When shoppers find the latest clothing fashions from New York and Milan on sale in stores in Dallas and Phoenix before these show up in El Paso, they are experiencing the effects of a. contagious diffusion b. hierarchical diffusion c. relocation diffusion 2. The tapeworm that causes cysticercosis, often found in undercooked pork, spread rapidly in Mexico City in the 1980s as a direct result of substandard living conditions. This type of diffusion within a population center, where neighbor infects neighbor, illustrates the pattern of a. contagious diffusion b. hierarchical diffusion c. relocation diffusion 3.
Social factors can serve to facilitate diffusion.
This can be seen in comparing Seattle with Miami. Seattle crosses the 100 per 100,000 AIDS threshold in 1991, yet Miami did so in 1988. Miami had such an early appearance on the AIDS map because a. On the basis of population size, Salt Lake City, Utah should have crossed the 100 per 100,000 threshold for AIDS earlier than Las Vegas, Nevada. However, Las Vegas crossed this threshold in 1993 and Salt Lake City had yet to reach this rate by 1995.