We live in an age of magnificent technological transformation, half of the electronic gadgetry and scientific capabilities that we have today existed only in our imagination some 10 or 20 years ago. Along with this technological revolution many old mundane and repetitive factory jobs are being replaced by more efficient technology; leaving only a skeleton staff of highly trained engineers and technicians working in the factories. Unfortunately when a technological breakthrough comes people may have difficulty foreseeing it or be unable to plan ahead to retrain for a new job when their existing job ultimately gets made redundant. This technological or structural/transitional unemployment has been around through the centuries but it appears to be speeding up now. So while there are many many positives there are people who get left by the wayside. Interestingly for the finance world, computers and technology have also had an impact; with the old trading floors giving way to new computer driven markets - see the documentary "Floored" for a great look at the impact of technology on the finance world.
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Finance Documentaries: http://www.financedocumentaries.com/2012/04/i-lost-my-job.html