(n) the phenomenon of a popular trend attracting even greater popularity, Example:in periods of high merger activity there is a bandwagon effect with more and more firms seeking to engage in takeover activity; polls are accused of creating a bandwagon effect to benefit their candidate
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
[びんじょうしょうほう, binjoushouhou] (n) piggybacking marketing; the method of making sales by jumping on a bandwagon (like that of a boom, popularity, disaster, etc.)