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===== Family Formation =====
[[models:caness:caness_main|CanESS]] > [[caness:Demography]] > Family Formation\\
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Family Formation is a calculator that uses information provided by [[caness:demography:population|Population]] as well as family formation rate and age distribution to produce information about families for use in other calculators in the model (this information can also be useful for calibration). It consists of three procedures: Total Families, Families Total, and Number of Persons per Family. 

===(1) Total Families===
^Inputs ^ Outputs ^
|//Canada region population //|//families//|
|//family formation rate//| |
|//mapping of age to family age//| |
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Total Families takes the //Canada region population// (person) from the [[caness:demography:population|Population]] calculator, //family formation rate// (family / person), and //mapping of age to family age// to calculate the //families// (family) array. //Families// is passed on to Families Total, and also to the calculators [[caness:demography:households|Households]], [[caness:energyuse:transportEU:tranSerDem:PassKM|Passenger Kilometres by Mode]], and [[caness:energyuse:transportEU:RoadVeh:PUVeh:PUVehStk|Personal Use Vehicle Stocks]]. 
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===(2) Families Total===
^Inputs ^ Outputs ^
|//families//|//families total//|
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Families Total simply takes the //families// array and collapses some of its dimensions so that the array indices are only time and region. This new array is given the name //families total// (family) (//families// has four indices, as opposed to the two of //families total//). This is passed on to Number of Persons per Family. 
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===(3) Number of Persons per Family===
^Inputs^Outputs^
|//families total//|//persons per family//|
|//Canada total population//| |
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Number of Persons per Family has two inputs: //families total// (family) and //Canada total population// (person), the latter of which is passed on to it by the [[caness:demography:population|Population]] calculator. Using these it calculates the //persons per family// array (person / family), organized by time and region. This is not passed to any other calculator, but may be of interest in analysis or calibration. 
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[[caness:glossary|CanESS Glossary]]
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