Economic Theories for the creation of a new or separate Industry? Hey i'm doing a paper on the creation of an industry that has spawned from the another industry. I was wondering if there was particularly any interesting economic theory i should look at. 

Some of my ideas For example because of the inherent social values of society demand is formed for newer services not traditionally offered by the industry creating a niche market segment. To which i guess i can talk about utility maximisation. And that's about how much i have so far.
Have a look at monopolistic competition. It basically details how many industries can find their own niche in a differentiated product market. Some prominent papers in the subject:


Dixit and Stigliz: Monopolistic Competition and Optimum Product Diversity
Krugman: Increasing returns, monopolistic competition, and international trade
Salop: Monopolistic Competition with Outside Goods