Tom and his family have developed a successful business selling a liquid spray fertilizer to farmers. the fertilizer consists of rich, organic, composted material. recently nubreed seed, a national seed company, has been marketing a powdered chemical fertilizer to its customers; nubreed's fertilizer is less expensive than tom's product.
nubreed's efforts are an example of the in porter's model for industry analysis.

a) threats of substitute products and services
b) threats of new ideas
c) power of the suppliers
d) competitive rivalry among competitors
e) buyers' negotiating influence

The interaction of individual choices because a type of fish is on the verge of extinction, the government imposes rules that prohibit fishing in the publicly owned spawning grounds. at first owners of fshing bouts complain about this restriction on where they can fish, but soon they notice that the number of adult fish swimming outside the protected area is much higher than it was before. with the restriction, each fishing boat ends up catching more fish than it did before the r which of the following principles of economic interaction best describes this scenario? o there is a tradeoff between equality and efficiency o markets usually lead to efficiency. o when markets do not achieve efficiency,government intervention can improve overall welfare o markets allocate goodseffectively