Identify the information diffusion models : (i) Epidemic model (ii) Economic theory model (iii) Engineering model (iv) Ethnography model Codes :
(i) and (ii) are correct
Information diffusion models explain how ideas, innovations and messages spread through a population of users over time.
The epidemic model, applied to scientific communication by Goffman and Newill, treats the spread of an idea like an infection passing from infected (informed) persons to susceptible persons, giving an S-shaped growth of adopters.
The economic theory model explains diffusion through costs and benefits: people seek and pass on information when the expected value of using it exceeds the cost of acquiring it, so information spreads as a resource in a market.
An engineering model describes the design and transmission performance of technical systems, and ethnography is a qualitative research method of observing a community; neither is a model of how information diffuses.
So the information diffusion models in the list are the epidemic model and the economic theory model.
Hence, (i) and (ii) are correct.
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