===== Population =====
[[models:caness:caness_main|CanESS]] > [[caness:Demography|Demographics]] > Population\\
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The Population calculator contains three procedures: Net Immigration, Evolve Population and School Population.

===(1) Net Immigration ===

^ Inputs           ^ Outputs                          ^
| //emigration// (person/year)  | //net international immigration// (person/year) |
| //immigration// (person/year) |                                   |

The Net Immigration procedure uses //immigration// (person/year) and the //emigration// (person/year) to calculate //net international immigration// (person/year). These variables are specified by region, gender, time and age. The //net international immigration// is passed on to Evolve Population.

===(2) Evolve Population ===

^Inputs ^Outputs^
|//net international immigration// (person / year)|//deaths// (person / year)|
|//base population// (person)|//births// (person/year)|
|//total period fertility// (/year)|//actual net international immigration// (person/year)|
|//births distribution// (/year)|//internal movers// (person/year)|
|//gender shares at birth// (/year)|//Canada region population// (person) passsed [[CanESS:demography:famForm|Family Formation]] and [[CanESS:energyUse:comSecEU:comFlrSpc:comFlrSpcPARB|Commercial Floor Space Population Age Related Buildings]]|
|//mortality// (/year)|//Canada total population// (person) passed to [[CanESS:demography:famForm|Family Formation]], [[CanESS:macroEconomy:macroEcon:Macro Economics]], [[CanESS:foodProd:foodBMReq|Food Biomass Requirements]] FIXME|
|//international immigration mobility// (/year)| |
|//internal immigration share// (share per gender and age)| |

The evolve population procedure combines information on //net international immigration// (person / year), //base population// (person), //total period fertility// (/year), //births distribution// (/year), //gender shares at birth// (/year), //mortality// (/year), //international immigration mobility// (/year), and //net immigration share// (/year) to generate //deaths// (person/year), //births// (person/year), //actual net international immigration// (person/year), //internal movers// (person/year), and  //Canada region population// (person) by region, gender, time and age. //Canada region population// is passed on to the calculators [[caness:demography:famform|Family Formation]] and [[caness:energyuse:comseceu:comflrspc:comflrspcparb|Commercial Floor Space Population Age Related Buildings]].

It also provides the //Canada total population// (person) by region and time. This variable is passed on to the calculators [[caness:demography:famform|Family Formation]], [[caness:macroeconomy:macroecon|Macro Economics]], [[caness:foodprod:foodbmreq|Food Biomass Requirements]], [[caness:energyuse:streetlighteu|Street Lighting Energy Use]], [[caness:energyuse:transporteu:roadveh:cuveh:cuvehstk|Commercial Use Vehicle Stock]], [[caness:energyuse:comseceu:comflrspc:comflrspctpr|Commercial Floor Space Total Population Related]], [[caness:energyuse:comseceu:comflrspc:comflrspcoffice|Commercial Floor Space Office]], and [[caness:eneryuse:resourceprdeu:biomassprdaeu:munwbmprd|Municipal Waste Biomass Production]].

===(3) School Population ===

^ Inputs ^ Outputs ^
|//Canada region population// (person)|//school age population// (person) |

The school population procedure derives the //school age population// (person) by region and time from the //Canada region population// (person). This variable is used in the calculator [[caness:energyuse:transporteu:transerdem:passkm|Passenger Kilometers by Mode]].
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[[caness:glossary|CanESS Glossary]]