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Price Elasticity Chart

Hi,  

I am trying to figure out a way to chart price elasticity on an array of items.  I've included a formula below for price elasticity, which works fine for one items data.  Maybe a pivot table with a calculated field?  

My data looks like

ITEM_NO     QTY_SOLD      DOLLAR_SALES
10001          25                    200.00
10001          12                    350.00
10002          20                    200.00
10002          15                    300.00

Price Elasticity of Demand = % change in demand / % change in price

     Change in Demand  = (Quantity2 - Quantity1) / ((Quantity1 + Quantity2)/2)
     Change in Price % = (Price2 - Price1) / ((Price1 + Price2)/2)



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patrickab
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AD1080,

Perhaps as in the attached file.

Patrick
demand-price-elasticity-01.xls
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AD1080

ASKER

Hi Patrick,

I don't think this is achieving the goal I am after.

I see item number 10002 twice with two elasticity values.  

Having achieved my aim, there would only be one value for each item number.  Do you know how I could do this, and chart it?  
AD1080,

Perhaps as in the attached file.

Patrick
demand-price-elasticity-02.xls
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ASKER

Hi Patrick,

I apologize as I didn't include an important detail to my original question.

I will have 26 rows of data for each item number.

Having added that complication, do you see a way to achieve my goal?  

Thanks
Ariel
Ariel,

Please upload your file with the data.

Patrick
Ariel,

Please also let me know the way in which the elasticity should be calculated for 26 data points?

For example should it be:

Change in Demand  = (MaxQuantity2 - MinQuantity1) / ((MaxQuantity1 + MinQuantity2)/2)
Change in Price % = (MaxPrice2 - MinPrice1) / ((MaxPrice1 + MinPrice2)/2)

or some other basis?

Patrick
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ASKER

Hi,

Here is a file with some of the sales data I am working with.  

I have 26 sales periods.  Using the sales quanity and unit price from each of these periods, I want to calculate the overall elasticity of each unique item number.

Does that clarify my intent well enough?  I am not sure if your example above is applicable to my goal or not.  
26-Week-Sales-Data.xls
Ariel,

You still have not told me how you have only one number from 26 points of data for elasticity. Until you do that I cannot extract those numbers.

Patrick
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ASKER

Hi Patrick,

Would you be willing to suggest what you would consider the most effective means to determine the elasticity of demand relative to price, considering the 26 sales periods, and the volume and retail price during each of those periods?  

Ariel
Ariel,

I haven't clue how it's meant to be done! I will attmpt to do whatever you consider to be correct. Over to you...

Patrick
SOLUTION
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Jeffrey Coachman
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ASKER

Thanks Patrick, Jeff, and Byundt,

While my question was poorly phrased, you managed to understand what I was trying to do.

Really appreciate it.

Ariel
Ariel - Thanks for the points - Patrick
Thanks,

My interest here was only in the "Theory" behind your question.
My hope was that my request for clarification would help other Experts to pitch in.

I also have a keen interest in Charts/Graphs form my MS Access experience.

FWIW, I have no issue with you giving my share of the points back to patrickab and byundt

;-)

Jeff