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September 30, 2015 at 7:47 pm
First of all i am going to comment here for the very first time. I never saw such a outstanding lectures in my life. And most importantly you are providing with these helpful lectures to all students of A.C.C.A . I am very thankful to you. Now i have a question, Dear Sir in your notes, you stated the formula of PRICE ELASTICITY OF DEMAND= % change in demand divided by % of change in price but while calculating B , you took change in price over change in demand. Are they separate things may be i am misunderstood ? and if they aren’t then why there is a change in formula ?
Thanks in advance
John Moffat says
October 1, 2015 at 6:41 am
Thank you for your comments
They are two different things. B measures how the price and demand change with each other. Elasticity looks in percentages to measure how big or small the effect of a change on price will be.
Kerri - Ann says
April 22, 2015 at 10:29 pm
Good Day John,
Hope all is well. Glad to be back with you.
I am doing Example 3 in Chapter 7 (Price Elasticity of Demand) and I am a bit confused.
The PED is = % change in demand / % change in price
Therefore to answer the example my formula should read:
((D2- D1)/D1))*100 ((200-100)/100))*100 = 100
————————– ——————————– ——- = 30.12
((P2- P1)/P1))*100 ((16 – 15.5)/15.5))*100 = 3.32
Am I correct?
April 23, 2015 at 9:39 am
The top bit is correct, but for the demand to increase the price has to fall from 16 to 15.5, and so the bottom of the formula should be (15.5-16)/16.
The answers to all of the examples are at the back of the Lecture Notes (see the contents page)
April 23, 2015 at 12:33 pm
Or so the demand increases but the price decreases and so the formula would change to the bottom. Got it.Thanks
April 9, 2015 at 7:17 am
Sorry for using this forum, but if possible can you guys change the VIMEO player or uploader to youtube. I have been experiencing a tough time in watching the videos in this player for the past 3 weeks, but when it is the ones uploaded in youtube i don’t have problems. I also viewed the technical help you offer and realized all my players are up to date, and the network has a good strength.
April 9, 2015 at 10:10 am
Sorry, if you can watch YouTube videos, than Vimeo should all work.
You don’t even mention what browser or device you are using.. Or what country
YouTube js blocked in far more countries than Vimeo, and we won’t change to YouTube im afraid
April 9, 2015 at 7:38 pm
Thanks for the reply. Am using Adobe Flash player (updated) and also using google crome (updated). Since you are not going to change is there any other option.
April 10, 2015 at 2:43 am
Try tor browser
December 17, 2014 at 6:48 pm
I am totally confused …….during the formula when he arrives at – 1 = 0 -2500b
how on earth did he manage to do 1/2500 ? when they are minus numbers ?
December 17, 2014 at 7:09 pm
‘He’ is me!!
If -1 = -2500b
then divide both sides by -2500, and 1/2500 = b
(You should know from school that dividing a negative number by a negative number results in a positive number)
January 1, 2015 at 10:48 am
I wish there was a like button
November 8, 2014 at 7:01 pm
If we start from 16 and demand of 100, then changing to 15.5 means that demand goes up from 100 to 200 – a percentage change of (200-100)/100 = 100%
Price goes from 16 to 15.5 which is a percentage change if (16 – 15.5)/15 = 3.33%
The formulae you wrote were wrong. It should be P2 – P1 / P1; and D2 – D1 / D1
November 6, 2014 at 5:24 pm
hello sir, i am a bit confused with example 3 i used the formula
% change in price=(P1-P2)/P2*100
% change in demand=(Q2-Q1)/Q2*100
when i am applying this formula to the question example 3 i am getting the answer as 16 for the first one and 7.25 for the second one. And behind the book its different answers which do not match mine. i am very confused sir please reply
November 6, 2014 at 5:31 pm
I am not sure what to answer, because the solution at the back of the notes shows the workings.
You do not say how you managed to arrive at 16 and 7.25.
If you say how your workings were different from the answer then I will try and explain where you have gone wrong.
November 8, 2014 at 3:19 pm
P1 is 16 P2 15.5 Q1 100 Q2 200
So the formula applies as PED=%QD / %PRICE
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