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Please give me an example where a modern day industry collapses, or is reduced by progress (such as automation), or by a new industry emerging ... and every job lost being replaced by another gainful-employment type job opportunity? Not in 1790, but in 1970-now.

And I don't mean were other industries absorb the unemployed, because they eventually fill up, and later on collapse themselves for various reasons, mostly more efficiency spelling less jobs.

Millions of auto-workers delivering hot pizzas? That's funny.

> We freed up people to staff the front offices of advertisers and entertainment companies and to bring food to our doorstep.

So is that.

At some point you tip over.

The job market (regardless of industry) always ends up reduced to a few specialists and many low paid automatons (people working in fast food for example, or the FoxConn workforce making iPads, etc) or machines ... relatively speaking.

*To counter my argument, I'll admit there is the internet and the printing press example; and all the jobs the internet has created. But is there enough new revolutions to offset the losses due to increasing efficiencies? I don't think so.

Careers that died since the 1970s?

Typesetter. Fax machine repairman. AOL technician. Watchmaker. Punch card processor. Film developer. Switchboard operator. Typewriter repairman. Encyclopedia salesman. Paperboy. Tinker, tailor, candlestick maker.

(Ok, the last three were older.)

But it's hardly an exhaustive list. Neither was pizza delivery boy for new jobs. We also have oncologists, data scientists, app developers, and (modern) industrial engineers.

(If you want more, type into google "careers that didn't exist" and it will offer suggestions... 20, 10, even 5 years ago. simplyhired shows 72,000 "social media" jobs right now. Even though probably half of them are spam, it's thousands, for a phrase that we just made up a few years ago.)

In the 90s, manufacturing dropped like a rock, but overall, employment ticked up. So did median household income. The shift was primarily due to trade liberalization. The recent recession decimated jobs across many fields, as you'd expect from a drop of jobs due to flagging demand (driven by pressure towards deleveraging, not unexpected given high personal debt to GDP ratios).

So automation isn't displacing workers yet, other factors are. If the automation dystopia hasn't even begun, how do we know it's starting? We go on a hunch, and say technology will probably displace all jobs at some point in the future, maybe five years from now on no evidence, because it feels right?

Will new jobs and new sectors always replace the old? All of economic history suggests yes. Armchair speculation suggests no.

Go with whatever your gut tells you, and forgive me for opting for a more conservative reliance on metrics. Sometimes metrics are wrong, but that's where I hang my hat. I will have your back if we reach 35% unemployment in a few years (or ever). I hope you'll pledge to ditch linear economic forecasting if we hit sub-6% unemployment by 2017.

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