Diffusion of innovations - Wikipedia, the free encyclopedia: "Diffusion of Innovations is a theory of how, why, and at what rate new ideas and technology spread through cultures. The concept was first studied by the French sociologist Gabriel Tarde (1890) and by German and Austrian anthropologists such as Friedrich Ratzel and Leo Frobenius.[1] Its basic epidemiological or internal-influence form was formulated by H. Earl Pemberton[2], who provided examples of institutional diffusion such as postage stamps and compulsory school laws."
meme, idea spreading, technology adoption,
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