Jun 2012, 05:01
D for me too. However, is 'they' justified for demographers alone, and not for forecasts?
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Re: To develop more accurate population forecasts, demographers [#permalink]

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30 Jun 2012, 05:53
+1 for (D)

(C) & (D) has the tie but (D) wins because "economic" refers to the "determinants of fertility" whereas "economical" is used in monetary context.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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10 Feb 2013, 02:13
MGMAT says 'would' is used to express the future from the past's point of view.

Ex- The scientist believes that the machine would be wonderful

The above example is wrong as 'believes' is in present. If believes is replaced by 'believed' the ex becomes correct.

Now can someone explain why would is used here as the tense used in the question is simple present/present perfect.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 03:34
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments 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

Question 32 Set 1

help

"they" in D is correct because it parallel with "demographers" . This situation of pronoun ambiguity is acceptable according to gmat standard.

D is pattern of parallelism between main clause and subordinate clause. This kind of paralellism is tested brutally in the question " paris is her home before it it fastionable to be..." which you can search on the internet.

the concept tested here is that kind of parallelism.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 07:34
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rajathpanta wrote:
MGMAT says 'would' is used to express the future from the past's point of view.

Ex- The scientist believes that the machine would be wonderful

The above example is wrong as 'believes' is in present. If believes is replaced by 'believed' the ex becomes correct.

Now can someone explain why would is used here as the tense used in the question is simple present/present perfect.

Hi rajathpanta,

The scientist believes that the machine would be wonderful --> is incorrect because here we are mixing present with conditional.

Why is this so? because it is a rule. For conditionals there a few rules and you have to just remember them, there is not much to understand here. The rules on Conditionals are governed by set rules. MGMAT has explained the rules quite well, just make a note of them.

Consider this sentence: The scientist said that the machine would be wonderful. --> here "would" is expressing past as it is being used in the reported speech. The sentence is correct as per another rule on the usage of would.

The scientist believed that the machine would be wonderful - Correct usage, "would" expresses future from the past point of view.

Hope that helps,

Vercules
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 07:44
Vercules wrote:
rajathpanta wrote:
MGMAT says 'would' is used to express the future from the past's point of view.

Ex- The scientist believes that the machine would be wonderful

The above example is wrong as 'believes' is in present. If believes is replaced by 'believed' the ex becomes correct.

Now can someone explain why would is used here as the tense used in the question is simple present/present perfect.

Hi rajathpanta,

The scientist believes that the machine would be wonderful --> is incorrect because here we are mixing present with conditional.

Why is this so? because it is a rule. For conditionals there a few rules and you have to just remember them, there is not much to understand here. The rules on Conditionals are governed by set rules. MGMAT has explained the rules quite well, just make a note of them.

Consider this sentence: The scientist said that the machine would be wonderful. --> here "would" is expressing past as it is being used in the reported speech. The sentence is correct as per another rule on the usage of would.

The scientist believed that the machine would be wonderful - Correct usage, "would" expresses future from the past point of view.

Hope that helps,

Vercules

Hi Vercules,

Thanks. Can you explain how this rule is applicable to the question discussed here.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 07:48
Hi rajathpanta,

Which question you are referring to. The main question of the post or your specific question. If it is your specific question, the please let me know which one.

Vercules
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 07:52
Vercules wrote:
Hi rajathpanta,

Which question you are referring to. The main question of the post or your specific question. If it is your specific question, the please let me know which one.

Vercules

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments 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

Here, why is would used?? I wanted to understand that as per your explanation given.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 10:12
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rajathpanta wrote:
Vercules wrote:
Hi rajathpanta,

Which question you are referring to. The main question of the post or your specific question. If it is your specific question, the please let me know which one.

Vercules

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments 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

Here, why is would used?? I wanted to understand that as per your explanation given.

Hi rajathpanta,

In my last explanation I did not discuss hypothetical would, but a few rules related to would. I guess that you are confused because you are not able to find any conditional construct in the question above. The hypothetical would is used based on the context of the sentence. In almost all the questions which test standard conditional constructs "if then" constructions are used.

See the below question from OG12 which uses the conditional if x happened, then y would happen.

Q 67) Affording strategic proximity to the Strait of Gibraltar,.......

