Re: How long should one stay in the same job?
Kinz you are absolutely right.. that is why it makes it even more important that you remain an employee in the top ranging firms in the job market ..
Two years ago , I met an accountant whome I had placed at a small size accountancy firm some four years ago .. I asked him what he was upto and he said he was joining a big 4 firm .. and then he said , the job market is so competitive , even though he was learning more at the smaller firm, he’s now making a decision to move to a larger firm coz due to recession, smaller businesses are at greater risk of closing down ..
He also added that since he is moving into a larger firm, right at the peak of recession , he will be safe from being jobless at least for the next few years .. now that was smart thinking wasnt it 
So, if you want to remain in demand, move jobs 5-7 years .. but ensure you find your next move first