"doing comparison" is a grammatically correct phrase that can be used in written English
For example, "I was doing comparison shopping to find the best deal."
For consumers doing comparison shopping who don't mind losing access to a teller and paper checks, that makes it competitive with old-fashioned banks that are now charging $8 and up for customers who don't maintain minimum balance levels or have the right relationships with the bank.
They typically spend 10 hours a week online but they're not spending as much time doing comparison shopping.
While that feature is useful when doing comparison shopping for grocery and household items, it can also be used to track down the best prices for any other item, too – like that USB hard drive I have to grab from somewhere today.
While purchasing items: try doing comparison shopping to find the best deals.
Shoppers can and do comparison shop online, weighing different models and reading consumer reviews.
We also did comparison experiment with wavelet and Gabor dictionary.
Maltreated adolescents reported using more disengagement and antisocial strategies than did comparison adolescents.
Junglee allows users to do comparison shopping of many commerce sites.
Panic disorder (PD) patients usually react with more self-reported distress to voluntary hyperventilation (HV) than do comparison groups.
In addition, we did not do comparison between LUS and chest X-ray in the general population (adults and children).
Thus, we could do comparison between different methods based on the independent testing set.
