The reason for this research article age limit of 16-50 because of the age of 16 is the age was beginning to be free to use the internet. So that easy to know and use the shopping form through the network as the voucher. Also the age limit is 50 because after 50 they will at least reach vs. the internet over so that the less well used to voucher. Gender research is primarily a female because women often have more shopping habits. Men primarily use the voucher to buy technology products.
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