外在環境→個體行為→個體績效
S→C→P 產業結構→廠商行為→產業內的廠商績效
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Overcome 9 of the most common market entry barriers with these strategies - Trade Ready
The Five Competitive Forces That Shape Strategy
https://hbr.org/2008/01/the-five-competitive-forces-that-shape-strategy
Apple's Itune Strategy on-line music.pdf
How iTunes Changed the Music Industry | Apple Music | MBA case study examples with solution
https://vocus.cc/article/5a420ef2eceaedd6be919692
