This undated publicity photo provided by Birchbox shows a typical monthly beauty sample shipment. Consumers can subscribe to companies like Birch Box to receive monthly shipments of beauty product ...

I’ve always felt that if I had a demonstrably better product than competitors and could only afford to implement one marketing element, it would nearly always be sampling. Sampling breaks through the ...

Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...