In the question above hypothetical conditional would is used. The sentence expresses a hypothetical situation, which needs a hypothetical conditional would. But, the incorrect answers are incorrect for different reasons, other than the use of would.

The question does not really test your knowledge on conditionals if you solve it by POC. The following question will also have the correct answer as (D). I have just made a change in option (D) ( "would have to" to "have to")

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments 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) 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

Correct choice is (D) because other options are wrong for clear grammatical and contextual errors; Although, "would have to know" will be better because the hypothetical situation is being discussed

The same conditional is tested in the following OG question;

Q 16) Retail sales rose 0.8 of 1 percent in August,
intensifying expectations that personal spending.....

I hope the above explanation helps,

Vercules
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 10:55
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of if there is a conditional and there are options with 'would' and options without 'would' we should prefer the 'would' ones is what I can gather as of now.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Feb 2013, 11:15
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rajathpanta wrote:
of if there is a conditional and there are options with 'would' and options without 'would' we should prefer the 'would' ones is what I can gather as of now.

Hi rajathpanta,

From what I have seen in a lot of GMAT questions, I agree with you. In my estimate, I think you will be correct 80% of the times in selecting answer choice with would. Most often than not I have seen that it is relatively easier to do a 3:2 split based on apparent errors, but if you are stuck between two otherwise correct answer choices, which differ in the placement of just a word, then the choice with that word is likely to be the correct one.

Following example from OG12 contains an incorrect "would" option.

Q 39) In 1527 King Henry VIII sought to have his marriage to.......

Option (E) contains a conditional would, but you can get from the meaning that the usage is incorrect.

Vercules
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Re: To develop more accurate population forecasts, demographers [#permalink]

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29 May 2013, 03:18
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments 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

Question 32 Set 1

help

Went wrong by choosing economical over economic....D sounds better than C.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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31 May 2013, 17:05
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments 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

Question 32 Set 1

help

Just want to share my thoughts here:
i think the construction would and would have will go here. The only difference is between economic and economical. This eliminates B,C and E. In A the comparison is incorrect. D Wins.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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11 Jun 2013, 00:56
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hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments 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

Question 32 Set 1

help

First split: economical VS economic
*Economical = efficient
*Economic = "money" value
==> Clearly, "economic detriments" is correct ==> B, C, E are out
A is wrong because the intended meaning is: in the future, demographers would have to know .... more than they do now. But in A, "have to know...more than now" is incorrect.

Only D is correct.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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02 Oct 2013, 10:57
1) To get 700 in gmat , I have to score 48 in quant and 38 in verbal section .
2) To get 700 in gmat , I would have to score 48 in quant and 38 in verbal section .

Is the # 1 incorrect because of same reasons as in this OG problem ?
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Re: To develop more accurate population forecasts, demographers [#permalink]

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04 Aug 2014, 03:15
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments 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

Question 32 Set 1

help

this is old question. both A and E is correct. there is no ambiguity in choice A. we will never have to choose betwen A and D on the test
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Re: To develop more accurate population forecasts, demographers [#permalink]

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06 Mar 2015, 00:43
I think we use 'would' here because we think about the sentence structure : if they were to develop ....
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Re: To develop more accurate population forecasts, demographers [#permalink]

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27 Mar 2015, 10:37
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments 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

Question 32 Set 1

help

One must note a use of 'would' to show uncertainty.

Secondly, one must also note a difference between economic vs. economical.

economic is the subject economics.

economical is cheap/ low price

Hence, option D is a right choice with correct usage of would and economic.
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Re: To develop more accurate population forecasts, demographers [#permalink]

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26 Aug 2015, 04:51
Economic v/s economical

Economic is the correct option in this case.

that eliminates A,B,C

Between D and E, Answer is D
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Re: To develop more accurate population forecasts, demographers [#permalink]

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28 Aug 2015, 19:37
hbs2012 wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments 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

Question 32 Set 1

help

if A contain "in the future" so that it parallel to "now" then, A will be correct

if we can use "now" in the second part of comparison but have no corresponding part in the first part such as "in the future" the sentence is not parallel.

we add"they do" to make sentence paralel.

A means

they have to know more than they have to know now.
future time is needed in the first part of sentence
Re: To develop more accurate population forecasts, demographers   [#permalink] 28 Aug 2015, 19:37

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