The speakers who visit SIPA represent many different sectors. An example is when Kai-Fu Lee, President of Google China, visited and spoke last fall. The talk addressed the business and technical models of Google and how they differ in China, issues of piracy and how computer users in China are impacted by this practice, and the cultural challenges Google faces in reaching out to the populations of different countries such as China.
Ben Colmery, a current SIPA student, did a great write up on the The Morningside Post and I encourage you to read his post, along with watching the video for yourself. The video is 59 minutes in length and you can access it by clicking here.