Multiple Choice
You experiment by offering free warranties for your product in market A but not in market B.Sales in A rise from 240 to 360 units per week while sales in B rise from 410 to 430.The Difference-in-difference estimate of the effect of the free warranty is:
A) 80 units
B) 100 units
C) 120 units
D) 140 units
Correct Answer:
Verified
Correct Answer:
Verified
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