[Double Jeopardy law] Lower market-share brands suffer from both low purchases, and low loyalty
In the 1960s, sociologist William McPhee coined the notion of "double jeopardy", to describe people's sympathy and tendencies toward certain behaviors.
Its application to marketing is due to the statistician Andrew Ehrenberg who made the "double jeopardy" concept an empirical law according to which brands with lower market shares suffer from both low purchases and low brand loyalty.
In other words, less popular brands not only have fewer buyers, but also have fewer loyal customers compared to the dominant popular brands in the market. According to the concept of "double jeopardy", a dominant brand therefore has the highest percentage of purchase and a greater consumer loyalty to its brand. What is for the popular brand a double advantage, has a negative consequence for less popular brands: it is difficult for them to retain their customers and increase their sales because it is not easy to convince buyers that the quality of a product less sold, is of better quality than a brand recognized by all.
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