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Old 07-01-2014, 12:23 PM
 
Location: Northeast states
10,678 posts, read 8,267,414 times
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How can people can predict there was a 2% population growth in a city for etc 130,000 people lived in a city for 2012 but they predicted 300 new residents for 2013 but why they did'nt count the residents that move out to another towns but only residents they think that move in.
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Old 07-01-2014, 02:33 PM
 
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To get a population estimate they count the number of people from the city who move away, and they also count the number of people who move into the city. (Plus counting births and deaths.)
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Old 07-07-2014, 06:04 AM
 
2,388 posts, read 2,967,524 times
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When the US Census does their estimates they're usually just doing a small sample - they send out a long form questionnaire - the American Community Survey. Then they also count things like births and deaths, building permits, one-way moving van rentals, etc.

I wouldn't put too much stock into the estimates though. In Philly from 1990-2000 the Census was estimating the exact same population loss as 1980-1990 but the loss was about half of their estimates. Then from 2000-2010 they were estimating the same population loss as 1990-2000 but the city actually gained people.

A lot of developed countries do a census every 5 years. In such a large, rapidly changing country I'm not sure why it's still every 10 years.
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Old 07-07-2014, 01:12 PM
 
Location: South Beach and DT Raleigh
11,810 posts, read 18,880,769 times
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Quote:
Originally Posted by drive carephilly View Post
I'm not sure why it's still every 10 years.
...because it costs money to do so.
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Old 07-08-2014, 07:27 AM
 
2,388 posts, read 2,967,524 times
Reputation: 1954
Quote:
Originally Posted by rnc2mbfl View Post
...because it costs money to do so.
That's not really a response to my point but yeah, if you run a business it costs money to do an inventory or an internal audit but you do them anyway because the savings you find usually more than make up for the cost.
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Old 07-13-2014, 12:11 AM
 
Location: South Beach and DT Raleigh
11,810 posts, read 18,880,769 times
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Quote:
Originally Posted by drive carephilly View Post
That's not really a response to my point but yeah, if you run a business it costs money to do an inventory or an internal audit but you do them anyway because the savings you find usually more than make up for the cost.
It may not be your point but I believe it's the reason why it's only done every ten years.
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Old 07-13-2014, 04:52 AM
 
2,388 posts, read 2,967,524 times
Reputation: 1954
Quote:
Originally Posted by rnc2mbfl View Post
It may not be your point but I believe it's the reason why it's only done every ten years.
The reason it's done every 10 years is because it was written into the constitution that way (back when the country was rural/agrarian, small, and had low levels of immigration) it doesn't stop it from being a terrible way to run a business.
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Old 07-14-2014, 03:50 PM
 
3,952 posts, read 4,073,644 times
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It doesn't matter if the US census is done every ten years. Cities that are experiencing enough growth where more up-to-date survey info is useful can do their own surveys, which is a smart way to do business.

And most internal audits are horrible cost-sinks, but are done yearly because that is the requirement. Trust me, I do internal audits on a daily basis (all different areas), and I've never found much in terms of misallocated costs where the audit would even pay for itself.
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