[Arcten]

From personal experience, I can say that Google was only willing to extend an internship offer a week past their initial two week deadline. This is despite the fact that I was still interviewing with other companies at the time. From speaking with my university's career center I am not the only person this happened to.

[erehweb]

Interesting. From "Work Rules" by Google's head of People Analytics. "I think they [exploding offers] put a lot of unfair pressure on the candidate, who should be free to make the best decision for herself without duress. After all, companies have lots of employees, but each person holds only one job. It should be one they are sure of."

[amazon_thr0way]

Same with Amazon for the most part. Returning internships are only allowed 2 weeks. Full time offers after internships are given 2 weeks, but you can ask for an extension which does last a couple months. However, you're given a questionnaire on the type of team you want to be on and the longer you wait to accept your offer, the lower on the queue you will be for getting the team you want.

[sharpy]

It really depends on how much they want you, and how you negotiate. I recently changed jobs. I ended up getting multiple offers, and for all but 1 of them, they were willing to wait 3 weeks for me to make a decision. I was very upfront about that if they were not, I wasn't interested in them, however.